在后面的代码中访问 .cs 文件中的 javascript 变量值？
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Access javascript variable's value in .cs file that is in in code behind?
提问by Zoya
I want to access java script's return value , which in is in a variable and a label, i want to use it in .cs file, how do i do that? I have fetch the out put of javascript in a variable and also a label control of asp.net... I get the values both the ways, but in need it .cs file to save it in my data bsae, help me please.. Thank u
我想访问 java 脚本的返回值，它在一个变量和一个标签中，我想在 .cs 文件中使用它，我该怎么做？我已经在一个变量和 asp.net 的标签控件中获取了 javascript 的输出......我得到了两种方式的值，但需要它的 .cs 文件将它保存在我的数据 bsae 中，请帮助我。 。 感谢你
<script language=Javascript>
function setup_ip(json) {
var htmlx = " Your IP Address: <b>" + json.IP;
htmlx += "</b> | Country: " + json.countryName;
if (json.cityName != "Unknown" || json.regionName != "Unknown") {
htmlx += " | City: " + json.cityName + " / " + json.regionName;
var s = " | City: " + json.cityName + " / " + json.regionName;
} else {
htmlx += " | Your Time: " + json.localTimeZone;
}
$("#myipx").html(htmlx);
// $('#<%= lbl1.ClientID %>').text(htmlx);
$('#<%= lbl1.ClientID %>').text(s);
// var txtCountry = document.getElementById('<%=lbl1.ClientID %>');
}
$(document).ready(function() {
EasyjQuery_Get_IP("setup_ip", "full");
});
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<div class="inner">
<p class="welcome-message">
<a href="http://www.easyjquery.com/detect-get-clients-ip-address-country-using-javascript-php/"id="topid" title="Javascript, PHP jQuery API Detect Clients IP Address and Country - Geo Location" >
<asp:Label ID="myipx" runat="server" ClientIDMode="Static"></a></asp:Label>Detecting Clients IP Address - Country - City</span>
<br />
<asp:Label ID="lbl1" runat="server" ClientIDMode="Static"></asp:Label>
</p>
<asp:TextBox ID="txtCountry" runat="server"></asp:TextBox>
<!-- END #footer-texture -->
</div>
</div>
</form>
</body>
回答by T.J. Crowder
To send client-side information (the JavaScript result/variable) to the server, you must...send the information to the server. :-) You can do that in a variety of ways, the two best for updating a database would be:
要将客户端信息（JavaScript 结果/变量）发送到服务器，您必须...将信息发送到服务器。:-) 您可以通过多种方式做到这一点，更新数据库的两种最佳方式是：
- Ajax- A means of sending data from the client to the server without page refresh
- Form submission - A standard form submission
- Ajax- 一种无需刷新页面即可将数据从客户端发送到服务器的方法
- 表单提交 - 标准表单提交
回答by Raab
Create a server side hidden field, Place javascript value in it. and read value form hidden field on server side.
创建一个服务器端隐藏字段，在其中放置 javascript 值。并从服务器端的隐藏字段中读取值。
Html
html
<input type="hidden" id="myhidden" runat="server">
Access in javascript
在javascript中访问
document.getElementById("myhidden").value="jsvalue";
Access in code behind
在后面的代码中访问
myhidden.Value
OR
或者
you can use ajax to send data to the server.
您可以使用ajax向服务器发送数据。
回答by Sunny
To use this values you have following options :
要使用此值，您有以下选项：
1.)As label is your server side control you can easily access label text value in .cs file so main issue with javascript variable here you can assign this value to asp:hidden field so you can also access this in .cs file like :
1.) 由于标签是您的服务器端控件，您可以轻松访问 .cs 文件中的标签文本值，因此这里的 javascript 变量的主要问题您可以将此值分配给 asp:hidden 字段，以便您也可以在 .cs 文件中访问它，例如：
<script language=Javascript>
function setup_ip(json) {
$("#hdn").val('your javascript variable');
}
</script>
<asp:ScriptManager ID="ScriptManager1" runat="server" EnablePageMethods="true" ScriptMode="Release">
</asp:ScriptManager>
<asp:UpdatePanel ID="UpnlHidden" runat="server">
<ContentTemplate>
<input runat="server" type="hidden" id="hdn" value="0" />
</ContentTemplate>
</asp:UpdatePanel>
cs file :
.cs 文件：
string str = hdn.value//Where ever you want to store value
2.)Another option you can use pagemethod here and pass both values as parameter to .cs file.
