ASP.NET MVC3：通过控制器加载图像

发布于 2024-11-13 08:01:59 字数 536 浏览 0 评论 0原文

我尝试使用此处的答案，但它不起作用。我有以下代码：

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;
    }

}

当我打开页面时，出现错误：“无法访问已关闭的文件。”。我对这个错误进行了一些谷歌搜索，但我只发现这个错误与上传相关。这里出现问题的原因是什么？

原文

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;
    }

}

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?

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止于盛夏 2024-11-20 08:01:59

尝试这样：

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

或者如果您想要一个单独的文件名：

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);
}

Try like this:

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

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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