How to use common message in the regex pattern from the resource file in asp.net MVC?

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Ravi Vishwakarma · Answer

A regular expression can also be described by a sequence of patterns that define a string. Regular expressions are used to match character combinations in strings. This pattern is used by the string searching algorithm to find the operations in the string.
Let’s discuss the topic 
First of all, create an asp.net MVC project name as WebApplication1
Next, Create a model according to your personality, goto model folder -> right-click -> add button -> class, take class name
ResetPassword model We are creating a ResetPassword model
And then use annotation validation like 
[[Required(AllowEmptyStrings = false, ErrorMessage = 'Can't empty email ')]], [DataType(DataType.Password)],
[Compare('Password',”Password doesn’t match”)]
[StringLength(50, MinimumLength =3)] etc.
In long project use, validation message but everywhere can’t put the same message. So, we use the resource file for storing the messages. The resource file stores value in key-value pair. In resource files, we can store images, strings, text files, etc. We create the resource file in Visual Studio 2019 Go to project -> right-click -> click properties -> Click on Resource button -> select string in header bar
And put name and value, and then save it. Then go to your model import this namespace.
Like using [using yourprojectname.Properties]
eg 
using WebApplication1.Properties; 
Here is CommanRegex
 class for string the all regex pattern
using System;
using System.Text.RegularExpressions;
namespace HelloWorldMVC.Comman{
and  and  public class CommanRegex
and  and  {
and  and  and  and  public const string EmailRegex = '^[\w!#$%and’*and#43;/=?`{|}~^-]and#43;(?:\.[\w!#$%and’*and#43;/=?`{|}~^-]and#43;)*@(?:[a-zA-Z0-9-]and#43;\.)and#43;[a-zA-Z]{2,6}$';
and  and  and  and  public const string PasswordRegex = @'^(?=.*[0-9])(?=.*[a-z])(?=.*[A-Z])(?=.*[@#$%^and-and#43;=()])(?=\Sand#43;$).{8,20}$';
and  and  and  and  public const string FirstNameRegex = @'\w{3,100}';
and  and  and  and  public const string LastNameRegex = @'\w{3,100}';
and  and  and  and  public const string ContactNoRegex = @'\d{10}';
and  and  and  and  public static bool IsValidFirstName(string name)and  and  and  and  {
and  and  and  and  and  and  return Regex.IsMatch(name, FirstNameRegex);
and  and  and  and  }
and  and  and  and  public static bool IsValidPassword(string password)and  and  and  and  {
and  and  and  and  and  and  return Regex.IsMatch(password, PasswordRegex);
and  and  and  and  }
and  and  }
}
Next use annotation validation for email
[Display(Name = 'Email ')]
[Required(AllowEmptyStrings = false, ErrorMessage = 'Can't empty email ')] // without resource file messageand [RegularExpression(pattern: CommanRegex.EmailRegex, ErrorMessageResourceType = typeof(Resources), ErrorMessageResourceName = 'regexEmail')] // from resource file meaasgeand public string Email { get; set; }
In RegularExpression annotation has to take regex pattern and messageand 
ErrorMessageResourceType = typeof(Resources)and  ->and  it is used to identify the resource file nameand 
ErrorMessageResourceName = 'regexEmail'and  and  and  and  and  ->and  it is used to identify the messahe name fromand  resource file
and create your view and run your project. we can see that validation has been successful.
it's showing the message from the resource file because the email doesn't contain the space.
Thank you.

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How to use common message in the regex pattern from the resource file in asp.net MVC?

Ashutosh Kumar Verma

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