为什么findcontrol（“x”）ASP.NET方法找不到通过javascript制作的HTML控件？ [英] Why findcontrol("x") ASP.NET method can not find a HTML control that made via javascript?

问题描述

嗨所有
我的网页上有一个可选联系人，用户可以为手机或电子邮件等任何联系人添加输入文字，当用户点击创建联系人按钮时，它会生成一个输入框属性如唯一ID（例如txtrelat1）或runat =server（在客户端但网页上有一个默认输入框id =txtrelat0）当用户点击提交按钮时，调用register方法在服务器端通过onserverclick事件，

主要问题是，当我使用form1.FindControl（txtrelat 0 ）时，它找到并且我可以将它转换为HtmlInputText但是当我想要form1.FindControl（txtrelat 1 ）时，它找不到并返回null？

谢谢所有



我尝试过：



HtmlInputText intex = FindControl（txtrelat0）为HtmlInputText;

解决方案

生成页面时，.net处理runat标记，它没有客户端的意义，并添加了一个带有runat标记的元素从javascript不会使它成为服务器端控件，它只是创建一个具有被忽略属性的元素。



你要做的就是确保输入你创建了一个唯一的名称（id是无关紧要的），并在你的服务器代码中使用Request.Form来读取值。因此，创建像

< input type =textname =text1/> 
< input type =textname =text2/> 

然后在您的服务器代码< br $>

 Request.Form [  text1 中]; 
 Request.Form [  text2]; 

hi all
my web page has an optional contact that user can add input text for any contact like cellphone or email,when user click create contact button, it make a input box with attributes like unique id(for example "txtrelat1") or runat="server"(in client-side but web page has an input box with id="txtrelat0" by default) and when user click submit button ,calls "register" method in server-side by onserverclick event,
main question is,when i use form1.FindControl("txtrelat0"),it's find and i can convert it to HtmlInputText but when i want form1.FindControl("txtrelat1") it's not find and return null?
thank's all

What I have tried:

HtmlInputText intex = FindControl("txtrelat0") as HtmlInputText;

解决方案

The runat tag is processed by .net when the page is generated, it has no meaning client-side and adding an element with a runat tag from javascript doesn't make that a server-side control, it simply creates an element with an attribute that is ignored.

What you have to do is ensure the input you create has a unique name (the id is irrelevant) and in your server code use Request.Form to read the value. So create boxes like

<input type="text" name="text1"/>
<input type="text" name="text2"/>

then in your server-code

Request.Form["text1"];
Request.Form["text2"];

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