C# 数据库文件大于配置的最大数据库大小。这是什么意思？

您好，我在更新sql compact数据库时有时会遇到此异常。 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)

我知道这可能是大小的原因，因为前几天我手动将我的数据库大小设置为4GB

     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();
}

这个异常不会对我的功能产生太大影响，但我很好奇可能会出什么问题。此异常通常发生在名为

SavePacket（EnergyMeter\u Grid e）

的位置，如上面的异常日志所示

存储包（能量表网格e）代码：

代码说明：很简单，我所做的只是打开一个上下文，将energyMeter_gridtable值作为参数转换为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??

---

您是否已将max db sizeYes i配置为4091-（4gb）以便准确。您使用了哪个SQL CE版本？首先检查此DB size参数说明：，然后尝试在SDF连接字符串中使用size参数：

Data Source=[Database Name].SDF；最大数据库大小=4096

我正在使用的Hi版本4.0。限额是4091。我应该提到上面这个例外，我偶尔会遇到一次，可能是一天一次左右。你的实际数据库大小是否超过了4091MB的限制？尝试使用

Shrink

（）和

Compact

（）压缩数据库大小。

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