The XDomainRequest object has these types of members: Events Methods Properties Events The XDomainRequest object has these events. Event Description onerror Raised when there is an error that prevents the completion of the cross-domain request. onloa…
Browser security prevents a web page from making AJAX requests to another domain. This restriction is called the same-origin policy, and prevents a malicious site from reading sentitive data from another site. However, sometimes you might want to let…
Introduction This tutorial demonstrates CORS support in ASP.NET Web API. We’ll start by creating two ASP.NET projects – one called “WebService”, which hosts a Web API controller, and the other called “WebClient”, which calls WebService. Because the t…
Cross-origin resource sharing (CORS) is a mechanism that allows many resources (e.g., fonts, JavaScript, etc.) on a web page to be requested from anotherdomain outside the domain from which the resource originated.[1] In particular, JavaScript's AJAX…
1. Client browser short polling The most simple solution, client use Ajax to sends a request to the server in a short period circle, the server returns the latest data, then client according to the received data to update the UI. The advantage is si…
几年前,网站开发者都因为ajax的同源策略而撞了南墙.当我们惊叹于XMLHttpRequest对象跨浏览器支持所带来的巨大进步时,我们很快发现没有一个方法可以使我们用JavaScript实现请求跨域访 问,对此我们哀叹不已.每个人在他们自己的网站上建立代理(which was the onset of a new host of open redirect problems)来摆脱这种限制.虽然开发者利用服务器代理和其它技巧避开了这种限制,而在社区的抗议者允许ajax在本地跨域调用.许多人还没意…
在做查询时,经常遇到一类需求.请看下面的SQL语句查询 SELECT * FROM Company WHERE CompanyCode='Kingston' AND Suspended='N' AND DbServer='James\SQLEXPRESS' 这里有三个条件,在界面中,也就是我们需要增加三个控件来供用户输入值,再拼接成SQL发送到服务器. 再来看一下界面中的情况,根据客户名称,下单日期,是否过帐,是否完成4个选项来读取发票信息 点击Refresh按钮之后,产生的SQL条件,可能…
