ASP.NET MVC 下载图像而不是在浏览器中显示 [英] ASP.NET MVC download image rather than display in browser

问题描述

我不想在浏览器窗口中显示 PNG，而是希望操作结果触发文件下载对话框(您知道打开、另存为等).我可以使用未知的内容类型使其与下面的代码一起使用，但是用户必须在文件名的末尾输入 .png .如何在不强制用户输入文件扩展名的情况下完成此行为?

Rather than displaying a PNG in the browser window, I'd like the action result to trigger the file download dialogue box (you know the open, save as, etc). I can get this to work with the code below using an unknown content type, but the user then has to type in .png at the end of the file name. How can I accomplish this behavior without forcing the user to type in the file extension?

    public ActionResult DownloadAdTemplate(string pathCode)
    {
        var imgPath = Server.MapPath(service.GetTemplatePath(pathCode));
        return base.File(imgPath, "application/unknown");
    }

解决方案......

    public ActionResult DownloadAdTemplate(string pathCode)
    {
        var imgPath = Server.MapPath(service.GetTemplatePath(pathCode));
        Response.AddHeader("Content-Disposition", "attachment;filename=DealerAdTemplate.png");
        Response.WriteFile(imgPath);
        Response.End();
        return null;
    }

推荐答案

我相信您可以通过 content-disposition 标题来控制这一点.

I believe you can control this with the content-disposition header.

Response.AddHeader(
       "Content-Disposition", "attachment; filename="filenamehere.png""); 

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