How to close file stream

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Hi , I upload a file like below.

C#

File_Upload.PostedFile.SaveAs(Server.MapPath("L:/.../a.jpg"));

And i would like to delete my file with the below code.

C#

System.IO.File.Delete("L:/.../a.jpg");

I faced to this error :

The process cannot access the file 'L:\chikardarin Website\WebApplication2\image_Logo\16_honda-cars-logo-emblem.jpg' because it is being used by another process.

Please help me how can i close this stream to perform my delete action ???

Edit :

my exact upload code is :

C#

string fileName = Path.GetFileName(File_Upload.PostedFile.FileName);
string imgid = "car";
string path = (ConfigurationManager.AppSettings["virtual_path"]).ToLower();
path = path + ImgId + "_" + fileName;
File_Upload.PostedFile.SaveAs(Server.MapPath(path));

now which is my resource ? is my way to upload file true ?

Posted 14-Oct-14 3:47am

Member 11125813

Updated 14-Oct-14 5:31am

v4

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ZurdoDev 14-Oct-14 9:49am

My guess is you might have other code doing something with that file. Is there a reason you are deleting it right after uploading it?

Member 11125813 14-Oct-14 11:25am

upload action is inside one button and delete action is in another button . and i do nothing with my file which is an image . no any resize and nothing else . i just add its name into database thats all .

ZurdoDev 14-Oct-14 11:29am

I have used fileupload many times and have never had this issue. I imagine it is IIS holding on to the file. You may want to iisreset and try delete again to make sure it actually is IIS holding onto it and not something else.

Dominic Burford 14-Oct-14 10:03am

Between uploading the file and deleting it, what else are you doing with the file? Are you performing some other action on the file? Clearly some other process still has a lock on the file.

Member 11125813 14-Oct-14 11:25am

i do nothing with my file which is an image . no any resize and nothing else . i just add its name into database thats all .

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Sergey Alexandrovich Kryukov · Answer 1 · 2014-10-14T11:45:00

Solution 2

Please see my past answer on this problem: how to compress the error 'it is already used by another process' in vb.net[^].

—SA

Posted 14-Oct-14 11:45am

Sergey Alexandrovich Kryukov

Afzaal Ahmad Zeeshan · Answer 2 · 2014-10-14T04:09:00

Solution 1

I cannot tell you which code might be consuming the resource file. But, however, you can use this method to close the resource.

C#

resource.Close();

Mostly, streams show this kind of behaviour and you can close them once you're done working.

Recommendation

I would like to recommend you that you should use the using block while working with the resource. This ensures the correct disposal or resources, or to be technically speaking, IDisposable objects. For more, please read this document. http://msdn.microsoft.com/en-us/library/yh598w02.aspx[^]

Posted 14-Oct-14 4:09am

Afzaal Ahmad Zeeshan

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Member 11125813 14-Oct-14 11:31am

I edited my question . please reffer to the edit part . thank you

Afzaal Ahmad Zeeshan 15-Oct-14 10:43am

You can see the Solution 2 for this. Servey has added the details in his previous answer, by using which you can easily get the process which is using the file.

Also note that, you must be viewing the previous answer, not this one.

Sergey Alexandrovich Kryukov 14-Oct-14 17:48pm

You are right about "using", it should be the first option mentioned and explained: the end of "using" block automatically calls IDisposable.Dispose(). (I up-voted the answer with 4.)
However, we don't really know exactly what is the reason for "used by another process". This is easy to detect, if OP uses Solution 2, please see.
—SA

Afzaal Ahmad Zeeshan 15-Oct-14 10:42am

Thanks for that. Since I didn't know that method to check which process is using it, I didn't add any vague information here. The interesting part was, somewhat the answer of mine matched to your answer and that using this also.

Also thanks for upvoting my (half) answer. And for your previous answer, I am going to give a 5. And would link it, in my answer to guide the OP in the right path.