Question

此代码应该使用mvc3 controller

下载文件

public FilePathResult GetFileFromDisk(String file)
{
     String path = AppDomain.CurrentDomain.BaseDirectory + "AppData/";
     String contentType = "text/plain";
     return File(path+file, contentType, file);
}

查看部分：

@Html.ActionLink("Download", "GetFileFromDisk","Upload", new { file = "textfile" },null);

但是，当我点击链接时，我收到此错误

无法找到路径'D：\ Project \ FileUploadDownload \ FileUploadDownload \ AppData \ textfile'的一部分。

[DirectoryNotFoundException：找不到路径'D：\ Project \ FileUploadDownload \ FileUploadDownload \ AppData \ textfile'的一部分。]

为什么foldername在文件路径中重复？请提供解决方案......

Answer 1

试试这样：

public ActionResult GetFileFromDisk(string file)
{
    var appData = Server.MapPath("~/App_Data");
    var path = Path.Combine(appData, file);
    path = Path.GetFullPath(path);
    if (!path.StartsWith(appData))
    {
        // Ensure that we are serving file only inside the App_Data folder
        // and block requests outside like "../web.config"
        throw new HttpException(403, "Forbidden");
    }

    if (!System.IO.File.Exists(path))
    {
        return HttpNotFound();
    }

    var contentType = "text/plain";
    return File(path, contentType, Path.GetFileName(path));
}

使用ASP MVC3进行文件下载时出错

1 个答案: