Enable /Disable Validation in WPF

Some time it is business requirement to temporarily suspend validation, recently I come across this situation so as all developer do I took the lazy way and try to find solution in web but I didn't find any suitable solution so I have decided to write my own. You can download the complete source code form hear.     

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using System; using System.Globalization; using System.Text.RegularExpressions; using System.Windows.Controls; namespace EnableDisableValidation.ValidationRules { public class ValidateContactNumber : ValidationRule { public ValidateContactNumber() { this.IsValidate = true; } /// <summary> /// Get or Set the is validate. /// </summary> public Boolean IsValidate { get; set; } /// <summary> /// Implementation of phone number validation. /// </summary> /// <param name="value"></param> /// <param name="cultureInfo"></param> /// <returns></returns> /// <Developer>Kaushik Kumar Mistry</Developer> /// <DateCreated>25 May 2013</DateCreated> /// <ModifiedBy>...</ModifiedBy> /// <ModifiedDate>...</ModifiedDate> public override ValidationResult Validate(object value, CultureInfo cultureInfo) { ValidationResult result = new ValidationResult(true, null); if (this.IsValidate) { String strContactNumber = value as String; if (String.IsNullOrEmpty(strContactNumber)) result = new ValidationResult(true, null); else if (Regex.IsMatch(strContactNumber, @"^\d{3}-?\d{3}-?\d{4}$") == false) result = new ValidationResult(false, "Invalid Phone number."); } return result; } } }

As you can see if the rule is active then it will simply return a ValidationResult so everything will be as though as you didn’t have validation rules in xaml.