Admin/XsEdit.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.IO;

public partial class Admin_XsEdit : System.Web.UI.Page
{
    public string strPic = "";
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!Page.IsPostBack)
        {
            //绑定班级信息
            DropDownList1.DataTextField = "班级名称";
            DropDownList1.DataValueField = "班级代码";
            DropDownList1.DataSource = db.GetData("select * from 班级");
            DropDownList1.DataBind();

            if (Request.QueryString["ID"] != null)
            {
                //显示当前的学生信息


                DataTable dt = new DataTable();
                TextBox1.ReadOnly = true;
                dt = db.GetData("select * from 学生 where 学号=" + Request.QueryString["ID"] + "");
                if (dt.Rows.Count > 0)
                {
                    this.TextBox1.Text = dt.Rows[0]["学号"].ToString();
                    this.TextBox2.Text = dt.Rows[0]["姓名"].ToString();
                    this.TextBox3.Text = dt.Rows[0]["性别"].ToString();
                    this.TextBox4.Text =dt.Rows[0]["入学时间"].ToString();
                    this.DropDownList1.SelectedValue = dt.Rows[0]["班级代码"].ToString();
                    strPic = @"STU\" + dt.Rows[0]["照片"].ToString();
                    this.Hidden1.Value = dt.Rows[0]["照片"].ToString();
                }
            }
        }
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        //跳转页面
        Response.Redirect("XsList.aspx");
    }
    protected void Button2_Click(object sender, EventArgs e)
    {
        string FileName = "";
        string FileName1;
        string DPath;
        if (Server.MapPath("").Substring(Server.MapPath("").Length - 1, 1) == @"\")
        {
            DPath = Server.MapPath("");
        }