通过客户端触发服务端事件

注：在页面中有一个button和dropdownlist两个控件，用dropdownlist模拟button的服务端事件.

Partial Class _Default
    Inherits System.Web.UI.Page

    Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnResponse.Click
        Response.Write("您选择了: " + Me.ddlValue.SelectedValue.ToString)
    End Sub

 
    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        Dim cm As ClientScriptManager = Page.ClientScript
        Dim strCMD As String = cm.GetPostBackClientHyperlink(btnResponse, "")
        Me.ddlValue.Attributes.Add("onchange", strCMD)

    End Sub
End Class