我在我的网站上添加了一个链接来下载图像。当我点击链接时,我希望下载自动启动。
目前,当我点击链接时,我收到了回复消息:示例:
StatusCode:200,ReasonPhrase:'OK',版本:1.1,内容:System.Net.Http.PushStreamContent,标题:{Content-Type:application / octet-stream Content-Disposition:attachment; filename = 895621d7-57a4-47a5-8dc5-ae36a2623826Banneraaaaaaaa.jpg}
如何修改以下代码以自动开始下载。我想我可能会回错类型:
这是我的代码:
public HttpResponseMessage DownloadImageFile(string filepath)
{
filepath = "https://mysite.com/" + filepath;
try
{
var response = new HttpResponseMessage();
response.Content = new PushStreamContent((Stream outputStream, HttpContent content, TransportContext context) =>
{
try
{
DownloadFile(filepath, outputStream);
}
finally
{
outputStream.Close();
}
});
response.Content.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue("application/octet-stream");
response.Content.Headers.ContentDisposition = new System.Net.Http.Headers.ContentDispositionHeaderValue("attachment");
response.Content.Headers.ContentDisposition.FileName = Path.GetFileName(filepath);
return response;
}
catch (Exception ex)
{
}
return null;
}
public void DownloadFile(string file, Stream response)
{
var bufferSize = 1024 * 1024;
using (var stream = new FileStream(file, FileMode.Open, FileAccess.Read))
{
var buffer = new byte[bufferSize];
var bytesRead = 0;
while ((bytesRead = stream.Read(buffer, 0, bufferSize)) > 0)
{
response.Write(buffer, 0, bytesRead);
}
response.Flush();
}
}
}
答案 0 :(得分:2)
您应该使用Controller.File重载之一。 File()帮助器方法提供对返回文件内容的支持。 MediaTypeNames类可用于获取特定文件扩展名的MIME类型。
例如:
public FileResult Download(string fileNameWithPath)
{
// Option 1 - Native support for file read
return File(fileNameWithPath, System.Net.Mime.MediaTypeNames.Application.Octet, Path.GetFileName(fileNameWithPath));
// Option 2 - Read byte array and pass to file object
//byte[] fileBytes = System.IO.File.ReadAllBytes(fileName); return
//File(fileBytes, System.Net.Mime.MediaTypeNames.Application.Octet,
//fileName);
}