Enhanced customer-side validations within ASP.net controls

Trying to integrate some extra javascript into an outdated ASP.net form for validation purposes. The form currently utilizes ASP.net validators such as asp:RangeValidator and asp:RequiredFieldValidator.

The following is the javascript code generated for the 'Save' button.

<input type="submit" name="ctl00$cphContent$btnSave" value="Save"
 onclick="javascript:if(!validateFirstDate('ctl00_cphContent_txtDate', 
 'ctl00_cphContent_txtDateRepayment', 'ctl00_cphContent_lblRepaymentMode'))
  return false;
WebForm_DoPostBackWithOptions(new 
 WebForm_PostBackOptions(&quot;ctl00$cphContent$btnSave&quot;, &quot;&quot;,
true, &quot;&quot;, &quot;&quot;, false, false))" id="ctl00_cphContent_btnSave" class="ButtonStyle">

My new function 'validateFirstDate' has been added using 

btnSave.Attributes.Add("onclick", "javascript:if(!validateFirstRepaymentDate...
while WebForm_PostBackOptions... is automatically generated by ASP.net for validations.

Issue at hand: Looking to execute my additional script after the ASP.net script only if the default validations fail (current setup executes the first function regardless). Struggling to find a solution.

Any assistance would be greatly appreciated.

(Primarily experienced in Java, but tasked with fixing this older project in ASP.net)

javascriptasp.netvalidation

Answer №1

If you want to trigger your own function after the ASP validation function, one approach is to override the ValidatorHookupControl. You can find more information about this process here.

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