Validate values for decimal and integers

I need to validate that a TextBox contains only numbers, with allowances for commas and/or decimal points.

Here are a few examples of valid entries:

• 12.7
• 19.245,7
• 11,123.326.7
• 16,7
• 0.19
• 0,5

And here are some examples of invalid entries:

• 12.00 --> 12
• 19.000,7 --> 19000,7
• .125 --> 0.125
• 000.000 --> 0

I'm using thi开发者_StackOverflow中文版s regex, both it doesn't work: @"^[0-9]([\.\,][0-9]{1,3})?$"

How can I do this?

If you are using asp.net. You can use the comparevalidator and set the Operator to DataTypeCheck and set Type to Double (or currency)