共用方式為

DataGridViewComboBoxColumn 類別

  • 參考

定義

命名空間:
System.Windows.Forms
組件:
System.Windows.Forms.dll

代表 DataGridViewComboBoxCell 物件的資料行。

public ref class DataGridViewComboBoxColumn : System::Windows::Forms::DataGridViewColumn
[System.Drawing.ToolboxBitmap(typeof(System.Windows.Forms.DataGridViewComboBoxColumn), "DataGridViewComboBoxColumn.bmp")]
public class DataGridViewComboBoxColumn : System.Windows.Forms.DataGridViewColumn
[System.Drawing.ToolboxBitmap(typeof(System.Windows.Forms.DataGridViewComboBoxColumn), "DataGridViewComboBoxColumn")]
public class DataGridViewComboBoxColumn : System.Windows.Forms.DataGridViewColumn
[<System.Drawing.ToolboxBitmap(typeof(System.Windows.Forms.DataGridViewComboBoxColumn), "DataGridViewComboBoxColumn.bmp")>]
type DataGridViewComboBoxColumn = class
    inherit DataGridViewColumn
[<System.Drawing.ToolboxBitmap(typeof(System.Windows.Forms.DataGridViewComboBoxColumn), "DataGridViewComboBoxColumn")>]
type DataGridViewComboBoxColumn = class
    inherit DataGridViewColumn
Public Class DataGridViewComboBoxColumn
Inherits DataGridViewColumn
繼承
Object
DataGridViewElement
DataGridViewBand
DataGridViewColumn
DataGridViewComboBoxColumn
屬性
ToolboxBitmapAttribute

範例

下列程式碼範例示範如何使用 DataGridViewComboBoxColumn 來協助將資料輸入資料行 TitleOfCourtesy 。

#using <System.Data.dll>
#using <System.Windows.Forms.dll>
#using <System.dll>
#using <System.Drawing.dll>

#using <System.Xml.dll>
#using <System.EnterpriseServices.dll>
#using <System.Transactions.dll>
using namespace System;
using namespace System::Data;
using namespace System::Data::SqlClient;
using namespace System::Windows::Forms;
using namespace System::Collections::Generic;
using namespace System::Drawing;

public ref class Employees : public Form
{
private:
    DataGridView^ DataGridView1;

private:
    DataGridView^ DataGridView2;

public:
    [STAThread]
    static void Main()
    {
        try
        {
            Application::EnableVisualStyles();
            Application::Run(gcnew Employees());
        }
        catch (Exception^ e)
        {
            MessageBox::Show(e->Message + e->StackTrace);
        }
    }

private:
    Dictionary<String^, bool>^ inOffice;

public:
    Employees()
    {
        DataGridView1 = gcnew DataGridView();
        DataGridView2 = gcnew DataGridView();
        connectionString =
            "Integrated Security=SSPI;Persist Security Info=False;" +
            "Initial Catalog=Northwind;Data Source=localhost";
        inOffice = gcnew Dictionary<String^, bool>;

        this->Load += gcnew EventHandler(this, &Employees::Form1_Load);
    }

private:
    void Form1_Load(System::Object^ /*sender*/, System::EventArgs^ /*e*/)
    {
        try
        {
            SetUpForm();
            SetUpDataGridView1();
            SetUpDataGridView2();
        }
        catch (SqlException^)
        {
            MessageBox::Show("The connection string <"
                + connectionString
                + "> failed to connect.  Modify it "
                + "to connect to a Northwind database accessible to "
                + "your system.",
                "ERROR", MessageBoxButtons::OK, MessageBoxIcon::Exclamation);
            Application::Exit();
        }
    }

private:
    void SetUpForm()
    {
        Size = System::Drawing::Size(800, 600);
        FlowLayoutPanel^ flowLayout = gcnew FlowLayoutPanel();
        flowLayout->FlowDirection = FlowDirection::TopDown;
        flowLayout->Dock = DockStyle::Fill;
        Controls->Add(flowLayout);

        flowLayout->Controls->Add(DataGridView1);
        flowLayout->Controls->Add(DataGridView2);
    }

private:
    void SetUpDataGridView2()
    {
        DataGridView2->Dock = DockStyle::Bottom;
        DataGridView2->TopLeftHeaderCell->Value = "Sales Details";
        DataGridView2->RowHeadersWidthSizeMode = 
            DataGridViewRowHeadersWidthSizeMode::AutoSizeToAllHeaders;
    }

private:
    void SetUpDataGridView1()
    {
        //DataGridView1.DataError += new 
          //  DataGridViewDataErrorEventHandler(DataGridView1_DataError);
        DataGridView1->CellContentClick += gcnew 
            DataGridViewCellEventHandler(this, &Employees::DataGridView1_CellContentClick);
        DataGridView1->CellValuePushed += gcnew 
            DataGridViewCellValueEventHandler(this, &Employees::DataGridView1_CellValuePushed);
        DataGridView1->CellValueNeeded += gcnew 
            DataGridViewCellValueEventHandler(this, &Employees::DataGridView1_CellValueNeeded);

        // Virtual mode is turned on so that the
        // unbound DataGridViewCheckBoxColumn will
        // keep its state when the bound columns are
        // sorted.       
        DataGridView1->VirtualMode = true;
        DataGridView1->AutoSize = true;
        DataGridView1->DataSource = Populate("SELECT * FROM Employees");
        DataGridView1->TopLeftHeaderCell->Value = "Employees";
        DataGridView1->RowHeadersWidthSizeMode = 
            DataGridViewRowHeadersWidthSizeMode::AutoSizeToAllHeaders;
        DataGridView1->ColumnHeadersHeightSizeMode = 
            DataGridViewColumnHeadersHeightSizeMode::AutoSize;
        DataGridView1->AutoSizeColumnsMode = 
            DataGridViewAutoSizeColumnsMode::AllCells;
        DataGridView1->AllowUserToAddRows = false;
        DataGridView1->AllowUserToDeleteRows = false;

        // The below autogenerated column is removed so 
        // a DataGridViewComboboxColumn could be used instead.
        DataGridView1->Columns->Remove(ColumnName::TitleOfCourtesy.ToString());
        DataGridView1->Columns->Remove(ColumnName::ReportsTo.ToString());

