[英]ASP.NET web service returning xml instead of json
这是我的代码;
$(document).ready(function () {
$('#btnAddCat').click(function () {
var cn = $('#txtCategoryName').val();
alert(cn);
$.ajax({
type: 'Post',
url: "../_ws/news.asmx/InsertCategory",
data: { catName: + cn },
contenttype: 'application/json; charset=utf-8',
datatype: 'json',
async: false,
success: function (msg) {
alert(msg);
},
error: function (msg) {
alert('failure');
alert(msg);
}
});
});
});
这是news.asmx web服务中的代码
Imports System.Web
Imports System.Web.Services
Imports System.Web.Services.Protocols
Imports System.Web.Script.Services
' To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line.
'<System.Web.Script.Services.ScriptService()> _
<WebService(Namespace:="http://tempuri.org/")> _
<WebServiceBinding(ConformsTo:=WsiProfiles.BasicProfile1_1)> _
<Global.Microsoft.VisualBasic.CompilerServices.DesignerGenerated()> _
Public Class News
Inherits System.Web.Services.WebService
<WebMethod()> _
<ScriptMethod(ResponseFormat:=ResponseFormat.Json)>
Public Function InsertCategory(ByVal catName As String) As String
Dim newid = KTOEOS.NewsCategories.InsertCategory(catName)
Return "{'c':" & newid & "}".ToString
End Function
End Class
返回的结果是:
<?xml version="1.0" encoding="utf-8"?>
<string xmlns="http://tempuri.org/">{'c':21}</string>
如果我改变jQuery部分来阅读;
...
data: { catName: + cn },
...
然后我收到一个错误:
System.InvalidOperationException: Missing parameter: catName
我究竟做错了什么?
可能是因为你习惯于VB不区分大小写。
尝试这些线(注意国会大厦T):
contentType: 'application/json; charset=utf-8',
dataType: 'json',
从您的Web服务代码中取消注释以下行。
<System.Web.Script.Services.ScriptService()>
为什么要将async
设置为false
? 这将完全停止浏览器,直到服务器响应。
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