How to have synchronous writing to a file (Threads) ?
- by bobby
Hi all.
I created and started some Threads that each one writes something to a common text file.
but the following error appears to me:
"The process cannot access the file 'C:\hello.txt' because it is being used by another process."
void AccessFile()
{
int num = 5;
Thread[] trds = new Thread[5];
for (int i = 0; i < num; i++)
{
trds[i] = new Thread(new ParameterizedThreadStart(WriteToFile));
}
for (int i = 0; i < num; i++)
{
trds[i].Start(String.Format("{0}: Hello from thread id:#{1}", i, trds[i].ManagedThreadId));
}
}
void WriteToFile(object message)
{
string FileName = "C:\\hello.txt";
string mess = (string)message;
System.IO.StreamWriter sw = null;
FileStream objStream = null;
sw = File.AppendText(FileName);
if (sw == null)
{
objStream = new FileStream(FileName, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.ReadWrite);
sw = new StreamWriter(objStream);
}
sw.WriteLine(mess);
sw.Close();
sw.Dispose();
}
the AccessFile() method is the starting point.
could any one tell me what should i do?
