Response use the WriteFile method to output files

protected void Page_Load(object sender, EventArgs e)

    {

    }

    protected void Button1_Click(object sender, EventArgs e)

    {

        Response.WriteFile("TextFile.txt");

    }

    protected void Button2_Click(object sender, EventArgs e)

    {

        string path = Server.MapPath("~/字符串专题.doc");//文件的路径

        System.IO.FileInfo file = new System.IO.FileInfo(path);

        Response.Clear (); 

        the Response.Charset = " UTF-. 8 " ; // encoded output provided 

        Response.ContentEncoding = System.Text.Encoding.UTF8; 

        // add header information, is "file download / Save As" dialog specifies the default file name    

        Response.AddHeader ( " Content-Disposition " , " Attachment; filename = " + Server.UrlEncode (file.name)); 

        // add header information, specify the file size, so that the browser can display the download progress    

        Response. the AddHeader ( " the Content-the Length " , file.Length.ToString ()); 

        // the specified stream is returned to a client can not be read, must be downloaded   

        Response.ContentType = " file application / MSWord " ; 

        // the file stream to the client    

        Response.WriteFile (file.FullName); 

        Response.End (); 

     //    Response.WriteFile ( "Test.doc"); 

    } 

 

 

can also be used the method of opening the file directly following: 

            ScriptManager.RegisterStartupScript (Page, Page.GetType (), "" , " the window.open ( ' " + string_FileRelativePath + " ', '_blank'); " , to true );