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Saving Form's data only if is "Dirty"

Posted on 2009-04-14
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Last Modified: 2013-12-26
Hi everyone,

In a VB.NET 2005 - WINDOWS application:

I have an application with about 50 forms that needs to be refractored in a way that the user does not have to press the "Save" button every time he makes a change... instead, the form on the close event should know that the form is "Dirty" and commit the changes.

There is no binding to a dataset (as it should) otherwise will be easy  to do the trick.

I do not want to update the records firing the click-event of the the save button if there are no changes because it makes difficult to track who made actual changes on the database and will create un-necessary network traffic.

How can I accomplish this?

I'm thinking of adding an event handler for each of the fields for the event changed and modify a flag "Dirty"
is this the way to do it?

Any ideas are welcome,

Regards

Jorge
       

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Question by:George
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djon2003 earned 500 total points
ID: 24140056
What I would do is :
-Marking all the controls needing dirtying with his Tag property to "DIRTYING".
-Add each form a variable called IsDirty and set it to false.
-Create a sub which loops through all the form controls (and also recursively looking to control subcontrols) and if the Tag property = "DIRTYING" then you do AddHandler depending on the type of control (ie. Checkbox would be Addhandler curControl.Checked, AddressOf ControlChecked ..... or a TextBox woul be Addhandler curControl.TextChanged, AddressOf ControlTextChanged ) The method called by the AddressOf set the IsDirty variable to True.
-When you first load your data, the IsDirty will be to True, so reset it to False. (After loading)
-Then, looking at this variable will tell you if the user has done any changes in the control demanded. If so, you can do what ever action needed.
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Author Closing Comment

by:George
ID: 31569935
I think this could do the trick.
Thank you very much!
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