diff --git a/Src/Asp.NetCore2/SqlSugar/Abstract/AdoProvider/AdoProvider.cs b/Src/Asp.NetCore2/SqlSugar/Abstract/AdoProvider/AdoProvider.cs
index a7aa7e32f..4918461ff 100644
--- a/Src/Asp.NetCore2/SqlSugar/Abstract/AdoProvider/AdoProvider.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Abstract/AdoProvider/AdoProvider.cs
@@ -217,20 +217,18 @@ namespace SqlSugar
             if (this.Transaction == null)
                 this.Transaction =await (this.Connection as DbConnection).BeginTransactionAsync();
         }
-        
-        public virtual async Task BeginTranAsync(IsolationLevel iso)
-        {
-            await CheckConnectionAsync();
-            if (this.Transaction == null)
-                this.Transaction =await (this.Connection as DbConnection).BeginTransactionAsync(iso);
-        }
-        
         public virtual void BeginTran(IsolationLevel iso)
         {
             CheckConnection();
             if (this.Transaction == null)
                 this.Transaction = this.Connection.BeginTransaction(iso);
         }
+        public virtual async Task BeginTranAsync(IsolationLevel iso)
+        {
+            await CheckConnectionAsync();
+            if (this.Transaction == null)
+                this.Transaction =await (this.Connection as DbConnection).BeginTransactionAsync(iso);
+        }
         public virtual void RollbackTran()
         {
             if (this.Transaction != null)
diff --git a/Src/Asp.NetCore2/SqlSugar/Abstract/QueryableProvider/NavigatManager.cs b/Src/Asp.NetCore2/SqlSugar/Abstract/QueryableProvider/NavigatManager.cs
index 8f76f1f71..599d23968 100644
--- a/Src/Asp.NetCore2/SqlSugar/Abstract/QueryableProvider/NavigatManager.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Abstract/QueryableProvider/NavigatManager.cs
@@ -562,6 +562,7 @@ namespace SqlSugar
                         queryable.QueryBuilder.LambdaExpressions.ParameterIndex = parameterIndex;
                         CheckHasRootShortName(method.Arguments[0], method.Arguments[1]);
                         var exp = method.Arguments[1];
+                        InitMappingtType(exp);
                         where.Add(" " + queryable.QueryBuilder.GetExpressionValue(exp, ResolveExpressType.WhereSingle).GetString());
                         SetTableShortName(result, queryable);
                         parameterIndex=queryable.QueryBuilder.LambdaExpressions.ParameterIndex ;
@@ -574,6 +575,7 @@ namespace SqlSugar
                     {
                         queryable.QueryBuilder.LambdaExpressions.ParameterIndex = parameterIndex;
                         var exp = method.Arguments[2];
+                        InitMappingtType(exp);
                         CheckHasRootShortName(method.Arguments[1], method.Arguments[2]);
                         where.Add(" " + queryable.QueryBuilder.GetExpressionValue(exp, ResolveExpressType.WhereSingle).GetString());
                         SetTableShortName(result, queryable);
@@ -796,5 +798,21 @@ namespace SqlSugar
             return shortName;
         }
 
+        private void InitMappingtType(Expression exp)
+        {
+            if (exp is LambdaExpression)
+            {
+                var pars = (exp as LambdaExpression).Parameters;
+                if (pars != null)
+                {
+                    foreach (var item in pars)
+                    {
+                        this.Context.InitMappingInfo(item.Type);
+                    }
+                }
+            }
+        }
+
+
     }
 }