Visual Basic

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Private Sub TxtboxReserch_TextChanged(sender As Object, e As EventArgs) Handles TxtboxReserch.TextChanged
       If TxtboxReserch.Text = "" Then
           For i = 0 To DataGridView1.RowCount - 1
               DataGridView1.Rows(i).Visible = True
           Next
       Else
           DataGridView1.ClearSelection()
           For i = 0 To DataGridView1.RowCount - 1
               Try
                   DataGridView1.Rows(i).Visible = (DataGridView1.Rows(i).Cells(1).Value Like "*" + TxtboxReserch.Text + "*")

               Catch ex As Exception

               End Try
           Next
       End If
   End Sub

Private Sub TxtboxReserch_TextChanged(sender As Object, e As EventArgs) Handles TxtboxReserch.TextChanged
       If TxtboxReserch.Text = "" Then
           For i = 0 To DataGridView1.RowCount - 1
               DataGridView1.Rows(i).Visible = True
           Next
       Else
           DataGridView1.ClearSelection()
           For i = 0 To DataGridView1.RowCount - 1
               Try
                   DataGridView1.Rows(i).Visible = (DataGridView1.Rows(i).Cells(1).Value Like "*" + TxtboxReserch.Text + "*")

               Catch ex As Exception

               End Try
           Next
       End If
   End Sub

Private Sub Button9_Click(sender As Object, e As EventArgs) Handles Button9.Click
      Dim i As Integer = DataGridView1.CurrentRow.Index + 1
      If i < 0 Then i = 0
      DataGridView1.CurrentCell = Me.DataGridView1.Rows(i).Cells(0)
      DataGridView1.Rows(i).Selected = True







  End Sub

OpenFileDialog1.ShowDialog()