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How to identify changed fields

Steve Dambrosio
Greenhorn

Joined: Apr 02, 2009
Posts: 28
Does anyone have a good method for identifying changed input fields on a form? This is especially important when you are displaying a large collection. For example, suppose I've listed 100 lines on a form and the user changes one field on one line. How can I identify which field changed or at least which line it was on? I would want to do one database update in this case. Thanks!
 
It is sorta covered in the JavaRanch Style Guide.
 
subject: How to identify changed fields