VDT.Core.Blazor.Wizard

Blazor component that helps you create wizard components with sequential steps, forward/back navigation, conditional completion of steps, step- and wizard-level events, and more

Features

• Fully customizable layout
• Events for starting, stopping and completing the wizard
• Steps completed only on your own conditions
• Events for initializing and attempted competion of steps
• Optional back navigation and cancelling

Example

<div> <button @onclick="async () => await Wizard.Start()" class="btn btn-primary">Start wizard</button> <button @onclick="() => Wizard.Stop()" class="btn btn-secondary">Stop wizard</button> </div> <Wizard @ref="Wizard" OnStart="Start" OnStop="Stop" OnFinish="Finish" ContainerClass="wizard" TitleContainerClass="wizard-title" StepTitleContainerClass="wizard-steps" StepTitleClass="wizard-step" ActiveStepTitleClass="active" AllowCancel="true" AllowPrevious="true" ButtonContainerClass="wizard-buttons" ButtonClass="wizard-button" ButtonCancelClass="wizard-button-secondary" ButtonCancelText="Stop" ButtonPreviousClass="wizard-button-secondary" ButtonPreviousText="<< Prev" ButtonFinishClass="wizard-button-primary" ButtonFinishText="Complete" ButtonNextClass="wizard-button-primary" ButtonNextText="Next >>" ContentContainerClass="wizard-body"> <TitleContent> <h3>Wizard title</h3> </TitleContent> <Steps> <WizardStep OnInitialize="args => InitializeStep(args, 1)" OnTryComplete="args => TryCompleteStep(args, 1)" Title="The first step"> Test step 1 </WizardStep> <WizardStep OnInitialize="args => InitializeStep(args, 2)" OnTryComplete="args => TryCompleteStep(args, 2)" Title="Another"> <div class="form-check"> <input id="goNext" type="checkbox" @bind="GoNext" class="form-check-input" /> <label for="goNext" class="form-check-label">Go next?</label> </div> <div> Test step 2 </div> </WizardStep> <WizardStep OnInitialize="args => InitializeStep(args, 3)" OnTryComplete="args => TryCompleteStep(args, 3)" Title="Summary"> Test step 3 </WizardStep> </Steps> </Wizard> <pre> @StepData </pre> @code { public Wizard Wizard { get; set; } public bool GoNext { get; set; } = true; public string StepData = string.Empty; public void Start(WizardStartedEventArgs args) { StepData += $"{nameof(Start)} wizard{Environment.NewLine}"; } public void Stop(WizardStoppedEventArgs args) { StepData += $"{nameof(Stop)} wizard{Environment.NewLine}"; } public void Finish(WizardFinishedEventArgs args) { StepData += $"{nameof(Finish)} wizard{Environment.NewLine}"; } public void InitializeStep(WizardStepInitializedEventArgs args, int step) { StepData += $"{nameof(InitializeStep)} step {step}{Environment.NewLine}"; GoNext = true; } public void TryCompleteStep(WizardStepAttemptedCompleteEventArgs args, int step) { StepData += $"{nameof(TryCompleteStep)} step {step}{Environment.NewLine}"; args.IsCancelled = !GoNext; } }

CSS class properties

• ContainerClass gets applied to a div surrounding the entire wizard when using the default layout
• TitleContainerClass gets applied to a div surrounding the title content when using the default layout
• StepTitleContainerClass gets applied to a div surrounding the step titles when using the default layout
• StepTitleClass gets applied to the step title divs
• ActiveStepTitleClass gets applied to the active step title div
• ButtonContainerClass gets applied to a div surrounding the navigation buttons when using the default layout
• ButtonClass gets applied to all navigation buttons
• ButtonCancelClass gets applied to the cancel button
• ButtonPreviousClass gets applied to the previous button
• ButtonNextClass gets applied to the next button
• ButtonFinishClass gets applied to the finish button
• ContentContainerClass gets applied to a div surrounding the content of the currently active step when using the default layout

Events

You can subscribe to several events during the wizard's life cycle; most are informational only but some allow you to manipulate the wizard's behaviour.

• The Wizard.OnStart event fires when the wizard is started.
• The Wizard.OnStop event fires when the wizard is stopped.
• The Wizard.OnFinish event fires when the wizard is finished because all steps of the wizard have been completed.
• The WizardStep.OnInitialize event fires when a step is rendered.
• The WizardStep.OnTryComplete event fires when a step is completed by clicking the Next button. The provided WizardStepAttemptedCompleteEventArgs lets you see if the step has been previously completed and lets you cancel completion of a step.

