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Untrappable error

Ant
Hi,

I have an error when trying to set a list box datasource to the same dataset
twice. I understand why the error is occuring. What I don't understand is
why, when enclosing this in a try block, that the exception is not handled to
the catch block. A hint, the exception is outlined in green, not yellow.
Below is the exception message:

.........
An unhandled exception of type 'System.Data.ConstraintException' occurred in
system.data.dll

Additional information: Column 'CustomerID' is constrained to be unique.
Value 'ANEWR' is already present.
.........

Why can't this type of exception not be able to be handled by a try catch
block?

Thanks for any ideas in advance
Ant
Feb 10 '06 #1
0 1071

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