fix dappfix error

EVCB_OCPP.WSServer/Service/LoadingBalanceService.cs

@@ -291,7 +291,7 @@ namespace EVCB_OCPP.WSServer.Service
                 {
                     string txSql = "SELECT TOP(1) [Id] from [dbo].[TransactionRecord] where ChargeBoxId=@ChargeBoxId and StopTime = '1991-01-01 00:00:00.000'; ";
                     var param = new DynamicParameters();
-                    param.Add("ChargeBoxId", chargeboxid, size: 50);
+                    param.Add("ChargeBoxId", chargeboxid, DbType.String, ParameterDirection.Input, size: 50);
                     var txId = await conn.ExecuteScalarAsync<Int64>(txSql, param);
                     if (txId > 0)
                     {
@@ -319,7 +319,7 @@ namespace EVCB_OCPP.WSServer.Service
 
                 string offlineChargerSql = "Select ChargeBoxId from [dbo].[Machine] where Id in @machineIds and [Online]=0; ";
                 var sqlParams = new DynamicParameters();
-                sqlParams.Add("@machineIds", machineIds, DbType.String, ParameterDirection.Input, 36);
+                sqlParams.Add("@machineIds", machineIds, size: 36);
                 result = (await conn.QueryAsync<string>(offlineChargerSql, sqlParams)).ToList();
                 foreach (var charger in result)
                 {