Which exception does SMO Transfer Raise?

Question

While using this code

try
{
    transfer.TransferData();
}
catch (SmoException smoex)
{
    //Do something
}
catch (Exception ex)
{
    //Do something else
}

The exception is always caught by the second catch statement. Does someone know why this happens?

Thanks in Advance

Answer 1

Use this to determine what the exception you get actually is:

try
{
   transfer.TransferData();
}
catch (Exception ex)
{
    var theRealExceptionTypeName = ex.GetType().Name;
}

Answer 2

This happens because the exception is not an SmoException .

It is either an Exception or another exception type deriving from Exception , but not SmoException . SmoException would be caught by the first handler if it were truely an SmoException or a class deriving from SmoException . Hopefully that sentence isn't as confusing to read as it was to type!

Further reading on exceptions and exception handling:

http://msdn.microsoft.com/en-us/library/ms173160(v=vs.80).aspx

Documentation doesn't say what exceptions are thrown:

http://msdn.microsoft.com/en-us/library/microsoft.sqlserver.management.smo.transfer.transferdata.aspx