Udostępnij za pośrednictwem


How to: Create an Unbound Windows Forms DataGridView Control

The following code example demonstrates how to populate a DataGridView control programmatically without binding it to a data source. This is useful when you have a small amount of data that you want to display in a table format.

For a complete explanation of this code example, see Walkthrough: Creating an Unbound Windows Forms DataGridView Control.

Example

Imports System
Imports System.Drawing
Imports System.Windows.Forms

Public Class Form1
    Inherits System.Windows.Forms.Form

    Private buttonPanel As New Panel
    Private WithEvents songsDataGridView As New DataGridView
    Private WithEvents addNewRowButton As New Button
    Private WithEvents deleteRowButton As New Button

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

        SetupLayout()
        SetupDataGridView()
        PopulateDataGridView()

    End Sub 

    Private Sub songsDataGridView_CellFormatting(ByVal sender As Object, _
        ByVal e As System.Windows.Forms.DataGridViewCellFormattingEventArgs) _
        Handles songsDataGridView.CellFormatting

        If e IsNot Nothing Then 

            If Me.songsDataGridView.Columns(e.ColumnIndex).Name = _
            "Release Date" Then 
                If e.Value IsNot Nothing Then 
                    Try
                        e.Value = DateTime.Parse(e.Value.ToString()) _
                            .ToLongDateString()
                        e.FormattingApplied = True 
                    Catch ex As FormatException
                        Console.WriteLine("{0} is not a valid date.", e.Value.ToString())
                    End Try 
                End If 
            End If 

        End If 

    End Sub 

    Private Sub addNewRowButton_Click(ByVal sender As Object, _
        ByVal e As EventArgs) Handles addNewRowButton.Click

        Me.songsDataGridView.Rows.Add()

    End Sub 

    Private Sub deleteRowButton_Click(ByVal sender As Object, _
        ByVal e As EventArgs) Handles deleteRowButton.Click

        If Me.songsDataGridView.SelectedRows.Count > 0 AndAlso _
            Not Me.songsDataGridView.SelectedRows(0).Index = _
            Me.songsDataGridView.Rows.Count - 1 Then 

            Me.songsDataGridView.Rows.RemoveAt( _
                Me.songsDataGridView.SelectedRows(0).Index)

        End If 

    End Sub 

    Private Sub SetupLayout()

        Me.Size = New Size(600, 500)

        With addNewRowButton
            .Text = "Add Row"
            .Location = New Point(10, 10)
        End With 

        With deleteRowButton
            .Text = "Delete Row"
            .Location = New Point(100, 10)
        End With 

        With buttonPanel
            .Controls.Add(addNewRowButton)
            .Controls.Add(deleteRowButton)
            .Height = 50
            .Dock = DockStyle.Bottom
        End With 

        Me.Controls.Add(Me.buttonPanel)

    End Sub 

    Private Sub SetupDataGridView()

        Me.Controls.Add(songsDataGridView)

        songsDataGridView.ColumnCount = 5
        With songsDataGridView.ColumnHeadersDefaultCellStyle
            .BackColor = Color.Navy
            .ForeColor = Color.White
            .Font = New Font(songsDataGridView.Font, FontStyle.Bold)
        End With 

        With songsDataGridView
            .Name = "songsDataGridView"
            .Location = New Point(8, 8)
            .Size = New Size(500, 250)
            .AutoSizeRowsMode = _
                DataGridViewAutoSizeRowsMode.DisplayedCellsExceptHeaders
            .ColumnHeadersBorderStyle = DataGridViewHeaderBorderStyle.Single
            .CellBorderStyle = DataGridViewCellBorderStyle.Single
            .GridColor = Color.Black
            .RowHeadersVisible = False

            .Columns(0).Name = "Release Date"
            .Columns(1).Name = "Track"
            .Columns(2).Name = "Title"
            .Columns(3).Name = "Artist"
            .Columns(4).Name = "Album"
            .Columns(4).DefaultCellStyle.Font = _
                New Font(Me.songsDataGridView.DefaultCellStyle.Font, FontStyle.Italic)

            .SelectionMode = DataGridViewSelectionMode.FullRowSelect
            .MultiSelect = False
            .Dock = DockStyle.Fill
        End With 

    End Sub 

    Private Sub PopulateDataGridView()

