用mvc下载文件

Question

I need to allow the user on my site to download a file (xml File)

I tried

 public FileResult DownloadFile(string fileid)
 {
     if (!string.IsNullOrEmpty(fileid))
     {            
         byte[] fileBytes = Encoding.ASCII.GetBytes(FileData);
         return File(fileBytes, System.Net.Mime.MediaTypeNames.Application.Octet,FileName + ".bccx");
     }
         return null;
 }

ajax:

function downloadFile(id) {
        $.ajax({
            url: sitePath + "Controller/DownloadFile?fileid=" + id,
            type: 'post',
            asysnc: false
        })
        .done(function () {

        });
}

but nothing is downloaded

Answer 1

Here is a way I accomplish downloading, hope that helps.

$.ajax({
            url: sitePath + "Controller/DownloadFile?fileid=" + id,
            type: 'GET',
            success: function (filename) { //I return the filename in from the controller
                frame = document.createElement("iframe");
                frame.id = "iframe";
                frame.style.display = 'none';
                frame.src = '/FileDirectory?fileName=' + filename; //the path to the file
                document.body.appendChild(frame);
            },
            cache: false,
            contentType: false,
            processData: false
        });