How to use military time validation in asp net


ASP.NET is a popular programming language used for developing web applications. One requirement in web applications is to validate user input, such as validating a time input in military format. In this article, we will explore how to use military time validation in ASP.NET with examples.

Using Regular Expressions

Regular expressions are a powerful tool for pattern and can be used to validate various types of input, including military time. In ASP.NET, you can use regular expressions to validate user input and it matches the desired format.

Here's an of how to use regular expressions to validate military time in ASP.NET:

using System;
using System.Text.RegularExpressions;

public bool ValidateMilitaryTime(string input)
    string pattern = @"^([01]?[0-9]|2[0-3]):[0-5][0-9]$";
    Regex regex = new Regex(pattern);
    return regex.IsMatch(input);

In the above example, we define a regular expression pattern that matches the military time format (HH:mm). The pattern allows for hours from 00 to 23 and minutes from 00 to 59. The ValidateMilitaryTime method takes an input string and checks if it matches the pattern using the IsMatch method of the Regex class.

Using Custom Validation Controls

In addition to regular expressions, ASP.NET provides built-in validation controls that can be used to validate user input. These controls offer a convenient way to perform validation without writing custom code.

Here's an example of how to use a custom validation control to validate military time in ASP.NET:

In the above example, we have a text box (txtMilitaryTime) where the user can enter a military time. We also have a custom validator control (cvMilitaryTime) that is associated with the text box using the ControlToValidate property. The ErrorMessage property specifies the error to display if the validation fails.

To perform the validation, we need to handle the OnServerValidate event of the custom validator control. Here's an example of how to the event handler:

protected void cvMilitaryTime_ServerValidate(object source, ServerValidateEventArgs args)
    string input = args.Value;
    args.IsValid = ValidateMilitaryTime(input);

In the event handler, we retrieve the user input from the args.Value property and call the ValidateMilitaryTime method to perform the validation. The result of the validation is in the args.IsValid property, which determines whether the input is valid or not.


Validating user input is an essential part of web . In this article, we explored how to use military time validation in ASP.NET. We discussed two approaches: using regular expressions and using custom validation controls. Both approaches offer effective ways to ensure that user input matches the desired format. By incorporating these techniques into your ASP.NET applications, you can enhance the user experience and improve the overall quality of your web applications.

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