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I want to prevent duplicate file names in a document library.

Let me know how can I enforce the unique names in the library.

Thanks RH

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up vote 0 down vote accepted

Create an event receiver for the library on the ItemAdding, check if an item with that name already exist => if this is true add this code :

properties.Cancel = true;
properties.ErrorMessage = "Adding duplicate is not alowed.";

or use this :

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Your answer is correct but I have a more complicated scenario – RHM Mar 2 '12 at 12:29

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