IsNotEqualConverter

The IsNotEqualConverter is a one way converter that returns a bool indicating whether the binding value is not equal to another specified value.

The Convert method returns true when the binding value is not equal to the supplied ConverterParameter.

The ConvertBack method is not supported. For the opposite behavior see the IsEqualConverter.

BaseConverter Properties

The following properties are implemented in the base class, public abstract class BaseConverter:

Property	Description
DefaultConvertReturnValue	Default value to return when IValueConverter.Convert(object?, Type, object?, CultureInfo?) throws an Exception. This value is used when CommunityToolkit.Maui.Options.ShouldSuppressExceptionsInConverters is set to true.
DefaultConvertBackReturnValue	Default value to return when IValueConverter.ConvertBack(object?, Type, object?, CultureInfo?) throws an Exception. This value is used when CommunityToolkit.Maui.Options.ShouldSuppressExceptionsInConverters is set to true.

ICommunityToolkitValueConverter Properties

The following properties are implemented in the public interface ICommunityToolkitValueConverter:

Property	Type	Description
DefaultConvertReturnValue	object?	Default value to return when IValueConverter.Convert(object?, Type, object?, CultureInfo?) throws an Exception. This value is used when CommunityToolkit.Maui.Options.ShouldSuppressExceptionsInConverters is set to true.
DefaultConvertBackReturnValue	object?	Default value to return when IValueConverter.ConvertBack(object?, Type, object?, CultureInfo?) throws an Exception. This value is used when CommunityToolkit.Maui.Options.ShouldSuppressExceptionsInConverters is set to true.

Syntax

XAML

Including the XAML namespace

In order to use the toolkit in XAML the following xmlns needs to be added into your page or view:

xmlns:toolkit="http://schemas.microsoft.com/dotnet/2022/maui/toolkit"

Therefore the following:

<ContentPage
    x:Class="CommunityToolkit.Maui.Sample.Pages.MyPage"
    xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml">

</ContentPage>

Would be modified to include the xmlns as follows:

<ContentPage
    x:Class="CommunityToolkit.Maui.Sample.Pages.MyPage"
    xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
    xmlns:toolkit="http://schemas.microsoft.com/dotnet/2022/maui/toolkit">

</ContentPage>

Using the IsNotEqualConverter

The IsNotEqualConverter can be used as follows in XAML:

<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:toolkit="http://schemas.microsoft.com/dotnet/2022/maui/toolkit"
             x:Class="CommunityToolkit.Maui.Sample.Pages.Converters.IsNotEqualConverterPage">

    <ContentPage.Resources>
        <ResourceDictionary>
            <toolkit:IsNotEqualConverter x:Key="IsNotEqualConverter" />
        </ResourceDictionary>
    </ContentPage.Resources>

    <Label Text="The value is not equal to 100"
           IsVisible="{Binding MyValue, Converter={StaticResource IsNotEqualConverter}, ConverterParameter=100}" />

</ContentPage>

C#

The IsNotEqualConverter can be used as follows in C#:

class IsNotEqualConverterPage : ContentPage
{
    public IsNotEqualConverterPage()
    {
        var label = new Label { Text = "The value is not equal to 100" };

		label.SetBinding(
			Label.IsVisibleProperty,
			new Binding(
				nameof(ViewModels.MyValue),
				converter: new IsNotEqualConverter(),
				converterParameter: 100));

		Content = label;
    }
}

C# Markup

Our CommunityToolkit.Maui.Markup package provides a much more concise way to use this converter in C#.

using CommunityToolkit.Maui.Markup;

class IsNotEqualConverterPage : ContentPage
{
    public IsNotEqualConverterPage()
    {
        Content = new Label { Text = "The value is not equal to 100" }
            .Bind(
                Label.IsVisibleProperty,
                static (ViewModel vm) => vm.MyValue,
                converter: new IsNotEqualConverter(),
                converterParameter: 100);
    }
}

Examples

You can find an example of this converter in action in the .NET MAUI Community Toolkit Sample Application.

API

You can find the source code for IsNotEqualConverter over on the .NET MAUI Community Toolkit GitHub repository.