In VBScript, think of it as a switch.
"On Error Resume Next" - switches error handling off. If something fails once set, it will just keep going.
With it switched off, error codes will still be captured. You can check the value of "Err.Number" - the code should indicate the naurture of the error, but you need to handle it with your own code when running this way. (List of error codes: http://ss64.com/vb/syntax-errors.html )
"On Error Goto 0" - switches it back on.
If you switch error handling off, you need to make sure your code is robust and/or you include your own error handling. If you just let it plough merrily on no matter what, without doing any sort of validation or error handling yourself, you can produce some very stange results ....
Thank you for the explaination about On Error...
If i have the situation like below.
Function ()
Code Line 1
Code Line 2
Code Line 3
Code Line 4
Code Line 5
Code Line 6
End Function
I am expecting run time errors in all lines. Do I need to write On Error before each line ?
No.
But I have no idea what you're trying to do.
Changing it to:
Function () On Error Resume Next Code Line 1 Code Line 2 Code Line 3 Code Line 4 Code Line 5 Code Line 6 On Error Goto 0 End Function
Will cause it to run over all those lines and keep going - regardless of any errors.
But I'm not sure what good this is doing you? Why are you expecting errors? If you are expecting them, what are you trying to do with them. If you want to handle them in any sort of meaningful way, you'll need to do a lot more than this!
If every line from 1 to 6 all caused an error, the error number will be updated each time a new error happens. So at the end of the six lines, all you will have is the error code for the last one and a load of code that doesn't work, but keeps going.
All it seems like you're doing is forcing it to keep working over bad code. I have no idea why ....
All I am expecting is , Is there anything for "Run time errors" to trigger automatically like On Log Error Event
