VB.net สอบถาม code บันทึกข้อมูลเข้า Database โดยใช้ Datagridview

Public Class MainForm
    Dim objConn As New SqlConnection
    Dim objCmd As New SqlCommand
    Dim strConn, strSQL As String
    Dim da As New SqlDataAdapter
    Dim dt As New DataTable

    Private Sub MainForm_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
        strConn = "Server=SWEETCHIN-PC;Database=UpCountry;Trusted_Connection=True;"
        objConn.ConnectionString = strConn
        objConn.Open()

        strSQL = "SELECT * FROM RepairDevice"
        objCmd = New SqlCommand(strSQL, objConn)

        da.SelectCommand = objCmd
        da.Fill(dt)
        DataGridView1.DataSource = dt
        da.Update(dt)

        objConn.Close()


    End Sub

    Private Sub btnSave_Click(sender As System.Object, e As System.EventArgs) Handles btnSave.Click
        strConn = "Server=SWEETCHIN-PC;Database=UpCountry;Trusted_Connection=True;"
        objConn.ConnectionString = strConn
        objConn.Open()

        strSQL = "INSERT INTO RepairDevice(MR_NO,IN_Date,CE_Name,Site,Type,Device,Serial_NO,Detail,OUT_Date,Complete) values(@MR_NO,@IN_Date,@CE_Name,@Site,@Type,@Device,@Serial_NO,@Detail,@OUT_Date,@Complete)"
        For i As Integer = 0 To DataGridView1.RowCount - 1
            If Not DataGridView1.Rows(i).IsNewRow Then
                objCmd = New SqlCommand(strSQL, objConn)
                With objCmd
                    .Parameters.Add(New SqlParameter("@MR_NO", DataGridView1.Rows(i).Cells(0).Value))
                    .Parameters.Add(New SqlParameter("@IN_Date", DataGridView1.Rows(i).Cells(1).Value))
                    .Parameters.Add(New SqlParameter("@CE_Name", DataGridView1.Rows(i).Cells(2).Value))
                    .Parameters.Add(New SqlParameter("@Site", DataGridView1.Rows(i).Cells(3).Value))
                    .Parameters.Add(New SqlParameter("@Type", DataGridView1.Rows(i).Cells(4).Value))
                    .Parameters.Add(New SqlParameter("@Device", DataGridView1.Rows(i).Cells(5).Value))
                    .Parameters.Add(New SqlParameter("@Serial_NO", DataGridView1.Rows(i).Cells(6).Value))
                    .Parameters.Add(New SqlParameter("@Detail", DataGridView1.Rows(i).Cells(7).Value))
                    .Parameters.Add(New SqlParameter("@OUT_Date", DataGridView1.Rows(i).Cells(8).Value))
                    .Parameters.Add(New SqlParameter("@Complete", DataGridView1.Rows(i).Cells(9).Value))
                End With
objCmd.ExecuteNonQuery()
            End If
            MessageBox.Show("บันทึกข้อมูลแล้ว")
            objConn.Close()
        Next
    End Sub
End Class