【Wonder原创】GridView—CheckBox全选

一、前台

<asp:TemplateField>
                                <HeaderTemplate>
                                    <asp:CheckBox ID="chkALL" runat="server" Text="全选" AutoPostBack="false" />
                                </HeaderTemplate>
                                <ItemTemplate>
                                    <asp:CheckBox ID="ck_Select" runat="server" Width="20px" />
                                    <asp:Label ID="D_lrrr" runat="server" Font-Bold="true" ForeColor="Red" Text='<%# (Container.DataItemIndex+1)+"." %>'
                                        Visible="true" Width="20px"></asp:Label>
                                </ItemTemplate>
                                <ItemStyle HorizontalAlign="Left" Width="50px" />

<script language="javascript" type="text/javascript">
        function selectAll(ctlName,headchkid)
        {
            var chkall = document.getElementById(headchkid);
            var bool = chkall.checked ;   
           var ctl = document.getElementById(ctlName);//根据控件的在客户端所呈现的ID获取控件
           var checkbox = ctl.getElementsByTagName('input');//获取该控件内标签为input的控件
           /*所有Button、TextBox、CheckBox、RadioButton类型的服务器端控件在解释成Html控件后，都为<input type=''./>，通过type区分它们的类型。*/
           for(var i=0;i<checkbox.length;i++)
           {   
               if(checkbox[i].type=='checkbox')
               {
                    checkbox[i].checked = bool ;
               }
            }
        }
    </script>

二、后台

if (e.Row.RowType == DataControlRowType.Header)
        {
            CheckBox chk = (CheckBox)e.Row.FindControl("chkALL");
            string str = string.Format("javascript:selectAll('{0}','{1}');",gvList.ClientID,chk.ClientID);
            chk.Attributes.Add("onclick", str);
        }