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format string question


I have a param class containg these vars:-
string key; // eg: "WN"
object value; // eg: 1.2
string format; // eg "F2"

and I output these to a StreamWriter using

nc_file.Write(" {0}{1:" + param.format + "}", param.key, param.value);

to give output like (using above egs) "WN1.20"

This works great for numeric types. Problem is that there are a couple
of string values which require padding - eg: "FN<some filename...."
which requires a fixed field size of say 20.

Is there a way to use a format string to achieve this - if there is I
haven't figured it. 99% of all parameters are string key/ numeric value
and I'm hoping I don't need to use special cases in the enumerator to
catch the few string values that need padding. Hopefully this makes sense.

Thanks for the help. matthew.

Nov 17 '05 #1
2 1578
> This works great for numeric types. Problem is that there are a couple
of string values which require padding - eg: "FN<some filename...."
which requires a fixed field size of say 20.

The following code displays a string with a field size of 10. The first
example is right-padded, the second left padded.

Console.WriteLi ne( "...{0,10}. ..", "a" );
Console.WriteLi ne( "...{0,-10}...", "a" );

Is that what you mean?

Nov 17 '05 #2
Wessel Troost wrote:
This works great for numeric types. Problem is that there are a
couple of string values which require padding - eg: "FN<some
filename...." which requires a fixed field size of say 20.

The following code displays a string with a field size of 10. The
first example is right-padded, the second left padded.

Console.WriteLi ne( "...{0,10}. ..", "a" );
Console.WriteLi ne( "...{0,-10}...", "a" );

Is that what you mean?


Hi Wessel,

I've been trying Console.WriteLi ne("...{0:-20}, etc) so that's my
mistake. Thanks alot, matthew.
Nov 17 '05 #3

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