        AddLinkColumn();
        AddComboBoxColumns();
        AddButtonColumn();
        AddOutOfOfficeColumn();
    }

private:
    void AddComboBoxColumns()
    {
        DataGridViewComboBoxColumn^ comboboxColumn;
        comboboxColumn = CreateComboBoxColumn();
        SetAlternateChoicesUsingDataSource(comboboxColumn);
        comboboxColumn->HeaderText = "TitleOfCourtesy (via DataSource property)";
        DataGridView1->Columns->Insert(0, comboboxColumn);

        comboboxColumn = CreateComboBoxColumn();
        SetAlternateChoicesUsingItems(comboboxColumn);
        comboboxColumn->HeaderText = "TitleOfCourtesy (via Items property)";
        // Tack this example column onto the end.
        DataGridView1->Columns->Add(comboboxColumn);
    }

private:
    void AddLinkColumn()
    {
        DataGridViewLinkColumn^ links = gcnew DataGridViewLinkColumn();

        links->UseColumnTextForLinkValue = true;
        links->HeaderText = ColumnName::ReportsTo.ToString();
        links->DataPropertyName = ColumnName::ReportsTo.ToString();
        links->ActiveLinkColor = Color::White;
        links->LinkBehavior = LinkBehavior::SystemDefault;
        links->LinkColor = Color::Blue;
        links->TrackVisitedState = true;
        links->VisitedLinkColor = Color::YellowGreen;

        DataGridView1->Columns->Add(links);
    }

private:
    void SetAlternateChoicesUsingItems(
        DataGridViewComboBoxColumn^ comboboxColumn)
    {
        comboboxColumn->Items->AddRange("Mr.", "Ms.", "Mrs.", "Dr.");
    }

private:
    DataGridViewComboBoxColumn^ CreateComboBoxColumn()
    {
        DataGridViewComboBoxColumn^ column =
            gcnew DataGridViewComboBoxColumn();
        {
            column->DataPropertyName = ColumnName::TitleOfCourtesy.ToString();
            column->HeaderText = ColumnName::TitleOfCourtesy.ToString();
            column->DropDownWidth = 160;
            column->Width = 90;
            column->MaxDropDownItems = 3;
            column->FlatStyle = FlatStyle::Flat;
        }
        return column;
    }

private:
    void SetAlternateChoicesUsingDataSource(DataGridViewComboBoxColumn^ comboboxColumn)
    {
        {
            comboboxColumn->DataSource = RetrieveAlternativeTitles();
            comboboxColumn->ValueMember = ColumnName::TitleOfCourtesy.ToString();
            comboboxColumn->DisplayMember = comboboxColumn->ValueMember;
        }
    }

private:
    DataTable^ RetrieveAlternativeTitles()
    {
        return Populate("SELECT distinct TitleOfCourtesy FROM Employees");
    }

    String^ connectionString;

private:
    DataTable^ Populate(String^ sqlCommand)
    {
        SqlConnection^ northwindConnection = gcnew SqlConnection(connectionString);
        northwindConnection->Open();

        SqlCommand^ command = gcnew SqlCommand(sqlCommand, northwindConnection);
        SqlDataAdapter^ adapter = gcnew SqlDataAdapter();
        adapter->SelectCommand = command;

        DataTable^ table = gcnew DataTable();
        adapter->Fill(table);

        return table;
    }

    // Using an enum provides some abstraction between column index
    // and column name along with compile time checking, and gives
    // a handy place to store the column names.
    enum class ColumnName
    {
        EmployeeID,
        LastName,
        FirstName,
        Title,
        TitleOfCourtesy,
        BirthDate,
        HireDate,
        Address,
        City,
        Region,
        PostalCode,
        Country,
        HomePhone,
        Extension,
        Photo,
        Notes,
        ReportsTo,
        PhotoPath,
        OutOfOffice
    };

private:
    void AddButtonColumn()
    {
        DataGridViewButtonColumn^ buttons = gcnew DataGridViewButtonColumn();
        {
            buttons->HeaderText = "Sales";
            buttons->Text = "Sales";
            buttons->UseColumnTextForButtonValue = true;
            buttons->AutoSizeMode =
                DataGridViewAutoSizeColumnMode::AllCells;
            buttons->FlatStyle = FlatStyle::Standard;
            buttons->CellTemplate->Style->BackColor = Color::Honeydew;
            buttons->DisplayIndex = 0;
        }

        DataGridView1->Columns->Add(buttons);

    }

private:
    void AddOutOfOfficeColumn()
    {
        DataGridViewCheckBoxColumn^ column = gcnew DataGridViewCheckBoxColumn();
        {
            column->HeaderText = ColumnName::OutOfOffice.ToString();
            column->Name = ColumnName::OutOfOffice.ToString();
            column->AutoSizeMode = 
                DataGridViewAutoSizeColumnMode::DisplayedCells;
            column->FlatStyle = FlatStyle::Standard;
            column->ThreeState = true;
            column->CellTemplate = gcnew DataGridViewCheckBoxCell();
            column->CellTemplate->Style->BackColor = Color::Beige;
        }

        DataGridView1->Columns->Insert(0, column);
    }

private:
    void PopulateSales(DataGridViewCellEventArgs^ buttonClick)
    {

        String^ employeeID = DataGridView1->Rows[buttonClick->RowIndex]
            ->Cells[ColumnName::EmployeeID.ToString()]->Value->ToString();
        DataGridView2->DataSource = Populate("SELECT * FROM Orders WHERE EmployeeID = " + employeeID);
    }

    #pragma region "SQL Error handling"
private:
    void DataGridView1_DataError(Object^ sender, DataGridViewDataErrorEventArgs^ anError)
    {

        MessageBox::Show("Error happened " + anError->Context.ToString());

        if (anError->Context == DataGridViewDataErrorContexts::Commit)
        {
            MessageBox::Show("Commit error");
        }
        if (anError->Context == DataGridViewDataErrorContexts::CurrentCellChange)
        {
            MessageBox::Show("Cell change");
        }
        if (anError->Context == DataGridViewDataErrorContexts::Parsing)
        {
            MessageBox::Show("parsing error");
        }
        if (anError->Context == DataGridViewDataErrorContexts::LeaveControl)
        {
            MessageBox::Show("leave control error");
        }

        if (dynamic_cast<ConstraintException^>(anError->Exception) != nullptr)
        {
            DataGridView^ view = (DataGridView^)sender;
            view->Rows[anError->RowIndex]->ErrorText = "an error";
            view->Rows[anError->RowIndex]->Cells[anError->ColumnIndex]->ErrorText = "an error";

            anError->ThrowException = false;
        }
    }
    #pragma endregion

private:
    void DataGridView1_CellContentClick(Object^ /*sender*/, DataGridViewCellEventArgs^ e)
    {

        if (IsANonHeaderLinkCell(e))
        {
            MoveToLinked(e);
        }
        else if (IsANonHeaderButtonCell(e))
        {
            PopulateSales(e);
        }
    }

private:
    void MoveToLinked(DataGridViewCellEventArgs^ e)
    {
        String^ employeeId;
        Object^ value = DataGridView1->Rows[e->RowIndex]->Cells[e->ColumnIndex]->Value;
        if (dynamic_cast<DBNull^>(value) != nullptr) { return; }

