DataGridView.ColumnCount Propriedade

Definição

Namespace:

System.Windows.Forms

Assembly:

System.Windows.Forms.dll

Obtém ou define o número de colunas exibidas no DataGridView.

public:
 property int ColumnCount { int get(); void set(int value); };

[System.ComponentModel.Browsable(false)]
public int ColumnCount { get; set; }

[<System.ComponentModel.Browsable(false)>]
member this.ColumnCount : int with get, set

Public Property ColumnCount As Integer

Valor da propriedade

Int32

O número de colunas exibidas no DataGridView.

Atributos

BrowsableAttribute

Exceções

ArgumentOutOfRangeException

O valor especificado ao definir essa propriedade é menor que 0.

InvalidOperationException

Ao definir essa propriedade, a propriedade DataSource foi definida.

Exemplos

O exemplo de código a seguir demonstra como definir as ColumnHeadersDefaultCellStylepropriedades , AutoSizeRowsMode, ColumnHeadersBorderStyle, GridColorCellBorderStyle, BackgroundColor, RowHeadersVisible, SelectionMode, , ColumnCounte MultiSelect . Além disso, o exemplo de código demonstra como definir as DataGridViewColumn.Name propriedades e DataGridViewColumn.DefaultCellStyle . Para executar este exemplo, cole o código em um formulário que contém um DataGridView chamado dataGridView1e chame o SetUpDataGridView método do construtor ou Load manipulador de eventos do formulário. Verifique se todos os eventos estão associados aos manipuladores de eventos.

void SetUpDataGridView()
{
   this->Controls->Add( dataGridView1 );
   dataGridView1->ColumnCount = 5;
   DataGridViewCellStyle^ style = dataGridView1->ColumnHeadersDefaultCellStyle;
   style->BackColor = Color::Navy;
   style->ForeColor = Color::White;
   style->Font = gcnew System::Drawing::Font( dataGridView1->Font,FontStyle::Bold );
   dataGridView1->EditMode = DataGridViewEditMode::EditOnEnter;
   dataGridView1->Name = "dataGridView1";
   dataGridView1->Location = Point(8,8);
   dataGridView1->Size = System::Drawing::Size( 500, 300 );
   dataGridView1->AutoSizeRowsMode = DataGridViewAutoSizeRowsMode::DisplayedCellsExceptHeaders;
   dataGridView1->ColumnHeadersBorderStyle = DataGridViewHeaderBorderStyle::Raised;
   dataGridView1->CellBorderStyle = DataGridViewCellBorderStyle::Single;
   dataGridView1->GridColor = SystemColors::ActiveBorder;
   dataGridView1->RowHeadersVisible = false;
   dataGridView1->Columns[ 0 ]->Name = "Release Date";
   dataGridView1->Columns[ 1 ]->Name = "Track";
   dataGridView1->Columns[ 1 ]->DefaultCellStyle->Alignment = DataGridViewContentAlignment::MiddleCenter;
   dataGridView1->Columns[ 2 ]->Name = "Title";
   dataGridView1->Columns[ 3 ]->Name = "Artist";
   dataGridView1->Columns[ 4 ]->Name = "Album";

   // Make the font italic for row four.
   dataGridView1->Columns[ 4 ]->DefaultCellStyle->Font = gcnew System::Drawing::Font( DataGridView::DefaultFont,FontStyle::Italic );
   dataGridView1->SelectionMode = DataGridViewSelectionMode::FullRowSelect;
   dataGridView1->MultiSelect = false;
   dataGridView1->BackgroundColor = Color::Honeydew;
   dataGridView1->Dock = DockStyle::Fill;
   dataGridView1->CellFormatting += gcnew DataGridViewCellFormattingEventHandler( this, &Form1::dataGridView1_CellFormatting );
   dataGridView1->CellParsing += gcnew DataGridViewCellParsingEventHandler( this, &Form1::dataGridView1_CellParsing );
   addNewRowButton->Click += gcnew EventHandler( this, &Form1::addNewRowButton_Click );
   deleteRowButton->Click += gcnew EventHandler( this, &Form1::deleteRowButton_Click );
   ledgerStyleButton->Click += gcnew EventHandler( this, &Form1::ledgerStyleButton_Click );
   dataGridView1->CellValidating += gcnew DataGridViewCellValidatingEventHandler( this, &Form1::dataGridView1_CellValidating );
}

