本示例展示了如何定制视图的 预览区，这是通过 GridView.CustomDrawRowPreview 事件实现的。 在本示例中，在文本左侧绘制一个来源于“Photo”列的图像。 FromByteArray 静态方法允许把从单元格返回的字节数组转换为 Image 对象。

C#CopyCode image复制代码
using DevExpress.XtraGrid.Views.Base;

private void gridView1_CustomDrawRowPreview(object sender, RowObjectCustomDrawEventArgs e) {
   int dx = 5;
   // A rectangle for displaying text.
   Rectangle r = e.Bounds;
   r.X += e.Bounds.Height + dx * 2;
   r.Width -= (e.Bounds.Height + dx * 3);
   // Draw an image from the "Photo" column.
   e.Graphics.DrawImage(DevExpress.XtraEditors.Controls.ByteImageConverter.FromByteArray(
     (byte[])gridView1.GetDataRow(e.RowHandle)["Photo"]), e.Bounds.X + dx, 
     e.Bounds.Y, e.Bounds.Height, e.Bounds.Height);
   // Draw the text.
   e.Appearance.DrawString(e.Cache, gridView1.GetRowPreviewDisplayText(e.RowHandle), r);
   // No default painting is required
   e.Handled = true;
}
Visual BasicCopyCode image复制代码
Imports DevExpress.XtraGrid.Views.Base

Private Sub gridView1_CustomDrawRowPreview(ByVal sender As Object, _
ByVal e As RowObjectCustomDrawEventArgs) Handles gridView1.CustomDrawRowPreview
    Dim dx As Integer = 5
    'A rectangle for displaying text
    Dim r As Rectangle = e.Bounds
    r.X += e.Bounds.Height + dx * 2
    r.Width -= e.Bounds.Height + dx * 3
    'Draw an image from the "Photo" column
    e.Graphics.DrawImage(DevExpress.XtraEditors.Controls.ByteImageConverter.FromByteArray( _
      CType(gridView1.GetDataRow(e.RowHandle)("Photo"), Byte())), e.Bounds.X + dx, _
      e.Bounds.Y, e.Bounds.Height, e.Bounds.Height)
    'Draw the text
    e.Appearance.DrawString(e.Cache, gridView1.GetRowPreviewDisplayText(e.RowHandle), r)
    'No default painting is required
    e.Handled = True
End Sub