No JavaScript, no second form needed, and the validation can stay: For exactly this use case the HTML5 spec has designed the formnovalidate attribute for submit elements (like <input type=submit>), as one of the attributes for form submission: The formnovalidate attribute can be used to make submit buttons that do not trigger the constraint validation. … Read more
<asp:RequiredFieldValidator InitialValue=”-1″ ID=”Req_ID” Display=”Dynamic” ValidationGroup=”g1″ runat=”server” ControlToValidate=”ControlID” Text=”*” ErrorMessage=”ErrorMessage”></asp:RequiredFieldValidator>
You can do this with JavaScript like this: ValidatorEnable(RequiredFieldValidatorId, false); Then have your drop down list use the onchange event (I’d suggest using jQuery) $(“#<%=dropDownList.ClientID %>”).change(function(){ var val = $(this).val(); var skip = null; if (val == 1) skip = “workPhoneValidator”; else if (val == 2) skip = “cellPhoneValidator”; …. // by popular demand… var … Read more
For the most part you treat it as if you are validating any other kind of control but use the InitialValue property of the required field validator. <asp:RequiredFieldValidator ID=”rfv1″ runat=”server” ControlToValidate=”your-dropdownlist” InitialValue=”Please select” ErrorMessage=”Please select something” /> Basically what it’s saying is that validation will succeed if any other value than the 1 set in … Read more
RequiredIf validation attribute I’ve written a RequiredIfAttribute that requires a particular property value when a different property has a certain value (what you require) or when a different property has anything but a specific value. This is the code that may help: /// <summary> /// Provides conditional validation based on related property value. /// </summary> … Read more