Data Binding in Blazor TimePicker Component

4 Oct 20211 minute to read

This section briefly explains how to bind the value to the TimePicker component in the below different ways.

• One-Way Data Binding
• Two-Way Data Binding
• Dynamic Value Binding

One-Way Binding

We can bind the value to the TimePicker component directly for Value property as mentioned in the following code example. In one-way binding, we need to pass property or variable name along with @ (For Ex: “@DateValue”).

@using Syncfusion.Blazor.Calendars

<SfTimePicker TValue="DateTime?" Value="@DateValue"></SfTimePicker>

<button @onclick="@UpdateValue">Update Value</button>

@code {
    public DateTime DateValue { get; set; } = new DateTime(DateTime.Now.Year, DateTime.Now.Month, 28, 12, 30, 00);

    public void UpdateValue()
    {
        DateValue = DateTime.Now;
    }
}

Two-Way Data Binding

Two-way binding can be achieved by using bind-Value attribute and its support string, int, Enum, DateTime, bool types. If component value has been changed, it will affect all the places where we bind the variable for the bind-value attribute.

@using Syncfusion.Blazor.Calendars

<p>TimePicker value is: @DateValue</p>

<SfTimePicker TValue="DateTime?" @bind-Value="@DateValue"></SfTimePicker>

    @code {
        public DateTime? DateValue { get; set; } = DateTime.Now;
    }

Dynamic Value Binding

The property value can be changed dynamically by manually calling the StateHasChanged() method inside public event of Blazor TimePicker component only. This method notifies the component that its state has changed and queues a re-render.

There is no need to call this method for native events since it’s called after any lifecycle method has been called and can also be invoked manually to trigger a re-render.

@using Syncfusion.Blazor.Calendars

<p>TimePicker value is: @TimeValue</p>

<SfTimePicker TValue="DateTime?" Value="@TimeValue">
    <TimePickerEvents TValue="DateTime?" ValueChange="@onChange"></TimePickerEvents>
</SfTimePicker>

@code {

    public DateTime? TimeValue { get; set; } = DateTime.Now;

    private void onChange(Syncfusion.Blazor.Calendars.ChangeEventArgs<DateTime?> args)
    {
        TimeValue = args.Value;
        StateHasChanged();
    }
}