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At this moment, a Cell Validating event is fired and since the new value is not committed yet to the underlying data object, here is the perfect place for applying a custom UI validation. The Row Validating event is very similar to the Cell Validating event. Once you have added such errors, you will have to explicitly clear them when needed.Thanks, I'm using Cell Value Changed currently on a grid with custom validation and have had no problems with display or anything else.I used this event because I wanted to fire off a certain order of events, but only when the user changes the value of a cell.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.It may be set to one of the following values: In R2 2016, Telerik introduced the Validation Type property of Rad Grid View. This results in a binding validation error (Figure 3) and the Grid View Bound Column Base editor will enter into an invalid state.It provides you with the possibility to choose what type of validation to apply for each instance of Rad Grid View. In the previous examples, the data was validated per cell, using the Cell Validating event or property validation.Private Sub rad Grid View_Cell Validating(By Val sender As Object, By Val e As Telerik. Attach to the Row Validating event, which is exposed by the Rad Grid View. Grid View Row Validating Event Args) Dim order As Order = Try Cast(e. You can also download runnable projects from our online SDK repository here; the examples are listed under Grid View.Private Sub rad Grid View_Row Validating(By Val sender As Object, By Val e As Telerik. Although Git Hub is a very well-known platform, we saw a better and easier approach for reviewing our examples in our SDK Samples Browser.I have not noticed much in the way of a performance hit (tested with 100 - 5000 rows).I think in the end it depends on what your validation needs are.