从asp.net Ajax应用程序对asmx/js进行多次调用 [英] Multiple calls made to asmx/js from asp.net Ajax application

问题描述

我正在研究一个ASP.NET3.5和Ajax应用程序的性能优化.有一个调用服务的Ajax级联下拉列表-CityListProvider.asmx.在Fiddler工具捕获请求/响应的同时运行该应用程序时，我看到对URL进行了多次调用-CityListProvider.asmx/js.

我知道可以调用CityListProvider.asmx/js来创建ajax客户端代理，但是为什么要多次调用来创建代理.它不会每隔一次改变吗?我肯定我在这里缺少什么..有人可以为此提供一些指导吗.

谢谢，
Ramesh

Hi,

I am working on performance tuning of one ASP.NET3.5 and Ajax application. There is a Ajax cascading dropdown list that calls the service - CityListProvider.asmx. When I run the application while the Fiddler tool is capturing the requests/responses, I see that there are multiple calls made for the URL - CityListProvider.asmx/js.

I understand that CityListProvider.asmx/js is called to create the ajax client proxy, but why should there be multiple calls to create the proxy. It''s not going to change every other time right? I am sure I am missing something here .. could someone please provide some direction on this.

Thanks,
Ramesh

推荐答案

不看代码很难说.基本上，只有在发生触发您呼叫的事件(例如选择更改)时，您才应该看到对.asmx的呼叫.

查看此CascadingDropDown页面 [

It is very hard to say with out looking at the code. Basically you should only see a call to your .asmx when there is an event that triggers a call to you, like selection changes.

Look at this CascadingDropDown page[^] I run it and noticed on Fiddler that the call the respective .asmx was done only when I changed a value in the drop down menu. Compare your page with that and see what is different, may be that will give you a hint.

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