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Validation functionality allows implementing an intuitive step by step form that will give users chance to move through the Wizard sequentially and have some required fields on each step.

The following properties are essential in implementing a validation for a RadWizardStep:

  • CausesValidation enables/disables the validation for specific RadWizardStep.

  • ValidationGroup specifies which group of controls is validated on navigation.

There are some specifics about the RadWizard validation functionality:

  • You can use same ValidationGroup value for more than one RadWizardStep. In this case you will be able to navigate between those steps without firing the validation. The validation will fail only if you go to a step that is not part of that ValidationGroup and leave some required fields empty.

  • The validation will not be fired if user clicks on the Previous navigation button or directly navigates to any of the previous steps in the Navigation Bar.

    • If a handler is attached to the PreviousButtonClick event, the Previous button will perform a postback and this will cause the validation to fire.
  • The Next button always fires the validation, even if a handler is not attached to the NextButtonClick event.

Please find below a little demonstration on how to make a text field within a step to be required in order to activate another step.

<telerik:RadWizard RenderMode="Lightweight" ID="RadWizard1" runat="server">
        <telerik:RadWizardStep Title="First Step" ID="RadWizardStep1" runat="server" StepType="Step"
            <asp:TextBox ID="TextBox1" runat="server" ValidationGroup="firstValidationGroup"></asp:TextBox>
            <asp:RequiredFieldValidator runat="server" ID="RequiredFieldValidator1" ValidationGroup="firstValidationGroup" 
                                        ControlToValidate="TextBox1" EnableClientScript="true" ErrorMessage="step 1 not filled up">
        <telerik:RadWizardStep Title="Second Step" ID="RadWizardStep2" runat="server" StepType="Step"
            <asp:TextBox ID="TextBox2" runat="server" ValidationGroup="secondValidationGroup"></asp:TextBox>
            <asp:RequiredFieldValidator runat="server" ID="validator2" ValidationGroup="secondValidationGroup" 
                                        ControlToValidate="TextBox2" EnableClientScript="true" ErrorMessage="step 2 not filled up">
        <telerik:RadWizardStep Title="Third Step" ID="RadWizardStep3" runat="server" StepType="Step"
            <asp:TextBox ID="TextBox3" runat="server" ValidationGroup="thirdValidationGroup"></asp:TextBox>
            <asp:RequiredFieldValidator runat="server" ID="validator3" ValidationGroup="thirdValidationGroup"
                                        ControlToValidate="TextBox3" EnableClientScript="true" ErrorMessage="step 3 not filled up">

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