本文介绍了DDL没有开火的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
当用户选择元素时，如何触发Dropdownlist？我的
代码是：
Private Sub DropDownList1_SelectedIndexChanged（ByVal sender As Object，ByVal
$ b $ as As System.EventArgs）处理DropDownList1。 SelectedIndexChanged
Dim selectedItem = DropDownList1.SelectedValue
Me.Label1.Text ="" + selectedItem +""
End Sub
How do I get a Dropdownlist to fire when the user selects an element? My
code is:
Private Sub DropDownList1_SelectedIndexChanged(ByVal sender As Object, ByVal
e As System.EventArgs) Handles DropDownList1.SelectedIndexChanged
Dim selectedItem = DropDownList1.SelectedValue
Me.Label1.Text = "" + selectedItem + ""
End Sub
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