RegexStringValidator attribute

[Berryl Hesh]

I want a ConfigurationPr operty property to be validated; it should always be
the name of some interface of some sort so it just needs to start with an
"I".

Pattern = @"^I"
TestInput = "IEmployeeRepos itory"

Iinstantiating a RegexStringVali dator as a variable works as expected:
[Test] public void InterfaceValida torTest() {
var validator = new RegexStringVali dator(@"^I");
<----------------succeds without a "*"
validator.Valid ate("IEmployeeR epository");
}

But as an attribute, it fails unless I add an asterisk ("*") after the
pattern:

[ConfigurationPr operty("reposit oryInterface", IsKey = true, IsRequired =
true)]
[RegexStringVali dator(@"^I*")] public string InterfaceName {
<------------------fails without a "*"
get { return (string) this["repositoryInte rface"]; }
set { this["repositoryInte rface"] = value; }
}

Why the discrepency?

[Berryl Hesh]

Re: RegexStringVali dator attribute

To clarify: I'm trying to understand what looks like a discrepency between a
RegexStringVali dator when used declaratively vs. usage in code. The details
are below.

Thanks. BH

"Berryl Hesh" <efinger9@yahoo .comwrote in message
news:j67Pk.2549 $U%6.417@newsfe 01.iad...

>I want a ConfigurationPr operty property to be validated; it should always
>be the name of some interface of some sort so it just needs to start with
>an "I".
>
Pattern = @"^I"
TestInput = "IEmployeeRepos itory"
>
Iinstantiating a RegexStringVali dator as a variable works as expected:
[Test] public void InterfaceValida torTest() {
var validator = new RegexStringVali dator(@"^I");
<----------------succeds without a "*"
validator.Valid ate("IEmployeeR epository");
}
>
But as an attribute, it fails unless I add an asterisk ("*") after the
pattern:
>
[ConfigurationPr operty("reposit oryInterface", IsKey = true, IsRequired =
true)]
[RegexStringVali dator(@"^I*")] public string InterfaceName {
<------------------fails without a "*"
get { return (string) this["repositoryInte rface"]; }
set { this["repositoryInte rface"] = value; }
}
>
Why the discrepency?
>

[Hans Kesting]

Re: RegexStringVali dator attribute

It happens that Berryl Hesh formulated :

I want a ConfigurationPr operty property to be validated; it should always be
the name of some interface of some sort so it just needs to start with an
"I".
>
Pattern = @"^I"
TestInput = "IEmployeeRepos itory"
>
Iinstantiating a RegexStringVali dator as a variable works as expected:
[Test] public void InterfaceValida torTest() {
var validator = new RegexStringVali dator(@"^I");
<----------------succeds without a "*"
validator.Valid ate("IEmployeeR epository");
}
>
But as an attribute, it fails unless I add an asterisk ("*") after the
pattern:
>
[ConfigurationPr operty("reposit oryInterface", IsKey = true, IsRequired =
true)]
[RegexStringVali dator(@"^I*")] public string InterfaceName {
<------------------fails without a "*"
get { return (string) this["repositoryInte rface"]; }
set { this["repositoryInte rface"] = value; }
}
>
Why the discrepency?

If you use the attribute [RegexStringVali dator] you really use the
RegexStringVali datorAttribute class. That might be a source of
differences.

I don't know this class, but I do know the RegularExpressi onValidator
from ASP.Net. This validator checks not only that the supplied string
matches the regex, but also checks that the matched length is equal to
the complete length of the string. So the regex works as if it always
starts with a "^" and ends with a "$".
So a "^I" would effectively match an "I" only. A "^I.*" (that is ".*"
instead of a plain "*", typo in your post?) would match anything
starting with an "I".

Hans Kesting