本文实例展示了DevExpress实现GridControl列头绘制Checkbox的方法，具体实现方法如下：

主要功能代码如下：

/// <summary> /// 为列头绘制CheckBox /// </summary> /// <param name="view">GridView</param> /// <param name="checkItem">RepositoryItemCheckEdit</param> /// <param name="fieldName">需要绘制Checkbox的列名</param> /// <param name="e">ColumnHeaderCustomDrawEventArgs</param> public static void DrawHeaderCheckBox(this GridView view, RepositoryItemCheckEdit checkItem, string fieldName, ColumnHeaderCustomDrawEventArgs e) { /*说明： *参考：https://www.devexpress.com/Support/Center/Question/Details/Q354489 *在CustomDrawColumnHeader中使用 *eg： * private void gvCabChDetail_CustomDrawColumnHeader(object sender, DevExpress.XtraGrid.Views.Grid.ColumnHeaderCustomDrawEventArgs e) * { * GridView _view = sender as GridView; * _view.DrawHeaderCheckBox(CheckItem, "Check", e); * } */ if (e.Column != null && e.Column.FieldName.Equals(fieldName)) { e.Info.InnerElements.Clear(); e.Painter.DrawObject(e.Info); DrawCheckBox(checkItem, e.Graphics, e.Bounds, getCheckedCount(view, fieldName) == view.DataRowCount); e.Handled = true; } } private static void DrawCheckBox(RepositoryItemCheckEdit checkItem, Graphics g, Rectangle r, bool Checked) { CheckEditViewInfo _info; CheckEditPainter _painter; ControlGraphicsInfoArgs _args; _info = checkItem.CreateViewInfo() as CheckEditViewInfo; _painter = checkItem.CreatePainter() as CheckEditPainter; _info.EditValue = Checked; _info.Bounds = r; _info.PaintAppearance.ForeColor = Color.Black; _info.CalcViewInfo(g); _args = new ControlGraphicsInfoArgs(_info, new DevExpress.Utils.Drawing.GraphicsCache(g), r); _painter.Draw(_args); _args.Cache.Dispose(); } private static int getCheckedCount(GridView view, string filedName) { int count = 0; for (int i = 0; i < view.DataRowCount; i++) { object _cellValue = view.GetRowCellValue(i, view.Columns[filedName]); if (_cellValue == null) continue; if (string.IsNullOrEmpty(_cellValue.ToString().Trim())) continue; bool _checkStatus = false; if (bool.TryParse(_cellValue.ToString(), out _checkStatus)) { if (_checkStatus) count++; } } return count; }

代码使用方法如下：

RepositoryItemCheckEdit CheckItem = new RepositoryItemCheckEdit(); const string gcCheckFieldName = "Checked"; private void gvLampConfig_CustomDrawColumnHeader(object sender, ColumnHeaderCustomDrawEventArgs e) { GridView _view = sender as GridView; _view.DrawHeaderCheckBox(CheckItem, gcCheckFieldName, e); }

代码运行效果如下图所示：