扩展Object增加TryModelValidation方法，验证模型是否可以通过验证，并增加测试

Falcon.SugarApi.Test/ModelValidationTest.cs

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+using Falcon.SugarApi.ModelValidation;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.Linq;
+
+namespace Falcon.SugarApi.Test
+{
+    /// <summary>
+    /// Json序列化测试
+    /// </summary>
+    [TestClass]
+    public class ModelValidationTest
+    {
+        [TestMethod]
+        public void ValidateTest() {
+            TestModel model;
+            List<ValidationResult> results;
+            bool r;
+
+            model = new TestModel {
+                Age = "30",
+                Name = "Tom",
+            };
+            r = model.TryModelValidation(out results);
+            Assert.IsTrue(r);
+            Assert.IsTrue(results != null);
+            Assert.IsTrue(results.Count == 0);
+
+            model = new TestModel {
+                Age = "60",
+            };
+            r = model.TryModelValidation(out results);
+            Assert.IsFalse(r);
+            Assert.IsTrue(results.Count == 2);
+
+            model = new TestModel {
+                MaxLength = "111111111111111111",
+                Name = "Tom",
+                Age = "30",
+            };
+            r = model.TryModelValidation(out results);
+            Assert.IsFalse(r);
+            Assert.IsTrue(results.Count == 1);
+
+            model = new TestModel {
+                Name = "abc",
+                Age = "20",
+                IsIntProp = "abc",
+                MaxLength = "1",
+            };
+            r = model.TryModelValidation(out results);
+            Assert.IsFalse(r);
+            Assert.IsTrue(results.Count == 1);
+            Assert.IsTrue(results.First().MemberNames.First() == "IsIntProp");
+        }
+        /// <summary>
+        /// 测试用模型
+        /// </summary>
+        public class TestModel
+        {
+            [Required]
+            public string Name { get; set; }
+
+            [Range(10, 50)]
+            public string Age { get; set; }
+
+            [MaxLength(3)]
+            public string MaxLength { get; set; }
+
+            [IsInt]
+            public string IsIntProp { get; set; } = "123";
+        }
+    }
+}

Falcon.SugarApi/ModelValidation/ObjectValidateExtend.cs

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+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+
+namespace Falcon.SugarApi.ModelValidation
+{
+    /// <summary>
+    /// 扩展对象验证方法
+    /// </summary>
+    public static class ObjectValidateExtend
+    {
+        /// <summary>
+        /// 尝试执行对象验证，返回验证结果
+        /// </summary>
+        /// <param name="model">要验证的模型</param>
+        /// <param name="results">验证结果</param>
+        /// <returns>通过验证True，否则False</returns>
+        public static bool TryModelValidation(this object model, out List<ValidationResult> results) {
+            var context = new ValidationContext(model);
+            results = new List<ValidationResult>();
+            return Validator.TryValidateObject(model, context, results, true);
+        }
+    }
+}