ASP.NET MVC3：通过控制图像加载 [英] ASP.NET MVC3: Image loading through controller

问题描述

我尝试使用答案从这里 ，但没有奏效。我有以下的code：

I tried using the answer from here, but it did not work. I have the following code:

public ActionResult ShowImage() 
{
    using (FileStream stream = new FileStream(Path.Combine(Server.MapPath("/App_Data/UserUpload/asd.png")), FileMode.Open))
    {
        FileStreamResult result = new FileStreamResult(stream, "image/png");
        result.FileDownloadName = "asd.png";
        return result;
    }

}

当我打开网页，我得到它说的错误：无法访​​问已关闭的文件。我做了错误的一些使用Google，但我只发现上传有关这个错误。这里是什么导致了这个问题？

When I open up the page I get an error which says: "Cannot access a closed file.". I did some googling on the error, but I only found this error associated with uploading. What causes the issue here?

推荐答案

尝试这样的：

public ActionResult ShowImage() 
{
    var file = Server.MapPath("~/App_Data/UserUpload/asd.png");
    return File(file, "image/png", Path.GetFileName(file));
}

或者如果你想要一个单独的文件名：

or if you want a separate filename:

public ActionResult ShowImage() 
{
    var path = Server.MapPath("~/App_Data/UserUpload");
    var file = "asd.png";
    var fullPath = Path.Combine(path, file);
    return File(fullPath, "image/png", file);
}

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