How to solve the error while doing IO operation - The process cannot access the file because it is being used by another process.

Hi All,

I have a question regarding FileStream and StreamWriter. I am doing
the below IO operation in my project .But, it throws the error of "The
process cannot access the file because it is used by another process"
in below highlighted line.


string filePath = "C:/Test/Folder1"
string fileName =
DateTime.Today.Day.ToString() + DateTime.Today.Month.ToString() +
DateTime.Today.Year.ToString();
string fullFilePath = filePath + "_" +
fileName + ".txt";
FileStream fs = new
FileStream(fullFilePath, FileMode.Append, FileAccess.Write);
if (!File.Exists(fullFilePath))
{
fs = new FileStream(fullFilePath,
FileMode.CreateNew, FileAccess.Write);
}
StreamWriter sw = new StreamWriter(fs);
sw.Write("Test" );
sw.Close();
sw.Dispose();
fs.Close();
fs.Dispose();


So, If you know the solution then kindly reply me only. Thanks in advance..:)


Thanks & Regards,
Sanjiv

SOLUTION 1:

Hi Sanjiv,

You have to use using keyword to avoid such access behaviors

string filePath = "C:/Test/Folder1";
string fileName = DateTime.Today.Day.ToString() +
DateTime.Today.Month.ToString() + DateTime.Today.Year.ToString();
string fullFilePath = filePath + "_" + fileName + ".txt";
FileMode _fm = FileMode.Append;

if (!File.Exists(fullFilePath))
_fm = FileMode.CreateNew;

using (FileStream fs = new FileStream(fullFilePath, _fm,
FileAccess.Write))
{
StreamWriter sw = new StreamWriter(fs);
sw.Write("Test");
sw.Close();
sw.Dispose();
fs.Close();
fs.Dispose();
}


More reference


• http://msdn.microsoft.com/en-us/library/yh598w02.aspx

• http://www.codeproject.com/Articles/17106/The-using-Keyword-in-C

-Oli.