ขอคำแนะนำหน่อยครับ form load ต้องการดึงข้อมูลมา 2 table มาใส่อย่างละตัวของ combobox1 และ combobox2

Imports MySql.Data.MySqlClient

Public Class Frm_bill
    Dim MysqlConn As MySqlConnection
    Dim COMMAND As MySqlCommand
    Dim COMMAND1 As MySqlCommand
    Dim datememo As String

    Private Sub Frm_bill_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        datememo = Date.Today.ToString("dd/MM/yyyy")
        date_memo.Text = datememo

        MysqlConn = New MySqlConnection
        MysqlConn.ConnectionString = "Server=localhost;User Id=root;Password=p@ssw0rd;Database=db_bill"
        Dim READER As MySqlDataReader
        Dim READER1 As MySqlDataReader
        Try
            MysqlConn.Open()
            Dim Query As String
            Query = "SELECT * FROM company"
            COMMAND = New MySqlCommand(Query, MysqlConn)
            READER = COMMAND.ExecuteReader

            While READER.Read
                Dim name_cpth = READER.GetString("name_cpth")
                ComboBox1.Items.Add(name_cpth)
            End While
        Catch ex As MySqlException
            MessageBox.Show(ex.Message)
        End Try

        Try
            MysqlConn.Open()
            Dim Query1 As String
            Query1 = "SELECT * FROM customer"
            COMMAND1 = New MySqlCommand(Query1, MysqlConn)
            READER1 = COMMAND1.ExecuteReader

            While READER1.Read
                Dim name_ctth = READER1.GetString("name_ctth")
                ComboBox2.Items.Add(name_ctth)
            End While
        Catch ex As MySqlException
            MessageBox.Show(ex.Message)
        End Try
    End Sub

    Private Sub ComboBox1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ComboBox1.SelectedIndexChanged
        MysqlConn = New MySqlConnection
        MysqlConn.ConnectionString = "Server=localhost;User Id=root;Password=p@ssw0rd;Database=db_bill"
        Dim READER As MySqlDataReader

        Try
            MysqlConn.Open()
            Dim Query As String
            date_memo.Text = Date.Today.ToString("yyyy-MM-dd")
            Query = "SELECT * FROM company WHERE name_cpth = '" & ComboBox1.Text & "'"
            COMMAND = New MySqlCommand(Query, MysqlConn)
            READER = COMMAND.ExecuteReader

            While READER.Read
                CPN_id_company.Text = READER.GetString("id_company")
                CPN_name_cpth.Text = READER.GetString("name_cpth")
                CPN_address_cpth.Text = READER.GetString("address_cpth")
                CPN_telephone.Text = READER.GetString("telephone")
                CPN_mobile.Text = READER.GetString("mobile")
                CPN_fax.Text = READER.GetString("fax")
                CPN_tex.Text = READER.GetString("tex")
            End While
        Catch ex As MySqlException
            MessageBox.Show(ex.Message)
        End Try
    End Sub

    Private Sub ComboBox2_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ComboBox2.SelectedIndexChanged
        MysqlConn = New MySqlConnection
        MysqlConn.ConnectionString = "Server=localhost;User Id=root;Password=p@ssw0rd;Database=db_bill"
        Dim READER1 As MySqlDataReader

        Try
            MysqlConn.Open()
            Dim Query1 As String
            date_memo.Text = Date.Today.ToString("yyyy-MM-dd")
            Query1 = "SELECT * FROM customer WHERE name_ctth = '" & ComboBox2.Text & "'"
            COMMAND1 = New MySqlCommand(Query1, MysqlConn)
            READER1 = COMMAND1.ExecuteReader

            While READER1.Read
                CTM_id_customer.Text = READER1.GetString("id_customer")
                CTM_name_ctth.Text = READER1.GetString("name_ctth")
                CTM_address_ctth.Text = READER1.GetString("address_ctth")
                CTM_telephone.Text = READER1.GetString("telephone")
                CTM_mobile.Text = READER1.GetString("mobile")
                CTM_fax.Text = READER1.GetString("fax")
                CTM_tex.Text = READER1.GetString("tex")
            End While
        Catch ex As MySqlException
            MessageBox.Show(ex.Message)
        End Try
    End Sub
End Class