使用 JQuery 调用 WebMethod [英] Using JQuery to call a WebMethod
问题描述
我无法通过 JQuery 调用进入我的 Search WebMethod.也许有人可以帮助我指明正确的方向.
I am having trouble getting inside my Search WebMethod from my JQuery call. Maybe someone could help to point me in the right direction.
我还将所有内容打包成一个 zip 文件，以防有人想仔细查看.
I also packed up everything into a zip file incase someone wants to check it out for a closer look.
http://www.filedropper.com/jsonexample
谢谢瑞恩
<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default.aspx.vb" Inherits="_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>JSON Example</title>
<script type="text/javascript" language="JavaScript" src="jquery-1.3.1.min.js"></script>
<script type="text/javascript" language="javascript">
function Search() {
var search = $("#searchbox").val();
var options = {
type: "POST",
url: "Default.aspx/Search",
data: "{text:" + search + "}",
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function(msg) {
alert('Success!');
}
};
$.ajax(options);
}
</script>
</head>
<body>
<form id="form1" runat="server">
<input type="text" id="searchbox" size="40" />
<a href="#" onclick="Search()" id="goSearch">Search</a>
<br />
<div id="Load" />
</form>
</body>
</html>
这里是 default.aspx 的代码
And here is the code behind for the default.aspx
Imports System.Data
Imports System.Web.Services
Imports System.Web.Script.Serialization
Partial Class _Default
Inherits System.Web.UI.Page
<WebMethod()> _
Public Shared Function Search(ByVal text As String) As IEnumerable
Return "test"
End Function
End Class
推荐答案
要解决这样的问题，首先要在 Firebug 中观看.
To solve a problem like this, the first thing to do is watch it in Firebug.
如果您单击搜索"链接并在 Firebug 的控制台中查看 POST 请求/响应，您会看到它抛出了 500 服务器错误:无效的 JSON 原语.
If you click the "Search" link and watch the POST request/response in Firebug's console, you'll see it's throwing a 500 server error: Invalid JSON Primitive.
这是因为数据"JSON 文本中的键/值标识符没有被引用.第 17 行应该是:
The reason for that is because the key/value identifiers in your "data" JSON literal aren't quoted. Line 17 should be:
data: "{'text':'" + search + "'}",
然后，一切都会按预期进行.
Then, all will work as expected.
注意:建议的数据 { test: search } 不起作用.如果您为 jQuery 提供实际的 JSON 文字而不是字符串，它会将其转换为 test=search 和 POST 的键/值对，而不是 JSON.这也会导致 ASP.NET AJAX ScriptService 或 PageMethod 抛出 Invalid JSON Primitive 错误.
Note: The suggested data { test: search } will not work. If you provide jQuery with an actual JSON literal instead of a string, it will convert that into a key/value pair of test=search and POST that instead of the JSON. That will also cause an ASP.NET AJAX ScriptService or PageMethod to throw the Invalid JSON Primitive error.
这篇关于使用 JQuery 调用 WebMethod的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
