如何在 ASP.NET Web API 中设置下载文件名 [英] How to set downloading file name in ASP.NET Web API

问题描述

在我的 ApiController 类中，我有以下方法来下载服务器创建的文件.

In my ApiController class, I have following method to download a file created by server.

public HttpResponseMessage Get(int id)
{
    try
    {
        string dir = HttpContext.Current.Server.MapPath("~"); //location of the template file
        Stream file = new MemoryStream();
        Stream result = _service.GetMyForm(id, dir, file);
        if (result == null)
        {
            return Request.CreateResponse(HttpStatusCode.NotFound);
        }
        result.Position = 0;
        HttpResponseMessage response = new HttpResponseMessage();
        response.StatusCode = HttpStatusCode.OK;
        response.Content = new StreamContent(result);
        return response;
    }
    catch (IOException)
    {
        return Request.CreateResponse(HttpStatusCode.InternalServerError);
    }
}

除了默认的下载文件名是它的 id 外，一切都运行得很完美，所以用户可能每次都必须在另存为对话框中输入他/她自己的文件名.有没有办法在上面的代码中设置默认文件名?

Everything is working perfect except that default downloading file name is its id so user might have to type his/her own file name at save as dialog each time. Is there any way to set a default file name in the code above?

推荐答案

您需要在 HttpResponseMessage 上设置 Content-Disposition 标头:

You need to set the Content-Disposition header on the HttpResponseMessage:

HttpResponseMessage response = new HttpResponseMessage();
response.StatusCode = HttpStatusCode.OK;
response.Content = new StreamContent(result);
response.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment")
{
    FileName = "foo.txt"
};

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