private void InitializeDatabase()
{
string connectionString = ConnectionString;
Debug.AssertStringNotEmpty(connectionString);
string dbFilePath = ConnectionStringHelper.GetDataSourceFilePath(connectionString);
if (File.Exists(dbFilePath))
{
return;
}
using (SqlCeEngine engine = new SqlCeEngine(ConnectionString))
{
engine.CreateDatabase();
}
using (SqlCeConnection conn = new SqlCeConnection(ConnectionString))
{
using (SqlCeCommand cmd = new SqlCeCommand())
{
conn.Open();
SqlCeTransaction transaction = conn.BeginTransaction();
try
{
cmd.Connection = conn;
cmd.Transaction = transaction;
cmd.CommandText = @"
SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_NAME = N'ELMAH_Error'";
object obj = cmd.ExecuteScalar();
if (obj == null)
{
cmd.CommandText = @"
CREATE TABLE ELMAH_Error (
[ErrorId] UNIQUEIDENTIFIER NOT NULL PRIMARY KEY DEFAULT newid(),
[Application] NVARCHAR(60) NOT NULL,
[Host] NVARCHAR(50) NOT NULL,
[Type] NVARCHAR(100) NOT NULL,
[Source] NVARCHAR(60) NOT NULL,
[Message] NVARCHAR(500) NOT NULL,
[User] NVARCHAR(50) NOT NULL,
[StatusCode] INT NOT NULL,
[TimeUtc] DATETIME NOT NULL,
[Sequence] INT IDENTITY (1, 1) NOT NULL,
[AllXml] NTEXT NOT NULL
)";
cmd.ExecuteNonQuery();
cmd.CommandText = @"
CREATE NONCLUSTERED INDEX [IX_Error_App_Time_Seq] ON [ELMAH_Error]
(
[Application] ASC,
[TimeUtc] DESC,
[Sequence] DESC
)";
cmd.ExecuteNonQuery();
}
transaction.Commit(CommitMode.Immediate);
}
catch (SqlCeException)
{
transaction.Rollback();
throw;
}
}
}
}
private void InitializeDatabase()
{
string connectionString = ConnectionString;
Debug.AssertStringNotEmpty(connectionString);
string dbFilePath = ConnectionStringHelper.GetDataSourceFilePath(connectionString);
if (File.Exists(dbFilePath))
{
return;
}
//
// Make sure that we don't have multiple instances trying to create the database.
//
lock (_mdbInitializationLock)
{
//
// Just double-check that no other thread has created the database while
// we were waiting for the lock.
//
if (File.Exists(dbFilePath))
{
return;
}
//
// Create a temporary copy of the mkmdb.vbs script.
// We do this in the same directory as the resulting database for security permission purposes.
//
string scriptPath = Path.Combine(Path.GetDirectoryName(dbFilePath), _scriptResourceName);
using (FileStream scriptStream = new FileStream(scriptPath, FileMode.Create, FileAccess.Write, FileShare.None))
{
ManifestResourceHelper.WriteResourceToStream(scriptStream, _scriptResourceName);
}
//
// Run the script file to create the database using batch
// mode (//B), which suppresses script errors and prompts
// from displaying.
//
ProcessStartInfo psi = new ProcessStartInfo(
"cscript", scriptPath + " \"" + dbFilePath + "\" //B //NoLogo");
psi.UseShellExecute = false; // i.e. CreateProcess
psi.CreateNoWindow = true; // Stay lean, stay mean
try
{
using (Process process = Process.Start(psi))
{
//
// A few seconds should be plenty of time to create the database.
//
TimeSpan tolerance = TimeSpan.FromSeconds(2);
if (!process.WaitForExit((int)tolerance.TotalMilliseconds))
{
//
// but it wasn't, so clean up and throw an exception!
// Realistically, I don't expect to ever get here!
//
process.Kill();
throw new Exception(string.Format(
"The Microsoft Access database creation script took longer than the allocated time of {0} seconds to execute. "
+ "The script was terminated prematurely.",
tolerance.TotalSeconds));
}
if (process.ExitCode != 0)
{
throw new Exception(string.Format(
"The Microsoft Access database creation script failed with exit code {0}.",
process.ExitCode));
}
}
}
finally
{
//
// Clean up after ourselves!!
//
File.Delete(scriptPath);
}
}
}