private void SetUpDataGridView()
{
    this.Controls.Add(dataGridView1);
    dataGridView1.ColumnCount = 5;
    DataGridViewCellStyle style = 
        dataGridView1.ColumnHeadersDefaultCellStyle;
    style.BackColor = Color.Navy;
    style.ForeColor = Color.White;
    style.Font = new Font(dataGridView1.Font, FontStyle.Bold);

    dataGridView1.EditMode = DataGridViewEditMode.EditOnEnter;
    dataGridView1.Name = "dataGridView1";
    dataGridView1.Location = new Point(8, 8);
    dataGridView1.Size = new Size(500, 300);
    dataGridView1.AutoSizeRowsMode = 
        DataGridViewAutoSizeRowsMode.DisplayedCellsExceptHeaders;
    dataGridView1.ColumnHeadersBorderStyle = 
        DataGridViewHeaderBorderStyle.Raised;
    dataGridView1.CellBorderStyle = DataGridViewCellBorderStyle.Single;
    dataGridView1.GridColor = SystemColors.ActiveBorder;
    dataGridView1.RowHeadersVisible = false;

    dataGridView1.Columns[0].Name = "Release Date";
    dataGridView1.Columns[1].Name = "Track";
    dataGridView1.Columns[1].DefaultCellStyle.Alignment = 
        DataGridViewContentAlignment.MiddleCenter;
    dataGridView1.Columns[2].Name = "Title";
    dataGridView1.Columns[3].Name = "Artist";
    dataGridView1.Columns[4].Name = "Album";

    // Make the font italic for row four.
    dataGridView1.Columns[4].DefaultCellStyle.Font = new Font(DataGridView.DefaultFont, FontStyle.Italic);

    dataGridView1.SelectionMode = DataGridViewSelectionMode.FullRowSelect;
    dataGridView1.MultiSelect = false;

    dataGridView1.BackgroundColor = Color.Honeydew;

    dataGridView1.Dock = DockStyle.Fill;

    dataGridView1.CellFormatting += new DataGridViewCellFormattingEventHandler(dataGridView1_CellFormatting);
    dataGridView1.CellParsing += new DataGridViewCellParsingEventHandler(dataGridView1_CellParsing);
    addNewRowButton.Click += new EventHandler(addNewRowButton_Click);
    deleteRowButton.Click += new EventHandler(deleteRowButton_Click);
    ledgerStyleButton.Click += new EventHandler(ledgerStyleButton_Click);
    dataGridView1.CellValidating += new DataGridViewCellValidatingEventHandler(dataGridView1_CellValidating);
}

Private Sub SetUpDataGridView()

    Me.Controls.Add(dataGridView1)
    dataGridView1.ColumnCount = 5

    With dataGridView1.ColumnHeadersDefaultCellStyle
        .BackColor = Color.Navy
        .ForeColor = Color.White
        .Font = New Font(dataGridView1.Font, FontStyle.Bold)
    End With

    With dataGridView1
        .EditMode = DataGridViewEditMode.EditOnEnter
        .Name = "dataGridView1"
        .Location = New Point(8, 8)
        .Size = New Size(500, 300)
        .AutoSizeRowsMode = _
            DataGridViewAutoSizeRowsMode.DisplayedCellsExceptHeaders
        .ColumnHeadersBorderStyle = _
            DataGridViewHeaderBorderStyle.Raised
        .CellBorderStyle = _
            DataGridViewCellBorderStyle.Single
        .GridColor = SystemColors.ActiveBorder
        .RowHeadersVisible = False

        .Columns(0).Name = "Release Date"
        .Columns(1).Name = "Track"
        .Columns(1).DefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleCenter
        .Columns(2).Name = "Title"
        .Columns(3).Name = "Artist"
        .Columns(4).Name = "Album"

        ' Make the font italic for row four.
        .Columns(4).DefaultCellStyle.Font = _
            New Font(Control.DefaultFont, _
                FontStyle.Italic)

        .SelectionMode = _
            DataGridViewSelectionMode.FullRowSelect
        .MultiSelect = False

        .BackgroundColor = Color.Honeydew

        .Dock = DockStyle.Fill
    End With

End Sub

Comentários

Definir a ColumnCount propriedade como 0 removerá todas as colunas do DataGridView.

Se ColumnCount for redefinido para um valor menor que o valor atual, as colunas serão removidas do final da Columns coleção. Se ColumnCount for definido como um valor maior que o valor atual, as colunas serão adicionadas ao final da Columns coleção.

Essa propriedade pode ser usada com a RowCount propriedade para criar um simples DataGridView para exibir e editar texto.

Para obter mais informações sobre como lidar com eventos, consulte Manipulando e levantando eventos.

Confira também

• Controle DataGridView (Windows Forms)