Hi,

When I try to use client side validation on RadMaskedTextbox as follows, the validation still takes place after a postback. is this a bug?

I try to follow your demo https://demos.telerik.com/aspnet-ajax/textbox/functionality/validation/defaultvb.aspx

    <asp:TextBox ID="batch" runat="server" Width="60%"></asp:TextBox>
     <asp:RequiredFieldValidator ErrorMessage="Mandatory" ValidationGroup="Contact" Enabled="True" id="batchReq" ControlToValidate="batch" CssClass="text-danger small" display="dynamic" runat=server />
    <br />



      <telerik:RadMaskedTextBox RenderMode="Lightweight" EnableEmbeddedSkins="false" Skin="MetroTouchNeutral" ValidationGroup="Contact" ID="rmt_tijd" visible="true" runat="server" Mask="<0..24>:<0..59>" Width="30%"></telerik:RadMaskedTextBox>




                            <asp:RequiredFieldValidator EnableClientScript="true" ErrorMessage="Mandatory" ValidationGroup="Contact" Enabled="true" InitialValue="00:00"  id="RequiredFieldValidator3" ControlToValidate="rmt_tijd" CssClass="text-danger small" display="dynamic" runat=server />

    <br />
    <asp:Button ID="Button1" runat="server" Text="Button" ValidationGroup="Contact"  />

Thanks for your help, stay safe

Marc

Hello Marc,

If the client-side validation is failing and a postback is triggered while your project is set to .NET 4.5+, then most probably you would need to disable the default unobtrusive validation by placing the following entry in the appSettings of your web.config:

• http://stackoverflow.com/questions/16660900/webforms-unobtrusivevalidationmode-requires-a-scriptresourcemapping-for-jquery

• <configuration>
    <appSettings>
  	<add key="ValidationSettings:UnobtrusiveValidationMode" value="None" />

Regards,
Peter Milchev
Progress Telerik

TargetFramework = 4.6.1 and ValidationSettings:UnobtrusiveValidationMode is already set.

Still no client-side validation...

Marc

Hello Marc,

I have inspected the validation logic of the RequiredFieldValidator and the value of the input is actually trimmed to "0:0" which is why the client-side validation was not triggered. If you set the InitialValue to 0:0, then the client-side validation will work.

That is because the ValidatorGetValue function of the MS AJAX framework is overwritten in order to take into consideration the RadMaskedTextBox:

• if (typeof (window.ValidatorGetValue) == "function" && typeof (window.ValidatorGetValue_Original) == "undefined") {
      window.ValidatorGetValue_Original = window.ValidatorGetValue;
      window.ValidatorGetValue = function (b) {
          var a = document.getElementById(b);
          if (typeof (a.RadInputValidationValue) == "string") {
              if (a.RadInputLastSetTextBoxValue == a.value) {
                  return a.RadInputValidationValue;
              } else {
                  return a.value;
              }
          } else {
              return window.ValidatorGetValue_Original(b);
          }
      };
  }

Let me know how that works for you.

Regards,
Peter Milchev
Progress Telerik