diff --git a/OrmTest/Demo/Update.cs b/OrmTest/Demo/Update.cs
index 342713215..8130f06c8 100644
--- a/OrmTest/Demo/Update.cs
+++ b/OrmTest/Demo/Update.cs
@@ -1,4 +1,6 @@
-using System;
+using OrmTest.Models;
+using SqlSugar;
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
@@ -6,7 +8,53 @@ using System.Threading.Tasks;
 
 namespace OrmTest.Demo
 {
-    class Update
+    public class Update
     {
+        public static void Init() {
+            var db = GetInstance();
+            var updateObj = new Student() { Id = 1, Name = "jack", SchoolId = 0, CreateTime = Convert.ToDateTime("2017-05-21 09:56:12.610") };
+            var updateObjs = new List<Student>() { updateObj, new Student() { Id = 2, Name = "sun", SchoolId = 0 } }.ToArray();
+            db.IgnoreColumns.Add("TestId", "Student");
+            //db.MappingColumns.Add("id","dbid", "Student");
+
+
+            //update reutrn Update Count
+            var t1= db.Updateable(updateObj).ExecuteCommand();
+
+            //Only  update  Name 
+            var t3 = db.Updateable(updateObj).UpdateColumns(it => new { it.Name }).ExecuteCommand();
+
+
+            //Ignore  Name and TestId
+            var t4 = db.Updateable(updateObj).IgnoreColumns(it => new { it.Name, it.TestId }).ExecuteCommand();
+
+            //Ignore  Name and TestId
+            var t5 = db.Updateable(updateObj).IgnoreColumns(it => it == "Name" || it == "TestId").With(SqlWith.UpdLock).ExecuteCommand();
+
+
+            //Use Lock
+            var t6 = db.Updateable(updateObj).With(SqlWith.UpdLock).ExecuteCommand();
+
+            //update List<T>
+            var t7 = db.Updateable(updateObjs).ExecuteCommand();
+
+            //Re Set Value
+            var t8 = db.Updateable(updateObj)
+                .ReSetValue(it => it.Name == (it.Name + 1)).ExecuteCommand();
+
+            //Where By Expression
+            var t9 = db.Updateable(updateObj).Where(it => it.Id == 1).ExecuteCommand();
+        }
+        public static SqlSugarClient GetInstance()
+        {
+            SqlSugarClient db = new SqlSugarClient(new SystemTablesConfig() { ConnectionString = Config.ConnectionString, DbType = DbType.SqlServer, IsAutoCloseConnection = true });
+            db.Ado.IsEnableLogEvent = true;
+            db.Ado.LogEventStarting = (sql, pars) =>
+            {
+                Console.WriteLine(sql + "\r\n" + db.RewritableMethods.SerializeObject(pars));
+                Console.WriteLine();
+            };
+            return db;
+        }
     }
 }
diff --git a/OrmTest/Program.cs b/OrmTest/Program.cs
index 155775fa1..6488e73be 100644
--- a/OrmTest/Program.cs
+++ b/OrmTest/Program.cs
@@ -37,6 +37,7 @@ namespace OrmTest
             OrmTest.Demo.Query.Init();
             OrmTest.Demo.Insert.Init();
             OrmTest.Demo.Delete.Init();
+            OrmTest.Demo.Update.Init();
         }
     }
 }
diff --git a/SqlSugar/Abstract/UpdateProvider/UpdateableProvider.cs b/SqlSugar/Abstract/UpdateProvider/UpdateableProvider.cs
index fb326980c..9349e4c5a 100644
--- a/SqlSugar/Abstract/UpdateProvider/UpdateableProvider.cs
+++ b/SqlSugar/Abstract/UpdateProvider/UpdateableProvider.cs
@@ -25,7 +25,7 @@ namespace SqlSugar
         public int ExecuteCommand()
         {
             PreToSql();
-            return this.Ado.ExecuteCommand(UpdateBuilder.ToSqlString(), UpdateBuilder.Parameters.ToArray());
+            return this.Ado.ExecuteCommand(UpdateBuilder.ToSqlString(), UpdateBuilder.Parameters==null?null:UpdateBuilder.Parameters.ToArray());
         }
 
         public IUpdateable<T> IgnoreColumns(Func<string, bool> ignoreColumMethod)