Fixed Width Text Report

I'm trying to create a fixed width text report. I've created a function that
takes a string and a length and returns the string either truncated or padded
with spaces to the given length.
I then use url parameters to modify the CSV device information settings to
change the encoding to ascii, change the extension to txt and change the
FieldDelimiter to %1f (unicode symbol for some kind of field grouping or
something).
Things seems to properly but I don't like having to set the FieldDelimiter
to anything. I tried setting it to null by saying isnull=true but that
generates an error about referencing a null object. I read something that
said to make it an empty string but I can seem to be able to do that using
url parameters. I could try it programmatically but I would prefer using the
url.
Does anyone have any ideas?(The parent post is mine, I just changed my login)
I decided that setting the FieldDelimiter to %1f was not a good idea. I
did try to set the parameter to an empty string programmatically but it
just went to the default comma delimiter.
I've decided to just plug in the url encoded value of which stands
for a null ascii character. I don't know if this is the best solution
but I am going with it. Here is my final url:
http://localhost/ReportServer?/Devel/TestFile&rs:Format=CSV&rs:Command=Render&rc:Extension=txt&rc:NoHeader=true&rc:FieldDelimiter=&rc:Encoding=ascii
If anyone else comes up with any other ideas of how to use RS to create
fixed width text files I would be glad to hear them. I can't find
anything that explains a way of doing this. This would work perfect if
I could set the FieldDemlimiter parameter to nothing but it keeps going
to the default comma.
Thanks.
Gary