Datagridview call cellvalidating

At run time, if the validation fails, the Data Grid View displays a red exclamation icon in that cell (see below).Hovering the mouse pointer on the icon displays the Error Text that you set earlier.

datagridview call cellvalidating-61

Is In Edit Mode Then Dim c As Control = Data Grid View1.

The Cell Validating/Cell Validated events are always fired when you change the current cell in the grid no matter if the grid is in edit mode or not. I would recommend you to clear the Error Text in the entry point of the Cell Validating event and depending on the input, adjust the Error Text. If you have any additional questions, please let me know. Anwxmku Sjy2nhd4WOAS0Op P-m69wkw (I couldn't attach the file due to the 2MB file size limit)Hi Jared, Thank you for writing. The Cell Validating event is suitable for performing a check for the cell`s value and one should not call the Rad Grid View1.

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.

Cancel Edit() it causes the Cell Validated event to fire when it shouldn't. GIF screen recording describing this behavior with your example project: https://1drv.ms/i/s!

To perform any custom validation on the cell or row being edited, you can use the Cell Validating and Row Validation events, respectively.

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.

Any solution is going to involve using an event that definitely will fire to stop the Data Grid View from thinking it’s in edit mode.

This problem was also raised in a Stack Overflow Question which seemed to advocate for handling the method, thereby ensuring that the grid would evaluate whether or not the Cell’s value had, indeed, changed and fire the corresponding event appropriately I must admit, this works, but feels like more of a work around than a solution.

It turns out that this is trickier than it might seem and doesn’t work great out of the box from .

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