利用Response的WriteFile方法输出一些文件

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();

        Response.Charset = "utf-8";//设置输出的编码

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

        // 添加头信息，为"文件下载/另存为"对话框指定默认文件名   

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

        // 添加头信息，指定文件大小，让浏览器能够显示下载进度   

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

        // 指定返回的是一个不能被客户端读取的流，必须被下载   

        Response.ContentType = "application/msword";

        // 把文件流发送到客户端   

        Response.WriteFile(file.FullName);

        Response.End();

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

    }

 

 

也可用下面的方法直接打开文件：

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