Datagridview call cellvalidating
The behaviour you are seeing is actually due to a painting issue and not due to the error icon not being shown.
What is happening is that when you set the cell's error text the icon is displayed but the text box of the cell in edit mode is painted over the icon, hence no icon shown to the user!
Error Text = "Zero is not a valid track" songs Data Grid View.
Error Text = _ "Zero is not a valid track" Return False Else If Not Integer.
Error Text = "Please enter a track" songs Data Grid View.
This example is part of a larger example available in Walkthrough: Validating Data in the Windows Forms Data Grid View Control.
Error Text = _ "Invalid format" Return False End Try End If Return True End Function This event is analogous to the Control. Use this event to perform validation on all the values of a row.
column, its value is tested for validity by checking that it is not empty.
Row Validating Dim row As Data Grid View Row = _ songs Data Grid View. Row Index) Dim track Cell As Data Grid View Cell = _ row.
Cancel = Not (Is Track Good(track Cell) _ And Also Is Date Good(date Cell)) End Sub Private Function Is Track Good(By Ref cell As Data Grid View Cell) As Boolean If cell.