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I have two different modules that need access to a single file (One will have ReadWrite Access - Other only Read). The file is opened using the following code in one of the modules:
FileStream fs1 = new FileStream(@"D:\post.xml", FileMode.Open, FileAccess.ReadWrite, FileShare.Read);
Th problem is that the second module fails while trying to open the same file using the following code:
FileStream fs = new FileStream(@"D:\post.xml", FileMode.Open, FileAccess.Read);
Do I need to set some additional security parameters here?
302
Just use FileMode. Open or FileMode. Truncate to overwrite the file: namespace System.IO { // // Summary: // Specifies how the operating system should open a file.
This can happen if the file referenced is open in another program or if a crash occurs while uploading. To resolve it, first make sure that no users have the file open anywhere, then reboot the machine to make sure it is not open as a remnant from a crash.
The FileStream is a class used for reading and writing files in C#. It is part of the System.IO namespace. To manipulate files using FileStream, you need to create an object of FileStream class. This object has four parameters; the Name of the File, FileMode, FileAccess, and FileShare.
Stream is a representation of bytes. Both these classes derive from the Stream class which is abstract by definition. As the name suggests, a FileStream reads and writes to a file whereas a MemoryStream reads and writes to the memory. So it relates to where the stream is stored.
On the FileStream that only READS the file, you need to set it as
FileShare.ReadWrite
FileStream fs = new FileStream(@"D:\post.xml", FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
other wise the original FileStream would not be able to write back to it...its just a volley back and forth between the two streams, make sure you hand back what the other needs
145
When opening the second FileStream, you also need to specify FileShare.Read, otherwise it will try to open it with exclusive access, and will fail because the file is already open
28
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