GridView中实现CheckBox的全选

用服务器端的方法： 
在页面上放一个gridview控件，配置好数据源，编辑列，添加一个模版列，再编辑模版，放入一个checkbox控件。代码如下：

<asp:GridView ID="GridView1" runat="server" AllowPaging="True" AutoGenerateColumns="False"         DataKeyNames="AreaID" DataSourceID="SqlDataSource1">         <Columns>             <asp:BoundField DataField="AreaID" HeaderText="AreaID" ReadOnly="True" SortExpression="AreaID" />             <asp:BoundField DataField="CityID" HeaderText="CityID" SortExpression="CityID" />             <asp:TemplateField>                 <HeaderTemplate>                     <asp:CheckBox ID="chkAll" runat="server" AutoPostBack="True" 

 OnCheckedChanged="chkAll_CheckedChanged" />                 </HeaderTemplate>                 <ItemTemplate>                     <asp:CheckBox ID="chkItem" runat="server" />                 </ItemTemplate>             </asp:TemplateField>         </Columns>     </asp:GridView>

 

后台cs代码： 

protected void chkAll_CheckedChanged(object sender, EventArgs e) {     for (int i = 0; i < this.GridView1.Rows.Count; i++)     {         ((CheckBox)GridView1.Rows[i].FindControl("chkItem")).Checked =              ((CheckBox)this.GridView1.HeaderRow.FindControl("chkAll")).Checked;     } }

用脚本实现： 

<asp:GridView ID="GridView1" runat="server" AllowPaging="True" AutoGenerateColumns="False"         DataKeyNames="AreaID" DataSourceID="SqlDataSource1">         <Columns>             <asp:BoundField DataField="AreaID" HeaderText="AreaID" ReadOnly="True" 

 SortExpression="AreaID" />             <asp:BoundField DataField="CityID" HeaderText="CityID" SortExpression="CityID" />             <asp:TemplateField>                 <HeaderTemplate>                     <input id="chkAll"  onclick="SelectAll(this)"; type=checkbox>                 </HeaderTemplate>                 <ItemTemplate>                     <input id="chkItem" type=checkbox>                                  </ItemTemplate>             </asp:TemplateField>         </Columns>     </asp:GridView>

再客户端写javascript 

function SelectAll(chkbox) {    var box=chkbox;    state=theBox.checked;        elem=box.form.elements;    for(i=0;i<elem.length;i++)    if(elem[i].type=="checkbox" && elem[i].id!=box.id)     {          if(elem[i].checked!=state)          {             elem[i].click();          }     }  }