Question

ASP.net中RadioButtonList控件出现的这个问题怎么解决？急！

SqlConnection con = new SqlConnection("data source=.;initial catalog=SMS;Integrated Security=true");

con.Open();
string sql;

if (RadioButtonList.SelectedValue ==“”)
{
sql = "select * from Student order by Stuid";

}
else
{
sql = "select * from Student order by Stuname";

}
SqlDataAdapter da = new SqlDataAdapter(sql, con);
DataSet ds = new DataSet();
da.Fill(ds);
GridView1.DataSource = ds;
GridView1.DataBind();
con.Close();
我在CliCK中输入下面的代码 老是提醒我说没有RadioButtonList这个控件，但是这个控件明显就在页面里存在着，重新拖放，换该页面都试过了，就是不行，想请教高手们来给我指导一下，谢谢！
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.SqlClient;

public partial class sna : System.Web.UI.Page
{
protected void Button1_Click(object sender, EventArgs e)
{
SqlConnection con = new SqlConnection("data source=.;initial catalog=SMS;Integrated Security=true");
con.Open();
string sql;
if (RadioButtonList1.SelectedValue ==“sno”)//RadioButton里面有两个值：sno sna
{
sql = "select * from Student order by Stuid";
}
else
{
sql = "select * from Student order by Stuname";
}
SqlDataAdapter da = new SqlDataAdapter(sql, con);
DataSet ds = new DataSet();
da.Fill(ds);
GridView1.DataSource = ds;
GridView1.DataBind();
con.Close();
}
}

Answer 1

这样的话。可以把你ASPX页面的代码传上来看下吗？

Answer 2

RadioButtonList这个和页面里的ID的值是一样的吗？

Answer 3

你的RadioButtonList1 里都有什么东西哦。