        employeeId = value->ToString();
        DataGridViewCell^ boss = RetrieveSuperiorsLastNameCell(employeeId);
        if (boss != nullptr)
        {
            DataGridView1->CurrentCell = boss;
        }
    }

private:
    bool IsANonHeaderLinkCell(DataGridViewCellEventArgs^ cellEvent)
    {
        if (dynamic_cast<DataGridViewLinkColumn^>(DataGridView1->Columns[cellEvent->ColumnIndex]) != nullptr
             &&
            cellEvent->RowIndex != -1)
        { return true; }
        else { return false; }
    }

private:
    bool IsANonHeaderButtonCell(DataGridViewCellEventArgs^ cellEvent)
    {
        if (dynamic_cast<DataGridViewButtonColumn^>(DataGridView1->Columns[cellEvent->ColumnIndex]) != nullptr
             &&
            cellEvent->RowIndex != -1)
        { return true; }
        else { return (false); }
    }

private:
    DataGridViewCell^ RetrieveSuperiorsLastNameCell(String^ employeeId)
    {

        for each (DataGridViewRow^ row in DataGridView1->Rows)
        {
            if (row->IsNewRow) { return nullptr; }
            if (row->Cells[ColumnName::EmployeeID.ToString()]->Value->ToString()->Equals(employeeId))
            {
                return row->Cells[ColumnName::LastName.ToString()];
            }
        }
        return nullptr;
    }

    #pragma region "checkbox state"

private:
    void DataGridView1_CellValuePushed(Object^ sender,
        DataGridViewCellValueEventArgs^ e)
    {
        if (IsCheckBoxColumn(e->ColumnIndex))
        {
            String^ employeeId = GetKey(e);
            if (!inOffice->ContainsKey(employeeId))
            {
                inOffice->Add(employeeId, (Boolean)e->Value);
            }
            else
            {
                inOffice[employeeId] = (Boolean)e->Value;
            }
        }
    }

private:
    String^ GetKey(DataGridViewCellValueEventArgs^ cell)
    {
        return DataGridView1->Rows[cell->RowIndex]->
            Cells[ColumnName::EmployeeID.ToString()]->Value->ToString();
    }

private:
    void DataGridView1_CellValueNeeded(Object^ sender,
        DataGridViewCellValueEventArgs^ e)
    {

        if (IsCheckBoxColumn(e->ColumnIndex))
        {
            String^ employeeId = GetKey(e);
            if (!inOffice->ContainsKey(employeeId))
            {
                bool defaultValue = false;
                inOffice->Add(employeeId, defaultValue);
            }

            e->Value = inOffice[employeeId];
        }
    }

private:
    bool IsCheckBoxColumn(int columnIndex)
    {
        DataGridViewColumn^ outOfOfficeColumn =
            DataGridView1->Columns[ColumnName::OutOfOffice.ToString()];
        return (DataGridView1->Columns[columnIndex] == outOfOfficeColumn);
    }
    #pragma endregion
};

int main()
{
    Employees::Main();
}

using System;
using System.Data;
using System.Data.SqlClient;
using System.Windows.Forms;
using System.Collections.Generic;
using System.Drawing;

public class Employees : Form
{
    private DataGridView DataGridView1 = new DataGridView();
    private DataGridView DataGridView2 = new DataGridView();

    [STAThread]
    public static void Main()
    {
        try
        {
            Application.EnableVisualStyles();
            Application.Run(new Employees());
        }
        catch (Exception e)
        {
            MessageBox.Show(e.Message + e.StackTrace);
        }
    }

    public Employees()
    {
        this.Load += new EventHandler(Form1_Load);
    }

    private void Form1_Load(System.Object sender, System.EventArgs e)
    {
        try
        {
            SetUpForm();
            SetUpDataGridView1();
            SetUpDataGridView2();
        }
        catch (SqlException)
        {
            MessageBox.Show("The connection string <"
                + connectionString
                + "> failed to connect.  Modify it "
                + "to connect to a Northwind database accessible to "
                + "your system.",
                "ERROR", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
            Application.Exit();
        }
    }

    private void SetUpForm()
    {
        Size = new Size(800, 600);
        FlowLayoutPanel flowLayout = new FlowLayoutPanel();
        flowLayout.FlowDirection = FlowDirection.TopDown;
        flowLayout.Dock = DockStyle.Fill;
        Controls.Add(flowLayout);
        Text = "DataGridView columns demo";

        flowLayout.Controls.Add(DataGridView1);
        flowLayout.Controls.Add(DataGridView2);
    }

    private void SetUpDataGridView2()
    {
        DataGridView2.Dock = DockStyle.Bottom;
        DataGridView2.TopLeftHeaderCell.Value = "Sales Details";
        DataGridView2.RowHeadersWidthSizeMode = 
            DataGridViewRowHeadersWidthSizeMode.AutoSizeToAllHeaders;
    }

    private void SetUpDataGridView1()
    {
        DataGridView1.DataError += new 
            DataGridViewDataErrorEventHandler(DataGridView1_DataError);
        DataGridView1.CellContentClick += new 
            DataGridViewCellEventHandler(DataGridView1_CellContentClick);
        DataGridView1.CellValuePushed += new 
            DataGridViewCellValueEventHandler(DataGridView1_CellValuePushed);
        DataGridView1.CellValueNeeded += new 
            DataGridViewCellValueEventHandler(DataGridView1_CellValueNeeded);

        // Virtual mode is turned on so that the
        // unbound DataGridViewCheckBoxColumn will
        // keep its state when the bound columns are
        // sorted.       
        DataGridView1.VirtualMode = true;
        DataGridView1.AutoSize = true;
        DataGridView1.DataSource = Populate("SELECT * FROM Employees");
        DataGridView1.TopLeftHeaderCell.Value = "Employees";
        DataGridView1.RowHeadersWidthSizeMode = 
            DataGridViewRowHeadersWidthSizeMode.AutoSizeToAllHeaders;
        DataGridView1.ColumnHeadersHeightSizeMode = 
            DataGridViewColumnHeadersHeightSizeMode.AutoSize;
        DataGridView1.AutoSizeColumnsMode = 
            DataGridViewAutoSizeColumnsMode.AllCells;
        DataGridView1.AllowUserToAddRows = false;
        DataGridView1.AllowUserToDeleteRows = false;

        // The below autogenerated column is removed so 
        // a DataGridViewComboboxColumn could be used instead.
        DataGridView1.Columns.Remove(ColumnName.TitleOfCourtesy.ToString());
        DataGridView1.Columns.Remove(ColumnName.ReportsTo.ToString());

