C datagridview cellvalidating example
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.I have not noticed much in the way of a performance hit (tested with 100 - 5000 rows).The cell is then waiting for a correct value and won't let the user to simply cancel&revert his action...Here is what the validation method looks like : to get what you want.How can I disable the cell validating event for the rows that was added before???What's the best place to implement validation logic code and conditional formatting code for a Data Grid View?Private Sub data Grid View1_Cell Validating(By Val sender As Object, _ By Val e As Data Grid View Cell Validating Event Args) _ Handles data Grid View1. Header Text ' Abort validation if cell is not in the Company Name column. Equals("Company Name") Then Return ' Confirm that the cell is not empty. Cell Validating Dim header Text As String = _ data Grid View1.
Error Text property in case it was previously set by a Cell Validating event handler.
In any case, note that it is better to make sure that the cancellation happens only under the expected conditions; otherwise, the code might get stuck in this event because it is automatically called at many different points.
event, value calculates when I leave the next cell.
the event is triggered when the Form with the Data Grid View is initialized, when the column headers texts are placed.
So the function handling the event runs at start-up as many time as there are columns.