Custom layout

If the default wizard layout does not suffice, it's easy to customize the layout by using the Layout renderfragment and the various renderfragments found on the context provided by it. If you provide a layout template the default container elements will not be used and their CSS classes will not be applied, but any properties for specific renderfragments for buttons or other common elements, such as CSS, titles and the various allow options will still be applied.

Renderfragments

• context.DefaultLayout renders the wizard title content
• context.Title renders the wizard title content
• context.StepTitles renders the wizard step titles
• context.Buttons renders the wizard cancel, previous, next and finish buttons if they are available and enabled
• context.ButtonCancel renders the wizard cancel button if enabled
• context.ButtonPrevious renders the wizard previous button if enabled and there is a previous step
• context.ButtonNext renders the wizard next button if there is a next step
• context.ButtonFinish renders the wizard finish button if this is the final step
• context.ActiveStepContent renders the wizard active step content

For further customization, you can create a layout without using any renderfragments, instead using only properties and methods of the wizard that can be accessed via context.Wizard.

Wizard properties

This does not list Blazor parameters such as button texts or any of the CSS classes.

• IsActive indicates whether or not the wizard is currently active
• ActiveStepIndex is the index of the currently active step if the wizard is active, otherwise null
• ActiveStep is the currently active step if the wizard is active, otherwise null
• IsFirstStepActive indicates if the first step in the wizard is the currently active one
• IsLastStepActive indicates if the last step in the wizard is the currently active one
• AllSteps returns all available wizard steps in order of display

Wizard methods

• Start() opens the wizard at the first step if it's not currently active
• Stop() closes and reset the wizard if it's currently active
• GoToPreviousStep() goes to the previous step in this wizard if it is active and it's not on the first step
• TryCompleteStep() attempts to complete the current step, then either move to the next step or complete the wizard
• GoToStep(...) navigates to a specific step in the wizard if it is active, after optionally attempting to complete the currently active step
  • Navigating to the step after the last available step completes and resets the wizard
  • Available overloads:
    • GoToStep(WizardStep step, bool tryCompleteStep)
    • GoToStep(int stepIndex, bool tryCompleteStep)
    • GoToStep(StepIndexProvider stepIndexProvider, bool tryCompleteStep)

Wizard step properties

This does not list Blazor parameters such as Title.

• IsActive indicates whether or not the wizard step is currently active
• IsCompleted indicates whether or not this step has been previously completed; resets to false when the wizard is closed

Example

This example wizard does not use any of the renderfragments, instead showing how to create a completely new layout with the same functionality and added navigation and indication for completed steps.

<Wizard @ref="Wizard"> <TitleContent> <h2>Wizard title</h2> </TitleContent> <Layout> <div class="card"> <div class="card-header"> @context.Title </div> <div> <div class="d-flex align-items-stretch"> <div class="flex-grow-0 border-end bg-light px-3 py-2"> @foreach (var step in context.Wizard.AllSteps) { <div class="me-3"> @if (step.IsActive) { <span class="fw-bold">@step.Title</span> } else if (step.IsCompleted) { <button class="btn btn-link p-0 align-baseline" @onclick="() => context.Wizard.GoToStep(step, false)">@step.Title</button> } else { <span>@step.Title</span> } @if (step.IsCompleted) { <span class="text-success fw-bold ps-1">&check;</span> } </div> } </div> <div class="flex-grow-1 px-3 py-2"> @context.ActiveStepContent </div> </div> </div> <div class="card-footer d-flex"> <div class="flex-grow-1"> <button class="btn btn-secondary" @onclick="context.Wizard.Stop">Stop</button> </div> <div class="flex-grow-0 btn-group"> @if (!context.Wizard.IsFirstStepActive) { <button class="btn btn-secondary" @onclick="context.Wizard.GoToPreviousStep">&lt;&lt; Prev</button> } @if (context.Wizard.IsLastStepActive){ <button class="btn btn-primary" @onclick="context.Wizard.TryCompleteStep">Complete</button> } else { <button class="btn btn-primary" @onclick="context.Wizard.TryCompleteStep">Next &gt;&gt;</button> } </div> </div> </div> </Layout> <Steps> <WizardStep Title="Introduction"> <p> This is an example wizard with a custom layout. Please click Next to continue. </p> </WizardStep> <WizardStep Title="Your step here"> <p> This is the second step in this wizard. Please click Next to continue. </p> </WizardStep> <WizardStep Title="Summary"> <p> Please click Complete to finish the wizard. </p> </WizardStep> </Steps> </Wizard> @code { private Wizard? Wizard { get; set; } }