jquery ajax跨域请求webservice webconfig配置

<configuration>
    <system.web>
      <compilation debug="true" targetFramework="4.0" />
      <webServices>
        <protocols>
          <add name="HttpGet"/>
          <add name="HttpPost"/>
        </protocols>
      </webServices>
      
    </system.web>
  <system.webServer>
    <httpProtocol> 
    <customHeaders> 
      <add name="Access-Control-Allow-Methods" value="OPTIONS,POST,GET"/> 
      <add name="Access-Control-Allow-Headers" value="x-requested-with,content-type"/> 
      <add name="Access-Control-Allow-Origin" value="*" /> 
    </customHeaders> 
  </httpProtocol> 
  <modules>
    <add name="MyHttpModule" type="WebServiceDemo.MyHttpModule"/>
  </modules>
  </system.webServer>
</configuration>

如果想选定的网站可能跨域访问，修改配置如下

<add name="Access-Control-Allow-Origin" value="http://domain1.com, http://domain2.com" />

JS代码：

function call2() {
            $.support.cors = true;
            $.ajax({
                url: "http://localhost:21179/WebService1.asmx/Test",
                type: "POST",
                dataType: "json",
                contentType: 'application/json',
                
                data: "{'user':{'Name':'aaa','Sex':'男','ID':1}}",
                
                success: function (d) {
                    alert("success! ");
                },
                error: function (e) {
                }
            });
        }

用的时候要注意，这样用可能有风险，具体什么风险还不清楚!!!

有一篇文章可以作为参考

http://www.coderssource.com/?tag=/Access-Control-Allow-Origin

转载：http://blog.csdn.net/liyifei21/article/details/17509735