DDL没有开火 [英] DDL not firing

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

推荐答案

嗨Niggy，


确保你的asp：dropdownlist标签有runat =" server" atrribute和

事件在InitialiseComponent子中正确连接。


HTH

Dan


" Niggy"写道：

Hi Niggy,

Make sure your asp:dropdownlist tag has the runat="server" atrribute, and
that the event is wired up correctly in the InitialiseComponent sub.

HTH
Dan

"Niggy" wrote:

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
e As System.EventArgs）Handles 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

谢谢Dan。 RUNAT = QUOT;服务器"没关系，但是没有引用一个事件在
中的InitialiseComponent子。我该怎么办？

Thanks Dan. Runat="server" is ok, but there is no reference to an event in
the InitialiseComponent sub. What should I put?

确保AutoPostBack = true


Eliyahu


" Niggy" <镍*** @ discussions.microsoft.com>在留言中写道

新闻：B1 ********************************** @ microsof t.com ...

Make sure AutoPostBack = true

Eliyahu

"Niggy" <Ni***@discussions.microsoft.com> wrote in message
news:B1**********************************@microsof t.com...

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 e As System.EventArgs）Handles 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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