文件的上传与下载 C#

文件的上传：后台代码

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 Default2 : System.Web.UI.Page

{

    protected void Page_Load(object sender, EventArgs e)

    {

        //绑定datalist

            SqlConnection con = new SqlConnection("Server=.;DataBase=test;uid=sa;pwd=");

            con.Open();

            SqlCommand cmd = new SqlCommand("select * from test1", con);

            SqlDataReader sdr = cmd.ExecuteReader();

            this.DataList1.DataSource = sdr;

            this.DataList1.DataKeyField = "name";

            this.DataList1.DataBind();

            con.Close();

    }

    protected void UploadFile(object sender, EventArgs e)

    {

        //检查上传文件不为空

        if (myFile.PostedFile != null)