.NET MAUI Regex Mask

To validate the user input as a standard (alphanumeric) user input against a regular expression, use the RegexMaskedEntry, which provides errors if the regular expression (regex) rule is not matched. The resulting value is a string.

Regex	Usage
"[0-9]"	a single digit
"[0-9]{1}"	a single digit (required)
"[a-zA-Z]"	a single letter
"[a-zA-Z]{1}"	a single letter (required)
"\S"	all symbols without space
"."	all symbols
"[0-9a-zA-Z]"	all without special symbols and space
"[0-9a-zA-Z ]"	all without special symbols

The following example demonstrates how to set the RadRegexMaskedEntry:

xaml

<telerik:RadRegexMaskedEntry x:Name="regexMaskedEntry" Mask="^[a-z]$" Placeholder="^[a-z]$" AutomationId="regexMask"/>

The image below shows the end result.

For the MaskedEntry Regex Mask examples, go to the SDKBrowser Demo Application and navigate to MaskedEntry -> Mask Types category.

See Also

• Getting Started
• Validation
• Null Values Support
• Events
• Globalization