file is being used by another process in background thread?

Sumit Kumawat

13y2.7kC#

Hi all,

I am working on C# app which is using backgroundworker thread for uploading and downloading the files.

In my code i am using one generic class name "INFO", which contain all information of file which will upload.i am creating one list of "Info" class and i am assigning info class's object to backgroundworker Threads using "ForLoop".Its is working fine but some times it gives an error " The process cannot access the file because it is being used by another process"

I searched on google and found a mechanism "Lock(this)" for lock my files while uploading ,but due to this i faced another issue "uptill all previous threads will not finished their work it will not start newly assigned threads uploading process.

to resolving this issue i found another mechanism on google "Monitor.enter(obj)" ,but again ii faced same issue" The process cannot access the file because it is being used by another process"

Please help me out from this issue thus i will upload newly assigned threads file.

Thanks

2 Replies

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Benjamin Scharbach9y ago
Yes, Lock keyword is like the Monitor in C#. The idea is to lock onto the object that you don't want other threads to access until the critical section is complete.

In your example, I would Lock onto the File object, like stream, you used in your code. And then I would put the File write/read components inside the scope of the Lock() {scope} keyword. This will avoid other threads from gaining access.

Another point, is to use the Using() keyword to force C# to release unmanaged resources which also is preventing the OS from unlocking your file.

Ben Scharbach
https://www.youtube.com/channel/UCih2aBHyGR5cJHApqkwAXBA
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Jaganathan Bantheswaran13y ago
Can you post the code? & point where you are getting error?
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