Hi Jonathan Simmons,
Please note the following quote from our documentation:
"The RadInputManager offers an easy and intuitive way to extend a standard asp.net text box, and without any extra custom code, introduce much functionality, normally related to a Telerik RadInput control"
Based on the above, I am afraid that
RadInputManager can not be used to validate other
RadInput controls. As a workaround you can use a
RegularExpressionValidator as demonstrated in this online example:
Validation
I hope this helps,
Martin
the Telerik team
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