From 02c2c8843e2ebd650a84832fc19bad388d0a073a Mon Sep 17 00:00:00 2001
From: falcon <9504402@qq.com>
Date: Mon, 6 Feb 2023 15:43:21 +0800
Subject: [PATCH] =?UTF-8?q?=E6=96=B0=E5=A2=9E=E5=AF=B9=E8=B1=A1=E6=98=AF?=
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 =?UTF-8?q?=E6=B3=95IsNull=E5=92=8CIsNotNull?=
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---
 Falcon.SugarApi.Test/ObjectExtendTest.cs | 22 ++++++++++++++++++++++
 Falcon.SugarApi/ObjectExtend.cs          | 14 ++++++++++++++
 2 files changed, 36 insertions(+)

diff --git a/Falcon.SugarApi.Test/ObjectExtendTest.cs b/Falcon.SugarApi.Test/ObjectExtendTest.cs
index 542ed78..80fcbef 100644
--- a/Falcon.SugarApi.Test/ObjectExtendTest.cs
+++ b/Falcon.SugarApi.Test/ObjectExtendTest.cs
@@ -87,6 +87,28 @@ namespace Falcon.SugarApi.Test
                 }
             }
         }
+
+        /// <summary>
+        /// 是否为空测试
+        /// </summary>
+        [TestMethod]
+        public void IsNullTest() {
+            object obj = null;
+            Assert.IsTrue(obj.IsNull());
+            Assert.IsFalse(obj.IsNotNull());
+
+            obj=new object();
+            Assert.IsTrue(obj.IsNotNull());
+            Assert.IsFalse(obj.IsNull());
+
+            object? obj1 = null;
+            Assert.IsTrue(obj1.IsNull());
+            Assert.IsFalse(obj1.IsNotNull());
+
+            obj1=new object();
+            Assert.IsTrue(obj1.IsNotNull());
+            Assert.IsFalse(obj1.IsNull());
+        }
     }
     /// <summary>
     /// 扩展属性测试类
diff --git a/Falcon.SugarApi/ObjectExtend.cs b/Falcon.SugarApi/ObjectExtend.cs
index 95ddbca..eadb356 100644
--- a/Falcon.SugarApi/ObjectExtend.cs
+++ b/Falcon.SugarApi/ObjectExtend.cs
@@ -90,6 +90,20 @@ namespace Falcon.SugarApi
                 };
             }
         }
+
+        /// <summary>
+        /// 对象是否为null
+        /// </summary>
+        /// <param name="obj">要测试的对象</param>
+        /// <returns>True表示对象为null，否则不为null</returns>
+        public static bool IsNull([AllowNull] this object obj) => obj==null;
+
+        /// <summary>
+        /// 对象是否不为null。与IsNull相反
+        /// </summary>
+        /// <param name="obj">要测试的对象</param>
+        /// <returns>True表示对象不为null，否则为null</returns>
+        public static bool IsNotNull([AllowNull] this object obj) => !obj.IsNull();
     }
 
     /// <summary>