<link title="指定分配" url="teacher_assign_appoint.aspx"></link>
用一个wizard控件
1、选择老师

2、选择老师的课题

3、选择学生

选择了老师然后就选择那个老师的课题！然后就到那个老师选择学生！可是怎么才能知道那些学生选择了这个老师呢？还有他们分别是选了那些课题？
应该用什么控件用什么程序呢？那个思路应该怎么样的呢？这个是我做的程序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.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

public partial class BS_teacher_assign_appoint : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void Wizard1_ActiveStepChanged(object sender, EventArgs e)
    {
        if (Wizard1.ActiveStepIndex == 1)
        {
            sdsProjects.SelectCommand = "SELECT [PNAME] FROM [KYProjects] WHERE PRINAME='" + DropDownList2.SelectedValue + "'";
            //sdsProjects.SelectParameters.Add("PRINAME",);
            ddlProjects.DataBind();
        }
    }
}