FilterEventHandler FilterEventHandler FilterEventHandler FilterEventHandler Delegate

Definition

Represents the method that will handle the Filter event.

public delegate void FilterEventHandler(System::Object ^ sender, FilterEventArgs ^ e);
public delegate void FilterEventHandler(object sender, FilterEventArgs e);
type FilterEventHandler = delegate of obj * FilterEventArgs -> unit
Public Delegate Sub FilterEventHandler(sender As Object, e As FilterEventArgs)

Parameters

sender
Object Object Object Object

The source of the event.

Inheritance
FilterEventHandlerFilterEventHandlerFilterEventHandlerFilterEventHandler

Examples

The following example shows how to set an event handler for the CollectionViewSource.Filter event. In this example, listingDataView is an instance of CollectionViewSource.

listingDataView.Filter += new FilterEventHandler(ShowOnlyBargainsFilter);
AddHandler listingDataView.Filter, AddressOf ShowOnlyBargainsFilter

The following example shows the implementation of the example ShowOnlyBargainsFilter filter event handler. This event handler uses the FilterEventArgs.Accepted property to filter out AuctionItem objects that have a CurrentPrice of $25.00 or greater.

private void ShowOnlyBargainsFilter(object sender, FilterEventArgs e)
{
    AuctionItem product = e.Item as AuctionItem;
    if (product != null)
    {
        // Filter out products with price 25 or above
        if (product.CurrentPrice < 25)
        {
            e.Accepted = true;
        }
        else
        {
            e.Accepted = false;
        }
    }
}
Private Sub ShowOnlyBargainsFilter(ByVal sender As Object, ByVal e As FilterEventArgs)
    Dim product As AuctionItem = CType(e.Item, AuctionItem)
    If Not (product Is Nothing) Then
        'Filter out products with price 25 or above
        If product.CurrentPrice < 25 Then
            e.Accepted = True
        Else
            e.Accepted = False
        End If
    End If
End Sub

For the complete example, see Data Binding Demo.

Extension Methods

GetMethodInfo(Delegate) GetMethodInfo(Delegate) GetMethodInfo(Delegate) GetMethodInfo(Delegate)

Gets an object that represents the method represented by the specified delegate.

Applies to

See also