[DevExpress]GridControl 列头绘制Checkbox

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关键代码：

        /// <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：

        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);
        }

代码效果：

希望有所帮助！

[DevExpress]GridControl 列头绘制Checkbox,布布扣,bubuko.com

[DevExpress]GridControl 列头绘制Checkbox

标签：style   blog   http   color   使用   width   

原文地址：http://www.cnblogs.com/Yan-Zhiwei/p/3815997.html