info.aspx.cs

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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;
using System.IO;
namespace 作业
{
    public partial class info : System.Web.UI.Page
    {
        static string connstr = System.Configuration.ConfigurationManager.AppSettings["ConnectionString"];//定义静态链接数据库参数
        SqlConnection Conn = new SqlConnection(connstr);//定义连接SQL数据库连接对象conn
        protected void Page_Load(object sender, EventArgs e)
        {
             if(!IsPostBack)
             {
                 bind();
                 this.txt_name.Text = Session["name"].ToString();
                 this.txt_xh.Text = Session["user"].ToString();
                 
             }
        }
        //
        public void bind()
        {
            int id = int.Parse(Request.QueryString["id"].ToString());
            string sql = "select * from zuoye where zuoye_id="+id;
            SqlCommand cmd = new SqlCommand(sql, Conn);//创建一个command对象，装载的参数分别是SQL语句和一个连接对象Conn
            SqlDataAdapter da = new SqlDataAdapter();//建立一个数据连接器
            da.SelectCommand = cmd;//da的选择COMMAND对象是cmd
            DataSet ds = new DataSet();//建立一个dataset
            da.Fill(ds, "zuoye");//数据适配器向ds中装载表depart
            DataTable dt = ds.Tables["zuoye"];//建立一个datatable对象dt,他的实例是da中的表zuoye;
            this.lb_kc.Text = dt.Rows[0]["kc"].ToString();
            this.lb_title.Text = dt.Rows[0]["title"].ToString();
            this.lb_first.Text = dt.Rows[0]["first_date"].ToString();
            this.lb_end.Text = dt.Rows[0]["end_date"].ToString();
        }
        //
        protected void Button1_Click(object sender, EventArgs e)
        {
            int id = int.Parse(Request.QueryString["id"].ToString());
            string sql = "select * from zuoye where zuoye_id="+id;
            SqlCommand cmd = new SqlCommand(sql, Conn);//创建一个command对象，装载的参数分别是SQL语句和一个连接对象Conn
            SqlDataAdapter da = new SqlDataAdapter();//建立一个数据连接器
            da.SelectCommand = cmd;//da的选择COMMAND对象是cmd
            DataSet ds = new DataSet();//建立一个dataset
            da.Fill(ds, "zuoye");//数据适配器向ds中装载表depart
            DataTable dt = ds.Tables["zuoye"];//建立一个datatable对象dt,他的实例是da中的表zuoye;
            string filename = dt.Rows[0]["pic"].ToString();
            Response.ContentType = "application/ms-download";
            System.IO.FileInfo file = new System.IO.FileInfo(Server.MapPath(filename));//upload文件夹中存放了上传的资源文件,这里为资源文件的路径
            Response.Clear();
            Response.AddHeader("Content-Type", "application/octet-stream");
            Response.Charset = "utf-8";
            Response.AddHeader("Content-Disposition", "attachment;filename=" + System.Web.HttpUtility.UrlEncode(file.Name, System.Text.Encoding.UTF8));
            Response.AddHeader("Content-Length", file.Length.ToString());