Question

I have the following (simplified) code:

IDbConnection connection = new SQLiteConnection(GetConnectionString());
if (connection.State == ConnectionState.Closed)
  connection.Open();
using (IDbTransaction transaction = connection.BeginTransaction())
{
  using (IDbCommand cmd = transaction.Connection.CreateCommand())
  {
    cmd.CommandText = "DELETE FROM Records2 WHERE ClientIndex = @ClientIndex";
    AddParameter(cmd, "@ClientIndex", DbType.Int32, clientIndex);
    cmd.ExecuteNonQuery();
  }
  using (IDbCommand cmd = transaction.Connection.CreateCommand())
  {
    cmd.CommandText = "INSERT INTO Records2(ClientIndex, CandidateIndex, Name)";
    cmd.CommandText += " VALUES(@ClientIndex, @CandidateIndex, @Name)";
    AddParameter(cmd, "@ClientIndex", DbType.Int32, clientIndex);
    IDbDataParameter pIndex = AddParameter(cmd, "@CandidateIndex", DbType.Int32, null);
    IDbDataParameter pName = AddParameter(cmd, "@Name", DbType.AnsiString, null);
    int index = 0;
    foreach (Record record in records)
    {
      pIndex.Value = index++;
      pName.Value = record.Name;
      cmd.ExecuteNonQuery();
    }
  }
  using (IDbCommand cmd = transaction.Connection.CreateCommand())
  {
    cmd.CommandText = "UPDATE Records SET Status = @Status, UpdateDate = @UpdateDate WHERE ClientIndex = @ClientIndex";
    AddParameter(cmd, "@ClientIndex", DbType.Int32, clientIndex);
    AddParameter(cmd, "@Status", DbType.Byte, status);
    AddParameter(cmd, "@UpdateDate", DbType.DateTime, DateTime.Now);
    cmd.ExecuteNonQuery();
  }
  transaction.Commit();
}
connection.Close();

with:

private IDbDataParameter AddParameter(IDbCommand command, string paramName, DbType type, object value)
{
  IDbDataParameter parameter = command.CreateParameter();
  parameter.ParameterName = paramName;
  parameter.DbType = type;
  if (value != null)
    parameter.Value = value;
  else
    parameter.Value = DBNull.Value;
  command.Parameters.Add(parameter);
  return parameter;
}

All the ExecuteNonQueries work without problems, except for the last one. On my machine (running xp) I get the following exception, but on other machines (running windows 7) it works without problems, with the same code and the same database file.

SQLiteException (0x80004005): Unable to open the database file
  System.Data.SQLite.SQLite3.Reset(SQLiteStatement stmt) +375
  System.Data.SQLite.SQLite3.Step(SQLiteStatement stmt) +199
  System.Data.SQLite.SQLiteDataReader.NextResult() +226
  System.Data.SQLite.SQLiteDataReader..ctor(SQLiteCommand cmd, CommandBehavior behave) +87
  System.Data.SQLite.SQLiteCommand.ExecuteReader(CommandBehavior behavior) +38
  System.Data.SQLite.SQLiteCommand.ExecuteNonQuery() +39

I tried using JournalMode = Perist in the connection string and i excluded the directory containing the database file from my anti-virus, but nothing helps.

I’m using the 3.5 Framework and my version of System.Data.SQLite is 1.0.66.0.

Any Ideas ?

Thanks in advance,

Marc

Answer 1

I upgraded my System.Data.SQLite.dll from version 1.0.66.0 written by Robert Simpson (http://sqlite.phxsoftware.com) to version 1.0.74.0 written by the SQLite development team (http://system.data.sqlite.org) and that seems to solve the problem.