how to allow numeric value with sign in C#

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i wnat to allow only +5.00 or -6.0 which is numeric value with sign is there any function in C# for such validation.where sign is only at start of the number.

Posted 18-Mar-13 6:09am

vishal_h

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Abhinav S · Answer 1 · 2013-03-18T06:48:00

Solution 3

If you are storing values in a string then use string.Contains to figure out if there are more than one - sign in the string.

Posted 18-Mar-13 6:48am

Abhinav S

Comments

Sergey Alexandrovich Kryukov 18-Mar-13 13:57pm

We don't really know exactly OP's situations, but sometimes it may be needed (with "if"), a 5.
—SA

Abhinav S 18-Mar-13 22:57pm

Thank you SA.

vishal_h 20-Mar-13 0:34am

thanks for reply..but in my requirement i want to allow sign only at start of the numeric value.

Sergey Alexandrovich Kryukov · Answer 2 · 2013-03-18T06:21:00

The problem is not correctly formulated. Most likely, you simply need certain string formatting representing a numeric value. It depends on the data type, but let's assume it's System.Int32, alias is int. In this case, take a look:
http://msdn.microsoft.com/en-us/library/system.int32.tostring.aspx[^],
http://msdn.microsoft.com/en-us/library/dwhawy9k.aspx[^],
http://msdn.microsoft.com/en-us/library/0c899ak8.aspx[^].

This is all you need. For other type, the situation is nearly the same.

—SA