添加using System.Data;

Areas/Admin/Controllers/MainServer/StoreBalanceController.cs

@@ -7,6 +7,7 @@ using System.Web;
 using System.Collections.Generic;
 using System.Diagnostics;
 using System.Linq;
+using System.Data;
 using System.Threading.Tasks;
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.AspNetCore.Http;

Areas/Admin/Controllers/MainServer/UserStoreChangeController.cs

@@ -7,6 +7,7 @@ using System.Web;
 using System.Collections.Generic;
 using System.Diagnostics;
 using System.Linq;
+using System.Data;
 using System.Threading.Tasks;
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.AspNetCore.Http;