[C#]RadioButtonList控件取值问题

我使用this.rbtnItems.SelectedValue取不到值.但使用Request.Form["rbtnItems"]却能取到.不知是什么原因default.aspx
-------------------------------------------
    <form id="form1" runat="server">
    <table border="0" cellpadding="0" cellspacing="0" class="style1">
        <tr>
            <td bgcolor="#3333CC">
                <asp:Label ID="LabelTitle" runat="server" Text="Label"></asp:Label>
            </td>
        </tr>
        <tr>
            <td align="center" valign="middle">
                <asp:RadioButtonList ID="rbtnItems" runat="server" Height="53px" Width="672px">
                </asp:RadioButtonList>
            </td>
        </tr>
        <tr>
            <td align="center" bgcolor="Blue">
                <asp:Button ID="btnVote" runat="server" Text="投 票" onclick="btnVote_Click" />
&nbsp;<asp:Button ID="btnShow" runat="server" Text="结 果" />
            </td>
        </tr>
    </table>
    </form>-------------------------------------------default.aspx.cs
-------------------------------------------
        //创建Conn对象
        SqlConnection objConn = DB.createConnection();
        //打开Conn
        objConn.Open();
        //建立和查询
        SqlCommand cmd = new SqlCommand("select voteTitle from voteMaster where voteID=" + this.voteid, objConn);
        string strTitle = Convert.ToString(cmd.ExecuteScalar());
        this.LabelTitle.Text = strTitle;        SqlCommand cmdItems = new SqlCommand("select * from voteDetails where voteId=" + this.voteid, objConn);
        SqlDataReader objRs = cmdItems.ExecuteReader();
        this.rbtnItems.DataSource = objRs;
        this.rbtnItems.DataTextField = "voteItem";
        this.rbtnItems.DataValueField = "voteDetailsID";
        this.rbtnItems.DataBind();        objRs.Close();
        objConn.Close();

解决方案 »

  1.   

    //是否做了回传判断
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        { 
         //绑定数据
        }
    }
      

  2.   

    可以这样： 
    <%@   Page   Language= "C# "   AutoEventWireup= "true "   CodeFile= "Default18.aspx.cs "   Inherits= "Default18 "   %> <!DOCTYPE   html   PUBLIC   "-//W3C//DTD   XHTML   1.0   Transitional//EN "   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd "> 
    <html   xmlns= "http://www.w3.org/1999/xhtml "> 
    <head   runat= "server "> 
        <title> 无标题页 </title> 
    </head> 
    <body> 
        <form   id= "form1 "   runat= "server "> 
            <asp:Repeater   ID= "Repeater1 "   runat= "server "   OnItemDataBound= "Repeater1_ItemDataBound "   > 
                <ItemTemplate> 
                    <div> 
                        <!--问题--> 
                        <asp:Label   ID= "q "   runat= "server ">   <%#   Eval( "qus ")   %> </asp:Label> 
                      
                        <!--选项--> 
                        
                        <asp:RadioButtonList   ID= "RadioButton1 "     runat= "server "   RepeatDirection= "Horizontal "> </asp:RadioButtonList> 
                      </div> 
                </ItemTemplate> 
                <AlternatingItemTemplate>                 <div> 
                        <!--问题--> 
                      <asp:Label   ID= "q "   runat= "server ">   <%#   Eval( "qus ")   %> </asp:Label> 
                        <!--选项--> 
                        <asp:RadioButtonList   ID= "RadioButton1 "     runat= "server "   RepeatDirection= "Horizontal "> </asp:RadioButtonList> 
                      </div>             </AlternatingItemTemplate> 
            </asp:Repeater> 
            <asp:Button   ID= "Button1 "   runat= "server "   OnClick= "Button1_Click "   Text= "Button "   /> 
        </form> 
    </body> 
    </html> 
    using   System; 
    using   System.Data; 
    using   System.Configuration; 
    using   System.Collections; 
    using   System.Web; 
    using   System.Web.Security; 
    using   System.Web.UI; 
    using   System.Web.UI.WebControls; 
    using   System.Data.SqlClient; 
    using   System.Web.UI.HtmlControls; public   partial   class   Default18   :   System.Web.UI.Page 
    { 
        string[]   s   =   {   "A ",   "B ",   "C ",   "D "   }; 
        protected   void   Page_Load(   object   sender,   EventArgs   e   ) 
        { 
            if   (!IsPostBack) 
            { 
                string   connstring   =   "Data   Source=(local);Initial   Catalog=Book;User   Id=sa;Password=; "; 
                SqlConnection   wtConn   =   new   SqlConnection(connstring); 
                wtConn.Open(); 
                SqlCommand   Command   =   new   SqlCommand( "select   qus,auc01,auc02,auc03,auc04   from   wenti ",   wtConn); 
                SqlDataReader   reader   =   Command.ExecuteReader(); 
                Repeater1.DataSource   =   reader; 
                Repeater1.DataBind(); 
                reader.Close(); 
                wtConn.Close();         } 
        } 
        protected   void   Button1_Click(   object   sender,   EventArgs   e   ) 
        { 
            foreach   (RepeaterItem   i   in   Repeater1.Items) 
            { 
                Response.Write( " <hr/> 问题：   "   +   ((Label)i.FindControl( "q ")).Text); 
                Response.Write( "选择： "   +   ((RadioButtonList)i.FindControl( "RadioButton1 ")).SelectedValue); 
            } 
        } 
        protected   void   Repeater1_ItemDataBound(   object   sender,   RepeaterItemEventArgs   e   ) 
        { 
            if   (e.Item.ItemType   ==   ListItemType.Item   ||   e.Item.ItemType   ==   ListItemType.AlternatingItem) 
            { 
                System.Data.Common.DbDataRecord   d   =   (System.Data.Common.DbDataRecord)e.Item.DataItem; 
                RadioButtonList   r   =   (RadioButtonList)e.Item.FindControl( "RadioButton1 "); 
                for   (int   i   =   0   ;   i   <   4   ;   i++) 
                { 
                    r.Items.Add(new   ListItem(s[i],   d[i   +   1].ToString())); 
                } 
            } 
        } 
    }