兩個usercontrol互相傳值

在A裡面透過建立一個事件，將 ChangePageSizeBySelect 讓 default.aspx能夠抓到事件， 讓default.aspx能夠抓到值，然後將值丟給B，做dropdownlist的databind A.ascx.vb(裡面的dropdownlist 一定要做autopost back) Public Property GetUC() As String Get GetUC = DropDownList1.SelectedValue End Get Set (value As String) DropDownList1.SelectedValue = value End Set End Property Public Delegate Sub UserControlEventHandler (ByVal sender As Object , ByVal str As String ) Public Event ChangePageSizeBySelect As UserControlEventHandler Protected Sub DropDownList1_SelectedIndexChanged( ByVal sender As Object, ByVal e As System.EventArgs ) Handles DropDownList1.SelectedIndexChanged RaiseEvent ChangePageSizeBySelect(Me , DropDownList1.SelectedValue) End Sub Default.aspx.vb Protected Sub order_mainCus_code_ChangePageSizeBySelect(sender As Object , str As String ) Handles order_mainCus_code.ChangePageSizeBySelect order_mainDiscus_customer.GetUC() = order_mainCus_code.GetUC() End Sub B.ascx.vb Public Property GetUC() As String Get GetUC = DropDownList1.SelectedValue End Get Set (value As String) Dim conn = New SqlConnection Dim cmd As SqlCommand Dim adapter As New SqlDataAdapter Dim ds As New DataSet Dim dt As New DataTable Dim SqlString As String conn.ConnectionString = System.Web.Configuration.WebConfigurationManager .ConnectionStrings( "ConnectionString").ConnectionString() '使用web config SqlString = "select * from discus_customer where cus_code='" & value & "'" 'Label1.Text = SqlString adapter = New SqlDataAdapter (SqlString, conn) adapter.Fill(ds, "Discus_customer" ) DropDownList1.DataValueField = "discus_code" DropDownList1.DataTextField = "discus_name" DropDownList1.DataSource = ds.Tables( "Discus_customer" ).DefaultView DropDownList1.DataBind() Label1.Text = SqlString End Set End Property