Handles clause requires a WithEvents variable defined in the containing type or one of its base types.

在以下代码中..

Public Sub selCurrentManuf_SelectedIndexChanged(ByVal sender As System.Object,ByVal e As System.EventArgs) _
    Handles selCurrentManuf.SelectedIndexChanged

    End Sub

随附的下拉列表如下……

<asp:DropDownList  
   OnSelectedIndexChanged="selCurrentManuf_SelectedIndexChanged" 
   selectedvalue='<%#Container.DataItem("c1_manufidcurrent")%>' 
    ID="selCurrentManuf" 
    Runat="Server" 
    DataTextField="c4_Desc" 
    DataValueField="c4_manufid"
    DataSource="<%# GetCurrentManuf() %>" 
    autopostback="true" 
 ></asp:DropDownList>