无法提示保存对话框以下载MVC中的zip文件

时间:2012-03-22 02:40:42

标签: asp.net-mvc jqgrid

我的MVC视图中有jqgrid,它显示可用文件的数量。在选择jqGrid的每一行中的复选框后,用户可以以zip格式下载单个文件或多个文件。单个文件下载工作正常,并能够提示用户保存文件但是当我以zip格式下载文件时,我没有得到任何保存提示将文件保存在客户端计算机上。 Zip文件在文件夹中正常创建,但没有提示保存。我不知道我在哪里做错了。请参阅以下代码并在此问题上帮助我....

    **Controller**
    [HttpGet]
    public ActionResult DownloadZip(String[] filesToZip)
    {
        //checking if there any file to zip
        if (filesToZip == null || filesToZip.Length < 1 || filesToZip.Count() == 0)
            return (new EmptyResult());

        //creating dynamic zip file name
        var downloadFileName = string.Format("Test_{0}.zip", DateTime.Now.ToString("yyyy-MM-dd-HH_mm_ss"));

        //zipping the files
        using (ZipOutputStream zipos = new ZipOutputStream(System.IO.File.Create(Path.Combine(Server.MapPath(uploadLocation), downloadFileName))))
        {
            // 0-9, 9 being the highest compression
            zipos.SetLevel(9);

            //temp buffer to hold 4gb data max
            byte[] buffer = new byte[4096];

            foreach (string file in filesToZip)
            {
                ZipEntry newEntry = new ZipEntry(Path.GetFileName(file));
                zipos.PutNextEntry(newEntry);

                using (FileStream fs = System.IO.File.OpenRead(file))
                {
                    int sourceBytes;
                    do
                    {
                        sourceBytes = fs.Read(buffer, 0, buffer.Length);
                        zipos.Write(buffer, 0, sourceBytes);
                    }
                    while (sourceBytes > 0);
                }
            }//end files loop
        }


        System.IO.FileInfo zipFile = new System.IO.FileInfo(Path.Combine(Server.MapPath(uploadLocation), downloadFileName));

        // clear the current output content from the buffer
        Response.Clear();

        // add the header that specifies the default filename for the 
        // Download/SaveAs dialog 
        Response.AddHeader("Content-Disposition", "attachment; filename=" + downloadFileName);

        // add the header that specifies the file size, so that the browser
        // can show the download progress
        Response.AddHeader("Content-Length", zipFile.Length.ToString());

        // specify that the response is a stream that cannot be read by the
        // client and must be downloaded
        Response.ContentType = "application/zip";
        // send the file stream to the client
        Response.WriteFile(zipFile.FullName);


        //ControllerContext.HttpContext.Response.AddHeader("content-disposition", "attachment; filename=" + downloadFileName);
        //return File(Path.Combine(Server.MapPath(uploadLocation), downloadFileName), "application/zip", downloadFileName);

        return (new EmptyResult());
   }

   **View**

            $("#btnDownloadZip").click(function () {

                var files = $("#list").jqGrid('getGridParam', 'selarrrow').toString();

                if (files == '') {
                    alert('Please select a file to download...');
                    return;
                }

                var fileList = files.split(",");

                $.post('<%= Url.Action("DownloadZip") %>', { filesToZip: fileList }, handleSuccess);

                //$.getJSON("/Home/DownloadZip/", { filesToZip: fileList });
            });
     function handleSuccess()
     {
     }

1 个答案:

答案 0 :(得分:0)

Asp.Net MVC有一个函数名文件,您可以使用它来从控制器操作返回文件。

请参阅显示如何返回文件的this问题