[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" />
<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();
[解决办法]
//是否做了回传判断
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
//绑定数据
}
}
[解决办法]
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()));
}
}
}
}
