Ajax 方法调用 [英] Ajax method call
问题描述
我试图在我的代码中使用 Jquery 和 Ajax 调用一个简单的方法.但是我每次都会收到 404 not found 异常.不幸的是，这是一个网络表单解决方案.所以我没有 MVC 的所有好处:(
I am trying to call a simple method in my code behind using Jquery with Ajax. But I get a 404 not found exception everytime. Unfortunately this is a web forms solution. So I dont have all the perks of MVC :(
它确实进入了 javascript 方法并发出警报，但不会进入我的 c# 方法.我之前使用这个 Jquery 方法的经验是在一个 MVC 网站上.它与网络表单网站兼容吗?
It does get into the javascript method and gives the alert but won't go into my c# method. My previous experience of using this Jquery method is in an MVC website. Is it compatible with webforms sites?
我的 Javascript 是:
My Javascript is:
$(document).ready(function() {
$('#btn_<%=UserStuff.tag %>').click(function() {
var value = $('#<%#Eval("tag") %>twink').val();
something(value);
});
});
function something(theval) {
alert(theval);
$.ajax({
type: "POST",
url: "/Default.aspx/MyMethod?something=" + theval,
data: "{}",
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function(msg) {
alert(msg);
}
});
}
}
我的 C# 代码是:
public JsonResult MyMethod(string something)
{
JsonResult ret = new JsonResult();
return ret;
}
提前致谢.
推荐答案
你的方法返回 JsonResult.这是特定于 MVC 的，您不能在 webforms 应用程序中使用它.
Your method returns JsonResult. This is MVC specific and you cannot use it in a webforms application.
如果您想在经典的 WebForms 应用程序中调用隐藏代码中的方法，您可以使用 PageMethods:
If you want to call methods in the code behind in a classic WebForms application you could use PageMethods:
[WebMethod]
public static string GetDate()
{
return DateTime.Now.ToString();
}
然后调用方法:
$.ajax({
type: 'POST',
url: 'PageName.aspx/GetDate',
data: '{ }',
contentType: 'application/json; charset=utf-8',
dataType: 'json',
success: function(msg) {
// Do something interesting here.
}
});
这是我为你写的一个完整的工作示例:
And here's a full working example I wrote for you:
<%@ Page Language="C#" %>
<%@ Import Namespace="System.Web.Services" %>
<script type="text/C#" runat="server">
[WebMethod]
public static string SayHello(string name)
{
return "Hello " + name;
}
</script>
<!DOCTYPE html>
<html>
<head>
<title></title>
<script type="text/javascript" src="/scripts/jquery-1.4.1.js"></script>
<script type="text/javascript">
$(function () {
$.ajax({
type: 'POST',
url: 'default.aspx/sayhello',
data: JSON.stringify({ name: 'John' }),
contentType: 'application/json; charset=utf-8',
dataType: 'json',
success: function (msg) {
// Notice that msg.d is used to retrieve the result object
alert(msg.d);
}
});
});
</script>
</head>
<body>
<form id="Form1" runat="server">
</form>
</body>
</html>
PageMethods 不限于简单的参数类型.您可以使用任何类型作为输入和输出，它会自动进行 JSON 序列化.
PageMethods are not limited to simple argument types. You could use any type as input and output, it will be automatically JSON serialized.
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