TelerikComboBox firing OnChange twice

[Martin Herløv]

Hi when I select an item I get a change event as expected, but I also got one on lostfocus, when I tab away.

 

  <td class="pe-3"><TelerikComboBox
            Data="@ComboItems"
            TextField="Name"
             ValueField="Id"
             @bind-Value="SelectedValue"
             OnChange="ValueChangedHandler"/></td>

private void ValueChangedHandler(object value)
        {
            int id = (int) value;
            Console.WriteLine("" + id);
        }

ValueChangedHandler called twice

[Matthias]

I'm pretty sure that the binding only occurs when you leave the ComoBox. Without binding, "ValueChanged" would be called only once. Try this without binding and use only "Value". This will be the case for all input fields.

[Marin Bratanov]

Hi Martin,

Take a look at this article which describes this behavior and two ways to avoid it: https://docs.telerik.com/blazor-ui/knowledge-base/common-onchange-fires-twice

Regards,
Marin Bratanov
Progress Telerik