// <fxcop ignore="MethodsInTypesWithIntPtrFieldAndFinalizeMethodRequireGCKeepAlive"/>
private void Dispose(bool disposing)
{
if (disposing) // release mananged objects
{
DisposeManaged();
RollbackInternal(false);
}
// release unmanaged objects
this.localTransaction = null;
if (IntPtr.Zero != this.iunknown)
{
// create a new UnsafeNativeMethods.ITransactionLocal from IntPtr
// to avoid using existing managed wrapper on the com object
try {
object local = Marshal.GetObjectForIUnknown(this.iunknown);
UnsafeNativeMethods.ITransactionLocal transaction = (UnsafeNativeMethods.ITransactionLocal)local;
transaction.Abort(0, 0, 0);
Marshal.Release(this.iunknown);
}
catch (Exception) {
}
this.iunknown = IntPtr.Zero;
}
}
private int RollbackInternal(bool exceptionHandling)
{
int hr = 0;
if (null != this.localTransaction)
{
Marshal.Release(this.iunknown);
this.iunknown = IntPtr.Zero;
// there is no recovery if Rollback throws an exception
UnsafeNativeMethods.ITransactionLocal local = this.localTransaction;
this.localTransaction = null;
if (null != this.weakTransaction)
{
OleDbTransaction transaction = (OleDbTransaction)this.weakTransaction.Target;
if ((null != transaction) && this.weakTransaction.IsAlive)
{
hr = transaction.RollbackInternal(exceptionHandling);
GC.KeepAlive(transaction);
GC.SuppressFinalize(transaction);
if (hr < 0)
{
SafeNativeMethods.ClearErrorInfo();
return(hr);
}
}
this.weakTransaction = null;
}
#if DEBUG
if (AdapterSwitches.OleDbTrace.TraceInfo)
{
ODB.Trace_Begin("ITransactionLocal", "Abort");
}
#endif
hr = local.Abort(0, 0, 0);
#if DEBUG
if (AdapterSwitches.OleDbTrace.TraceInfo)
{
ODB.Trace_End("ITransactionLocal", "Abort", hr);
}
#endif
if (hr < 0)
{
if (exceptionHandling)
{
ProcessResults(hr);
}
else
{
SafeNativeMethods.ClearErrorInfo();
}
}
}
return(hr);
}