แก้ error ได้แล้วค่ะ รบกวนถามพี่ๆต่อว่า ทำไมเคลียร์ textbox ไม่ได้คะ vb.net2010 ค่ะ

Imports System.Data.OleDb

Public Class frm_employee
    'Public connString As String = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=db.accdb"
    Dim conn As New OleDbConnection
    Dim myqry As String = Nothing
    Dim mycmd As New OleDbCommand
    Dim mydr As OleDbDataReader

    Dim str As String = Nothing

    Private Sub frm_employee_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Call LVsettings()
        Call ConnToDB()
        Call FillListview()
        Call Set1()
    End Sub

#Region "FillListView"

    Sub FillListview()
        LV.Items.Clear()
        myqry = "SELECT * from Employee ORDER BY id ASC"
        mycmd = New OleDbCommand(myqry, conn)
        mydr = mycmd.ExecuteReader