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How to: Custom Draw Footer Cells

  • 3 minutes to read
In This Article

#Online Video

WinForms Grid - How to Custom Draw Footer Cells.

#Example

The following example demonstrates how to paint footer cells.

CustomDrawFooterCell

using System;
using System.Data;
using System.Drawing;
using System.ComponentModel;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using DevExpress.Data;
using DevExpress.XtraGrid;
using DevExpress.LookAndFeel;

namespace DXApplication {
    public partial class Form1 : DevExpress.XtraEditors.XtraForm {
        public Form1() {
            InitializeComponent();
            gridControl1.DataSource = TaskObject.GetData();
            gridControl1.ForceInitialize();
            gridView1.OptionsView.ShowFooter = true;
            gridView1.Columns["Memory"].Summary.Add(
                new GridColumnSummaryItem(SummaryItemType.Sum, "Memory", "{0:n} MB"));
            gridView1.CustomDrawFooterCell += GridView1_CustomDrawFooterCell;
        }
        private void GridView1_CustomDrawFooterCell(object sender, DevExpress.XtraGrid.Views.Grid.FooterCellCustomDrawEventArgs e) {
            int dx = e.Bounds.Height;
            Brush brush = e.Cache.GetSolidBrush(DXSkinColors.ForeColors.Information);
            Rectangle r = e.Bounds;
            r.Inflate(-1, -1);
            e.Cache.FillRectangle(brush, r);
            r.Inflate(-6, 0);
            e.Appearance.ForeColor = Color.White;
            e.Appearance.DrawString(e.Cache, e.Info.DisplayText, r);
            e.Handled = true;
        }
    }
    public class TaskObject {
        public string AppName { get; set; }
        [DisplayFormat(DataFormatString = "p")]
        public double CPU { get; set; }
        [DisplayFormat(DataFormatString = "n")]
        public double Memory { get; set; }
        public double Network { get; set; }
        public static List<TaskObject> GetData() {
            return new List<TaskObject> {
                new TaskObject(){ AppName = "Microsoft Teams", CPU = 0.018, Memory = 402.4, Network = 0.1 },
                new TaskObject(){ AppName = "Microsoft Visual Studio 2022", CPU = 0.046, Memory = 1309.2, Network = 0 },
                new TaskObject(){ AppName = "Visual Studio Code", CPU = 0.03, Memory = 104.2, Network = 2.1 },
                new TaskObject(){ AppName = "Microsoft Edge", CPU = 0.078, Memory = 644.7, Network = 10.2 },
            };
        }
    }
}

The following example demonstrates how to customize the text displayed in a footer cell based on a specific condition:

private void GridView1_CustomDrawFooterCell(object sender, FooterCellCustomDrawEventArgs e) {
    if (e.Column.FieldName == "Bytes")
        e.Info.DisplayText = ((int)e.Info.Value / 1024).ToString() + " MBs";
}