ASP.NET GridView模板控件问题

Question

//这个是一个按钮控件的click事件代码
protected void BtnSumit_Click(object sender, EventArgs e)
        {
            
                foreach (GridViewRow row in Gridview1.Rows)
                {
                    
                    if (row.RowType == DataControlRowType.DataRow)
                    {
                        
                        string Grade = ((RadioButtonList)row.FindControl("RadList1")).SelectedValue;                    }
                }
        }在我的gridview中自定义了radioButtonList控件：
                                            <ItemTemplate>
                                                <asp:RadioButtonList ID="RadList1" runat="server" 
                                                    RepeatDirection="Horizontal" AppendDataBoundItems="True">
                                                    <asp:ListItem Value="A">A</asp:ListItem>
                                                    <asp:ListItem Value="B">B</asp:ListItem>
                                                    <asp:ListItem Value="C">C</asp:ListItem>
                                                    <asp:ListItem Value="D">D</asp:ListItem>
                                                </asp:RadioButtonList>
                                            </ItemTemplate>
出现的问题：在网页Gridview1中点击RadioButtonList控件，然后点击提交按钮，响应按钮事件时，使用FindControl是可以找得到RadioButtonList控件的，但是string Grade = ((RadioButtonList)row.FindControl("RadList1")).SelectedValue;
这句代码Grade的值却为空。求各路大侠指点！！！！！！

Answer 1

为什么要这样写呢？this.RadList1.selectedItem[0]这样不行吗？

Answer 2

我要的是获取我在RadList1上选择的内容，这样只是获取了RadList1的第一项

Answer 3

写了个 你改成这样看看protected void BtnSumit_Click(object sender, EventArgs e)
  {
 foreach (GridViewRow row in Gridview1.Rows)
            {
                if (row.RowType == DataControlRowType.DataRow)
                {
                    RadioButtonList rbs = ((RadioButtonList)row.FindControl("RadList1"));
                    for (int i = 0; i < rbs.Items.Count; i++)
                    {
                        if (rbs.Items[i].Selected == true)
                        { 
                       Response.Write(rbs.Items[i].Text)//or Value
                        }
                    }
                }
            }
  }

Answer 4

 protected void Button1_Click(object sender, EventArgs e)
        {
            string selectValue = string.Empty;
            foreach (GridViewRow item in this.gvList.Rows)
            {
                RadioButtonList rList = (RadioButtonList)item.FindControl("RadList1");
                if (rList.SelectedValue != string.Empty)
                {
                    selectValue += rList.SelectedValue + ";";
                }
            }
            //输出每个RadioButtonList选择的值
            Response.Write(selectValue);
        }

Answer 5

问题解决了，是页面回发的问题。在页面回发时在Page_Load事件中Gridview又一次绑定数据，所以RadioButtonList会被重置，值就相当于没有了。谢谢大家了！

Answer 6

 protected void Button1_Click(object sender, EventArgs e)
        {
            foreach (GridViewRow row in this.GridView1.Rows)
            {
                if (row.RowType == DataControlRowType.DataRow)
                {
                    RadioButtonList button = ((RadioButtonList)row.FindControl("RadioButtonList"));
                    ListItem item = button.SelectedItem;
                    string value = item.Value;
                    Response.Write("<script>alert('" + value + "');</script>");
                }
            }
        }