asp.net给checkBox添加一个绑定属性，后台可以获取

 <asp:CheckBox ID="cbEmail" Checked='<%# Eval("ReceiveEmail")%>' runat="server"CommandArgument='<%# Eval("UserSearchId")%>' AutoPostBack="True" OnCheckedChanged="CheckEmailChanged"  /> 

 protected void CheckEmailChanged(object sender, EventArgs e) {

CheckBox cb = (CheckBox) sender;

int abc=int.Parse(cb.Attributes["CommandArgument"])

}