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首先需要在原api接口的程序中在web.config添加如下节点(在<system.webServer>节点下)
<!--准许跨域请求--> <httpProtocol> <customHeaders> <add name="Access-Control-Allow-Origin" value="*" /> <add name="Access-Control-Allow-Headers" value="Content-Type" /> <add name="Access-Control-Allow-Methods" value="GET, POST, PUT, DELETE, OPTIONS" /> </customHeaders> </httpProtocol>
在原api接口程序中的Global.asax中添加如下代码
GlobalConfiguration.Configuration.Formatters.XmlFormatter.SupportedMediaTypes.Clear();
具体是什么原因请自行百度
然后需要在原api继承ApiController的控制器中添加如下代码
//准许跨域请求 public string Options() { return null; // HTTP 200 response with empty body }
然后该项目发布就可以了
其它项目调用的时候这里举2个例子,一个是前台ajax调用,一个是后台调用
1.前台调用
<script src="/jq/jquery-1.7.min.js"></script> <script type="text/javascript"> window.onload = function get() { $.ajax({ type: ‘GET‘, url: ‘http://网址/api/user/getInfo‘, dataType: ‘json‘, success: function (data, textStatus) { //alert(data.Uid + " | " + data.UserName + "|" + data.Age); }, error: function (xmlHttpRequest, textStatus, errorThrown) { } }); } </script>
2.后台调用
public static string request(string url) { string strURL = url; System.Net.HttpWebRequest request; request = (System.Net.HttpWebRequest)WebRequest.Create(strURL); request.Method = "GET"; System.Net.HttpWebResponse response; response = (System.Net.HttpWebResponse)request.GetResponse(); System.IO.Stream s; s = response.GetResponseStream(); string StrDate = ""; string strValue = ""; StreamReader Reader = new StreamReader(s, Encoding.UTF8); while ((StrDate = Reader.ReadLine()) != null) { strValue += StrDate + "\r\n"; } return strValue; }
protected void Page_Load(object sender, EventArgs e) { string t = request("http://网址/api/user/getInfo"); JsonData js = JsonMapper.ToObject(t); String name = (String)js["UserName"]; Response.Write(name); //return Content(name); }
关于JsonData这里还需要添加一个引用LitJson.dll
其实后台调用的话不需要在web.config和控制器中添加代码,直接就能调用,但需要在Global.asax中做配置
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原文地址:http://www.cnblogs.com/dushaojun/p/5358525.html