        Dim row0 As String() = {"11/22/1968", "29", "Revolution 9", _
            "Beatles", "The Beatles [White Album]"}
        Dim row1 As String() = {"1960", "6", "Fools Rush In", _
            "Frank Sinatra", "Nice 'N' Easy"}
        Dim row2 As String() = {"11/11/1971", "1", "One of These Days", _
            "Pink Floyd", "Meddle"}
        Dim row3 As String() = {"1988", "7", "Where Is My Mind?", _
            "Pixies", "Surfer Rosa"}
        Dim row4 As String() = {"5/1981", "9", "Can't Find My Mind", _
            "Cramps", "Psychedelic Jungle"}
        Dim row5 As String() = {"6/10/2003", "13", _
            "Scatterbrain. (As Dead As Leaves.)", _
            "Radiohead", "Hail to the Thief"}
        Dim row6 As String() = {"6/30/1992", "3", "Dress", "P J Harvey", "Dry"}

        With Me.songsDataGridView.Rows
            .Add(row0)
            .Add(row1)
            .Add(row2)
            .Add(row3)
            .Add(row4)
            .Add(row5)
            .Add(row6)
        End With 

        With Me.songsDataGridView
            .Columns(0).DisplayIndex = 3
            .Columns(1).DisplayIndex = 4
            .Columns(2).DisplayIndex = 0
            .Columns(3).DisplayIndex = 1
            .Columns(4).DisplayIndex = 2
        End With 

    End Sub


    <STAThreadAttribute()> _
    Public Shared Sub Main()
        Application.EnableVisualStyles()
        Application.Run(New Form1())
    End Sub 

End Class
using System;
using System.Drawing;
using System.Windows.Forms;

public class Form1 : System.Windows.Forms.Form
{
    private Panel buttonPanel = new Panel();
    private DataGridView songsDataGridView = new DataGridView();
    private Button addNewRowButton = new Button();
    private Button deleteRowButton = new Button();

    public Form1()
    {
        this.Load += new EventHandler(Form1_Load);
    }

    private void Form1_Load(System.Object sender, System.EventArgs e)
    {
        SetupLayout();
        SetupDataGridView();
        PopulateDataGridView();
    }

    private void songsDataGridView_CellFormatting(object sender,
        System.Windows.Forms.DataGridViewCellFormattingEventArgs e)
    {
        if (e != null)
        {
            if (this.songsDataGridView.Columns[e.ColumnIndex].Name == "Release Date")
            {
                if (e.Value != null)
                {
                    try
                    {
                        e.Value = DateTime.Parse(e.Value.ToString())
                            .ToLongDateString();
                        e.FormattingApplied = true;
                    }
                    catch (FormatException)
                    {
                        Console.WriteLine("{0} is not a valid date.", e.Value.ToString());
                    }
                }
            }
        }
    }

    private void addNewRowButton_Click(object sender, EventArgs e)
    {
        this.songsDataGridView.Rows.Add();
    }

    private void deleteRowButton_Click(object sender, EventArgs e)
    {
        if (this.songsDataGridView.SelectedRows.Count > 0 &&
            this.songsDataGridView.SelectedRows[0].Index !=
            this.songsDataGridView.Rows.Count - 1)
        {
            this.songsDataGridView.Rows.RemoveAt(
                this.songsDataGridView.SelectedRows[0].Index);
        }
    }

    private void SetupLayout()
    {
        this.Size = new Size(600, 500);

        addNewRowButton.Text = "Add Row";
        addNewRowButton.Location = new Point(10, 10);
        addNewRowButton.Click += new EventHandler(addNewRowButton_Click);

        deleteRowButton.Text = "Delete Row";
        deleteRowButton.Location = new Point(100, 10);
        deleteRowButton.Click += new EventHandler(deleteRowButton_Click);

        buttonPanel.Controls.Add(addNewRowButton);
        buttonPanel.Controls.Add(deleteRowButton);
        buttonPanel.Height = 50;
        buttonPanel.Dock = DockStyle.Bottom;

        this.Controls.Add(this.buttonPanel);
    }

    private void SetupDataGridView()
    {
        this.Controls.Add(songsDataGridView);

        songsDataGridView.ColumnCount = 5;

