Blazor - Get Started with Check Input

Blazor - Get Started with Smart.CheckInput

Setup The Project

Follow the Getting Started guide to set up your Blazor Application with Smart UI.

Setup Basic Check Input

Smart.CheckInput is an input that allows selecting from a predefined checkbox style options drop down list.

The list of avaible options is set using the DataSource property.

  1. Add the CheckInput component to the Pages/Index.razor file
  2. Inside the @code block, create an array of elements and set it as DataSource of the component
    <CheckInput DataSource="drinks"></CheckInput>
        private string[] drinks = new string[]{"Water", "Juice", "Soda", "Tea", "Beer", "Wine", };
Basic check input


When the Readonly property is set to true, the input field will be disabled and changes will be allowed only by using the dropdown list.

<CheckInput DataSource="drinks" Readonly="true"></CheckInput>
Readonly check input

CheckInput Methods

Smart.CheckInput can be easily controlled programmatically using some of the built-in Methods.

Create buttons that can control the Open/Close state of the dropdown list:

<Button OnClick="Open">Open</Button> <Button OnClick="Close">Close</Button>
<CheckInput @ref="checkInput" DataSource="drinks"></CheckInput>

  CheckInput checkInput;
  private string[] drinks = new string[]{"Water", "Juice", "Soda", "Tea", "Beer", "Wine", };

  private void Open(){
  private void Close(){
CheckInput methods

CheckInput Customization

Smart.CheckInput can be styled in different ways by setting the Class property. The CheckInput can be default, outlined or underlined

<CheckInput DataSource="drinks" Class="underlined"></CheckInput>
Input styling

CheckInput Events

Smart.CheckInput provides an OnChange Event that can help you expand the component's functionality.
The event object has unique event.detail parameters.

  • OnChange - triggered when the selection is changed.
    Event Details: string label, dynamic oldLabel, dynamic oldValue, dynamic value

The demo below uses the OnChange Event to display the selected options:

<h2>Selected value: @values</h2>
<CheckInput DataSource="drinks" OnChange="OnChange"></CheckInput>

    private string[] drinks = new string[]{"Water", "Juice", "Soda", "Tea", "Beer", "Wine", };
    string values;

    private void OnChange(Event ev){
            CheckInputChangeEventDetail detail = ev["Detail"];
            values = detail.Value;
OnChange CheckInput event

Two-way Value Binding

The CheckInput component also supports two-way value binding:

<CheckInput DataSource="drinks" @bind-Value = "@textValue"></CheckInput>

    private string[] drinks = new string[]{"Water", "Juice", "Soda", "Tea", "Beer", "Wine" };
    string textValue = "";
Input value binding