为System.OutOfMemoryException：上传文件时异常 [英] System.OutOfMemoryException: Exception when uploading a file

问题描述

我上传的文件是84MB，当收到此错误（见下面的错误），但是当我上传了〜60MB的文件，它工作正常。这仅发生在我们2008年的32位虚拟机瓦特/ 4GB的内存。在我的64位R2虚拟机瓦特/ 8GB内存，它工作正常使用甚至130MB的文件。

  

的System.OutOfMemoryException：类型的异常
  'System.OutOfMemoryException的'被抛出。在
  System.IO.BinaryReader.ReadBytes（的Int32数）的
  CustWeb.Controllers.DownloadsController.Create（下载DL，
  HttpPostedFileBase文件）中
  C：\\ ... \\ CustWeb \\ \\控制器DownloadsController.cs：行72

我监视在任务管理器的内存，虽然，在整个上传过程中它永远不会74％以上。

这是在.NET 4.5框架的MVC应用4。

我在我的web.config最高设置在处理上传文件。

 ＆LT;的httpRuntime requestValidationMode =4.5targetFramework =4.5的maxRequestLength =2147483647executionTimeout =84000/＆GT;
 

...

 ＆LT;安全＆GT;
     ＆LT;＆的requestFiltering GT;
         ＆LT; requestLimits maxAllowedContentLength =2147482624/＆GT;
     ＆LT; /＆的requestFiltering GT;
＆LT; /安全＆GT;
 

更新添加$ C $按要求C：

 公众的ActionResult创建（下载DL，HttpPostedFileBase文件）
    {
        尝试
        {
            使用（VAR binaryReader =新BinaryReader（file.InputStream））
            {
                dl.FileBytes = binaryReader.ReadBytes（file.ContentLength）;
            }
            dl.FileContentType = file.ContentType;
            dl.FileName = file.FileName;
            dl.Insert（）;
            成功（＆LT;强＆gt;中+ dl.Label +＆LT; / STRONG方式＆gt;创建并上传成功）;
            返回RedirectToAction（「指数」）;
        }
        赶上（异常前）
        {
            的SelectList名单=新的SelectList（新DownloadType（）GetDownloadTypes（），ID，名）;
            ViewBag.DownloadTypeList =清单;
            误差（ex.ToString（））;
            返回查看（DL）;
        }
    }
 

解决方案

我改变了它从流file.SaveAs和prevented的内存错误。

 公众的ActionResult创建（下载DL，HttpPostedFileBase文件）
    {
        尝试
        {
            字符串TEMPFILE = Path.Combine（使用Server.Mappath（〜/ App_Data文件/）的String.Format（{0} _ {1}，Guid.NewGuid（）。toString（）方法，Path.GetFileName（file.FileName ）））;
            file.SaveAs（临时文件）;
            dl.FileBytes = System.IO.File.ReadAllBytes（临时文件）;
            dl.FileContentType = file.ContentType;
            dl.FileName = file.FileName;
            dl.Insert（）;
            System.IO.File.Delete（临时文件）;
            成功（＆LT;强＆gt;中+ dl.Label +＆LT; / STRONG方式＆gt;创建并上传成功）;
            返回RedirectToAction（「指数」）;
        }
        赶上（异常前）
        {
            的SelectList名单=新的SelectList（新DownloadType（）GetDownloadTypes（），ID，名）;
            ViewBag.DownloadTypeList =清单;
            误差（ex.ToString（））;
            返回查看（DL）;
        }
    }
 

I'm getting this error when uploading a file that is 84MB (see error below) but when I upload a ~60MB file, it works fine. This only occurs on our 32bit 2008 VM w/ 4GB memory. On my R2 64bit VM w/8GB memory, it works fine with even 130MB file.

System.OutOfMemoryException: Exception of type 'System.OutOfMemoryException' was thrown. at System.IO.BinaryReader.ReadBytes(Int32 count) at CustWeb.Controllers.DownloadsController.Create(Download dl, HttpPostedFileBase file) in c:\...\CustWeb\Controllers\DownloadsController.cs:line 72

I monitored the Memory in the task manager, though, and it never goes above 74% during the entire upload process.

This is an MVC 4 application on the 4.5 .NET framework.

I have the max settings in my web.config in dealing with uploading files.

<httpRuntime requestValidationMode="4.5" targetFramework="4.5" maxRequestLength="2147483647" executionTimeout="84000" />

...

<security>
     <requestFiltering>
         <requestLimits maxAllowedContentLength="2147482624" />
     </requestFiltering> 
</security>

UPDATE Adding code as requested:

    public ActionResult Create(Download dl, HttpPostedFileBase file)
    {
        try
        {
            using (var binaryReader = new BinaryReader(file.InputStream))
            {
                dl.FileBytes = binaryReader.ReadBytes(file.ContentLength);
            }
            dl.FileContentType = file.ContentType;
            dl.FileName = file.FileName;
            dl.Insert();
            Success("<strong>" + dl.Label + "</strong> created and uploaded successfully.");
            return RedirectToAction("Index");
        }
        catch (Exception ex)
        {
            SelectList list = new SelectList(new DownloadType().GetDownloadTypes(), "ID", "Name");
            ViewBag.DownloadTypeList = list;
            Error(ex.ToString());
            return View(dl);
        }
    }

解决方案

I changed it from stream to file.SaveAs and that prevented the memory error.

    public ActionResult Create(Download dl, HttpPostedFileBase file)
    {
        try
        {
            string tempFile = Path.Combine(Server.MapPath("~/App_Data/"), string.Format("{0}_{1}",Guid.NewGuid().ToString(), Path.GetFileName(file.FileName)));
            file.SaveAs(tempFile);
            dl.FileBytes = System.IO.File.ReadAllBytes(tempFile);
            dl.FileContentType = file.ContentType;
            dl.FileName = file.FileName;
            dl.Insert();
            System.IO.File.Delete(tempFile);
            Success("<strong>" + dl.Label + "</strong> created and uploaded successfully.");
            return RedirectToAction("Index");
        }
        catch (Exception ex)
        {
            SelectList list = new SelectList(new DownloadType().GetDownloadTypes(), "ID", "Name");
            ViewBag.DownloadTypeList = list;
            Error(ex.ToString());
            return View(dl);
        }
    }

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