The Join section can write the conditions

SqlServerTest/Demos/1_Query.cs

@@ -229,6 +229,13 @@ namespace OrmTest.Demo
             .OrderBy((st, sc) => sc.Id, OrderByType.Desc)
             .Select((st, sc) => new ViewModelStudent { Name = st.Name, SchoolId = sc.Id }).ToList();
 
+
+            //join  2
+            var list4_1 = db.Queryable<Student, School>((st, sc) => new object[] {
+              JoinType.Left,st.SchoolId==sc.Id&& st.Name == "jack"
+            }).ToList();
+
+
             //The simple use of Join 2 table
             var list5 = db.Queryable<Student, School>((st, sc) => st.SchoolId == sc.Id).Select((st,sc)=>new {st.Name,st.Id,schoolName=sc.Name}).ToList();
 

SqlSugar/SqlSugarAccessory.cs

@@ -181,8 +181,12 @@ namespace SqlSugar
         {
             this.CreateQueryable<T>(queryable);
             string shortName = string.Empty;
-            queryable.SqlBuilder.QueryBuilder.JoinQueryInfos = this.GetJoinInfos(joinExpression, ref shortName, types);
+            List<SugarParameter> paramters =new List<SugarParameter>();
+            queryable.SqlBuilder.QueryBuilder.JoinQueryInfos = this.GetJoinInfos(joinExpression,ref  paramters, ref shortName, types);
             queryable.SqlBuilder.QueryBuilder.TableShortName = shortName;
+            if (paramters != null) {
+                queryable.SqlBuilder.QueryBuilder.Parameters.AddRange(paramters);
+            }
         }
         protected void CreateEasyQueryJoin<T>(Expression joinExpression, Type[] types, ISugarQueryable<T> queryable) where T : class, new()
         {
@@ -194,7 +198,7 @@ namespace SqlSugar
         #endregion
 
         #region Private methods
-        protected List<JoinQueryInfo> GetJoinInfos(Expression joinExpression, ref string shortName, params Type[] entityTypeArray)
+        protected List<JoinQueryInfo> GetJoinInfos(Expression joinExpression,ref List<SugarParameter> parameters, ref string shortName, params Type[] entityTypeArray)
         {
             List<JoinQueryInfo> result = new List<JoinQueryInfo>();
             var lambdaParameters = ((LambdaExpression)joinExpression).Parameters.ToList();
@@ -204,6 +208,7 @@ namespace SqlSugar
             expressionContext.Resolve(joinExpression, ResolveExpressType.Join);
             int i = 0;
             var joinArray = expressionContext.Result.GetResultArray();
+            parameters = expressionContext.Parameters;
             foreach (var entityType in entityTypeArray)
             {
                 var isFirst = i == 0; ++i;