DataGridview to Component

[Claudio111]

Hi All

I'm started to bulid a DataGridview Grouping project (that will be very hard !!) but i will procede step by step

1) first step is to pass a DGV to a component that will modify the DGV in same way

2) second step is go back to the calling form and show the original DGV wothout Modification

The following image is the original DGV




Then when I click on "Raggruppa" I pass the DGV to a Component that in this case just changes

all the value on a Column to "TT"



What I wish now is go back to original DGV if I click again on Raggruppa Command

I'm using the following code in the callin Form


#Region "RAGGRUPPA"

Private Sub CmdRaggruppa_Click(sender As Object, e As EventArgs) Handles CmdRaggruppa.Click

Select Case FlagRaggruppa
Case False
'active Grouping
Grouper = New DGVGrouper(DGV)

FlagRaggruppa = True

GroupingLabelStatus.Visible = True
Case True
' deactive grouping
FlagRaggruppa = False

Grouper.chiudi()
DGV.DataSource = Bs1
DGV.Refresh()
Case True
End Select
End Sub


#End Region



and this is the code for the component

Imports System.ComponentModel
Imports System.Windows.Forms

Partial Public Class DGVGrouper
Inherits Component
Private WithEvents RDGV As DataGridView

Public Sub New(ByRef Grid As DataGridView)

If Grid IsNot Nothing Then
RDGV = Grid
AddHandler RDGV.RowPrePaint, (AddressOf RDGV_RowPrePaint)
RDGV.Refresh()
End If
End Sub

Private Sub RDGV_RowPrePaint(sender As Object, e As DataGridViewRowPrePaintEventArgs) Handles RDGV.RowPrePaint
RDGV.Rows(e.RowIndex).Cells(3).Value = "TT"
End Sub

Public Sub chiudi()
RemoveHandler RDGV.RowPrePaint, (AddressOf RDGV_RowPrePaint)
End Sub
End Class


But in this way the DGV does not show the original values.

Where am I wrong ?

Thanks for help

Claudio

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