GridView的一个比较菜的问题

前台:
<form id= "form1 " runat= "server ">



<asp:GridView ID= "GridView1 " runat= "server " Width= "332px " AutoGenerateColumns= "False ">
<Columns>


<asp:TemplateField HeaderText= "等级 ">
<ItemTemplate>
<asp:DropDownList ID= "ChannelClass " runat=server Width=50px OnSelectedIndexChanged= "ChannelClassSelectIndexChanged " AutoPostBack=true>
<asp:ListItem> A </asp:ListItem>
<asp:ListItem> B </asp:ListItem>
<asp:ListItem> C </asp:ListItem>
</asp:DropDownList>

</ItemTemplate>

</asp:TemplateField>


</Columns>
</asp:GridView>
<asp:Button ID= "Button1 " runat= "server " OnClick= "Button1_Click " Text= "提交 " Width= "107px " />

</form>
后台:
protected void ChannelClassSelectIndexChanged(object sender, System.EventArgs e)

{

}

protected void Button1_Click(object sender, EventArgs e)
{
//遍历取出DropDownList控件选中的值并打印
foreach (GridViewRow row in GridView1.Rows)
{
string mylable = ((DropDownList)row.FindControl( "ChannelClass ")).SelectedValue;

Response.Write(mylable);
}

}
比如我在前台的模板列选择的值分别是A和B
我希望点击提交按钮后打印A和B
但每次打印的都是默认的AAA序列,请知道的给点提示,偶查过资料了也不行
跪着求大家了


[解决办法]
看看你的Page_Load是不是有绑定的代码,如果有加上if(!this.IsPostBack)
[解决办法]
关键部分的代码好像没贴出来..

检查下 GridView 的数据绑定代码,
看是不是每次回发都重新绑定了?!..

如果是在Page_Load中做的绑定,请注意下 IsPostBack ..