1、通过check多选框选择
给当前数据源添加一条，列名Check 然后在gridview添加一列绑定Check列名

dtOrderBind.Columns.Add("Check", System.Type.GetType("System.Boolean"));
指定全选列（Check）的imageIndex默认图片（用微软Imagelist控件）

View Code
#region 事件：订单全选
        private void grvPrintOrder_Click(object sender, EventArgs e)
        {
            Point point = this.grPrintOrder.PointToClient(Cursor.Position);
            DevExpress.XtraGrid.Views.Grid.ViewInfo.GridHitInfo hitInfo = this.grvPrintOrder.CalcHitInfo(point);
            if (hitInfo.InColumnPanel == true)
            {
                string s = hitInfo.Column.FieldName;
                //判断当前当击列是否是全选列
                if (s == "Check")
                {
                    if (Convert.ToBoolean(hitInfo.Column.Tag) == false)
                    {
                        hitInfo.Column.Tag = true;
                        hitInfo.Column.ImageIndex = 1;
                        ChangeChk = true;
                        ChkSelect();
                    }
                    else
                    {
                        hitInfo.Column.Tag = false;
                        hitInfo.Column.ImageIndex = 0;
                        ChangeChk = false;
                        ChkSelect();
                    }
                }
            }
        }
        #endregion

得到当前选中先

View Code
this.grPrintOrder.FocusedView.CloseEditor();
            this.grPrintOrder.FocusedView.UpdateCurrentRow();
            string value = "";
            for (int i = 0; i < this.grvPrintOrder.RowCount; i++)
            {
                value = this.grvPrintOrder.GetDataRow(i)["Check"].ToString();
                if (value.ToLower() == "true")
                {
                    if (!list.Contains(this.grvPrintOrder.GetRowCellValue(i, "id").ToString()))
                    {
                        list.Add(this.grvPrintOrder.GetRowCellValue(i, "id").ToString());
                    }
                }
            }

this.grPrintOrder.FocusedView.CloseEditor();
this.grPrintOrder.FocusedView.UpdateCurrentRow();

这二行代码一定要加上，不然得不到最后一个选择。
2、通过按住shift或ctrl多选

首先设置将gridview设置为多选
  // 设置为多选

this.grvPrintOrder.OptionsSelection.MultiSelect = true;
this.grvPrintOrder.OptionsSelection.MultiSelectMode = DevExpress.XtraGrid.Views.Grid.GridMultiSelectMode.RowSelect;

得到当前用户选择的行

View Code
  int[] grvarry= this.gridView1.GetSelectedRows();   
           for (int i = 0; i < grvarry.Length;i++ )
           {
               DataRow row = this.gridView1.GetDataRow(grvarry[i]);
               if(row!=null)
               {
                   XtraMessageBox.Show(row["comid"].ToString());
               }
           }
           this.gridView1.MoveNext();