How to Prevent rounding numbers in DataGridView using VB.Net

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I have a datagridview in a windows forms vb.net application. My goal is to have any number over 0.999999999999 12 significant digits to be rounded down to 0.99999999999 11 significant digits. I want to prevent vb.net from rounding these values up to 1. This is how I'm implementing this but I can't figure out which DataGridView Event handler to use.

VB

If DataGridView1.Rows(e.RowIndex).Cells(e.ColumnIndex).Value <= 0.999999999999 Then
                DataGridView1.Rows(e.RowIndex).Cells(e.ColumnIndex).Value = 0.99999999999
            End If

Posted 29-Apr-14 7:54am

CAS1224

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Sergey Alexandrovich Kryukov 29-Apr-14 18:37pm

This piece of code looks like such an abuse! :-)
—SA

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phil.o · Accepted Answer · 2014-04-29T08:13:00

You could add an handler to your DataGridView.CellFormatting event; this way you can customize the formatted value (the way the DataGridView will present the data for a specific cell).

It may give something like:

VB

Private Sub DataGridView1_CellFormatting(sender As Object, e As DataGridViewCellFormattingEventArgs) Handles DataGridView1.CellFormatting
   If (e.ColumnIndex = 4) Then '' Here I assume that your column is the fifth
      If (e.Value Is Not Nothing) Then
         Dim stringValue As String = e.Value.ToString("0.00000000000")
         e.Value = stringValue
         e.FormattingApplied = True
      End If
   End If
End Sub

Hope this helps. I apologize in advance for any mistake I could have done with VB, as I gave up this language about ten years ago.