ASP.NET MVC3:通过控制器加载图像 [英] ASP.NET MVC3: Image loading through controller

问题描述

我尝试使用来自此处的答案，但没有奏效.我有以下代码:

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;
    }

}

当我打开页面时，我收到一条错误消息:无法访问已关闭的文件.".我对错误进行了一些谷歌搜索，但我只发现此错误与上传相关.是什么导致了这里的问题?

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

试试这个:

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);
}

这篇关于ASP.NET MVC3:通过控制器加载图像的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！