DataGridView.RowPrePaint Event
Occurs before a DataGridViewRow is painted
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
You can handle this event alone or in combination with the RowPostPaint event to customize the appearance of rows in the control. You can paint entire rows yourself, or paint specific parts of rows and use the following methods of the DataGridViewRowPrePaintEventArgs class to paint other parts:
You can also use the VisualStyleRenderer class to paint standard controls using the current theme. For more information, see Rendering Controls with Visual Styles. If you are using Visual Studio 2005, you also have access to a large library of standard images that you can use with the DataGridView control.
Visual Studio 2005 Image Library
Visual Studio 2008 Image Library
Visual Studio Image Library
For more information about handling events, see Consuming Events.
The following code example demonstrates how to use a handler for the RowPrePaint event to paint a gradient row background if the row is selected. This example is part of a larger example available in How to: Customize the Appearance of Rows in the Windows Forms DataGridView Control.
' 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 'dataGridView1_RowPrePaint
Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.