我的DropDownList处理程序没有执行。 [英] My DropDownList handler isn't executing.

问题描述

我有一个asp：dropdownlist设置为autopostback。


然而，我的处理程序似乎没有执行（即使有一个


这里是DDL：


< asp：dropdownlist id = ddl_districtSelect runat =" server" AutoPostBack =" True"

（列表项）

< / asp：dropdownlist>


和处理程序：


Private Sub ddl_districtSelect_SelectedIndexChanged（ByVal sender As

System.Object，ByVal e As System.EventArgs）Handles

ddl_districtSelect。 SelectedIndexChanged

response.Write（" MONKEY"）

End Sub


任何原因导致无法执行？


-Darrel

I have a asp:dropdownlist set to autopostback.

However, my handler doesn''t seem to execute (even though there is a
postback).

Here''s the DDL:

<asp:dropdownlist id=ddl_districtSelect runat="server" AutoPostBack="True">
(list items)
</asp:dropdownlist>

and the handler:

Private Sub ddl_districtSelect_SelectedIndexChanged(ByVal sender As
System.Object, ByVal e As System.EventArgs) Handles
ddl_districtSelect.SelectedIndexChanged
response.Write("MONKEY")
End Sub

Any reason why this wouldn''t be executing?

-Darrel

推荐答案

>但是，我的处理程序似乎没有执行（即使有一个

> However, my handler doesn''t seem to execute (even though there is a

回发）。

嗯...我也是有另一个问题。自动回发不保留

选择的值。它一直在恢复到第一项。


我通常不会使用下拉自动回发，所以我完全没有

''获得这里有一些基本概念吗？


-Darrel

Hmm...I also have another problem. The auto-postback isn''t retaining the
selected value. It keeps reverting to the first item.

I don''t normally use drop down auto-postbacks, so am I just completely not
''getting'' some fundamental concept here?

-Darrel

每次页面加载时你重新绑定数据吗？这可能是你的b $ b问题。你只需要绑定一次。


darrel <无***** @ hotmail.com>在消息中写道

news：％2 **************** @ TK2MSFTNGP09.phx.gbl ...

Are you rebinding the data every time the page loads? This may be your
problem. You only need to bind once.

"darrel" <no*****@hotmail.com> wrote in message
news:%2****************@TK2MSFTNGP09.phx.gbl...

然而，我的处理程序似乎没有执行（即使有回发）。

However, my handler doesn''t seem to execute (even though there is a
postback).

嗯...我还有另一个问题。自动回发不保留
选定的值。它一直在恢复到第一项。

我通常不会使用下拉式自动回发，所以我完全没有获得一些基本概念吗？ br />
-Darrel

Hmm...I also have another problem. The auto-postback isn''t retaining the
selected value. It keeps reverting to the first item.

I don''t normally use drop down auto-postbacks, so am I just completely not
''getting'' some fundamental concept here?

-Darrel

每次页面加载时是否重新绑定数据？这可能是你的问题。你只需要绑定一次。

Are you rebinding the data every time the page loads? This may be your
problem. You only need to bind once.

不。根本没有数据绑定。只是一个简单的选项列表就在HTML

本身。


-Darrel

Nope. no databinding at all. Just a simple option list right in the HTML
itself.

-Darrel

这篇关于我的DropDownList处理程序没有执行。的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！