Cellvalidating event vb net

09-May-2015 22:39 by 5 Comments

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Unforunately it does not seem to work when i try to add a new row to the grid, enter a value and try to leave the cell.

In a lot of books and articles that I've read on this control, it seems to suggest that the appropriate event to handle for this is the Cell Validating one. However, this event triggers a bit too often for my tastes and I'm not sure it is required.In Visual basic i'm trying to make a field required by preventing the user to leave the active cell if it's empty. The first one is the ID which is automaticly filled in on adding a new row, the second one is the name. On form load there are 4 items loaded into the grid. Handle the Cell Validated event to perform post validation processing.Canceling this event cancels the changes to the current cell.The event handler receives an argument of type Cell Validating Event Args containing data related to this event.

The following Cell Validating Event Args properties provide information specific to this event.For example, this event triggers everytimes the users switches to another row.On the other hand, the Cell Value Changed event seems to trigger only when the value of the cell changes, which means the validation code runs only when the value changes and not everytime a user changes cells.Yeah, I agree with that if it is for validation only.However, for conditional formatting code, I don't see much other way for it to remain in Data Grid View's related-code (or in a class derived from Data Grid View to abstract it).Now, since so many books use the Cell Validating event, I wonder if there is not any gotcha (in display for example) with using the Cell Value Changed?