Chris Frazier is bumping heads with the Regular Expression Validator
So I'm trying to get a regular expression validator to work - ya know, validate my data. I'm a reeeeal novice when it comes to regex, so with a little help and tweaking, this is what I come up with:
ValidationExpression = "(\d{1,8}(\.\d{1,2})?)|(\d{0,8}(\.\d{1,2}))|(N\/A)"
Because I want a decimal number OR N/A, which is the default value that each of my textboxes (in this case) are populated with. This regular expression works. Almost. I could *not* figure out why I could add an empty string or a bunch of spaces and it validates as true. So I took a look at the WebUIValidation.js that the validators use.
function RegularExpressionValidatorEvaluateIsValid(val) {
var value =
ValidatorGetValue(val.controltovalidate);
if (ValidatorTrim(value).length == 0)
return true;
var rx = new
RegExp(val.validationexpression);
var matches = rx.exec(value);
return (matches != null
&& value == matches[0]);
}
The important bit is the if(ValidatorTrim) part. It's valid if there is nothing there! Maybe I'm just dense...wait...it's *probably* because I'm dense, but I want my regular expression validator to match my regular expression *only*. I know I could add a required field validator, but that is not correct. It's *not* a required field - that's why N/A is a valid value. But a space/no entry is not. I want the value in my field to be :
a decimal number OR "N/A" ONLY!
grrrrrrr...I don't know if I should modify the WebUIValidation.js or write my own control that will strictly match a Regular Expression. Sucks on empty strings.
7:50:48 PM 
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