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DataGridView.RowPrePaint Event

Note: This event is new in the .NET Framework version 2.0.

Occurs before a DataGridViewRow is painted

Namespace: System.Windows.Forms
Assembly: System.Windows.Forms (in system.windows.forms.dll)

public event DataGridViewRowPrePaintEventHandler RowPrePaint
/** @event */
public void add_RowPrePaint (DataGridViewRowPrePaintEventHandler value)

/** @event */
public void remove_RowPrePaint (DataGridViewRowPrePaintEventHandler value)

JScript supports the use of events, but not the declaration of new ones.

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.
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);
        }
    }
}

Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0

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