ISqlSugarClient Add AsTenant

Src/Asp.Net/SqlSugar/Abstract/SugarProvider/SqlSugarProvider.cs

@@ -1168,5 +1168,14 @@ namespace SqlSugar
             };
         }
         #endregion
+
+        #region AsTenant
+        public ITenant AsTenant()
+        {
+            Check.Exception(true,ErrorMessage.GetThrowMessage("Child objects do not support tenant methods, var childDb= Db.GetConnection(confid)  ,Db is master  ", "Db子对象不支持租户方法，请使用主对象,例如：var childDb= Db.GetConnection(confid)  Db是主对象，childDb是子对象 "));
+            return null;
+        }
+        #endregion
+
     }
 }

Src/Asp.Net/SqlSugar/Interface/ISqlSugarClient.cs

@@ -52,7 +52,8 @@ namespace SqlSugar
         void InitMappingInfo(Type type);
         void InitMappingInfo<T>();
         void Open();
-        void Close(); 
+        void Close();
+        ITenant AsTenant();
         #endregion
 
         #region Insertable

Src/Asp.Net/SqlSugar/SqlSugarClient.cs

@@ -576,6 +576,11 @@ namespace SqlSugar
         #endregion
 
         #region TenantManager
+        public ITenant AsTenant()
+        {
+            var tenant= this as ITenant;
+            return tenant;
+        }
         public SqlSguarTransaction UseTran() 
         {
             return new SqlSguarTransaction(this);

Src/Asp.Net/SqlSugar/SqlSugarScope.cs

@@ -65,6 +65,10 @@ namespace SqlSugar
 
         public SugarCacheProvider DataCache => ScopedContext.DataCache;
 
+        public ITenant AsTenant() 
+        {
+            return ScopedContext.AsTenant();
+        }
         public void AddConnection(ConnectionConfig connection)
         {
             ScopedContext.AddConnection(connection);