[ابراهيم ايبو]

السلام عليكم
تفضل اخي الكريم

كود :

Imports System.Data.OleDb
Public Class Form1
   Public con As New OleDbConnection("provider=Microsoft.Ace.OLEDB.12.0;" & "data source=MyData.accdb")

   ' صب لملء اي كومبو
   Private Sub fillCombo(strsql As String, Cmb As ComboBox)
       Try
           Dim dtf As New DataTable
           Dim da As New OleDbDataAdapter(strsql, con)
           dtf.Clear()
           da.Fill(dtf)
           Cmb.DataSource = dtf
       Catch ex As Exception

       End Try
   End Sub
   Private Sub ComboBox1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ComboBox1.SelectedIndexChanged

       fillCombo("SELECT * FROM Data_Country WHERE ID_Country = " & ComboBox1.SelectedValue, ComboBox2)
       ComboBox2.DisplayMember = "City"
       ComboBox2.SelectedIndex = -1
   


   End Sub

   Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
       fillCombo("SELECT * FROM Country", ComboBox1)
       ComboBox1.DisplayMember = "Country"
       ComboBox1.ValueMember = "ID_Country"
       ComboBox1.SelectedIndex = -1
     

 End Sub
End Class