        AddLinkColumn();
        AddComboBoxColumns();
        AddButtonColumn();
        AddOutOfOfficeColumn();
    }

    private void AddComboBoxColumns()
    {
        DataGridViewComboBoxColumn comboboxColumn;
        comboboxColumn = CreateComboBoxColumn();
        SetAlternateChoicesUsingDataSource(comboboxColumn);
        comboboxColumn.HeaderText = "TitleOfCourtesy (via DataSource property)";
        DataGridView1.Columns.Insert(0, comboboxColumn);

        comboboxColumn = CreateComboBoxColumn();
        SetAlternateChoicesUsingItems(comboboxColumn);
        comboboxColumn.HeaderText = "TitleOfCourtesy (via Items property)";
        // Tack this example column onto the end.
        DataGridView1.Columns.Add(comboboxColumn);
    }

    private void AddLinkColumn()
    {
        DataGridViewLinkColumn links = new DataGridViewLinkColumn();

        links.UseColumnTextForLinkValue = true;
        links.HeaderText = ColumnName.ReportsTo.ToString();
        links.DataPropertyName = ColumnName.ReportsTo.ToString();
        links.ActiveLinkColor = Color.White;
        links.LinkBehavior = LinkBehavior.SystemDefault;
        links.LinkColor = Color.Blue;
        links.TrackVisitedState = true;
        links.VisitedLinkColor = Color.YellowGreen;

        DataGridView1.Columns.Add(links);
    }

    private static void SetAlternateChoicesUsingItems(
        DataGridViewComboBoxColumn comboboxColumn)
    {
        comboboxColumn.Items.AddRange("Mr.", "Ms.", "Mrs.", "Dr.");
    }

    private DataGridViewComboBoxColumn CreateComboBoxColumn()
    {
        DataGridViewComboBoxColumn column =
            new DataGridViewComboBoxColumn();
        {
            column.DataPropertyName = ColumnName.TitleOfCourtesy.ToString();
            column.HeaderText = ColumnName.TitleOfCourtesy.ToString();
            column.DropDownWidth = 160;
            column.Width = 90;
            column.MaxDropDownItems = 3;
            column.FlatStyle = FlatStyle.Flat;
        }
        return column;
    }

    private void SetAlternateChoicesUsingDataSource(DataGridViewComboBoxColumn comboboxColumn)
    {
        {
            comboboxColumn.DataSource = RetrieveAlternativeTitles();
            comboboxColumn.ValueMember = ColumnName.TitleOfCourtesy.ToString();
            comboboxColumn.DisplayMember = comboboxColumn.ValueMember;
        }
    }

    private DataTable RetrieveAlternativeTitles()
    {
        return Populate("SELECT distinct TitleOfCourtesy FROM Employees");
    }

    string connectionString =
        "Integrated Security=SSPI;Persist Security Info=False;" +
        "Initial Catalog=Northwind;Data Source=localhost";

    private DataTable Populate(string sqlCommand)
    {
        SqlConnection northwindConnection = new SqlConnection(connectionString);
        northwindConnection.Open();

        SqlCommand command = new SqlCommand(sqlCommand, northwindConnection);
        SqlDataAdapter adapter = new SqlDataAdapter();
        adapter.SelectCommand = command;

        DataTable table = new DataTable();
        table.Locale = System.Globalization.CultureInfo.InvariantCulture;
        adapter.Fill(table);

        return table;
    }

    // Using an enum provides some abstraction between column index
    // and column name along with compile time checking, and gives
    // a handy place to store the column names.
    enum ColumnName
    {
        EmployeeId,
        LastName,
        FirstName,
        Title,
        TitleOfCourtesy,
        BirthDate,
        HireDate,
        Address,
        City,
        Region,
        PostalCode,
        Country,
        HomePhone,
        Extension,
        Photo,
        Notes,
        ReportsTo,
        PhotoPath,
        OutOfOffice
    };

    private void AddButtonColumn()
    {
        DataGridViewButtonColumn buttons = new DataGridViewButtonColumn();
        {
            buttons.HeaderText = "Sales";
            buttons.Text = "Sales";
            buttons.UseColumnTextForButtonValue = true;
            buttons.AutoSizeMode =
                DataGridViewAutoSizeColumnMode.AllCells;
            buttons.FlatStyle = FlatStyle.Standard;
            buttons.CellTemplate.Style.BackColor = Color.Honeydew;
            buttons.DisplayIndex = 0;
        }

        DataGridView1.Columns.Add(buttons);
    }

    private void AddOutOfOfficeColumn()
    {
        DataGridViewCheckBoxColumn column = new DataGridViewCheckBoxColumn();
        {
            column.HeaderText = ColumnName.OutOfOffice.ToString();
            column.Name = ColumnName.OutOfOffice.ToString();
            column.AutoSizeMode = 
                DataGridViewAutoSizeColumnMode.DisplayedCells;
            column.FlatStyle = FlatStyle.Standard;
            column.ThreeState = true;
            column.CellTemplate = new DataGridViewCheckBoxCell();
            column.CellTemplate.Style.BackColor = Color.Beige;
        }

        DataGridView1.Columns.Insert(0, column);
    }

    private void PopulateSales(DataGridViewCellEventArgs buttonClick)
    {

        string employeeId = DataGridView1.Rows[buttonClick.RowIndex]
            .Cells[ColumnName.EmployeeId.ToString()].Value.ToString();
        DataGridView2.DataSource = Populate("SELECT * FROM Orders WHERE EmployeeId = " + employeeId);
    }

    #region "SQL Error handling"
    private void DataGridView1_DataError(object sender, DataGridViewDataErrorEventArgs anError)
    {

        MessageBox.Show("Error happened " + anError.Context.ToString());

        if (anError.Context == DataGridViewDataErrorContexts.Commit)
        {
            MessageBox.Show("Commit error");
        }
        if (anError.Context == DataGridViewDataErrorContexts.CurrentCellChange)
        {
            MessageBox.Show("Cell change");
        }
        if (anError.Context == DataGridViewDataErrorContexts.Parsing)
        {
            MessageBox.Show("parsing error");
        }
        if (anError.Context == DataGridViewDataErrorContexts.LeaveControl)
        {
            MessageBox.Show("leave control error");
        }

        if ((anError.Exception) is ConstraintException)
        {
            DataGridView view = (DataGridView)sender;
            view.Rows[anError.RowIndex].ErrorText = "an error";
            view.Rows[anError.RowIndex].Cells[anError.ColumnIndex].ErrorText = "an error";

            anError.ThrowException = false;
        }
    }
    #endregion

    private void DataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
    {

        if (IsANonHeaderLinkCell(e))
        {
            MoveToLinked(e);
        }
        else if (IsANonHeaderButtonCell(e))
        {
            PopulateSales(e);
        }
    }

    private void MoveToLinked(DataGridViewCellEventArgs e)
    {
        string employeeId;
        object value = DataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex].Value;
        if (value is DBNull) { return; }

