如何在C＃中从javascript到codebehind获取值 [英] How to get the values from javascript to codebehind in C#

问题描述

大家好，

我正在做一个电子商务项目。我正在使用java脚本获取用户国家和系统的IP地址。我已经在标签中使用了这些值。标签中的值我必须使用asp控件来更新货币。但是当我运行代码时它表示innerHTML中没有值。我必须从java脚本中获取标签值并在后面的代码中使用它。我怎么能超过来吧。请帮帮我。我的示例代码如下。

 <   script     src   =   http://code.jquery.com/jquery-1.8.2.js   类型  =  text / javascript >  <   / script  >  
 <   script    类型  =  text / javascript > ;  
 var strip，strcountry，strcity，strregion，strlatitude，strlongitude，strtimezone 
 function GetUserInfo（data）{
 strip = data.host; strcountry = data.countryName; strcity = data.city; 
 strregion = data.region; strlatitude = data.latitude; strlongitude = data.longitude; 
 strtimezone = data.timezone; 
} 
 $（function（）{
 BindUserInfo（）; 
}）
函数BindUserInfo（）{
 document.getElementById（'lblIP'） .innerHTML = strip; 
 document.getElementById（'lblCountry'）。innerHTML = strcountry; 
 <   / script  >  
 
 <   script     type   =  text / javascript     src   = < span class =code-keyword> http://smart-ip.net/geoip-json?callback=GetUserInfo >  <   / script  >  
 < span class =code-keyword><   / head  >  
 
 <   body  &g t;  
 <   div  >  
 <   table     id   =  tbDetails    cellpadding   =  2    cellspacing   =  2    style   =  border：1px solid＃000;< br mode =    hold   = < span class =code-keyword> /> font-family：Verdana; >  
 <   tr     style   =  background-color：＃DC5807;白颜色; font-weight：bold >  
 <   td     colspan   =  2    align   =  center >  
用户信息
 <   / td  >  
 <   / tr  >  
 <   tr     style   =  border：solid 1px＃000000  >  
 <   td     align   =  right >  
  IP： 
 <   / td  >  
 <   td  >  
 <   label     id   =  lb lIP    /  >  
 <   / td  >  
 <   / tr  > ;  <   / table  >  <   / div  >  

解决方案

（function（）{
BindUserInfo（）;
}）
函数BindUserInfo（）{
document.getElementById（'lblIP'）。innerHTML = strip;
document.getElementById（'lblCountry'）。innerHTML = strcountry;
< / script >

< script type = text / javascript src = < span class =code-keyword> http://smart-ip.net/geoip-json?callback=GetUserInfo > < / script >
< span class =code-keyword>< / head >

< body &g t;
< div >
< table id = tbDetails cellpadding = 2 cellspacing = 2 style = border：1px solid＃000;< br mode = hold = < span class =code-keyword> /> font-family：Verdana; >
< tr style = background-color：＃DC5807;白颜色; font-weight：bold >
< td colspan = 2 align = center >
用户信息
< / td >
< / tr >
< tr style = border：solid 1px＃000000 >
< td align = right >
IP：
< / td >
< td >
< label id = lb lIP / >
< / td >
< / tr > ; < / table > < / div >

HI，





使用 innerText 在javascript中为标签控件赋值

  document  .getElementById（'  lblIP'）。innerText =   some; 
 

在asp.net中你无法获得代码背后的标签控制值在客户端更新（即javascript）



简单的方法是你可以使用隐藏字段将值存储在javascript中，你可以在后面的代码中读取相同内容。





示例：



每当你给标签赋值时，也要更新相应的隐藏字段

  document  .getElementById（'  lblIP'）。innerText =   some; 
  document  .getElementById（'  hdn_lblIP').value =   some; 

在您的页面中创建隐藏控件..

 <   asp：HiddenField     ID  < span class =code-keyword> =  hdn_lblIP    runat   =  server    /  >  

服务器中的
（代码隐藏）你可以这样阅读

 取值tring  ipvalue = hdn_lblIP.Value; 

希望你理解。

访问这里.....





http://www.aspdotnet-suresh.com/2013/10/javascript-get-aspnet-textbox-value-label-value.html [ ^ ]

Hello every one,
I am doing a e-commerce project.In that i am using java script for getting users country and system's IP address.I have taken those values in labels.using that value from the label i have to update currency using asp controls.But when i run the code it is saying there is no value in innerHTML.I have to get label value from java script and have use it in code behind.How can i over come this.Please help me.My sample code is below.

<script src="http://code.jquery.com/jquery-1.8.2.js" type="text/javascript"></script>
    <script type="text/javascript">
        var strip, strcountry, strcity, strregion, strlatitude, strlongitude, strtimezone
        function GetUserInfo(data) {
            strip = data.host; strcountry = data.countryName; strcity = data.city;
            strregion = data.region; strlatitude = data.latitude; strlongitude = data.longitude;
            strtimezone = data.timezone;
        }
        $(function () {
            BindUserInfo();
        })
        function BindUserInfo() {
            document.getElementById('lblIP').innerHTML = strip;
            document.getElementById('lblCountry').innerHTML = strcountry;
</script>

    <script type="text/javascript" src="http://smart-ip.net/geoip-json?callback=GetUserInfo"></script>
</head>

<body>
    <div>
        <table id="tbDetails" cellpadding="2" cellspacing="2" style="border: 1px solid #000;<br mode=" hold=" />            font-family: Verdana;">
            <tr style="background-color: #DC5807; color: White; font-weight: bold">
                <td colspan="2" align="center">
                    User Information
                </td>
            </tr>
            <tr style="border: solid 1px #000000">
                <td align="right">
                    IP:
                </td>
                <td>
                    <label id="lblIP" />
                </td>
            </tr></table></div>

解决方案

(function () { BindUserInfo(); }) function BindUserInfo() { document.getElementById('lblIP').innerHTML = strip; document.getElementById('lblCountry').innerHTML = strcountry; </script> <script type="text/javascript" src="http://smart-ip.net/geoip-json?callback=GetUserInfo"></script> </head> <body> <div> <table id="tbDetails" cellpadding="2" cellspacing="2" style="border: 1px solid #000;<br mode=" hold=" /> font-family: Verdana;"> <tr style="background-color: #DC5807; color: White; font-weight: bold"> <td colspan="2" align="center"> User Information </td> </tr> <tr style="border: solid 1px #000000"> <td align="right"> IP: </td> <td> <label id="lblIP" /> </td> </tr></table></div>

HI,


use innerText to assign values to the label control in javascript

document.getElementById('lblIP').innerText = "some";

in asp.net you cannot get the values of label control in code behind which is updated in the client side ( ie javascript )

simple way is you can use hidden field to store the values in the javascript and you can read the same in the code behind.


example:

whenever u r assigning a value to the label, update the corresponding hidden field as well

document.getElementById('lblIP').innerText = "some";
            document.getElementById('hdn_lblIP').value = "some";

create a hidden control in your page..

<asp:HiddenField ID="hdn_lblIP" runat="server" />

in the server ( code behind ) you can read like this

string ipvalue =  hdn_lblIP.Value;

hope you understood.

visit here.....


http://www.aspdotnet-suresh.com/2013/10/javascript-get-aspnet-textbox-value-label-value.html[^]

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