diff --git a/SqlServerTest/Demos/1_Query.cs b/SqlServerTest/Demos/1_Query.cs
index 0e53dcd3d..d96f0a571 100644
--- a/SqlServerTest/Demos/1_Query.cs
+++ b/SqlServerTest/Demos/1_Query.cs
@@ -119,9 +119,11 @@ namespace OrmTest.Demo
         private static void Ado()
         {
             var db = GetInstance();
+            db.Ado.BeginTran();
             var t1 = db.Ado.SqlQuery<string>("select 'a'");
             var t2 = db.Ado.GetInt("select 1");
             var t3 = db.Ado.GetDataTable("select 1 as id");
+            db.Ado.CommitTran();
             //more
             //db.Ado.GetXXX...
         }
diff --git a/SqlServerTest/Program.cs b/SqlServerTest/Program.cs
index caafd709e..114e595ba 100644
--- a/SqlServerTest/Program.cs
+++ b/SqlServerTest/Program.cs
@@ -18,18 +18,18 @@ namespace OrmTest
         static void Main(string[] args)
         {
             /***Unit Test***/
-            new Field(1).Init();
-            new Where(1).Init();
-            new Method(1).Init();
-            new JoinQuery(1).Init();
-            new SingleQuery(1).Init();
-            new SelectQuery(1).Init();
-            new AutoClose(1).Init();
-            new Insert(1).Init();
-            new Delete(1).Init();
-            new Update(1).Init();
-            new Mapping(1).Init();
-            new DataTest(1).Init();
+            //new Field(1).Init();
+            //new Where(1).Init();
+            //new Method(1).Init();
+            //new JoinQuery(1).Init();
+            //new SingleQuery(1).Init();
+            //new SelectQuery(1).Init();
+            //new AutoClose(1).Init();
+            //new Insert(1).Init();
+            //new Delete(1).Init();
+            //new Update(1).Init();
+            //new Mapping(1).Init();
+            //new DataTest(1).Init();
             /***Performance Test***/
             new SqlSugarPerformance(100).Select();
 
diff --git a/SqlServerTest/UnitTest/ExpressionTest/Where.cs b/SqlServerTest/UnitTest/ExpressionTest/Where.cs
index ce4965bb6..fc6f74d56 100644
--- a/SqlServerTest/UnitTest/ExpressionTest/Where.cs
+++ b/SqlServerTest/UnitTest/ExpressionTest/Where.cs
@@ -34,6 +34,7 @@ namespace OrmTest.UnitTest
                 whereSingle11();
                 whereSingle12();
                 whereSingle13();
+                whereSingle14();
                 WhereMultiple1();
                 WhereMultiple2();
           
@@ -235,6 +236,19 @@ namespace OrmTest.UnitTest
  
             }, "whereSingle13");
         }
+
+        private void whereSingle14()
+        {
+            Expression<Func<Student, bool>> exp = it =>true&& it.Name != null;
+            ExpressionContext expContext = new ExpressionContext();
+            expContext.Resolve(exp, ResolveExpressType.WhereSingle);
+            var value = expContext.Result.GetString();
+            var pars = expContext.Parameters;
+            base.Check(value, pars, "(( 1 = 1 ) AND( [Name] IS NOT NULL ))", new List<SugarParameter>()
+            {
+
+            }, "whereSingle14");
+        }
     }
 
     public class WhereConst
diff --git a/SqlSugar/ExpressionsToSql/ResolveItems/BaseResolve.cs b/SqlSugar/ExpressionsToSql/ResolveItems/BaseResolve.cs
index 69c47a37e..86c69f944 100644
--- a/SqlSugar/ExpressionsToSql/ResolveItems/BaseResolve.cs
+++ b/SqlSugar/ExpressionsToSql/ResolveItems/BaseResolve.cs
@@ -106,7 +106,22 @@ namespace SqlSugar
             }
             return null;
         }
+        protected void AppendMember(ExpressionParameter parameter, bool? isLeft, object appendValue) {
 
+            Context.ParameterIndex++;
+            if (isLeft == true)
+            {
+                appendValue += ExpressionConst.Format1 + parameter.BaseParameter.Index;
+            }
+            if (this.Context.Result.Contains(ExpressionConst.Format0))
+            {
+                this.Context.Result.Replace(ExpressionConst.Format0, appendValue.ObjToString());
+            }
+            else
+            {
+                this.Context.Result.Append(appendValue);
+            }
+        }
         protected void AppendValue(ExpressionParameter parameter, bool? isLeft, object value)
         {
             if (parameter.BaseExpression is BinaryExpression || parameter.BaseExpression == null)
diff --git a/SqlSugar/ExpressionsToSql/ResolveItems/ConstantExpressionResolve.cs b/SqlSugar/ExpressionsToSql/ResolveItems/ConstantExpressionResolve.cs
index 899503a41..cb9fb56b8 100644
--- a/SqlSugar/ExpressionsToSql/ResolveItems/ConstantExpressionResolve.cs
+++ b/SqlSugar/ExpressionsToSql/ResolveItems/ConstantExpressionResolve.cs
@@ -33,11 +33,18 @@ namespace SqlSugar
                     {
                         var parentIsBinary = parameter.BaseParameter.CurrentExpression is BinaryExpression;
                         var parentIsRoot = parameter.BaseParameter.CurrentExpression is LambdaExpression;
-                        if (parentIsRoot&& value!=null&&value.GetType()==PubConst.BoolType) {
-                            this.Context.Result.Append(value.ObjToBool()?"( 1 = 1 ) ": "( 1 = 2 ) ");
+                        if (parentIsRoot && value != null && value.GetType() == PubConst.BoolType)
+                        {
+                            this.Context.Result.Append(value.ObjToBool() ? "( 1 = 1 ) " : "( 1 = 2 ) ");
                             break;
                         }
-                        if (value == null && parentIsBinary) {
+                        if (parentIsBinary && value != null && value.GetType() == PubConst.BoolType && parameter.OppsiteExpression is BinaryExpression)
+                        {
+                            AppendMember(parameter,isLeft,(value.ObjToBool() ? "( 1 = 1 ) " : "( 1 = 2 ) "));
+                            break;
+                        }
+                        if (value == null && parentIsBinary)
+                        {
                             parameter.BaseParameter.ValueIsNull = true;
                             value = "NULL";
                         }