        employeeId = value.ToString();
        DataGridViewCell boss = RetrieveSuperiorsLastNameCell(employeeId);
        if (boss != null)
        {
            DataGridView1.CurrentCell = boss;
        }
    }

    private bool IsANonHeaderLinkCell(DataGridViewCellEventArgs cellEvent)
    {
        if (DataGridView1.Columns[cellEvent.ColumnIndex] is
            DataGridViewLinkColumn &&
            cellEvent.RowIndex != -1)
        { return true; }
        else { return false; }
    }

    private bool IsANonHeaderButtonCell(DataGridViewCellEventArgs cellEvent)
    {
        if (DataGridView1.Columns[cellEvent.ColumnIndex] is
            DataGridViewButtonColumn &&
            cellEvent.RowIndex != -1)
        { return true; }
        else { return (false); }
    }

    private DataGridViewCell RetrieveSuperiorsLastNameCell(string employeeId)
    {

        foreach (DataGridViewRow row in DataGridView1.Rows)
        {
            if (row.IsNewRow) { return null; }
            if (row.Cells[ColumnName.EmployeeId.ToString()].Value.ToString().Equals(employeeId))
            {
                return row.Cells[ColumnName.LastName.ToString()];
            }
        }
        return null;
    }

    #region "checkbox state"
    Dictionary<string, bool> inOffice = new Dictionary<string, bool>();
    private void DataGridView1_CellValuePushed(object sender,
        DataGridViewCellValueEventArgs e)
    {
        if (IsCheckBoxColumn(e.ColumnIndex))
        {
            string employeeId = GetKey(e);
            if (!inOffice.ContainsKey(employeeId))
            {
                inOffice.Add(employeeId, (Boolean)e.Value);
            }
            else
            {
                inOffice[employeeId] = (Boolean)e.Value;
            }
        }
    }

    private string GetKey(DataGridViewCellValueEventArgs cell)
    {
        return DataGridView1.Rows[cell.RowIndex].
            Cells[ColumnName.EmployeeId.ToString()].Value.ToString();
    }

    private void DataGridView1_CellValueNeeded(object sender,
        DataGridViewCellValueEventArgs e)
    {

        if (IsCheckBoxColumn(e.ColumnIndex))
        {
            string employeeId = GetKey(e);
            if (!inOffice.ContainsKey(employeeId))
            {
                bool defaultValue = false;
                inOffice.Add(employeeId, defaultValue);
            }

            e.Value = inOffice[employeeId];
        }
    }

    private bool IsCheckBoxColumn(int columnIndex)
    {
        DataGridViewColumn outOfOfficeColumn =
            DataGridView1.Columns[ColumnName.OutOfOffice.ToString()];
        return (DataGridView1.Columns[columnIndex] == outOfOfficeColumn);
    }
    #endregion
}

Imports System.Data
Imports System.Data.SqlClient
Imports System.Windows.Forms
Imports System.Collections.Generic
Imports System.Drawing

Public Class Employees
    Inherits System.Windows.Forms.Form

    Private WithEvents DataGridView1 As New DataGridView
    Private WithEvents DataGridView2 As New DataGridView

    <STAThreadAttribute()> _
    Public Shared Sub Main()
        Try
            Application.EnableVisualStyles()
            Application.Run(New Employees())
        Catch e As Exception
            MessageBox.Show(e.Message & e.StackTrace)
        End Try
    End Sub

    Private Sub Form1_Load(ByVal sender As System.Object, _
        ByVal e As System.EventArgs) Handles MyBase.Load

        Try
            SetUpForm()
            SetUpDataGridView1()
            SetUpDataGridView2()
        Catch ex As SqlException
            MessageBox.Show("The connection string <" _
                & connectionString _
                & "> failed to connect.  Modify it to connect to " _
                & "a Northwind database accessible to your system.", _
                "ERROR", MessageBoxButtons.OK, MessageBoxIcon.Exclamation)
            Application.Exit()
        End Try
    End Sub

    Private Sub SetUpForm()
        Size = New Size(800, 600)
        Dim flowLayout As New FlowLayoutPanel()
        flowLayout.FlowDirection = FlowDirection.TopDown
        flowLayout.Dock = DockStyle.Fill
        Controls.Add(flowLayout)
        Text = "DataGridView columns demo"

        flowLayout.Controls.Add(DataGridView1)
        flowLayout.Controls.Add(DataGridView2)
    End Sub

    Private Sub SetUpDataGridView2()
        DataGridView2.Dock = DockStyle.Bottom
        DataGridView2.TopLeftHeaderCell.Value = "Sales Details"
        DataGridView2.RowHeadersWidthSizeMode = _
        DataGridViewRowHeadersWidthSizeMode.AutoSizeToAllHeaders
    End Sub

    Private Sub SetUpDataGridView1()
        ' Virtual mode is turned on so that the
        ' unbound DataGridViewCheckBoxColumn will
        ' keep its state when the bound columns are
        ' sorted.
        DataGridView1.VirtualMode = True

        DataGridView1.AutoSize = True
        DataGridView1.DataSource = _
            Populate("SELECT * FROM Employees")
        DataGridView1.TopLeftHeaderCell.Value = "Employees"
        DataGridView1.RowHeadersWidthSizeMode = _
            DataGridViewRowHeadersWidthSizeMode.AutoSizeToAllHeaders
        DataGridView1.ColumnHeadersHeightSizeMode = _
            DataGridViewColumnHeadersHeightSizeMode.AutoSize
        DataGridView1.AutoSizeColumnsMode = _
            DataGridViewAutoSizeColumnsMode.AllCells
        DataGridView1.AllowUserToAddRows = False
        DataGridView1.AllowUserToDeleteRows = False

        ' The below autogenerated column is removed so 
        ' a DataGridViewComboboxColumn could be used instead.
        DataGridView1.Columns.Remove( _
            ColumnName.TitleOfCourtesy.ToString())
        DataGridView1.Columns.Remove(ColumnName.ReportsTo.ToString())

        AddLinkColumn()
        AddComboBoxColumns()
        AddButtonColumn()
        AddOutOfOfficeColumn()
    End Sub

    Private Sub AddComboBoxColumns()
        Dim comboboxColumn As DataGridViewComboBoxColumn
        comboboxColumn = CreateComboBoxColumn()
        SetAlternateChoicesUsingDataSource(comboboxColumn)
        comboboxColumn.HeaderText = _
            "TitleOfCourtesy (via DataSource property)"
        DataGridView1.Columns.Insert(0, comboboxColumn)

        comboboxColumn = CreateComboBoxColumn()
        SetAlternateChoicesUsingItems(comboboxColumn)
        comboboxColumn.HeaderText = _
            "TitleOfCourtesy (via Items property)"
        ' Tack this example column onto the end.
        DataGridView1.Columns.Add(comboboxColumn)
    End Sub

    Private Sub AddLinkColumn()

        Dim links As New DataGridViewLinkColumn()
        With links
            .UseColumnTextForLinkValue = True
            .HeaderText = ColumnName.ReportsTo.ToString()
            .DataPropertyName = ColumnName.ReportsTo.ToString()
            .ActiveLinkColor = Color.White
            .LinkBehavior = LinkBehavior.SystemDefault
            .LinkColor = Color.Blue
            .TrackVisitedState = True
            .VisitedLinkColor = Color.YellowGreen
        End With
        DataGridView1.Columns.Add(links)
    End Sub

    Private Shared Sub SetAlternateChoicesUsingItems( _
        ByVal comboboxColumn As DataGridViewComboBoxColumn)

        comboboxColumn.Items.AddRange("Mr.", "Ms.", "Mrs.", "Dr.")

