Admin/EditCourse.aspx.cs

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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;
using System.Data.SqlClient;
public partial class Admin_EditCourse : System.Web.UI.Page  
{
    public string sql, dID;

    SqlHelper data = new SqlHelper();
    protected void Page_Load(object sender, EventArgs e)
    {
        
        if (!IsPostBack)
        {
            if (Session["UserName"] != null)
            {
                string typeId  = Request.QueryString["id"];
                if (typeId == "1")
                {
                    Label1.Text = "修改课程介绍";
                }
                if (typeId == "2")
                {
                    Label1.Text = "修改学习目的";
                }
                if (typeId == "3")
                {
                    Label1.Text = "修改学习内容";
                }
                DropDownList1.Enabled = false;
                sql = "select * from CourseInfo where typeId='"+typeId+"'";
                getdata(sql);
            }
            else
            {
                Response.Redirect("login.aspx");
            }

        }
    }
    private void getdata(string sql)
    {
        SqlDataReader dr = data.GetDataReader(sql);
        if (dr.Read())
        {
            title.Text = dr["Title"].ToString();
            txtId.Text = dr["Id"].ToString();
            DropDownList1.SelectedValue =dr["TypeId"].ToString();
            FCKeditor1.Value = dr["CourseContent"].ToString();
        }

    }
    protected void Button1_Click(object sender, EventArgs e)