如何从Dropdownlist后面的c＃代码中获取javascript函数 [英] How to a javascript function from c# code behind of Dropdownlist

问题描述

我需要在下拉列表中选择的索引更改事件中调用两个不同的函数。

我有ddl_SelectedIndexChanged事件。它将数据绑定到转发器。

现在我写了一个函数，用查询字符串重写页面的url。



我想要的是使用querystring参数填充该转发器。



我试过的是，首先将事件绑定到page_load中的ddl（）

Hi,
I need to call two different functions on the dropdownlist's selected index change event.
I have ddl_SelectedIndexChanged event. which binds data to a repeater.
Now I wrote a function which rewrite the url of the page with query string.

What I want is to populate that repeater with the querystring parameter.

What I've tried is, first bind the event to ddl in page_load()

ddl.SelectedIndexChanged+=new EventHandler(ddl_SelectedIndexChanged);

和

and

if(!Page.IsPostBack)
            {
<pre>ddl.Attributes.Add("onchange", "RedirectURL();  return true;");
}</pre>

如需参考



我有

For ref.

I am having

protected void ddlBrokerLocation_SelectedIndexChanged(object sender, EventArgs e)
       {
           if (ddlBrokerLocation.SelectedIndex > 0)
           {
               rptRepeater.DataSource = some table;
               rptRepeater.DataBind();

           }
       }

您可以看到只有一个函数可能被调用。

在这种情况下，onchange被调用，因此转发器没有绑定。



是否有任何建议？

任何解决方法？

You can see only one function may get called.
In this case "onchange" got called and thus repeater not binded.

Any suggessions please?
Any workaround?

推荐答案

试试这个，在选择更改时检测值&如果回发设置为false，则在javascript中调用该函数。否则，你可以使用背后的代码

Try This, On select change detect the value & Call that function in javascript if the postback is set to false. Otherwise ,you can use the code behind

试试这个我希望这个链接可以帮助你...

try this i hope this link help you...

http://stackoverflow.com/questions/10861895/call-javascript-function-on-dropdownlist-selectedindexchanged-event

[ ^ ]

这篇关于如何从Dropdownlist后面的c＃代码中获取javascript函数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！