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(); } 

} 

}