File.AppendText causing severe hair loss

[snaphook]

Below is a section of code that writes to a file just fine so long as the else statement is remarked out. If it is left in, all I get is a 0 byte file. What am I doing wrong?

Thanks a mil


try
{
if(dExp.WCCIPattern[0] != 0)
{
sw = File.AppendText(@FilePath);
// If file at 'path' doesn't exist it will create the file. If it does exist it will append the file.
if(dExp.WCCIDirection[0] == 1)
nextOpen = Close[0] + TickSize;
else
nextOpen = Close[0] - TickSize;

sw.Write("\r\n"+Time[0].ToString("M-dd-yyy")+","+Time[0].ToString("HH:mm")+","+Pattern+","+dExp.WCCIDirect ion+","+","+nextOpen);
sw.Flush();
sw.Close();
}
else
if(dExp.WCCIPattern[1] != 0)
{
sw = File.AppendText(@FilePath);
if(dExp.WCCIDirection[1] == 1)
{
sw.Write(","+(Open[0] - Low[0])/TickSize+","+(High[0]-Open[0])/TickSize);
sw.Flush();
sw.Close();
}
else
{
sw.Write(","+(High[0] - Open[0])/TickSize+","+(Open[0]-Low[0])/TickSize);
sw.Flush();
sw.Close();
}
}
}
catch (Exception e)
{
// Outputs the error to the log
Log("You cannot write and read from the same file at the same time. Please remove SampleStreamReader.", NinjaTrader.Cbi.LogLevel.Error);
throw;
}

[NinjaTrader_Ray]

Shouldn't that be "else if (XXX)" since it looks like you have

if ()
{}
else
{}
else
{}

[snaphook]

Found the problem. It was that blasted [1] look back. Grrrrrrrrrrrrrrrrrrrr.

[cclsys]

Could someone please show me how to write it out so that FIRST it wipes out any data in the file, and then appends all the new data into it? Been on the C+ zone but just can't find this out.

[NinjaTrader_Bertrand]

Unfortunately I have no sample for this case available cclsys, couldn't you use FileAppendAllText, to create new file each and then point to it?

http://msdn.microsoft.com/en-us/library/system.io.file_members.aspx

[snaphook]

I'm far from an expert and am kinda guessing here, but using the File.AppendText(@FilePath) to add data, it would seem that File.Delete(@<filename>) (or something like it) would delete the file.

See http://www.csharpfriends.com/Article...x?articleID=54