How To Use Regex Based Masking In .NET MAUI Sfmaskedentry

The MaskType property provides built-in support for regex-based masking, allowing you to define custom input patterns using regular expressions.

To validate user input with a regular expression, set the MaskType property to RegEx and specify the desired pattern through the Mask property:

• When MaskType = RegEx, the control validates user input against the specified regular expression pattern.
• The Mask property defines the regex rule that users must follow while entering data.

This approach enables advanced input validation and helps ensure that users enter data in the required format.

Benefits of Using Regex-Based Masking

• Supports complex and custom validation requirements.
• Restricts input based on regular expression patterns.
• Improves data accuracy and consistency.
• Reduces the need for additional validation logic.
• Provides flexibility for handling various input formats.

Example Scenario

Here an input field for email validation using a regular expression pattern:

MainPage.xaml

<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:editors="clr-namespace:Syncfusion.Maui.Inputs;assembly=Syncfusion.Maui.Inputs"
             Title="How to Use Regex-Based Masking in .NET MAUI SfMaskedEntry"
             x:Class="MaskedEntrySample.MainPage">
    <VerticalStackLayout>
        <editors:SfMaskedEntry WidthRequest="250"
                       ClearButtonVisibility="WhileEditing"
                       MaskType="RegEx"
                       Mask="[A-Za-z0-9._%-]+@[A-Za-z0-9]+\.[A-Za-z]{2,3}">
        </editors:SfMaskedEntry>
    </VerticalStackLayout>
</ContentPage>