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Jul 3, 2025
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chore(Filter): document OnUpdate event #3080

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chore(Filter): document OnUpdate event
Tsvetomir-Hr Jul 2, 2025
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chore: apply review recommendations
Tsvetomir-Hr Jul 2, 2025
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Update components/filter/events.md
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Update components/filter/events.md
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40 changes: 40 additions & 0 deletions components/filter/events.md
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Expand Up @@ -12,12 +12,52 @@ position: 11

This article explains the available events for the Telerik Filter for Blazor:

* [OnUpdate](#onupdate)
* [ValueChanged](#valuechanged)

## OnUpdate

The `OnUpdate` event fires when the filter value changes. The component works directly with the bound `CompositeFilterDescriptor` value and automatically updates it when it is used with one-way binding.

>caption Handle OnUpdate.

````RAZOR
@using Telerik.DataSource

<TelerikFilter Value="@Value" OnUpdate="@OnFilterUpdate">
<FilterFields>
<FilterField Name="@(nameof(Person.EmployeeId))" Type="@(typeof(int))" Label="Id"></FilterField>
<FilterField Name="@(nameof(Person.Name))" Type="@(typeof(string))" Label="First Name"></FilterField>
<FilterField Name="@(nameof(Person.AgeInYears))" Type="@(typeof(int))" Label="Age"></FilterField>
</FilterFields>
</TelerikFilter>
<br />
<strong>OnUpdate triggered count: </strong> @TriggeredOnUpdateCount

@code {
private CompositeFilterDescriptor Value { get; set; } = new CompositeFilterDescriptor();
private int TriggeredOnUpdateCount { get; set; }

private void OnFilterUpdate()
{
TriggeredOnUpdateCount++;
}

public class Person
{
public int EmployeeId { get; set; }
public string Name { get; set; }
public int AgeInYears { get; set; }
}
}
````

## ValueChanged

The `ValueChanged` event fires when the value has changed. Its event handler receives the updated `CompositeFilterDescriptor` as an argument.

> The `ValueChanged` event will be deprecated in future versions. Use the `OnUpdate` event instead.

>caption Handle ValueChanged.

````RAZOR
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