Conversion from string "" to type 'Decimal' is not valid and Public member 'date' on type 'DBNull' not found in vb,net

I found an error at the time of double click in cell gridview because there is a blank or empty record in the DTE column and qty column. Is there the best solution or recommendation? note : I use visual studio 2010

Private Sub DataGridView1_CellDoubleClick(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles DataGridView1.CellDoubleClick
        x = DataGridView1.Rows.IndexOf(DataGridView1.CurrentRow)
txtCODE.Text = DataGridView1.Rows(x).Cells(0).Value.ToString()
Dim cellValue = DataGridView1.Rows(x).Cells(1).Value
        DateTimePicker1.Value = CDate(If(cellValue Is Nothing OrElse cellValue Is DBNull.Value, String.Empty, cellValue.ToString()))
        Dim cellValue1 = DataGridView1.Rows(x).Cells(2).Value
        NumericUpDown1.Value = CDec(If(cellValue1 Is Nothing OrElse cellValue1 Is DBNull.Value, String.Empty, cellValue1.ToString()))
End Sub

Note: This is an untested code. You need to check first if the columns DTE and QTY are not blank before assigning values to the controls.

Private Sub DataGridView1_CellDoubleClick(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles DataGridView1.CellDoubleClick
        x = e.RowIndex
        txtCODE.Text = DataGridView1.Rows(x).Cells(0).Value.ToString()

        Dim dt = DataGridView1.Rows(x).Cells(1).Value.ToString()
        Dim qty = DataGridView1.Rows(x).Cells(2).Value.ToString()

        ' Check if DTE column is not empty
        If dt <> nothing Then
            DateTimePicker1.Value = Cdate(dt).Date
        Else
            ' you can do something here
        End If
        
        ' Check if QTY column is a number
        If IsNumeric(qty) Then
            NumericUpDown1.Value = qty   
        Else
            NumericUpDown1.Value = 0
        End If
End Sub