这让我发疯,我已经浏览了我在 Google 和这里看到的每一篇文章,两天后,101 个变体之后我仍然没有进一步前进。
成功 201 运行良好,我收到绑定(bind)项目的警报。 404 根本不起作用,无论我尝试什么,ErrorDesc 总是未定义。我已经让它可以用固定字符串命中这个 404 函数,但我希望用户知道为什么会出现错误。
我已经使用fiddler来查看请求和响应。看起来不错,请求和响应都是格式良好的 JSON:
原始请求:
{"Bedrooms":"3","BuildingsAD":"Yes","BuildingsMD":"No","BulidingSI":"100000","ContentsAD":"No","ContentsMD":"No","ContentsPOL":"No","ContentsSI":"5000","EffectiveDate":"03/10/2012 23:40:10","EL":"N","MD":"No","NCD":"1","POL":"No","PropType":"Terraced","RiskPostcode":"SW19 1TS","SchemeRef":"20","TA":"No","TenantTheft":"No","TenantType":"Professional","Theft":"No","TransactionDate":"03/10/2012 23:40:10","VolExcess":"250","YearBuilt":"2000 +","ErrorDesc":"123"}
Raw Response:
{"RatingId":"f5733e9d-bc9d-4026-8d5f-ce4f750a3a42","SchemeRef":"20","EffectiveDate":"03/10/2012 23:40:10","TransactionDate":"03/10/2012 23:40:10","Bedrooms":"3","BuildingsAD":"Yes","BuildingsMD":"No","BulidingSI":"100000","ContentsAD":"No","ContentsMD":"No","ContentsPOL":"No","ContentsSI":"5000","EL":"N","MD":"No","NCD":"1","POL":"No","PropType":"Terraced","RiskPostcode":"SW19 1TS","TA":"No","TenantTheft":"No","TenantType":"Professional","Theft":"No","VolExcess":"250","YearBuilt":"2000 +","Error":true,"ErrorDesc":"Rating Sheet not found"}
<script type="text/javascript">
function CalcRating() {
//create a Json object based on data entered by user
var RatingItems = {
AD: $("#AD").val(),
AdminFee: $("#AdminFee").val(),
Bedrooms: $("#Bedrooms").val(),
BuildingsAD: $("#BuildingsAD").val(),
BuildingsMD: $("#BuildingsMD").val(),
BuildingsPremium: $("#BuildingsPremium").val(),
BulidingSI: $("#BulidingSI").val(),
ContentsAD: $("#ContentsAD").val(),
ContentsMD: $("#ContentsMD").val(),
ContentsPOL: $("#ContentsPOL").val(),
ContentsPremium: $("#ContentsPremium").val(),
ContentsSI: $("#ContentsSI").val(),
EffectiveDate: $("#EffectiveDate").val(),
EL: $("#EL").val(),
IPT: $("#IPT").val(),
MD: $("#MD").val(),
NCD: $("#NCD").val(),
POL: $("#POL").val(),
PropType: $("#PropType").val(),
RatingId: $("#RatingId").val(),
RiskPostcode: $("#RiskPostcode").val(),
SchemeRef: $("#SchemeRef").val(),
TA: $("#TA").val(),
TenantTheft: $("#TenantTheft").val(),
TenantType: $("#TenantType").val(),
Theft: $("#Theft").val(),
TransactionDate: $("#TransactionDate").val(),
TotalPremium: $("#TotalPremium").val(),
VolExcess: $("#VolExcess").val(),
YearBuilt: $("#YearBuilt").val(),
ErrorDesc: "123"
};
//call jQuery Ajax method which calls Json.stringify method to convert
//the Json object into string and send it with post method
$.ajax({
url: "/api/qsletpropertyom",
data: JSON.stringify(RatingItems),
type: "POST",
contentType: "application/json;charset=utf-8",
statusCode: {
201: function (result) {
alert("Total Premium: " + result.TotalPremium + ", Total Buildings Premium " + result.BuildingsPremium + ", Total Contents Cover " + result.ContentsPremium + ", Admin Fee " + result.AdminFee);
},
404: function (result1) {
alert(result.ErrorDesc);
},
500: function (result2) {
alert("Unknown Error");
}
}
});
}
请让我知道我的方法的错误!!
最佳答案
首先,当您可能期望 result1.ErrorDesc
时,您正在使用 result.ErrorDesc
- 但我猜这只是一个拼写错误。
其次,如果我没理解错的话,你想在ajax遇到404(页面未找到)时向用户显示错误描述吗?如果是这样,您很可能无法执行此操作,因为没有数据传递到您的 404 处理程序。
也许您正在寻找其他东西,例如 ajax 的 error
选项 (http://api.jquery.com/jQuery.ajax/)。
来自 jQuery 文档:error
“请求失败时调用的函数。该函数接收三个参数:jqXHR(在 jQuery 1.4.x 中为 XMLHttpRequest)对象、描述类型的字符串发生的错误和可选的异常对象(如果发生)。第二个参数(除了 null 之外)的可能值为“timeout”、“error”、“abort”和“parsererror”。当发生 HTTP 错误时,errorThrown 接收HTTP 状态的文本部分,例如“未找到”或“内部服务器错误”。从 jQuery 1.5 开始,错误设置可以接受函数数组。每个函数将依次调用。注意:此处理程序不是调用跨域脚本和 JSONP 请求。”
$.ajax({
url: "/api/qsletpropertyom",
data: JSON.stringify(RatingItems),
type: "POST",
contentType: "application/json;charset=utf-8",
error: function(jqXHR, textStatus, errorThrown) {
// textStatus will contain "Not Found" for 404 errors
}
});
编辑:
显然,statusCode
映射定义中使用的 404 处理程序(如您所做的那样)获取 3 个参数,就像 error
选项一样。这是工作示例:http://jsfiddle.net/QsHdV/2/
请注意,您获得的第一个参数是 jquery XHR 对象,而不是某些结果数据。
关于javascript - Json 响应未定义,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/12725968/