Search to run in DGV2 based on Text Typed in DGV1's Column

I have 2 DGV. In first DGV (DGV1), I am entering the Item Name in Column(1). (Based on Item Name other cells in this DGV1 will be populated and this part is running fine).
2^nd DGV (DGV2) is linked to Database containing Item Names, Item Groups. While working in DGV1 - columns1, I want to see and select the Item Names from this DGV2. (i.e. DGV2 is just an assistant DGV)
For this I made program to show DGV2 as soon as Cursor enters the Column1 of DGV1 (It will hide as soon as item is selected). And Now I want that values in DGV2 get filtered depending upon Text typed in DGV1.Column1 and additionally, if any time, the text entered in column1, results in DGV2 blanking (i.e. filtered result count = 0) then that particular last word must be cancelled (like e.handled = true).
My program captures the first Letter Typed in DGV and search command in DGV2 is running OK but when another letter is typed, it do not concatenate the word already typed in Cell with New Letter typed. Please help. (In debugging I noticed that DGVRow.Cells(1).Value is always nothing even after some keys are typed in)
I successfully done similar task using Textbox in place of DGV1, I used TextBox.textchanged event to capture the text typed in Textbox. But in case of DGV, as there is no direct Cell.textchanged event and hence I am facing challenge in capturing the Text being typed in DGV1.column1.
Code working when using Textbox is as under –

[Code]
Private Sub Textbox1_TextChanged(sender As Object, e As EventArgs) Handles Textbox1.TextChanged

DT.DefaultView.RowFilter = "sItemName LIKE '*" & Textbox1.Text.TriAttachment 185720m & "*' "

If DGV2.RowCount > 0 Then ‘ DT is datasource of DGV2

ElseIf DGV2.RowCount = 0 Then

Textbox1.Text = Textbox1.Text.Substring(0, Textbox1.Text.Length - 1)
Textbox1.Select(Textbox1.Text.Length, 0)

End If

End Sub
[Code\]

Code I tried with DGV is as under.

[Code]
Protected Overrides Function ProcessCmdKey(ByRef msg As Message, keyData As Keys) As Boolean

Dim Keycode As Integer = CType(keyData, Integer)
Dim MyKey As Keys = CType(Keycode, Keys)

If ActiveControl.GetType Is GetType(DataGridViewTextBoxEditingControl) OrElse ActiveControl Is DGV1 Then

Dim DGV As DataGridView = Nothing

If ActiveControl.GetType Is GetType(DataGridViewTextBoxEditingControl) Then

Dim DGVTEIC As DataGridViewTextBoxEditingControl = CType(ActiveControl, DataGridViewTextBoxEditingControl)

DGV = CType(DGVTEIC.EditingControlDataGridView, DataGridView)

Else

DGV = CType(ActiveControl, DataGridView)

End If

Dim DGC As DataGridViewTextBoxCell = DGV.CurrentCell

If IsNothing(DGC) Then Return MyBase.ProcessCmdKey(msg, keyData)

If AlphanumericKeys.IndexOf(Chr(keyData)) >= 0 Then

Dim DGVRow As DataGridViewRow = DGVItmDetail.Rows(nRow)

Dim searchstr As String = DGVRow.Cells(1).Value + MyKey.ToString

‘ Here SearchString must be a Combination of Text already in Cell and New Typed key BUT DGVRow.Cells(1).Value is always Nothing as per Debugging

DT.DefaultView.RowFilter = "ItmName LIKE '*" & searchstr & "*' "
If DGV2.RowCount > 0 Then

ElseIf DGV2.RowCount = 0 Then

searchstr = searchstr.Substring(0, searchstr.Length - 1)

DT.DefaultView.RowFilter = "ItmName LIKE '*" & searchstr & "*' "

Return True

End If

Return MyBase.ProcessCmdKey(msg, keyData)
End If

End If

End Function
[Code\]

Please format your code properly.

Quote:

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Originally Posted by jmcilhinney

Please format your code properly.

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I tried to upload the Code via Word doc so that it get copied with Formatting but without success. so I have done some formatting manually. Additionally attached the Query in word document, which I hope shall give better readability.

Or you could just paste it inside CODE tags, like everyone else does.