DevExpress完成GridControl列頭繪制Checkbox的辦法。本站提示廣大學習愛好者:(DevExpress完成GridControl列頭繪制Checkbox的辦法)文章只能為提供參考,不一定能成為您想要的結果。以下是DevExpress完成GridControl列頭繪制Checkbox的辦法正文
本文實例展現了DevExpress完成GridControl列頭繪制Checkbox的辦法,詳細完成辦法以下:
重要功效代碼以下:
/// <summary> /// 為列頭繪制CheckBox /// </summary> /// <param name="view">GridView</param> /// <param name="checkItem">RepositoryItemCheckEdit</param> /// <param name="fieldName">須要繪制Checkbox的列名</param> /// <param name="e">ColumnHeaderCustomDrawEventArgs</param> public static void DrawHeaderCheckBox(this GridView view, RepositoryItemCheckEdit checkItem, string fieldName, ColumnHeaderCustomDrawEventArgs e) { /*解釋: *參考:https://www.devexpress.com/Support/Center/Question/Details/Q354489 *在CustomDrawColumnHeader中應用 *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; }
代碼應用辦法以下:
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); }
代碼運轉後果以下圖所示: