Add:

1. Queryable.AsWithAttr()
2. CodeFirst.InitTableWithAttr()

Src/Asp.Net/SqlSugar/Abstract/CodeFirstProvider/CodeFirstProvider.cs

@@ -45,7 +45,22 @@ namespace SqlSugar
             DefultLength = length;
             return this;
         }
-
+        public void InitTablesWithAttr(params Type[] entityTypes) 
+        {
+            foreach (var item in entityTypes)
+            {
+                var attr = item.GetCustomAttribute<TenantAttribute>();
+                if (attr==null||this.Context?.Root == null)
+                {
+                    this.Context.CodeFirst.InitTables(item);
+                }
+                else
+                {
+                    var newDb = this.Context.Root.GetConnectionWithAttr(item);
+                    newDb.CodeFirst.InitTables(item);
+                }
+            }
+        }
         public virtual void InitTables(Type entityType)
         {
             var splitTableAttribute = entityType.GetCustomAttribute<SplitTableAttribute>();

Src/Asp.Net/SqlSugar/Abstract/QueryableProvider/QueryableProvider.cs

@@ -327,6 +327,12 @@ namespace SqlSugar
             var entityName = typeof(T).Name;
             return _As(tableName, entityName);
         }
+        public ISugarQueryable<T> AsWithAttr() 
+        {
+            var asName=GetTableName(this.EntityInfo, this.EntityInfo.DbTableName);
+            this.QueryBuilder.IsCrossQueryWithAttr = true;
+            return this.AS(asName);
+        }
         public ISugarQueryable<T> AsType(Type tableNameType)
         {
             return AS(this.Context.EntityMaintenance.GetEntityInfo(tableNameType).DbTableName);

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

@@ -16,6 +16,7 @@ namespace SqlSugar
         void InitTables(string entitiesNamespace);
         void InitTables(string[] entitiesNamespaces);
         void InitTables(params Type[] entityTypes);
+        void InitTablesWithAttr(params Type[] entityTypes);
         void InitTables(Type entityType);
         void InitTables<T>();
         void InitTables<T, T2>();

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

@@ -19,6 +19,7 @@ namespace SqlSugar
         ISugarQueryable<T> Clone();
         ISugarQueryable<T> AS<T2>(string tableName);
         ISugarQueryable<T> AS(string tableName);
+        ISugarQueryable<T> AsWithAttr();
         ISugarQueryable<T> AsType(Type tableNameType);
         ISugarQueryable<T> With(string withString);
         //ISugarQueryable<T> CrossQueryWithAttr();

Src/Asp.Net/SqlSugar/SqlSugarClient.cs

@@ -875,6 +875,14 @@ namespace SqlSugar
             var configId = attr.configId;
             return this.GetConnection(configId);
         }
+        public SqlSugarProvider GetConnectionWithAttr(Type type)
+        {
+            var attr = type.GetCustomAttribute<TenantAttribute>();
+            if (attr == null)
+                return this.GetConnection(this.CurrentConnectionConfig.ConfigId);
+            var configId = attr.configId;
+            return this.GetConnection(configId);
+        }
         public SqlSugarScopeProvider GetConnectionScopeWithAttr<T>()
         {
             var attr = typeof(T).GetCustomAttribute<TenantAttribute>();