C#ASPX从本地主机下载文件

WebClient req = new WebClient();
HttpResponse Response = HttpContext.Current.Response;
Response.ContentType = "image/jpeg";
Response.AddHeader("Content-Disposition", "attachment;filename=" +
    fileName);
Response.WriteFile("C:\Temp\Storage\" + (fileName));
Response.End();

private void btnDownload_Click(object sender, EventArgs e)
{
    WebClient webClient = new WebClient();
    webClient.DownloadFileCompleted += new AsyncCompletedEventHandler(Completed);
    webClient.DownloadProgressChanged += new DownloadProgressChangedEventHandler(ProgressChanged);
    webClient.DownloadFileAsync(new Uri("http://NikUser.com/myfile.txt"), @"c:myfile.txt");
}

试试看。。。。希望它能起作用。。。