ConvertClientValue - use IsAssignableFrom (#452)

Author: AlekseyMartynov

net/DevExtreme.AspNet.Data.Tests/UtilsTests.cs

@@ -74,10 +74,37 @@ public void GetPrimaryKey_MultiKey() {
 
         [Fact]
         public void ConvertClientValue_TrivialConversion() {
-            var value = typeof(UtilsTests);
+            object value = typeof(UtilsTests);
             Assert.Same(value, Utils.ConvertClientValue(value, value.GetType()));
         }
 
+        [Fact]
+        public void ConvertClientValue_ToBaseType() {
+            object value = typeof(int);
+            Assert.Same(value, Utils.ConvertClientValue(value, typeof(Type)));
+        }
+
+        [Fact]
+        public void ConvertClientValue_ToImplementedInterface() {
+            object value = 123;
+            Assert.Same(value, Utils.ConvertClientValue(value, typeof(IConvertible)));
+        }
+
+        [Fact]
+        public void ConvertClientValue_ToSameNullable() {
+            object value = 123;
+            Assert.Same(value, Utils.ConvertClientValue(value, typeof(int?)));
+        }
+
+        [Fact]
+        public void ConvertClientValue_Numeric() {
+            // https://stackoverflow.com/q/30080763 - notes about IsAssignableFrom
+            object input = 123;
+            object output = Utils.ConvertClientValue(input, typeof(long));
+            Assert.NotSame(input, output);
+            Assert.Equal(123L, output);
+        }
+
     }
 
 }

net/DevExtreme.AspNet.Data/Utils.cs

@@ -36,7 +36,7 @@ public static object ConvertClientValue(object value, Type type) {
             if(value == null || type == null)
                 return value;
 
-            if(value.GetType() == type)
+            if(type.IsAssignableFrom(value.GetType()))
                 return value;
 
             type = StripNullableType(type);