ASP.NET Core Input Mask Control | Masked Textbox

Overview

The ASP.NET Core Input Mask or masked textbox is a control that provides an easy and reliable way to collect user input based on a standard mask. It allows you to capture phone numbers, date values, credit card numbers, and other standard format values.

Standard mask

The input mask control supports the standard masks listed on MSDN.

Standard mask documentation

Custom mask

Other than the standard mask elements, any custom character also can be a mask element by defining rules for it.

Custom mask documentation

Regular expression

The mask elements can be regular expressions, which is useful when defining user-specific data such as IP addresses.

Regular expression mask documentation

Mask input combinations

The input mask control allows different mask combinations based on the standard and custom masks. So, you can form different mask formats based on your application scenarios.

ASP.NET Core input mask with number masking

Number mask

From the standard mask elements, form a number mask for capturing any finite-length number to get number inputs such as phone numbers and credit card numbers.

ASP.NET Core input mask with string masking

String mask

In the case of a country code or product key input, where the input string requires uppercase characters, the string mask format will enforce this.

ASP.NET Core input mask with date masking

Date mask

The mask can form any date format to get similarly formatted date values. This is helpful in getting culture-specific date values by defining the corresponding date mask.

Number, string, and date mask example

Form support and validation

As a form component, the captured value of a masked textbox control proceeds in the raw format when submitting the form.

You can also integrate the form validator plugin to perform any custom validation.

HTML5 input type support

You can create the masked textbox control from the HTML5 tel input. It opens the numeric keypad on mobile devices, which is useful for obtaining phone numbers or any other number-only inputs.

ASP.NET Core input mask with mobile numeric keypad support

Other supported frameworks

Input Mask is also available in Blazor, Angular, React, Vue, and JavaScript frameworks. Check out the different Input Mask platforms from the links below,

Web accessibility

Fully supports WAI-ARIA accessibility to work with screen readers and assistive devices.
Follows WAI-ARIA best practices for implementing keyboard interaction.
Designs the UI element visuals such as foreground color, background color, line spacing, text, and images based on WCAG 2.0 standard.

Developer-friendly APIs

Developers can customize all UI elements and control behaviors of the ASP.NET Core input mask according to the end user’s requirements using its rich set of client-side APIs.

Rated by users across the globe

Great and flexible controls to build web applications

Controls meet specifications to develop web applications (ASP.NET MVC and Core in my case) and provide a lot of features to develop world-class software. There are options for other frameworks/platforms. Support is excellent which makes me feel very confident when facing trouble, they provide answers in 24 hours. Support team will make a big effort to solve your issues and they are ready for a phone call and to remotely connect to your PC.

Jorge M,

Founder and Software Architect, Small-Business

Great tool, saves alot of time, and great support

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