RadzenRegexValidator Class

A validator component that ensures a text input matches a specified regular expression pattern. RadzenRegexValidator is useful for validating formats like ZIP codes, phone numbers, custom IDs, or any pattern-based data. Must be placed inside a RadzenTemplateForm<T>. Checks input against a regular expression pattern using .NET's RegularExpressionAttribute. Common use cases include ZIP/postal codes (e.g., "\d{5}" for US ZIP), phone numbers (e.g., "\d{3}-\d{3}-\d{4}"), custom ID formats (e.g., "^[A-Z]{2}\d{6}$"), and alphanumeric constraints (e.g., "^[a-zA-Z0-9]+$"). The validator passes when the value matches the entire pattern (implicit anchoring). Empty or null values are considered valid - combine with RadzenRequiredValidator to ensure the field is filled.

Inheritance

Implements

Inherited Members

Syntax

public class RadzenRegexValidator : ValidatorBase, IComponent, IHandleEvent, IHandleAfterRender, IRadzenFormValidator

Examples

ZIP code validation:

<RadzenTemplateForm TItem="Model" Data=@model>
    <RadzenTextBox style="display: block" Name="ZIP" @bind-Value=@model.Zip />
    <RadzenRegexValidator Component="ZIP" Pattern="^\d{5}$" Text="ZIP code must be 5 digits" Style="position: absolute" />
</RadzenTemplateForm>
@code {
    class Model { public string Zip { get; set; } }
    Model model = new Model();
}

Phone number validation:

<RadzenTextBox Name="Phone" @bind-Value=@model.Phone />
<RadzenRegexValidator Component="Phone" Pattern="^\d{3}-\d{3}-\d{4}$" Text="Format: 123-456-7890" />

Constructors

public RadzenRegexValidator()

Properties

public string Pattern { get; set; }

public string Text { get; set; }

Methods

protected override bool Validate(IRadzenFormComponent component)