MonoTouch的SQLite的插入錯誤 - 無法打開數據庫文件

我使用MonoTouch的和已經運行與SQLite的一些問題：刀片MonoTouch的SQLite的插入錯誤 - 無法打開數據庫文件

經過幾百甚至幾千，到SQLite數據庫，使用iPad在Mac上模擬器，會出現以下錯誤：

<< 

    Mono.Data.Sqlite.SqliteException: Unable to open the database file 
     at Mono.Data.Sqlite.SQLite3.Reset (Mono.Data.Sqlite.SqliteStatement stmt) 
    [0x0008a] in /Developer/MonoTouch/Source/mono/mcs/class/Mono.Data.Sqlite/Mono.Data.Sqlite_2.0/SQLite3.cs:226 
     at Mono.Data.Sqlite.SQLite3.Step (Mono.Data.Sqlite.SqliteStatement stmt) 
    [0x00046] in /Developer/MonoTouch/Source/mono/mcs/class/Mono.Data.Sqlite/Mono.Data.Sqlite_2.0/SQLite3.cs:168 
     at Mono.Data.Sqlite.SqliteDataReader.NextResult() [0x00129] in 
    /Developer/MonoTouch/Source/mono/mcs/class/Mono.Data.Sqlite/Mono.Data.Sqlite_2.0/SQLiteDataReader.cs:908 
     at Mono.Data.Sqlite.SqliteDataReader..ctor (Mono.Data.Sqlite.SqliteCommand 
    cmd, CommandBehavior behave) [0x00051] in /Developer/MonoTouch/Source/mono/mcs/class/Mono.Data.Sqlite/Mono.Data.Sqlite_2.0/SQLiteDataReader.cs:89 
     at (wrapper remoting-invoke-with-check) Mono.Data.Sqlite.SqliteDataReader:.ctor (Mono.Data.Sqlite.SqliteCommand,System.Data.CommandBehavior) 
     at Mono.Data.Sqlite.SqliteCommand.ExecuteReader (CommandBehavior behavior) [0x00006] in 
    /Developer/MonoTouch/Source/mono/mcs/class/Mono.Data.Sqlite/Mono.Data.Sqlite_2.0/SQLiteCommand.cs:539 
     at Mono.Data.Sqlite.SqliteCommand.ExecuteNonQuery() [0x00000] in 
    /Developer/MonoTouch/Source/mono/mcs/class/Mono.Data.Sqlite/Mono.Data.Sqlite_2.0/SQLiteCommand.cs:568 
     at iDispatch.DevVehicle.Insert() [0x0003f] in 
    /Users/Projects/iDispatch/iDispatch/DevVehicleDAL.cs:240 

>>

此之後通常是一個內部堆棧跟蹤：

<< 

    Stacktrace: 

