-

SqlSugar/ExpressionsToSql/BinaryExpressionInfo.cs

@@ -9,7 +9,7 @@ namespace SqlSugar
     public class BinaryExpressionInfo
     {
         public bool IsLeft { get; set; }
-        public ExpressionType ExpressionType { get;set;}
+        public Type ExpressionType { get;set;}
         public object Value { get; set; }
     }
 }

SqlSugar/ExpressionsToSql/ExpressionConst.cs

@@ -1,8 +1,8 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Linq.Expressions;
 using System.Text;
-
 namespace SqlSugar
 {
     internal class ExpressionConst
@@ -11,6 +11,8 @@ namespace SqlSugar
         public const string BinaryFormatString = " ( {0} {1} {2} ) ";
         public const string Format0 = "{0}";
         public const string Format1 = "{1}";
+        public readonly static Type MemberExpressionType = typeof(MemberExpression);
+        public readonly static Type ConstantExpressionType = typeof(ConstantExpression);
         internal static string GetThrowMessage(string enMessage, string cnMessage, params string[] args)
         {
             List<string> formatArgs = new List<string>() { enMessage, cnMessage };
@@ -19,8 +21,6 @@ namespace SqlSugar
         }
     }
     internal partial class ErrorMessage
-
-
     {
         internal static string OperatorError
         {

SqlSugar/ExpressionsToSql/ExpressionContext.cs

@@ -11,6 +11,13 @@ namespace SqlSugar
     {
         public ResolveExpressType Type { get; set; }
         public Expression Expression { get; set; }
+        public virtual string SqlParameterKeyWord
+        {
+            get
+            {
+                return "@";
+            }
+        }
         public virtual string GetaMppingColumnsName(string name)
         {
             return name;

SqlSugar/ExpressionsToSql/ResolveItems/BinaryExpressionResolve.cs

@@ -50,6 +50,13 @@ namespace SqlSugar
         {
             var leftInfo = parameter.BinaryExpressionInfoList.Single(it => it.Value.IsLeft).Value;
             var rightInfo = parameter.BinaryExpressionInfoList.Single(it => !it.Value.IsLeft).Value;
+            if (leftInfo.ExpressionType == ExpressionConst.ConstantExpressionType)
+            {
+                var sqlParameterKeyWord = parameter.Context.SqlParameterKeyWord;
+                var reval= string.Format("{0}{1}{2}",sqlParameterKeyWord,leftInfo.Value,parameter.Context.Index+parameter.Index);
+                parameter.Context.Parameters.Add(new SugarParameter(reval,leftInfo.Value));
+                return reval;
+            }
             return leftInfo.Value.ObjToString();
         }
 

SqlSugar/ExpressionsToSql/ResolveItems/MemberExpressionResolve.cs

@@ -18,7 +18,7 @@ namespace SqlSugar
             {
                 IsLeft = Convert.ToBoolean(IsLeft),
                 Value = fieldName,
-                ExpressionType = expression.NodeType
+                ExpressionType = expression.GetType()
             }));
             if (isLeft == null && base.SqlWhere == null)
             {

SqlSugar/obj/Debug/SqlSugar.csproj.FileListAbsolute.txt

@@ -3,3 +3,4 @@ F:\MyOpenSource\SqlSugar4.XNew\SqlSugar\SqlSugar\bin\Debug\SqlSugar.pdb
 F:\MyOpenSource\SqlSugar4.XNew\SqlSugar\SqlSugar\bin\Debug\Newtonsoft.Json.dll
 F:\MyOpenSource\SqlSugar4.XNew\SqlSugar\SqlSugar\obj\Debug\SqlSugar.dll
 F:\MyOpenSource\SqlSugar4.XNew\SqlSugar\SqlSugar\obj\Debug\SqlSugar.pdb
+F:\MyOpenSource\SqlSugar4.XNew\SqlSugar\SqlSugar\obj\Debug\SqlSugar.csprojResolveAssemblyReference.cache