    End Sub

    Private Function CreateComboBoxColumn() _
        As DataGridViewComboBoxColumn
        Dim column As New DataGridViewComboBoxColumn()

        With column
            .DataPropertyName = ColumnName.TitleOfCourtesy.ToString()
            .HeaderText = ColumnName.TitleOfCourtesy.ToString()
            .DropDownWidth = 160
            .Width = 90
            .MaxDropDownItems = 3
            .FlatStyle = FlatStyle.Flat
        End With
        Return column
    End Function

    Private Sub SetAlternateChoicesUsingDataSource( _
        ByVal comboboxColumn As DataGridViewComboBoxColumn)
        With comboboxColumn
            .DataSource = RetrieveAlternativeTitles()
            .ValueMember = ColumnName.TitleOfCourtesy.ToString()
            .DisplayMember = .ValueMember
        End With
    End Sub

    Private Function RetrieveAlternativeTitles() As DataTable
        Return Populate( _
            "SELECT distinct TitleOfCourtesy FROM Employees")
    End Function

    Private connectionString As String = _
            "Integrated Security=SSPI;Persist Security Info=False;" _
            & "Initial Catalog=Northwind;Data Source=localhost"

    Private Function Populate(ByVal sqlCommand As String) As DataTable
        Dim northwindConnection As New SqlConnection(connectionString)
        northwindConnection.Open()

        Dim command As New SqlCommand(sqlCommand, _
            northwindConnection)
        Dim adapter As New SqlDataAdapter()
        adapter.SelectCommand = command
        Dim table As New DataTable()
        table.Locale = System.Globalization.CultureInfo.InvariantCulture
        adapter.Fill(table)

        Return table
    End Function

    ' Using an enum provides some abstraction between column index
    ' and column name along with compile time checking, and gives
    ' a handy place to store the column names.
    Enum ColumnName
        EmployeeId
        LastName
        FirstName
        Title
        TitleOfCourtesy
        BirthDate
        HireDate
        Address
        City
        Region
        PostalCode
        Country
        HomePhone
        Extension
        Photo
        Notes
        ReportsTo
        PhotoPath
        OutOfOffice
    End Enum

    Private Sub AddButtonColumn()
        Dim buttons As New DataGridViewButtonColumn()
        With buttons
            .HeaderText = "Sales"
            .Text = "Sales"
            .UseColumnTextForButtonValue = True
            .AutoSizeMode = DataGridViewAutoSizeColumnMode.DisplayedCells
            .FlatStyle = FlatStyle.Standard
            .CellTemplate.Style.BackColor = Color.Honeydew
            .DisplayIndex = 0
        End With

        DataGridView1.Columns.Add(buttons)

    End Sub

    Private Sub AddOutOfOfficeColumn()
        Dim column As New DataGridViewCheckBoxColumn()
        With column
            .HeaderText = ColumnName.OutOfOffice.ToString()
            .Name = ColumnName.OutOfOffice.ToString()
            .AutoSizeMode = DataGridViewAutoSizeColumnMode.DisplayedCells
            .FlatStyle = FlatStyle.Standard
            .CellTemplate = New DataGridViewCheckBoxCell()
            .CellTemplate.Style.BackColor = Color.Beige
        End With

        DataGridView1.Columns.Insert(0, column)
    End Sub

    Private Sub PopulateSales( _
        ByVal buttonClick As DataGridViewCellEventArgs)

        Dim employeeId As String = _
            DataGridView1.Rows(buttonClick.RowIndex). _
            Cells(ColumnName.EmployeeId.ToString()).Value().ToString()
        DataGridView2.DataSource = Populate( _
            "SELECT * FROM Orders WHERE EmployeeId = " & employeeId)
    End Sub

#Region "SQL Error handling"
    Private Sub DataGridView1_DataError(ByVal sender As Object, _
    ByVal e As DataGridViewDataErrorEventArgs) _
    Handles DataGridView1.DataError

        MessageBox.Show("Error happened " _
            & e.Context.ToString())

        If (e.Context = DataGridViewDataErrorContexts.Commit) _
            Then
            MessageBox.Show("Commit error")
        End If
        If (e.Context = DataGridViewDataErrorContexts _
            .CurrentCellChange) Then
            MessageBox.Show("Cell change")
        End If
        If (e.Context = DataGridViewDataErrorContexts.Parsing) _
            Then
            MessageBox.Show("parsing error")
        End If
        If (e.Context = _
            DataGridViewDataErrorContexts.LeaveControl) Then
            MessageBox.Show("leave control error")
        End If

        If (TypeOf (e.Exception) Is ConstraintException) Then
            Dim view As DataGridView = CType(sender, DataGridView)
            view.Rows(e.RowIndex).ErrorText = "an error"
            view.Rows(e.RowIndex).Cells(e.ColumnIndex) _
                .ErrorText = "an error"

            e.ThrowException = False
        End If
    End Sub
#End Region

    Private Sub DataGridView1_CellContentClick(ByVal sender As Object, _
        ByVal e As DataGridViewCellEventArgs) _
        Handles DataGridView1.CellContentClick

        If IsANonHeaderLinkCell(e) Then
            MoveToLinked(e)
        ElseIf IsANonHeaderButtonCell(e) Then
            PopulateSales(e)
        End If
    End Sub

    Private Sub MoveToLinked(ByVal e As DataGridViewCellEventArgs)
        Dim employeeId As String
        Dim value As Object = DataGridView1.Rows(e.RowIndex). _
            Cells(e.ColumnIndex).Value
        If value.GetType Is GetType(DBNull) Then Return

        employeeId = CType(value, String)
        Dim boss As DataGridViewCell = _
            RetrieveSuperiorsLastNameCell(employeeId)
        If boss IsNot Nothing Then
            DataGridView1.CurrentCell = boss
        End If
    End Sub

