Native Events in Blazor DatePicker Component

25 Feb 20222 minutes to read

This section explains the steps to include native events and pass data to event handler in the DatePicker component.

Bind native events to DatePicker

You can access any native event by using on <event> attribute with a component. The attribute’s value is treated as an event handler.

In the following example, the KeyPressed method is called every time the key is pressed on input.

@using Syncfusion.Blazor.Calendars

<SfDatePicker TValue="DateTime?" @onkeypress='@KeyPressed'></SfDatePicker>

@code {
    public void KeyPressed(){
      Console.WriteLine("Key Pressed!");
  }
}

Also, you can rewrite the previous code example as follows using the Lambda expressions.

@using Syncfusion.Blazor.Calendars

<SfDatePicker TValue="DateTime?" @onkeypress="@(() => Console.WriteLine("Key Pressed!"))"></SfDatePicker>

Pass event data to event handler

Blazor provides a set of argument types to map to native events. The list of event types and event arguments are:

• Focus Events - FocusEventArgs
• Mouse Events - MouseEventArgs
• Keyboard Events - KeyboardEventArgs
• Input Events - ChangeEventArgs/EventArgs
• Touch Events – TouchEventArgs
• Pointer Events – PointerEventArgs

In the following example, the KeyPressed method is called every time any key is pressed inside the input. But, the message will be printed when you press the “5” key.

@using Syncfusion.Blazor.Calendars

<SfDatePicker TValue="DateTime?" @onkeypress='@(e => KeyPressed(e))'></SfDatePicker>

@code {
    public void KeyPressed(KeyboardEventArgs args)
    {
        if (args.Key == "5")
        {
            Console.WriteLine("5 was pressed");
        }
    }
}

Using Lambda expression, you can pass the event data to the event handler.

List of native events supported

List of Native events
onclick	onblur	onfocus	onfocusout
onmousemove	onmouseover	onmouseout	onmousedown	onmouseup
ondblclick	onkeydown	onkeyup	onkeypress
ontouchend	onfocusin	onmouseup	ontouchstart