Dev+Grid复选框（全选，反选）

DevExpress+Grid 全选反选记录

一、先建一个辅助类

    public class GridControlHelp
    {
        /// <summary>
        /// draw checkbox
        /// </summary>
        /// <param name="e"></param>
        /// <param name="chk"></param>
        public static void DrawCheckBox(DevExpress.XtraGrid.Views.Grid.ColumnHeaderCustomDrawEventArgs e, bool chk)
        {
            DevExpress.XtraEditors.Repository.RepositoryItemCheckEdit repositoryCheck = e.Column.ColumnEdit as DevExpress.XtraEditors.Repository.RepositoryItemCheckEdit;
            if (repositoryCheck != null)
            {
                System.Drawing.Graphics g = e.Graphics;
                System.Drawing.Rectangle r = e.Bounds;

                DevExpress.XtraEditors.ViewInfo.CheckEditViewInfo info;
                DevExpress.XtraEditors.Drawing.CheckEditPainter painter;
                DevExpress.XtraEditors.Drawing.ControlGraphicsInfoArgs args;
                info = repositoryCheck.CreateViewInfo() as DevExpress.XtraEditors.ViewInfo.CheckEditViewInfo;

                painter = repositoryCheck.CreatePainter() as DevExpress.XtraEditors.Drawing.CheckEditPainter;

                info.EditValue = chk;
                info.Bounds = r;
                info.CalcViewInfo(g);
                args = new DevExpress.XtraEditors.Drawing.ControlGraphicsInfoArgs(info, new DevExpress.Utils.Drawing.GraphicsCache(g), r);
                painter.Draw(args);
                args.Cache.Dispose();
            }
        }

        /// <summary>
        /// click checkbox event
        /// </summary>
        /// <param name="gridView"></param>
        /// <param name="fieldName"></param>
        /// <param name="currentStatus"></param>
        /// <returns></returns>
        public static bool ClickGridCheckBox(DevExpress.XtraGrid.Views.Grid.GridView gridView, string fieldName, bool currentStatus)
        {
            bool result = false;
            if (gridView != null)
            {
                //禁止排序 
                gridView.ClearSorting();

                gridView.PostEditor();
                DevExpress.XtraGrid.Views.Grid.ViewInfo.GridHitInfo info;
                System.Drawing.Point pt = gridView.GridControl.PointToClient(Control.MousePosition);
                info = gridView.CalcHitInfo(pt);
                if (info.InColumn && info.Column != null && info.Column.FieldName == fieldName)
                {
                    for (int i = 0; i < gridView.RowCount; i++)
                    {
                        gridView.SetRowCellValue(i, fieldName, !currentStatus);
                    }
                    return true;
                }
            }
            return result;
        }



    }

二、需要用到Grid控件的几个事件

gvBk_Click控件click事件

gvBk_CustomDrawColumnHeader表头重绘事件

gvBk_DataSourceChanged数据源改变事件

gvBk_RowCellClick单元格点击事件

bool checkStatus = true;默认是否选中状态

1.数据源中添加选中状态字段Bool类型，True选中，false取消选中

DataTable table = EdiBookingBiz.GetBookingBySchid(ssd, user);//用vessel和voyage去找booking
 if (table.Rows.Count > 0)
{
    table.Columns.Add("Chk", System.Type.GetType("System.Boolean"));
    table.Columns["Chk"].DefaultValue = Boolean.FalseString;
}

bool checkStatus = true;
private void gvBk_Click(object sender, EventArgs e)
{
    if (GridControlHelp.ClickGridCheckBox(gvBk, "Chk", checkStatus))
    {
       checkStatus = !checkStatus;
     }
}

private void gvBk_CustomDrawColumnHeader(object sender, ColumnHeaderCustomDrawEventArgs e)
{
     if (e.Column != null && e.Column.FieldName == "Chk")
      {
         e.Info.InnerElements.Clear();
         e.Painter.DrawObject(e.Info);
         GridControlHelp.DrawCheckBox(e, checkStatus);
         e.Handled = true;
      }
}

private void gvBk_DataSourceChanged(object sender, EventArgs e)
{
   GridColumn column = this.gvBk.Columns.ColumnByFieldName("Chk");
   if (column != null)
   {
      column.Width = 80;
      column.OptionsColumn.ShowCaption = false;
      column.ColumnEdit = new RepositoryItemCheckEdit();
    }
}

 private void gvBk_RowCellClick(object sender, DevExpress.XtraGrid.Views.Grid.RowCellClickEventArgs e)
{
  string columnName = gvBk.FocusedColumn.FieldName.ToString();
  if (columnName == "Chk")
  {
     DevExpress.XtraEditors.Repository.RepositoryItemCheckEdit repositoryCheck = e.Column.ColumnEdit as DevExpress.XtraEditors.Repository.RepositoryItemCheckEdit;
     string value = gvBk.GetFocusedRowCellValue(columnName).ToString();
     int hand = e.RowHandle;
     if (value == "True")
     {
       gvBk.SetRowCellValue(hand, "Chk", false);
      }
      else
      {
        gvBk.SetRowCellValue(hand, "Chk", true);
       }
      //修改后的值更新到数据源
      gvBk.CloseEditor();
      gvBk.UpdateCurrentRow();
  }
}
//默认全选的方法
private  void SelectAll(DataTable tableSource)
{
  if (!checkStatus) checkStatus = true;
  if (tableSource != null && tableSource.Rows.Count > 0)
  {
    foreach (DataRow item in tableSource.Rows)
    {
      item["Chk"] = true;
    }
    gridBk.DataSource = tableSource;
  }
}