Vb net datagrid cellvalidating
If the event handler for the Cell Validating event finds that the value is an empty string, the Data Grid View prevents the user from exiting the cell until a non-empty string is entered.For a complete explanation of this code example, see Walkthrough: Validating Data in the Windows Forms Data Grid View Control. Value = 3 'This will set the defaultvalue of the datagrid cell in question to the value of "3" Exit Sub End If Next End If This solution not only checks for non-integer values it also works for every column populated with numbers for the entire datagridview. Column Index = 3) Then 'checking numeric value for column 3 only If Not Isnumeric(e. Column Index = 2 Then '' this is the col index for qty to be transfered If .
I understand that the impact in performance should be irrelevant when using simple validation and conditional highlighting rules but I would as much prefer it not to run useless code everytime the user moves to another cell if it can be avoided.
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).
On form load there are 4 items loaded into the grid.
When the form is loaded the first cell that is selected passes the check with no problem. Ivan.f Private Sub Validate Cell Value(sender As Object, e As Data Grid View Cell Validating Event Args) Handles grd Result.