DataGridView.ColumnCount Proprietà

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

Valore della proprietà

Numero di colonne visualizzate in DataGridView.

Attributi

BrowsableAttribute

Eccezioni

Esempio

Nell'esempio di codice seguente viene illustrato come impostare le ColumnHeadersDefaultCellStyleproprietà , CellBorderStyleBackgroundColorColumnHeadersBorderStyleAutoSizeRowsModeRowHeadersVisibleSelectionModeGridColorColumnCounte .MultiSelect L'esempio di codice illustra inoltre come impostare le DataGridViewColumn.Name proprietà e DataGridViewColumn.DefaultCellStyle . Per eseguire questo esempio, incollare il codice in un modulo contenente un DataGridView oggetto denominato dataGridView1e quindi chiamare il SetUpDataGridView metodo dal costruttore o Load dal gestore eventi del modulo. Assicurarsi che tutti gli eventi siano associati ai gestori eventi.

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

Commenti

L'impostazione della ColumnCount proprietà su 0 rimuoverà tutte le colonne dall'oggetto DataGridView.

Se ColumnCount viene reimpostato un valore minore del valore corrente, le colonne verranno rimosse dalla fine della Columns raccolta. Se ColumnCount è impostato su un valore maggiore del valore corrente, le colonne verranno aggiunte alla fine della Columns raccolta.

Questa proprietà può essere usata con la RowCount proprietà per creare una semplice DataGridView visualizzazione e modifica del testo.

Per altre informazioni su come gestire gli eventi, vedere la gestione e generazione di eventi.

Si applica a

Vedi anche

• Controllo DataGridView (Windows Form)