     at (wrapper managed-to-native) Mono.Data.Sqlite.UnsafeNativeMethods.sqlite3_prepare (intptr,intptr,int,intptr&,intptr&) <IL 0x0002a, 0xffffffff> 
     at Mono.Data.Sqlite.SQLite3.Prepare (Mono.Data.Sqlite.SqliteConnection,string,Mono.Data.Sqlite.SqliteStatement,uint,string&) [0x00044] in 
    /Developer/MonoTouch/Source/mono/mcs/class/Mono.Data.Sqlite/Mono.Data.Sqlite_2.0/SQLite3.cs:258 
     at Mono.Data.Sqlite.SqliteCommand.BuildNextCommand() [0x00019] in /Developer/MonoTouch/Source/mono/mcs/class/Mono.Data.Sqlite/Mono.Data.Sqlite_2.0/SQLiteCommand.cs:230 
     at Mono.Data.Sqlite.SqliteCommand.GetStatement (int) [0x0000b] in /Developer/MonoTouch/Source/mono/mcs/class/Mono.Data.Sqlite/Mono.Data.Sqlite_2.0/SQLiteCommand.cs:264 
     at (wrapper remoting-invoke-with-check) Mono.Data.Sqlite.SqliteCommand.GetStatement (int) <IL 0x00039, 0xffffffff> 
     at Mono.Data.Sqlite.SqliteDataReader.NextResult() [0x000cc] in 
    /Developer/MonoTouch/Source/mono/mcs/class/Mono.Data.Sqlite/Mono.Data.Sqlite_2.0/SQLiteDataReader.cs:891 
     at Mono.Data.Sqlite.SqliteDataReader..ctor 
    (Mono.Data.Sqlite.SqliteCommand,System.Data.CommandBehavior) [0x00051] in /Developer/MonoTouch/Source/mono/mcs/class/Mono.Data.Sqlite/Mono.Data.Sqlite_2.0/SQLiteDataReader.cs:89 
     at (wrapper remoting-invoke-with-check) Mono.Data.Sqlite.SqliteDataReader..ctor (Mono.Data.Sqlite.SqliteCommand,System.Data.CommandBehavior) <IL 0x00021, 0xffffffff> 
     at Mono.Data.Sqlite.SqliteCommand.ExecuteReader (System.Data.CommandBehavior) 
    [0x00006] in /Developer/MonoTouch/Source/mono/mcs/class/Mono.Data.Sqlite/Mono.Data.Sqlite_2.0/SQLiteCommand.cs:539 
     at Mono.Data.Sqlite.SqliteCommand.ExecuteNonQuery() [0x00000] in /Developer/MonoTouch/Source/mono/mcs/class/Mono.Data.Sqlite/Mono.Data.Sqlite_2.0/SQLiteCommand.cs:568 
     at iDispatch.DevVehicle.Insert() [0x0003f] in /Users/Projects/iDispatch/iDispatch/DevVehicleDAL.cs:240 
     at iDispatch.ThreadSQL.DoWorkSQL() [0x0038a] in /Users/Projects/iDispatch/iDispatch/ThreadSQL.cs:140 
     at System.Threading.Thread.StartUnsafe() [0x00016] in /Developer/MonoTouch/Source/mono/mcs/class/corlib/System.Threading/Thread.cs:684 
     at (wrapper runtime-invoke) object.runtime_invoke_void__this__ (object,intptr,intptr,intptr) <IL 0x0004e, 0xffffffff> 

Native stacktrace: 

    0 iDispatch       0x000d0db5 mono_handle_native_sigsegv + 343 
    1 iDispatch       0x0000f80c mono_sigsegv_signal_handler + 322 
    2 libSystem.B.dylib     0x9833705b _sigtramp + 43 
    3 ???         0xffffffff 0x0 + 4294967295 
    4 libsqlite3.dylib     0x03645dc1 sqlite3DbStrNDup + 33 
    5 libsqlite3.dylib     0x03645e07 sqlite3NameFromToken + 23 
    6 libsqlite3.dylib     0x036486dc sqlite3IdListAppend + 92 
    7 libsqlite3.dylib     0x03682720 sqlite3Parser + 11904 
    8 libsqlite3.dylib     0x03684536 sqlite3RunParser + 310 
    9 libsqlite3.dylib     0x03684b34 sqlite3Prepare + 276 
    10 libsqlite3.dylib     0x03684fa7 sqlite3LockAndPrepare + 151 
    11 ???         0x10c309ff 0x0 + 281217535 
    12 ???         0x10c2fd1c 0x0 + 281214236 
    13 ???         0x10c2f857 0x0 + 281213015 
    14 ???         0x10c2f58a 0x0 + 281212298 
    15 ???         0x10c2f50a 0x0 + 281212170 
    16 ???         0x10c2eeea 0x0 + 281210602 
    17 ???         0x10c2ea3c 0x0 + 281209404 
    18 ???         0x10c2e8d6 0x0 + 281209046 
    19 ???         0x10c2cc9e 0x0 + 281201822 
    20 ???         0x10c2cb30 0x0 + 281201456 
    21 ???         0x10fde444 0x0 + 285074500 
    22 ???         0x10bb6786 0x0 + 280717190 
    23 ???         0x106f2cba 0x0 + 275721402 
    24 ???         0x077cfbf0 0x0 + 125631472 
    25 iDispatch       0x0000f5c7 mono_jit_runtime_invoke + 1332 
    26 iDispatch       0x001ed281 mono_runtime_invoke + 137 
    27 iDispatch       0x001ee8d1 mono_runtime_delegate_invoke + 111 
    28 iDispatch       0x00229c74 start_wrapper_internal + 692 
    29 iDispatch       0x00229cc2 start_wrapper + 17 
    30 iDispatch       0x00266b99 thread_start_routine + 191 
    31 iDispatch       0x002974f1 GC_start_routine + 107 
    32 libSystem.B.dylib     0x982fe259 _pthread_start + 345 
    33 libSystem.B.dylib     0x982fe0de thread_start + 34 
* Assertion at ../../../../mono/mini/mini-exceptions.c:2188, condition `res != -1' not met 
>>

