DataGridViewRowPrePaintEventArgs Classe

Definição

public ref class DataGridViewRowPrePaintEventArgs : System::ComponentModel::HandledEventArgs

public class DataGridViewRowPrePaintEventArgs : System.ComponentModel.HandledEventArgs

type DataGridViewRowPrePaintEventArgs = class
    inherit HandledEventArgs

Public Class DataGridViewRowPrePaintEventArgs
Inherits HandledEventArgs

Herança

Object

EventArgs

HandledEventArgs

DataGridViewRowPrePaintEventArgs

Exemplos

O exemplo de código seguinte demonstra como lidar com o RowPrePaint evento para desenhar um fundo personalizado para células selecionadas. Este exemplo de código faz parte de um exemplo maior fornecido em Como Personalizar: A Aparência das Linhas no Controlo Windows Forms DataGridView.

// Paints the custom selection background for selected rows.
void dataGridView1_RowPrePaint(object sender,
        DataGridViewRowPrePaintEventArgs e)
{
    // Do not automatically paint the focus rectangle.
    e.PaintParts &= ~DataGridViewPaintParts.Focus;

    // Determine whether the cell should be painted
    // with the custom selection background.
    if ((e.State & DataGridViewElementStates.Selected) ==
                DataGridViewElementStates.Selected)
    {
        // Calculate the bounds of the row.
        Rectangle rowBounds = new Rectangle(
            this.dataGridView1.RowHeadersWidth, e.RowBounds.Top,
            this.dataGridView1.Columns.GetColumnsWidth(
                DataGridViewElementStates.Visible) -
            this.dataGridView1.HorizontalScrollingOffset + 1,
            e.RowBounds.Height);

        // Paint the custom selection background.
        using (Brush backbrush =
            new System.Drawing.Drawing2D.LinearGradientBrush(rowBounds,
                this.dataGridView1.DefaultCellStyle.SelectionBackColor,
                e.InheritedRowStyle.ForeColor,
                System.Drawing.Drawing2D.LinearGradientMode.Horizontal))
        {
            e.Graphics.FillRectangle(backbrush, rowBounds);
        }
    }
}

' Paints the custom selection background for selected rows.
Sub dataGridView1_RowPrePaint(ByVal sender As Object, _
    ByVal e As DataGridViewRowPrePaintEventArgs) _
    Handles dataGridView1.RowPrePaint

    ' Do not automatically paint the focus rectangle.
    e.PaintParts = e.PaintParts And Not DataGridViewPaintParts.Focus

    ' Determine whether the cell should be painted with the 
    ' custom selection background.
    If (e.State And DataGridViewElementStates.Selected) = _
        DataGridViewElementStates.Selected Then

        ' Calculate the bounds of the row.
        Dim rowBounds As New Rectangle( _
            Me.dataGridView1.RowHeadersWidth, e.RowBounds.Top, _
            Me.dataGridView1.Columns.GetColumnsWidth( _
            DataGridViewElementStates.Visible) - _
            Me.dataGridView1.HorizontalScrollingOffset + 1, _
            e.RowBounds.Height)

        ' Paint the custom selection background.
        Dim backbrush As New _
            System.Drawing.Drawing2D.LinearGradientBrush(rowBounds, _
            Me.dataGridView1.DefaultCellStyle.SelectionBackColor, _
            e.InheritedRowStyle.ForeColor, _
            System.Drawing.Drawing2D.LinearGradientMode.Horizontal)
        Try
            e.Graphics.FillRectangle(backbrush, rowBounds)
        Finally
            backbrush.Dispose()
        End Try
    End If

End Sub

Observações

O RowPrePaint evento ocorre antes de uma linha ser pintada num DataGridView controlo. RowPrePaint Permite ajustar manualmente a aparência da linha antes de qualquer célula da linha ser pintada. Isto é útil se quiser personalizar a linha, por exemplo, para produzir uma linha onde o conteúdo de uma coluna abrange várias colunas. Use as propriedades em DataGridViewRowPrePaintEventArgs para obter as definições da linha sem aceder diretamente à linha na DataGridViewlinha .

Ver também

• DataGridView
• RowPrePaint