I need to enforce cell validations on the datagridview cells so that it does not accept negative values.
I found a suitable code for it from the msdn library.
I come from a language where you had 1 event for this kind of thing and here we have 8, so, that's granular, maybe too granular for my simple app but I needed to know which event to code for and now I have an understanding of the vents so I can now decide what to do (PS, it's gonna be On Cell Validating).
Net 2005, Unbound Data Grid Viewer with 2 (two) columns ("Check Num" Index 0; "Clear Date" Index 1). I tried MS's Help pages and oh, those are useful (heavy sarcasm).
This is useful because the gui drag and drop capability using the toolbox doesn’t create event triggers, and there is no way to add them based web searches that led me to https://msdn.microsoft.com/en-us/library/system.windows.forms.datagridview.
I really like the convenience of drag and drop gui tools, but there are advantages to code: 1) you can see it and know what is going on.
It generates an error message when i type in the name of the item.
The rest of the cell validations are perfectly working!
So the question might be: The application requires that a certain value, for instance, 10, needs to be entered into a cell, if the condition is not met, then the user must receive feedback, perhaps an electric shock through an appropriate USB device and an error message. (Ok, you wouldn’t use an electric shock, maybe a strobe light?
Private Sub dg Checks_Cell Validating(By Val sender As Object, By Val e As System. Cell Validating Dim Val Date As Date = Nothing Dim Val Long As Long = 0 If dg Checks.
Data Grid View Cell Validating Event Args) Handles dg Checks.
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.
Error Text = "" Dim new Integer As Integer ' Don't try to validate the 'new row' until finished ' editing since there ' is not any point in validating its initial value.
Search for msdn datagridviewcellvalidatingeventargs:
Cell Validating event lets you cancel changes to the current cell when the new value is not valid.