    Private Function IsANonHeaderLinkCell(ByVal cellEvent As _
        DataGridViewCellEventArgs) As Boolean

        If TypeOf DataGridView1.Columns(cellEvent.ColumnIndex) _
            Is DataGridViewLinkColumn _
            AndAlso Not cellEvent.RowIndex = -1 Then _
            Return True Else Return False

    End Function

    Private Function IsANonHeaderButtonCell(ByVal cellEvent As _
        DataGridViewCellEventArgs) As Boolean

        If TypeOf DataGridView1.Columns(cellEvent.ColumnIndex) _
            Is DataGridViewButtonColumn _
            AndAlso Not cellEvent.RowIndex = -1 Then _
            Return True Else Return (False)

    End Function

    Private Function RetrieveSuperiorsLastNameCell( _
        ByVal employeeId As String) As DataGridViewCell

        For Each row As DataGridViewRow In DataGridView1.Rows
            If row.IsNewRow Then Return Nothing
            If row.Cells(ColumnName.EmployeeId.ToString()). _
                Value.ToString().Equals(employeeId) Then
                Return row.Cells(ColumnName.LastName.ToString())
            End If
        Next
        Return Nothing
    End Function

#Region "checkbox state"
    Dim inOffice As New Dictionary(Of String, Boolean)
    Private Sub DataGridView1_CellValuePushed(ByVal sender As Object, _
     ByVal e As DataGridViewCellValueEventArgs) _
        Handles DataGridView1.CellValuePushed

        If IsCheckBoxColumn(e.ColumnIndex) Then
            Dim employeeId As String = GetKey(e)
            If Not inOffice.ContainsKey(employeeId) Then
                inOffice.Add(employeeId, CType(e.Value, Boolean))
            Else
                inOffice.Item(employeeId) = CType(e.Value, Boolean)
            End If
        End If
    End Sub

    Private Function GetKey(ByVal cell As DataGridViewCellValueEventArgs) As String
        Return DataGridView1.Rows(cell.RowIndex).Cells( _
            ColumnName.EmployeeId.ToString()).Value().ToString()
    End Function

    Private Sub DataGridView1_CellValueNeeded(ByVal sender As Object, _
     ByVal e As DataGridViewCellValueEventArgs) _
        Handles DataGridView1.CellValueNeeded

        If IsCheckBoxColumn(e.ColumnIndex) Then
            Dim employeeId As String = GetKey(e)
            If Not inOffice.ContainsKey(employeeId) Then
                Dim defaultValue As Boolean = False
                inOffice.Add(employeeId, defaultValue)
            End If

            e.Value = inOffice.Item(employeeId)
        End If
    End Sub

    Private Function IsCheckBoxColumn(ByVal columnIndex As Integer) As Boolean

        Dim outOfOfficeColumn As DataGridViewColumn = _
            DataGridView1.Columns(ColumnName.OutOfOffice.ToString())
        Return (DataGridView1.Columns(columnIndex) Is outOfOfficeColumn)

    End Function
#End Region

End Class

備註

類別 DataGridViewComboBoxColumn 是特製化的 類型， DataGridViewColumn 可用來以邏輯方式裝載儲存格，讓使用者從挑選清單中選取值。 DataGridViewComboBoxColumn在與它交集的每個 DataGridViewRow 中都有相關聯的 DataGridViewComboBoxCell 。

您可以藉由設定儲存格的屬性來手動填入資料 Value 格。 或者，您可以將資料行系結至 屬性所指示的 DataGridView.DataSource 資料來源。 DataGridView如果 系結至資料庫資料表，請將資料 DataPropertyName 行屬性設定為數據表中資料行的名稱。 DataGridView如果 系結至 物件的集合，請將 DataPropertyName 屬性設定為物件屬性的名稱。

您可以將值新增至 Items 集合，以手動填入資料行下拉式清單。 或者，您可以藉由設定資料行 DataSource 屬性，將下拉式清單系結至自己的資料來源。 如果值是集合中的物件或資料庫資料表中的記錄，您也必須設定 DisplayMember 和 ValueMember 屬性。 屬性 DisplayMember 會指出哪些物件屬性或資料庫資料行提供下拉式清單中顯示的值。 屬性 ValueMember 會指出使用哪一個物件屬性或資料庫資料行來設定儲存格 Value 屬性。

其中一個典型的案例是將 DataGridView 控制項系結至父資料庫資料表，並將下拉式清單系結至相關的子資料工作表。 例如，您可以將 控制項系結至包含資料行的資料表，並將資料行 DataSource 屬性設定為 Products 包含 和 ProductName 資料行的 ProductID 資料表。 ProductIDOrdersDataGridView 在此情況下，您會將資料行 DataPropertyName 屬性設定為 「ProductID」，以從 Orders.ProductID 資料行填入其儲存格值。 不過，若要在儲存格和下拉式清單中顯示實際產品名稱，您可以將屬性設定為 「ProductID」 並將 屬性設定 ValueMember 為 「ProductName」 DisplayMember ，將這些值對應至 Products 資料表。

下拉式清單值 (或屬性所指出 ValueMember 的值) 必須包含實際的儲存格值，否則 DataGridView 控制項會擲回例外狀況。

設定資料行 DataSource 、 DisplayMember 和 ValueMember 屬性會自動設定資料行中所有儲存格的對應屬性，包括 CellTemplate 。 若要覆寫特定儲存格的這些屬性值，請先設定資料行屬性，然後設定儲存格屬性。

ComboBox不同于 控制項， DataGridViewComboBoxCell 沒有 SelectedIndex 和 SelectedValue 屬性。 相反地，從下拉式清單中選取值會設定儲存格 Value 屬性。

此資料行類型的預設排序模式為 NotSortable 。

給繼承者的注意事項

當您衍生自 DataGridViewComboBoxColumn 並將新屬性新增至衍生類別時，請務必覆寫 Clone() 方法，以在複製作業期間複製新屬性。 您也應該呼叫基類的 Clone() 方法，以便基類的屬性複製到新的儲存格。

建構函式

DataGridViewComboBoxColumn()