        songsDataGridView.ColumnHeadersDefaultCellStyle.BackColor = Color.Navy;
        songsDataGridView.ColumnHeadersDefaultCellStyle.ForeColor = Color.White;
        songsDataGridView.ColumnHeadersDefaultCellStyle.Font =
            new Font(songsDataGridView.Font, FontStyle.Bold);

        songsDataGridView.Name = "songsDataGridView";
        songsDataGridView.Location = new Point(8, 8);
        songsDataGridView.Size = new Size(500, 250);
        songsDataGridView.AutoSizeRowsMode =
            DataGridViewAutoSizeRowsMode.DisplayedCellsExceptHeaders;
        songsDataGridView.ColumnHeadersBorderStyle =
            DataGridViewHeaderBorderStyle.Single;
        songsDataGridView.CellBorderStyle = DataGridViewCellBorderStyle.Single;
        songsDataGridView.GridColor = Color.Black;
        songsDataGridView.RowHeadersVisible = false;

        songsDataGridView.Columns[0].Name = "Release Date";
        songsDataGridView.Columns[1].Name = "Track";
        songsDataGridView.Columns[2].Name = "Title";
        songsDataGridView.Columns[3].Name = "Artist";
        songsDataGridView.Columns[4].Name = "Album";
        songsDataGridView.Columns[4].DefaultCellStyle.Font =
            new Font(songsDataGridView.DefaultCellStyle.Font, FontStyle.Italic);

        songsDataGridView.SelectionMode =
            DataGridViewSelectionMode.FullRowSelect;
        songsDataGridView.MultiSelect = false;
        songsDataGridView.Dock = DockStyle.Fill;

        songsDataGridView.CellFormatting += new
            DataGridViewCellFormattingEventHandler(
            songsDataGridView_CellFormatting);
    }

    private void PopulateDataGridView()
    {

        string[] row0 = { "11/22/1968", "29", "Revolution 9", 
            "Beatles", "The Beatles [White Album]" };
        string[] row1 = { "1960", "6", "Fools Rush In", 
            "Frank Sinatra", "Nice 'N' Easy" };
        string[] row2 = { "11/11/1971", "1", "One of These Days", 
            "Pink Floyd", "Meddle" };
        string[] row3 = { "1988", "7", "Where Is My Mind?", 
            "Pixies", "Surfer Rosa" };
        string[] row4 = { "5/1981", "9", "Can't Find My Mind", 
            "Cramps", "Psychedelic Jungle" };
        string[] row5 = { "6/10/2003", "13", 
            "Scatterbrain. (As Dead As Leaves.)", 
            "Radiohead", "Hail to the Thief" };
        string[] row6 = { "6/30/1992", "3", "Dress", "P J Harvey", "Dry" };

        songsDataGridView.Rows.Add(row0);
        songsDataGridView.Rows.Add(row1);
        songsDataGridView.Rows.Add(row2);
        songsDataGridView.Rows.Add(row3);
        songsDataGridView.Rows.Add(row4);
        songsDataGridView.Rows.Add(row5);
        songsDataGridView.Rows.Add(row6);

        songsDataGridView.Columns[0].DisplayIndex = 3;
        songsDataGridView.Columns[1].DisplayIndex = 4;
        songsDataGridView.Columns[2].DisplayIndex = 0;
        songsDataGridView.Columns[3].DisplayIndex = 1;
        songsDataGridView.Columns[4].DisplayIndex = 2;
    }


    [STAThreadAttribute()]
    static void Main()
    {
        Application.EnableVisualStyles();
        Application.Run(new Form1());
    }
}

Compiling the Code

This example requires:

  • References to the System, System.Drawing, and System.Windows.Forms assemblies.

For information about building this example from the command line for Visual Basic or Visual C#, see Building from the Command Line (Visual Basic) or Command-line Building With csc.exe. You can also build this example in Visual Studio by pasting the code into a new project. How to: Compile and Run a Complete Windows Forms Code Example Using Visual Studio
How to: Compile and Run a Complete Windows Forms Code Example Using Visual Studio
How to: Compile and Run a Complete Windows Forms Code Example Using Visual Studio
How to: Compile and Run a Complete Windows Forms Code Example Using Visual Studio

See Also

Tasks

Walkthrough: Creating an Unbound Windows Forms DataGridView Control

Concepts

Data Display Modes in the Windows Forms DataGridView Control

Reference

DataGridView

Other Resources

Displaying Data in the Windows Forms DataGridView Control