Re: is there any way to clear the buffer of a System.IO.StreamWriter so that it does not do a flush when it is closed in the finaly block?
- From: "Lloyd Dupont" <net.galador@ld>
- Date: Thu, 29 Sep 2005 12:10:15 +1000
>I have not tested this for network failure, but something like this might
>work. This will try three times to write the data and then throw
>exception.
unfortunately I doubt it will fix this (very interesting) problem.
has he said he was using 'using(Stream = ....)'
and the he was unable to create the file again.
very nasty.....
anyway it's a well known fact Windows often lock up file for some unknown
reason....
I get process explorer to kill all anoying such beast... too bad it can't
work in this case...
> Even if you get an exception in Flush, it should try again. You may to
> add a Thread.Sleep(500) or something in the while loop after exception to
> allow network stuff to settle down, before you try again in a tight loop.
> The normal path will just write the data and return.
>
> public void DoWrite()
> {
> string path = @"\\8.3.35.139\netdistest\mb30file.txt";
>
> // Create request.
> System.Text.StringBuilder sb = new
> System.Text.StringBuilder(1000);
> for ( int i = 0; i < 100; i++ )
> {
> sb.Append("0");
> }
> string request = sb.ToString();
>
> int failCount = 0;
> while ( true )
> {
> try
> {
> WriteFile(path, request);
> return;
> }
> catch ( Exception ex )
> {
> failCount++;
> if ( failCount >= 2 ) // Try 3 times to write the
> data, then give up.
> throw ex;
> }
> }
> }
>
> private void WriteFile(string path, string data)
> {
> using ( StreamWriter sw = new StreamWriter(path) )
> {
> sw.Write(data);
> }
> }
>
> --
> William Stacey [MVP]
>
> "Daniel" <softwareengineer98037@xxxxxxxxx> wrote in message
> news:%23qJkfVHxFHA.3312@xxxxxxxxxxxxxxxxxxxxxxx
>> when i disconnect the network drive after the file is open an exception
>> is
>> thrown but i can not close the file because the close will try to flush
>> and
>> close it self will throws "The specified network name is no longer
>> available." then if i renable the network drive on the target machien and
>> let it try to send the file again it throws "{"The process cannot access
>> the
>> file "\\11.11.11.11\netdistest\mb30file.txt" because it is being used by
>> another process." }" i dont konw how to free the file up without
>> restarting
>> my .net app seems to fix that but i want to not have to restart my app
>> every
>> time one of my thousands of target computers has a momentary netowork
>> failiure. using the using() clause has the same issue because it tries to
>> close the file and that it self throws the error because close does a
>> flush:
>>
>> public void tProc()
>>
>> {
>>
>> string strTempPath = @"\\8.3.35.139\netdistest\mb30file.txt";
>>
>> System.Text.StringBuilder sb = new System.Text.StringBuilder(1000);
>>
>> for(int i=0;i<100;i++)
>>
>> {
>>
>> sb.Append("0");
>>
>> }
>>
>> string request = sb.ToString();
>>
>> System.IntPtr lasthandle = new System.IntPtr(-1);
>>
>> while(true)
>>
>> {
>>
>> int i2dd3 = 23 + 23;
>>
>> System.IO.TextWriter streamWriter = null;
>>
>> try
>>
>> {
>>
>> streamWriter = new System.IO.StreamWriter(strTempPath);
>>
>> streamWriter.Write(request);
>>
>> }
>>
>> catch(Exception eed3)
>>
>> {
>>
>> int i22322 = 23 + 23;
>>
>> }
>>
>> finally
>>
>> {
>>
>> try
>>
>> {
>>
>> if(streamWriter != null)
>>
>> {
>>
>> streamWriter.Close();
>>
>> }
>>
>> }
>>
>> catch(Exception ee3)
>>
>> {
>>
>> int i23243 = 23 + 23;
>>
>> }
>>
>> }
>>
>> int i23 = 23 + 23;
>>
>> }
>>
>> }
>>
>>
>> "William Stacey [MVP]" <staceyw@xxxxxxxx> wrote in message
>> news:eiqw0JHxFHA.1028@xxxxxxxxxxxxxxxxxxxxxxx
>>> Dispose calls Flush, so don't think there is a way to do that. However,
>>> there is probably a way to refactor your code to get the behavior you
>>> desire. What are you trying to do?
>>>
>>> --
>>> William Stacey [MVP]
>>>
>>> "Daniel" <softwareengineer98037@xxxxxxxxx> wrote in message
>>> news:%23e$Ij6GxFHA.612@xxxxxxxxxxxxxxxxxxxxxxx
>>> > is there any way to clear the buffer of a System.IO.StreamWriter so
>>> > that
>>> > it
>>> > does not do a flush when it is closed in the finaly block?
>>> >
>>> >
>>>
>>>
>>
>>
>
>
.
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