初始化 DataGridViewTextBoxColumn 類別的新執行個體為預設狀態。

屬性

AutoComplete

取得或設定值，指出資料行中的儲存格是否會符合輸入具有一個可能選項的儲存格中的字元。
AutoSizeMode

取得或設定資料行自動調整其寬度所根據的模式。

(繼承來源 DataGridViewColumn)
CellTemplate

取得或設定用來建立儲存格的樣板。
CellType

取得儲存格樣板的執行階段類型。

(繼承來源 DataGridViewColumn)
ContextMenuStrip

取得或設定資料行的捷徑功能表。

(繼承來源 DataGridViewColumn)
DataGridView

取得與這個項目有關聯的 DataGridView 控制項。

(繼承來源 DataGridViewElement)
DataPropertyName

取得或設定 DataGridViewColumn 所繫結的資料來源屬性或資料庫資料行的名稱。

(繼承來源 DataGridViewColumn)
DataSource

取得或設定可填入下拉式方塊選擇的資料來源。
DefaultCellStyle

取得或設定資料行的預設儲存格樣式。

(繼承來源 DataGridViewColumn)
DefaultHeaderCellType

取得或設定預設標題儲存格的執行階段型別。

(繼承來源 DataGridViewBand)
Displayed

取得值，指出此群組列目前是否顯示在螢幕上。

(繼承來源 DataGridViewBand)
DisplayIndex

取得或設定相對於目前所顯示之資料行的資料行顯示順序。

(繼承來源 DataGridViewColumn)
DisplayMember

取得或設定字串，此字串指定要從中擷取字串來顯示於下拉式方塊中的屬性或資料行。
DisplayStyle

取得或設定值，這個值可判斷當不進行編輯時，要如何顯示此下拉式方塊。
DisplayStyleForCurrentCellOnly

取得或設定值，指出當目前的儲存格位於這個資料行時，DisplayStyle 屬性值是否僅套用至 DataGridView 控制項中目前的儲存格。
DividerWidth

取得或設定資料行分割線的寬度 (以像素為單位)。

(繼承來源 DataGridViewColumn)
DropDownWidth

取得或設定下拉式方塊的下拉式清單的寬度。
FillWeight

取得或設定值，表示處於填入模式中的資料行寬度，相對於控制項中處於填入模式的資料行寬度。

(繼承來源 DataGridViewColumn)
FlatStyle

取得或設定資料行的儲存格之平面樣式外觀。
Frozen

取得或設定值，指出當使用者水平捲動 DataGridView 控制項時，資料行是否會跟著移動。

(繼承來源 DataGridViewColumn)
HasDefaultCellStyle

取得指出是否已經設定 DefaultCellStyle 屬性的值。

(繼承來源 DataGridViewBand)
HeaderCell

取得或設定表示資料行行首的 DataGridViewColumnHeaderCell。

(繼承來源 DataGridViewColumn)
HeaderCellCore

取得或設定 DataGridViewBand 的標題儲存格。

(繼承來源 DataGridViewBand)
HeaderText

取得或設定資料行行首儲存格上的標題文字。

(繼承來源 DataGridViewColumn)
Index

取得 DataGridView 控制項內群組列的相對位置。

(繼承來源 DataGridViewBand)
InheritedAutoSizeMode

取得資料行的作用中調整大小模式。

(繼承來源 DataGridViewColumn)
InheritedStyle

取得目前套用至資料行的儲存格樣式。

(繼承來源 DataGridViewColumn)
IsDataBound

取得值指出資料行是否繫結至資料來源。

(繼承來源 DataGridViewColumn)
IsRow

取得值，指出群組列是否表示資料列。

(繼承來源 DataGridViewBand)
Items

取得當做下拉式方塊中的選項使用的物件集合。
MaxDropDownItems

取得或設定資料行中的儲存格之下拉式清單內的最大項目數。
MinimumWidth

取得或設定資料行的最小寬度 (以像素為單位)。

(繼承來源 DataGridViewColumn)
Name

取得或設定資料行的名稱。

(繼承來源 DataGridViewColumn)
ReadOnly

取得或設定值，指出使用者是否可以編輯資料行的儲存格。

(繼承來源 DataGridViewColumn)
Resizable

取得或設定值，指出資料行是否可以重新調整大小。

(繼承來源 DataGridViewColumn)
Selected

取得或設定值，指出群組列是否位於已選取的使用者介面 (UI) 狀態下。

(繼承來源 DataGridViewBand)
Site

取得或設定資料行的站台。

(繼承來源 DataGridViewColumn)
Sorted

取得或設定值，指出是否排序下拉式方塊中的項目。
SortMode

取得或設定資料行的排序模式。

(繼承來源 DataGridViewColumn)
State

取得此項目的使用者介面 (UI) 狀態。

(繼承來源 DataGridViewElement)
Tag

取得或設定物件，其中包含與群組列相關的資料。

(繼承來源 DataGridViewBand)
ToolTipText

取得或設定供工具提示使用的文字。

(繼承來源 DataGridViewColumn)
ValueMember

取得或設定字串，此字串指定要從中取得與下拉式清單選項對應的值之屬性或資料行。
ValueType

取得或設定資枓行儲存格中的值之資料類型。

(繼承來源 DataGridViewColumn)
Visible

取得或設定值，這個值指出是否看得到資料行。

(繼承來源 DataGridViewColumn)
Width

取得或設定資料行的目前寬度。

(繼承來源 DataGridViewColumn)

方法

Clone()

建立與這個資料行完全相同的複本。
Dispose()

釋放 DataGridViewBand 所使用的所有資源。

(繼承來源 DataGridViewBand)
Dispose(Boolean)

釋放 DataGridViewBand 所使用的 Unmanaged 資源，並選擇性地釋放 Managed 資源。

(繼承來源 DataGridViewColumn)
Equals(Object)

判斷指定的物件是否等於目前的物件。

(繼承來源 Object)
GetHashCode()

做為預設雜湊函式。

(繼承來源 Object)
GetPreferredWidth(DataGridViewAutoSizeColumnMode, Boolean)

根據指定的準則，計算資料行的理想寬度。

(繼承來源 DataGridViewColumn)
GetType()

取得目前執行個體的 Type。

(繼承來源 Object)
MemberwiseClone()

建立目前 Object 的淺層複製。

(繼承來源 Object)
OnDataGridViewChanged()

當群組列與不同的 DataGridView 產生關聯時呼叫。

(繼承來源 DataGridViewBand)
RaiseCellClick(DataGridViewCellEventArgs)

引發 CellClick 事件。

(繼承來源 DataGridViewElement)
RaiseCellContentClick(DataGridViewCellEventArgs)

引發 CellContentClick 事件。

(繼承來源 DataGridViewElement)
RaiseCellContentDoubleClick(DataGridViewCellEventArgs)

引發 CellContentDoubleClick 事件。

(繼承來源 DataGridViewElement)
RaiseCellValueChanged(DataGridViewCellEventArgs)

引發 CellValueChanged 事件。

(繼承來源 DataGridViewElement)
RaiseDataError(DataGridViewDataErrorEventArgs)

引發 DataError 事件。

(繼承來源 DataGridViewElement)
RaiseMouseWheel(MouseEventArgs)

引發 MouseWheel 事件。

(繼承來源 DataGridViewElement)
ToString()

取得描述資料行的字串。

事件

Disposed

發生於處置 (Dispose) DataGridViewColumn 時。

(繼承來源 DataGridViewColumn)

適用於

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