2.) 另一个选项，您可以在此处使用 pagemethod 并将两个值作为参数传递给 .cs 文件。
javascript :
javascript :
PageMethods.getValue(parameter1,parameter2, OnSucceeded, OnFailed);
function OnSucceededID(result, methodName)
{
//get result back if you want after successfully execution of pagemethod on server side
}
function OnFailedID(error, methodName) {
if (error !== null) {
alert(error.get_message());
}
}
CS file :
CS文件：
[WebMethod(enableSession: true)]
public static returntype getValue(parameter type parameter1,parameter type parameter2)
{
do what you want to do with these values.
}
Hope it helps you.
希望对你有帮助。
回答by Zoya
This is the javascript and aspx page
这是 javascript 和 aspx 页面
<script language="Javascript" type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>
<script language="Javascript" type="text/javascript" src="http://api.easyjquery.com/easyjquery.js"></script>
<script language=Javascript>
function setup_ip(json) {
var htmlx = " Your IP Address: <b>" + json.IP;
htmlx += "</b> | Country: " + json.countryName;
var s = " | City: " + json.cityName + " / " + json.regionName;
$("#hdn").val(s);
if (json.cityName != "Unknown" || json.regionName != "Unknown") {
htmlx += " | City: " + json.cityName + " / " + json.regionName;
s = " | City: " + json.cityName + " / " + json.regionName;
} else {
htmlx += " | Your Time: " + json.localTimeZone;
}
}
$(document).ready(function() {
EasyjQuery_Get_IP("setup_ip", "full");
});
function testValue() {
$('#hdn').val();
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:ScriptManager ID="ScriptManager1" runat="server" EnablePageMethods="true" ScriptMode="Release">
</asp:ScriptManager>
<asp:UpdatePanel ID="UpnlHidden" runat="server">
<ContentTemplate>
<input runat="server" type="hidden" id="hdn" value="0" />
</ContentTemplate>
</asp:UpdatePanel>
<div class="inner">
<p class="welcome-message">
<a ><href="http://www.easyjquery.com/detect-get-clients-ip-address-country-using-javascript-php/"id="topid" title="Javascript, PHP jQuery API Detect Clients IP Address and Country - Geo Location" ></a>
<asp:TextBox ID="loc" runat="server"></asp:TextBox>
</p>
<asp:Button ID="Button1" runat="server" Text="Button" OnClientClick="setup_ip(json);" onclick="Button1_Click" />
</div>
</div>
</form>
</body>
</html>
this is .cs code
这是 .cs 代码
protected void Page_Load(object sender, EventArgs e)
{
loc.Text = hdn.Value;
}
protected void Button1_Click(object sender, EventArgs e)
{
string str = hdn.Value;
}
回答by nbrooks
You can post data to the server using an ajax request. This is fairly straightforward since you are already using jquery. See api ref http://api.jquery.com/jQuery.ajax/.
您可以使用 ajax 请求将数据发布到服务器。这相当简单，因为您已经在使用 jquery。请参阅 API 参考http://api.jquery.com/jQuery.ajax/。
$.ajax({
type: "POST",
url: "Page.aspx/method_name",
data: { name: "some data", id: "some more data" }
}).done(function( msg ) {
alert( "Data Saved: " + msg );
});
For this example, in your code-behind for Page.aspx you would have a method named method_name, which takes two parameters: string name, string id. That method would be decorated with the [WebMethod]attribute. Then you can use these however you like in that method.
对于此示例，在 Page.aspx 的代码隐藏中，您将有一个名为 method_name 的方法，它接受两个参数：字符串名称、字符串 id。该方法将使用该[WebMethod]属性进行修饰。然后您可以在该方法中随意使用这些。
