Datagridview form always open with row in selected state - vb.net

Question

I have two forms: frmMain and frmProduct
In the main form frmMain, I have a Datagridview1 and the buttons: tsbInsert_click, tsbAlter_click and tsbConsult_click.
When I open the main form frmMain, there is still no row in the Datagridview1 and when I click on any of the tsbAlter_click or tsbConsult_click buttons, the code displays the message "Select a product", which is correct , because there is still no product created in the register.
When I click on the tsbInsert_click button, the code opens the frmProduct to insert a record in the register and then returns to the main form frmMain, which, in the line of the Datagridview1, shows the record that was included.
The problem is that when I include a record in the register, the Datagridview1 ALWAYS returns with the state of the selected row, and the condition If DGProducts.CurrentRow Is Nothing is never true again ... so when I click on tsbAlter_click or tsbConsult_click, the "Select a product" message no longer appears and it should have since I didn't select any rows in Datagridview1.
frmMain Code:
Public Class frmMain
Private Sub tsbInsert_Click(sender As Object, e As EventArgs) Handles tsbInsert.Click
Using frm As New frmProduct("Insert", "")
frm.ShowDialog()
If frm.txtPrdCod.Text <> "" Then
DGProducts.Rows.Add(Campo(0), Campo(1), Campo(2))
End If
End Using
End Sub
Private Sub tsbAlter_Click(sender As Object, e As EventArgs) Handles tsbAlter.Click
If DGProducts.CurrentRow Is Nothing Then
MessageBox.Show("Select a product")
Exit Sub
End If
Dim codProd As String = DGProducts.CurrentRows.Cells("prdCod").Value
Using frm As New frmProduct("Alter", codProd)
frm.ShowDialog()
With DGProducts.Rows(DGProds.CurrentCell.RowIndex)
.Cells("prdCod").Value = Field(0)
.Cells("prdName").Value = Field(1)
.Cells("prdManufac").Value = Field(2)
End With
End Using
End Sub
Private Sub DGProducts_CellEnter(sender As Object, e As DataGridViewCellEventArgs) Handles DGProducts.CellEnter
With DGProducts.Rows(DGProducts.CurrentCell.RowIndex)
Campo(0) = .Cells("prdCod").Value
Campo(1) = .Cells("prdName").Value
Campo(2) = .Cells("prdManufac").Value
End With
End Sub
End Class
frmProduct code:
Public Class frmProduct
Private Sub frmProduct_Load(sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
If _operation = "Alter" Then
txtPrdCod.Text = Campo(0)
txtPrdName.Text = Campo(1)
txtManufct.Text = Campo(2)
Else
txtPrdCod.Text = ""
txtPrdName.Text = ""
txtManufct.Text = ""
Enf If
End Sub
Dim _operation As String
Dim _codProd As String
Public Sub New(operation As String, codProd As String)
InitializeComponent()
Select Case operation
Case "Insert"
_operation = operation
Case "Alter"
_operation = operation
_codProd = codProd
Case Else
MessageBox.Show("Invalid option!")
Close()
End Select
End Sub
Private Sub tsbRecord_Click(sender As Object, e As EventArgs) Handles tsbRecord.Click
Field(0) = txtPrdCod.Text
Field(1) = txtPrdName.Text
Field(2) = txtManufct.Text
Me.Close()
End Sub
End Class
How do I make it so that when I add a product to the register, Datagridview1 DOES NOT return with the line in the SELECTED state and the message "Select a product" appears when I don't select a line from Datagridview1?

Answer 1

The command DGProducts.Rows.Add(Field(0), Field(1), Field(2)), automatically changes the value DGProducts.SelectedRows.Count to 1, so I set DGProducts.CurrentCell = Nothing after command DGProducts.Rows.Add in code:
Private Sub tsbInsert_Click(sender As Object, e As EventArgs) Handles tsbInsert.Click
Using frm As New frmProduct("Insert", "")
frm.ShowDialog()
If frm.txtPrdCod.Text <> "" Then
DGProducts.Rows.Add(Campo(0), Campo(1), Campo(2))
DGProducts.CurrentCell = Nothing
End If
End Using
End Sub