Value = 0 Then 'This is the 0 Load row If cbo Tare. Value = str Cell Value End If Process Message: Catch ex As Exception EH. If you want to format the cell then, not surprisingly, you handle the Cell Formatting event. If you want to do something other than that then you do it elsewhere and if you're not doing that then you don't handle Cell Validating at all.
It’s important to note that this event will get called twice, once on changing the state of the cell to dirty (before committing changes) and once when changing the cell state back to ‘clean’ (after the changes have been committed).
For this reason, before preforming any action, it checks to see when the current cell is dirty or not. The form loads by default to only handle the Cell Value Changed event itself, which means we will immediately notice the problem at hand.
This helps identify when, and in what order, events are being handled without explicitly having to set breakpoints and wait for the code to catch each event.
In the options group box, you can choose to include event handlers notifications or not.
When you click a Check Box in a Data Grid View Check Box Column, the check marker will update immediately, but Cell Value Changed event on the Data Grid View will not fire until the user happens to click elsewhere and the cell has lost focus. Well, the Data Grid View thinks it’s a little preemptive to go declaring that the cell value has changed while you are still selected on it.
This makes more sense when we think about a Text Box column.
I’d rather code to do exactly what it says it’s doing. This has the added bonus of not firing when you have clicked outside of the checkbox area, but still falls perhaps under the same category of not being entirely clear to someone unfamiliar with this issue why this particular event should force the grid to exit edit mode.
After looking into the problem at some length, MSDN actually seems to offer the best solution right on their Cell Content Click event page. I like that it tells us very specifically what has happened to the grid at the point in time when the event is raised and handled.
If what you actually want to do is truncate the data to four decimal places then that is something that you would do in the Cell Validated event handler.