Added email validation method

framework/src/Volo.Abp.Validation/Volo/Abp/Validation/ValidationHandler.cs

@@ -0,0 +1,20 @@
+using System.Text.RegularExpressions;
+
+namespace Volo.Abp.Validation
+{
+    public class ValidationHandler
+    {
+        private const string EmailRegEx = @"[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?";
+
+        public static bool IsValidEmailAddress(string email)
+        {
+            if (string.IsNullOrEmpty(email))
+            {
+                return false;
+            }
+
+            /*RFC 2822 (simplified)*/
+            return Regex.IsMatch(email, EmailRegEx, RegexOptions.Compiled | RegexOptions.IgnoreCase);
+        }
+    }
+}

framework/test/Volo.Abp.Validation.Tests/Volo/Abp/Validation/ApplicationService_Validation_Tests.cs

@@ -145,6 +145,22 @@ namespace Volo.Abp.Validation
             _myAppService.MyMethodWithNullableEnum(null);
         }
 
+        [Fact]
+        public void Should_Validate_Emails()
+        {
+            //Valid
+            ValidationHandler.IsValidEmailAddress("john.doe@domain.com").ShouldBe(true);
+            ValidationHandler.IsValidEmailAddress("ip@1.2.3.123").ShouldBe(true);
+            ValidationHandler.IsValidEmailAddress("pharaoh@egyptian.museum").ShouldBe(true);
+            ValidationHandler.IsValidEmailAddress("john.doe+regexbuddy@gmail.com").ShouldBe(true);
+            ValidationHandler.IsValidEmailAddress("Mike.O'Dell@ireland.com").ShouldBe(true);
+
+            //Invalid
+            ValidationHandler.IsValidEmailAddress("1024x768@60Hz").ShouldBe(false);
+            ValidationHandler.IsValidEmailAddress("not.a.valid.email").ShouldBe(false);
+            ValidationHandler.IsValidEmailAddress("john@aol...com").ShouldBe(false);
+        }
+
         [DependsOn(typeof(AbpAutofacModule))]
         [DependsOn(typeof(AbpValidationModule))]
         public class TestModule : AbpModule