Use JSV for to or from string ValueType conversions

Author: mythz

.gitignore

@@ -42,6 +42,7 @@ App_Data/
 *.resharper.user
 *.suo
 *.user
+.vs/
 
 NuGet/
 NuGet.Pcl/

src/ServiceStack.Text/AutoMappingUtils.cs

@@ -68,10 +68,11 @@ public static object ConvertTo(this object from, Type type)
         private static object ChangeValueType(object from, Type type)
         {
             var strValue = from as string;
-            if (type == typeof(DateTime) && strValue != null)
-                return DateTimeSerializer.ParseShortestXsdDateTime(strValue);
-            if (from is DateTime)
-                return DateTimeSerializer.ToShortestXsdDateTimeString((DateTime)from);
+            if (strValue != null)
+                return TypeSerializer.DeserializeFromString(strValue, type);
+
+            if (type == typeof(string))
+                return from.ToJsv();
 
             return Convert.ChangeType(from, type, provider: null);
         }

tests/ServiceStack.Text.Tests/AutoMappingTests.cs

@@ -585,6 +585,7 @@ public void Does_convert_to_ValueType()
             Assert.That("1.1".ConvertTo(typeof(decimal)), Is.EqualTo(1.1M));
 
             Assert.That("2001-01-01".ConvertTo<DateTime>(), Is.EqualTo(new DateTime(2001, 01, 01)));
+            Assert.That("98ece8400be4452eb6ad7c3a4404f119".ConvertTo<Guid>(), Is.EqualTo(new Guid("98ece8400be4452eb6ad7c3a4404f119")));
         }
 
         [Test]
@@ -595,8 +596,9 @@ public void Does_convert_from_ValueType_to_strings()
             Assert.That(1.1f.ConvertTo(typeof(string)), Is.EqualTo("1.1"));
             Assert.That(1.1d.ConvertTo(typeof(string)), Is.EqualTo("1.1"));
             Assert.That(1.1M.ConvertTo(typeof(string)), Is.EqualTo("1.1"));
-
+            
             Assert.That(new DateTime(2001, 01, 01).ConvertTo<string>(), Is.EqualTo("2001-01-01"));
+            Assert.That(new Guid("98ECE840-0BE4-452E-B6AD-7C3A4404F119").ConvertTo<string>(), Is.EqualTo("98ece8400be4452eb6ad7c3a4404f119"));
         }
 
         [Test]