How to: Custom Paint Sort Glyphs Within Column Headers

• Nov 13, 2018
• 2 minutes to read

This example demonstrates how to fill the “Category_Name” column header with the Coral color.

C#

using DevExpress.Utils;
using DevExpress.Utils.Drawing;
using DevExpress.XtraGrid;
using DevExpress.XtraGrid.Views.Grid;

private void Form3_Load1(object sender, EventArgs e) {
    CustomDrawColumnHeader(gridControl1, gridView1);
}

public static void CustomDrawColumnHeader(GridControl gridControl, GridView gridView) {
    // Handle this event to paint columns headers manually
    gridView.CustomDrawColumnHeader += (s, e) => {
        if (e.Column == null || e.Column.FieldName != "Category_Name")
            return;
        // Fill column headers with the specified colors.
        e.Cache.FillRectangle(Color.Coral, e.Bounds);
        e.Appearance.DrawString(e.Cache, e.Info.Caption, e.Info.CaptionRect);
        // Draw the filter and sort buttons.
        foreach (DrawElementInfo info in e.Info.InnerElements) {
            if (!info.Visible) continue;
            ObjectPainter.DrawObject(e.Cache, info.ElementPainter, info.ElementInfo);
        }
        e.Handled = true;
    };
}

VB.NET

Imports DevExpress.Utils
Imports DevExpress.Utils.Drawing
Imports DevExpress.XtraGrid
Imports DevExpress.XtraGrid.Views.Grid

Private Sub Form3_Load1(ByVal sender As Object, ByVal e As EventArgs)
    CustomDrawColumnHeader(gridControl1, gridView1)
End Sub

Public Shared Sub CustomDrawColumnHeader(ByVal gridControl As GridControl, ByVal gridView As GridView)
    ' Handle this event to paint columns headers manually
    AddHandler gridView.CustomDrawColumnHeader, Sub(s, e)
        If e.Column Is Nothing OrElse e.Column.FieldName <> "Category_Name" Then
            Return
        End If
        ' Fill column headers with the specified colors.
        e.Cache.FillRectangle(Color.Coral, e.Bounds)
        e.Appearance.DrawString(e.Cache, e.Info.Caption, e.Info.CaptionRect)
        ' Draw the filter and sort buttons.
        For Each info As DrawElementInfo In e.Info.InnerElements
            If Not info.Visible Then
              Continue For
            End If
            ObjectPainter.DrawObject(e.Cache, info.ElementPainter, info.ElementInfo)
        Next info
        e.Handled = True
    End Sub
End Sub