Question

我有时在更新我的sql compact数据库时遇到此异常。错误如下：

2/6/2017 11:06:08 AM ERROR IN SavePacket(EnergyMeter_Grid e) data into file
 System.Data.Entity.Infrastructure.DbUpdateException: An error occurred while updating the entries. See the inner exception for details. ---> System.Data.Entity.Core.UpdateException: An error occurred while updating the entries. See the inner exception for details. ---> System.Data.SqlServerCe.SqlCeException: The database file is larger than the configured maximum database size. This setting takes effect on the first concurrent database connection only. [ Required Max Database Size (in MB; 0 if unknown) = 21 ]
   at System.Data.SqlServerCe.SqlCeCommand.ProcessResults(Int32 hr)
   at System.Data.SqlServerCe.SqlCeCommand.ExecuteCommandText(IntPtr& pCursor, Boolean& isBaseTableCursor)
   at System.Data.SqlServerCe.SqlCeCommand.ExecuteCommand(CommandBehavior behavior, String method, ResultSetOptions options)
   at System.Data.SqlServerCe.SqlCeCommand.ExecuteNonQuery()
   at System.Data.Entity.SqlServerCompact.SqlCeMultiCommand.ExecuteNonQuery()
   at System.Data.Entity.Infrastructure.Interception.InternalDispatcher`1.Dispatch[TTarget,TInterceptionContext,TResult](TTarget target, Func`3 operation, TInterceptionContext interceptionContext, Action`3 executing, Action`3 executed)
   at System.Data.Entity.Infrastructure.Interception.DbCommandDispatcher.NonQuery(DbCommand command, DbCommandInterceptionContext interceptionContext)
   at System.Data.Entity.Core.Mapping.Update.Internal.DynamicUpdateCommand.Execute(Dictionary`2 identifierValues, List`1 generatedValues)
   at System.Data.Entity.Core.Mapping.Update.Internal.UpdateTranslator.Update()
   --- End of inner exception stack trace ---
   at System.Data.Entity.Core.Mapping.Update.Internal.UpdateTranslator.Update()
   at System.Data.Entity.Core.Objects.ObjectContext.ExecuteInTransaction[T](Func`1 func, IDbExecutionStrategy executionStrategy, Boolean startLocalTransaction, Boolean releaseConnectionOnSuccess)
   at System.Data.Entity.Core.Objects.ObjectContext.SaveChangesToStore(SaveOptions options, IDbExecutionStrategy executionStrategy, Boolean startLocalTransaction)
   at System.Data.Entity.Core.Objects.ObjectContext.SaveChangesInternal(SaveOptions options, Boolean executeInExistingTransaction)
   at System.Data.Entity.Internal.InternalContext.SaveChanges()
   --- End of inner exception stack trace ---
   at System.Data.Entity.Internal.InternalContext.SaveChanges()
   at ILS.DB.DbUpdateLoop.SavePacket(EnergyMeter_Grid e)

我知道这可能是造成尺寸的原因，因为其他日子我手动将我的数据库的大小设为4 GB。

     using (var context = Context.Create("C:\\XSR_BIB_V2\\XSR_BIB_V2_DATABASE.sdf", "", 4091))
                    {
                        if (DbUpdateLoop.context.Database.Connection.State == System.Data.ConnectionState.Closed)
                            DbUpdateLoop.context.Database.Connection.Open();
}

这个例外不会影响我的功能，但我很好奇是可能出错的。这个异常通常发生在这个名为SavePacket(EnergyMeter_Grid e)的地方，你可以从上面的异常日志中看到。

savePacket（energyMeter grid e）代码::::

if (DbUpdateLoop.context.Database.Connection.State == System.Data.ConnectionState.Closed)
                {
                    DbUpdateLoop.context.Database.Connection.Open();
                }

                if (e == null)
                    throw new ArgumentNullException("Energy Meter Packet");
                EnergyMeter_Grid eInfo = new EnergyMeter_Grid(e.MeterId, e.KW, e.KWh, e.EId);
                using (context.Database.BeginTransaction())
                {
                    context.EnergyMeter_GridTbl.Add(eInfo);
                }
                context.SaveChanges();

代码的解释：它很简单，我正在做的就是打开一个上下文并将energyMeter_gridtable值作为param转换为sql compact db并保存更改。

would love if someone one tell me why this error is happening and what should i do to resolve it??

数据库文件大于配置的最大数据库大小。这是什么意思？

0 个答案: