Admin/Modify_BanJi.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_Modify_BanJi : System.Web.UI.Page
{
    SqlHelper data = new SqlHelper();
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            Getxueyuan();
            SqlDataReader dr = data.GetDataReader("select * from BanJi where id=" + Request.QueryString["id"].ToString());
            if (dr.Read())
            {

                TextBox1.Text = dr["name"].ToString();

            }
        }
    }
    private void Getxueyuan()
    {

        DropDownList1.DataSource = data.GetDataReader("select * from  zhuanye");
        DropDownList1.DataTextField = "Name";
        DropDownList1.DataValueField = "id";
        DropDownList1.DataBind();



    }
    protected void btnAdd_Click(object sender, EventArgs e)
    {
        data.RunSql("update BanJi set  name='" + TextBox1.Text + "', Zhuanyeid='" + DropDownList1.SelectedValue + "',Zhuanyename='" + DropDownList1.SelectedItem.Text + "'  where id=" + Request.QueryString["id"].ToString());
        Alert.AlertAndRedirect("修改成功", "banJiManger.aspx");
    }
}