diff --git a/Src/Asp.Net/SqlSugar/ExpressionsToSql/ExpressionContext.cs b/Src/Asp.Net/SqlSugar/ExpressionsToSql/ExpressionContext.cs
index 37708258e..89786c712 100644
--- a/Src/Asp.Net/SqlSugar/ExpressionsToSql/ExpressionContext.cs
+++ b/Src/Asp.Net/SqlSugar/ExpressionsToSql/ExpressionContext.cs
@@ -16,10 +16,25 @@ namespace SqlSugar
     {
         #region Fields
         private bool _IsSingle = true;
+        private IDbMethods _DbMehtods { get; set; }
         #endregion
 
         #region properties
-        public IDbMethods DbMehtods { get; set; }
+        public IDbMethods DbMehtods
+        {
+            get
+            {
+                if (_DbMehtods == null)
+                {
+                    _DbMehtods = new DefaultDbMethod();
+                }
+                return _DbMehtods;
+            }
+            set
+            {
+                _DbMehtods = value;
+            }
+        }
         public int Index { get; set; }
         public int ParameterIndex { get; set; }
         public MappingColumnList MappingColumns { get; set; }
diff --git a/Src/Asp.Net/SqlSugar/ExpressionsToSql/Method/DefaultDbMethod.cs b/Src/Asp.Net/SqlSugar/ExpressionsToSql/Method/DefaultDbMethod.cs
index 676a10fbc..a2e12a61d 100644
--- a/Src/Asp.Net/SqlSugar/ExpressionsToSql/Method/DefaultDbMethod.cs
+++ b/Src/Asp.Net/SqlSugar/ExpressionsToSql/Method/DefaultDbMethod.cs
@@ -6,7 +6,7 @@ using System.Text;
 using System.Threading.Tasks;
 namespace SqlSugar
 {
-    public abstract partial class DefaultDbMethod : IDbMethods
+    public  partial class DefaultDbMethod : IDbMethods
     {
         public virtual string IIF(MethodCallExpressionModel model)
         {
@@ -260,5 +260,15 @@ namespace SqlSugar
             var parameter1 = model.Args[1];
             return string.Format("{0}", parameter1.MemberValue);
         }
+
+        public virtual string True()
+        {
+            return "( 1 = 1 ) ";
+        }
+
+        public virtual string False()
+        {
+            return "( 1 = 2 ) ";
+        }
     }
 }
diff --git a/Src/Asp.Net/SqlSugar/ExpressionsToSql/Method/IDbMethods.cs b/Src/Asp.Net/SqlSugar/ExpressionsToSql/Method/IDbMethods.cs
index 394da7101..c91dc1a0e 100644
--- a/Src/Asp.Net/SqlSugar/ExpressionsToSql/Method/IDbMethods.cs
+++ b/Src/Asp.Net/SqlSugar/ExpressionsToSql/Method/IDbMethods.cs
@@ -47,5 +47,7 @@ namespace SqlSugar
         string AggregateMax(MethodCallExpressionModel model);
         string AggregateCount(MethodCallExpressionModel model);
         string MappingColumn(MethodCallExpressionModel model);
+        string True();
+        string False();
     }
 }
diff --git a/Src/Asp.Net/SqlSugar/ExpressionsToSql/ResolveItems/ConstantExpressionResolve.cs b/Src/Asp.Net/SqlSugar/ExpressionsToSql/ResolveItems/ConstantExpressionResolve.cs
index 1bda1f732..82ac23e5b 100644
--- a/Src/Asp.Net/SqlSugar/ExpressionsToSql/ResolveItems/ConstantExpressionResolve.cs
+++ b/Src/Asp.Net/SqlSugar/ExpressionsToSql/ResolveItems/ConstantExpressionResolve.cs
@@ -35,7 +35,7 @@ namespace SqlSugar
                         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 ) ");
+                            this.Context.Result.Append(value.ObjToBool() ? this.Context.DbMehtods.True() :this.Context.DbMehtods.False());
                             break;
                         }
                         if (parentIsBinary && value != null && value.GetType() == PubConst.BoolType && parameter.BaseExpression != null)
@@ -47,7 +47,7 @@ namespace SqlSugar
                                parameter.BaseExpression.NodeType == ExpressionType.OrElse;
                             if (isLogicOperator)
                             {
-                                AppendMember(parameter, isLeft, (value.ObjToBool() ? "( 1 = 1 ) " : "( 1 = 2 ) "));
+                                AppendMember(parameter, isLeft, (value.ObjToBool() ? this.Context.DbMehtods.True(): this.Context.DbMehtods.False()));
                                 break;
                             }
                         }