[VB.NET] รบกวนสอบถามเกี่ยวกับการเพิ่มข้อมูลใน DataGridView คะ (มือใหม่)

Imports System.Data.SqlClient
Public Class VendorSpecific
    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 VendorSpecific_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        'TODO: This line of code loads data into the 'SpecCompliantModule_01DataSet7.VendorSpecificMan' table. You can move, or remove it, as needed.
        Me.VendorSpecificManTableAdapter1.Fill(Me.SpecCompliantModule_01DataSet7.VendorSpecificMan)
        'TODO: This line of code loads data into the 'SpecCompliantModule_01DataSet9.VendorSpecificMan' table. You can move, or remove it, as needed.
        Me.VendorSpecificManTableAdapter.Fill(Me.SpecCompliantModule_01DataSet9.VendorSpecificMan)
        'TODO: This line of code loads data into the 'SpecCompliantModule_01DataSet1.VendorSpecific' table. You can move, or remove it, as needed.

        strConn = "Data Source=(LocalDB)\v11.0;Initial Catalog=SpecCompliantModule_01;Integrated Security=True;Connect Timeout=15;Encrypt=False;TrustServerCertificate=False"
        objConn.ConnectionString = strConn
        objConn.Open()

        strSQL = "SELECT * FROM [dbo].[VendorSpecificMan]"
        objCmd = New SqlCommand(strSQL, objConn)

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

        objConn.Close()
    End Sub

    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
        strConn = "Data Source=(LocalDB)\v11.0;Initial Catalog=SpecCompliantModule_01;Integrated Security=True;Connect Timeout=15;Encrypt=False;TrustServerCertificate=False"
        objConn.ConnectionString = strConn
        objConn.Open()

        strSQL = "INSERT INTO VendorSpecificMan([Vendor_Id],[Vendor_Feature Name],[Vendor_Sub Feature],[Vendor_Category Of Command],[Vendor_Command Name and Opcode]) VALUES (@[Vendor_Id],@[Vendor_Feature Name],@[Vendor_Sub Feature],@[Vendor_Category Of Command],@[Vendor_Command Name and Opcode])"
        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("@[Vendor_Id]", SqlDbType.Int).Value = DataGridView1.Rows(i).Cells(0).Value)
                    .Parameters.Add(New SqlParameter("@[Vendor_Feature Name]", SqlDbType.NVarChar).Value = DataGridView1.Rows(i).Cells(2).Value)
                    .Parameters.Add(New SqlParameter("@[Vendor_Sub Feature]", SqlDbType.NVarChar).Value = DataGridView1.Rows(i).Cells(3).Value)
                    .Parameters.Add(New SqlParameter("@[Vendor_Category Of Command]", SqlDbType.NVarChar).Value = DataGridView1.Rows(i).Cells(4).Value)
                    .Parameters.Add(New SqlParameter("@[Vendor_Command Name and Opcode]", SqlDbType.NVarChar).Value = DataGridView1.Rows(i).Cells(5).Value)

                End With
                objCmd.ExecuteNonQuery()
            End If
            MessageBox.Show("Data was saved success fully")
            objConn.Close()
        Next
    End Sub

    Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
        Dim hom As Form
        hom = HOME
        HOME.Show()
        Me.Hide()
    End Sub

    Private Sub Button3_Click(sender As Object, e As EventArgs) Handles Button3.Click
        Dim specComp As Spec_complaint_module
        specComp = Spec_complaint_module
        Spec_complaint_module.Show()
        Me.Hide()
    End Sub

End Class