c# - 使用 Asp.Net FileUpload 控件时，上传的文件在保存之前位于何处？

Question

当您上传文件时，我试图确定 Asp.Net 和/或 IIS 将文件上传存储在何处但是，然后再调用 SaveAs() 方法。

我看了MSDN我有点明白它在内存中而不是放在文件系统中，但我在任何明确说明这一点的地方都找不到它。

我正在尝试向 IT 部门验证我们的服务器复制系统不会自动复制上传的文件(其流会传递到 FTP，而无需调用 SaveAs())。

Answer 1

以下内容来自How to change the default TempFile upload location for the ASP.NET 2.0 FileUpload control?

Dumping out the HttpRawUploadedContent from a memory dump, I can see that the file is buffered in the C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\fileupload20\d909613c\d78e07ba\uploads files folder and is called f-zqaz-r.post 


0:008> !do 017c3fbc 
Name: System.Web.HttpRawUploadedContent+TempFile
MethodTable: 68a870e0
EEClass: 68a87070
Size: 20(0x14) bytes
GC Generation: 0
 (C:\WINDOWS\assembly\GAC_32\System.Web\2.0.0.0__b03f5f7f11d50a3a\System.Web.dll)
Fields:
      MT    Field   Offset                 Type VT     Attr    Value Name
7a754a14  4000fb0        4 ...empFileCollection  0 instance 017c4944 _tempFiles
790fa3e0  4000fb1        8        System.String  0 instance 017c54e4 _filename
790fe3c8  4000fb2        c     System.IO.Stream  0 instance 017c55f8 _filestream


0:008> !do 017c54e4 
Name: System.String
MethodTable: 790fa3e0
EEClass: 790fa340
Size: 262(0x106) bytes
GC Generation: 0
 (C:\WINDOWS\assembly\GAC_32\mscorlib\2.0.0.0__b77a5c561934e089\mscorlib.dll)
String: C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\fileupload20\d909613c\d78e07ba\uploads\f-zqaz-r.post


If you want to change the default location, The tempDirectory attribute of the <compilation> element allows you to specify the directory to use for temporary file storage during compilation. The default is an empty string (""). In the case of an empty string, and if the current process has the required access permissions, the files are stored in the %FrameworkInstallLocation%\ Temporary ASP.NET Files directory.

compilation Element (ASP.NET Settings Schema)显示 compilation 元素，其中 tempDirectory 属性在上传过程中保存临时文件的位置。