100分求模板列取值解答!

Question

前台:
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" Height="72px" Width="344px">
            <Columns>
                <asp:TemplateField HeaderText="内容">
                    <ItemTemplate>
                       <asp:DropDownList ID="DropDownList1" runat="server">
                            <asp:ListItem Selected="True">aa</asp:ListItem>
                            <asp:ListItem>bb</asp:ListItem>
                            <asp:ListItem>cc</asp:ListItem>
                        </asp:DropDownList>
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:ButtonField ButtonType="Button" Text="查看" CommandName="查看" />
            </Columns>
        </asp:GridView>后台是VB写的:
    Protected Sub GridView1_RowCommand(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewCommandEventArgs) Handles GridView1.RowCommand
        If e.CommandName = "查看" Then
Dim dList1 As DropDownList = CType(GridView1.Rows(e.CommandArgument).FindControl("DropDownList1"), DropDownList)
    Me.TextBox2.Text = dList1.SelectedValue
    End If
    End Sub我在DropDownList1选择不同的内容,比如bb、cc,点查看按钮,出现在文本框的只是默认选择项aa.怎么让我选择什么，点击查看后文本就得到什么？无法正确取得模板列的值并保存

Answer 1

if (!this.IsPostBack)
        {            //绑定数据             
        }

Answer 2

我的代码例子:if(!IsPostBack)
{
//指定数据库,连接,打开
string connstr=Application["ConnString"].ToString();
SqlConnection conn=new SqlConnection(connstr);
conn.Open();
string ssql="Select * from [school]";
SqlDataAdapter sda=new SqlDataAdapter(ssql,conn);
DataSet sds=new DataSet();
sda.Fill(sds,"school");
DropDownList3.DataTextField=sds.Tables["school"].Columns["s_name"].ToString(); 
DropDownList3.DataValueField=sds.Tables["school"].Columns["id"].ToString(); 
DropDownList3.DataSource=sds.Tables[0].DefaultView; 
DropDownList3.DataBind();
conn.Close();
conn.Dispose();
}

Answer 3

呵呵，自己搞定的，两位老兄都说中了，是if (!this.IsPostBack的问题