供參考：iDispatch是我的程序的名稱。

現在，儘管我使用多種方法將其插入到多個表中，但問題隨機出現在任何和所有方法中。通常情況下，插入方法如下所示：

<< 

    public void BulkInsert(StandardEquipmentCollection sec) 
    { 
     try 
     { 
      Connection.Open(); 

      SQLiteCommand cmd = Connection.CreateCommand(); 
      cmd.CommandType = CommandType.Text; 
      cmd.CommandText = 
       "INSERT INTO StandardEquipment (" + "Category, Description, VehicleID" + 
       ") VALUES (" + "@Category, @Description, @VehicleID)"; 
      foreach (StandardEquipment se in sec) 
      { 
       cmd.Parameters.AddWithValue("@Category", se.Category); 
       cmd.Parameters.AddWithValue("@Description", se.Description); 
       cmd.Parameters.AddWithValue("@VehicleID", se.VehicleID); 
       cmd.ExecuteNonQuery(); 
      } 

      Connection.Close(); 
     } 
     catch (Exception ex) 
     { 
      threadSQL.AddOutQ("Error: StandardEquipment BulkInsert - " + ex); 
     } 
    } 

>>

問題出現在插入了100個記錄，有時候是1000個記錄。

那些使插入到表中看起來很好（我使用Navicat Lite），它的錯誤也很好看（即從調試器我可以看到所有的數據是正確的，就像格式）。

我已經在Windows（ADO.NET爲 SQLite的2.0數據提供程序），單聲道運行的Windows完全相同的代碼，和Mono在MacBook Pro上運行...只 MonoTouch的（版本2.4.2;發行ID：20402005; Git修訂版： b7eeb779e1134c204f22d9fd5b6ebec4d758f60d; Build date：2011-04-22 22：48：43 + 0000）我看到這個錯誤。

任何幫助將不勝感激！

BTW：爲解決網上搜索後，我增加了以下「雜誌堅持」命令，但它沒有任何效果：

<< 
SqliteConnectionStringBuilder connectionStringBuilder = new SqliteConnectionStringBuilder(); 
connectionStringBuilder.JournalMode = SQLiteJournalModeEnum.Persist; 
connectionStringBuilder.DataSource = dbPath; 
SqliteConnection Connection = new SqliteConnection(connectionStringBuilder.ConnectionString); 
>>

謝謝！

來源

2011-08-24 Bob

在到達foreach循環之前，可以嘗試將參數添加到命令對象的Parameters集合中，然後在循環內分配參數的值。例如。 'command.Parameters.Add（「@ ID」，SqlDbType.Int）;'在循環外部;然後在循環中：'command.Parameters [「@ ID」]。Value = customerID;'http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqlparametercollection.addwithvalue.aspx – Tim

在foreach子句中，你應該在添加新的參數之前清除參數。我認爲你達到了參數數量的極限 –

從您的描述看，這看起來像內存不足的情況。請記住，與桌面計算機相比，iOS設備的內存不多。您可能會耗盡內存太快，並在非託管代碼中崩潰。例如下面的線將只命中了一個SEGSIGV（從本地代碼）時沒有附加調試器：

* Assertion at ../../../../mono/mini/mini-exceptions.c:2188, condition `res != -1' not met

要解決這個問題嘗試配置您的對象（所有實現IDisposable的那些），或者使用或致電處置和/或儘可能回收它們。

看看 How can I recycle my SqliteCommand to speed up this Sqlite bulk insert (iOS)?以後。

來源

2011-08-24 17:28:40 poupou

謝謝！我查看並使用了鏈接代碼中的想法（回收SqliteCommand）並解決了問題： – Bob

我很高興它爲您工作:-)。您可以接受答案，以便將其標記爲（對於搜索類似問題的任何人）。你也是同樣的'鮑勃'，填補http://bugzilla.xamarin.com/show_bug.cgi?id=339？如果是這樣，我會將其標記爲固定（並添加一個鏈接到這個問題）。 – poupou

MonoTouch的SQLite的插入錯誤 - 無法打開數據庫文件

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