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Edited Entity should not commit changes only when Save button is pressed

Posted on 2010-08-17
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Last Modified: 2012-05-10
Hello,

I have a Mainform + smallDialog.

scenario:

The Mainform has a datagrid with entities bound.

The smallDialog updates the entity double-clicked-on-the-datagrid-in-Mainform wich is passed to the smallDialog and bound there again to a bindingsource.

When I change now some data in the textfiels AND leave the textfield so the focus is lost, the data is immediate updated in the datagrid of the Mainform.

What I want is to update ONLY when the OK-button is pressed.

How can I change that update-behaviour without cloning the entity and do many workarounds?
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Question by:MSFanboy
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Accepted Solution

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Fernando Soto earned 500 total points
ID: 33465085
Hi MSFanboy;

You can use the BindingSource.SuspendBinding to cause the updating of bound fields to not take place until you enable updates with BindingSource.ResumeBinding. Please take note from Microsoft documentation :

Using SuspendBinding and prevents changes from being pushed into the data source until ResumeBinding is called, but does not actually prevent any events from occurring. Controls that use complex data binding, such as the DataGridView control, update their values based on change events such as the ListChanged event, so calling SuspendBinding will not prevent them from receiving changes to the data source. For this reason, this SuspendBinding and ResumeBinding are designed for use with simple-bound controls, such as the TextBox control. Alternatively you can use these methods in a complex binding scenario if you suppress ListChanged events by setting the RaiseListChangedEvents property to false.

Fernando
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