DataGridViewRowPrePaintEventArgs 类

定义

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

public class DataGridViewRowPrePaintEventArgs : System.ComponentModel.HandledEventArgs

type DataGridViewRowPrePaintEventArgs = class
    inherit HandledEventArgs

Public Class DataGridViewRowPrePaintEventArgs
Inherits HandledEventArgs

继承

Object

EventArgs

HandledEventArgs

DataGridViewRowPrePaintEventArgs

示例

下面的代码示例演示如何处理 RowPrePaint 事件以绘制所选单元格的自定义背景。 此代码示例是 操作方法：自定义 Windows 窗体 DataGridView 控件中行的外观的大型示例的一部分。

// 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

注解

在 RowPrePaint 控件上 DataGridView 绘制行之前发生该事件。 RowPrePaint 使你能够在绘制行中的任何单元格之前手动调整行的外观。 如果要自定义行，例如生成一个行，其中一列的内容跨越多个列，这非常有用。 使用 中的DataGridViewRowPrePaintEventArgs属性获取行的设置，而无需直接访问行。DataGridView

另请参阅

• DataGridView
• RowPrePaint