Native Events in Blazor Datetime Picker Component

9 Mar 20222 minutes to read

The following section explains steps to include native events and pass data to event handler in DateTimePicker component.

Bind native events to DateTimePicker

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

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

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

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

@using Syncfusion.Blazor.Calendars

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

Pass event data to event handler

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

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 input. But the message will be printed when you press “5” key.

@using Syncfusion.Blazor.Calendars

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

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

Using Lambda expression also, 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