1.webservice方法

[System.Web.Script.Services.ScriptService]
public class TestService : System.Web.Services.WebService
{

[WebMethod]
public string Test(string inputStr)
{
////HttpContext.Current.Response.AddHeader("Access-Control-Allow-Origin", "*");
return "Hello :"+inputStr;
}
}

2.webservice网站web.config配置

 <?xml version="1.0" encoding="utf-8"?>

<!--
  有关如何配置 ASP.NET 应用程序的详细信息，请访问
   http://go.microsoft.com/fwlink/?LinkId=169433
  -->

<configuration>
    <system.web>
      <compilation debug="true" targetFramework="4.0" />
      <customErrors mode="Off"/>
      <webServices>
        <protocols>
          <add name="HttpSoap"/>
          <add name="HttpPost"/>
          <add name="HttpGet"/>
          <add name="Documentation"/>
        </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>
  </system.webServer>

</configuration> 图中框出的2块经测试 缺一不可  

3.jquery ajax调用

function doClick1() {

　　　　　　jQuery.support.cors = true; //IE10以下

$.ajax({
type: "post",
url: "http://xx.com/TestService.asmx/Test",
dataType: 'xml',
data: { inputStr: 'everyone' },
success: function (data) {
alert(data); //xml对象
},
error: function (XMLHttpRequest, textStatus, errorThrown) {
console.log(XMLHttpRequest);
alert('error:' + errorThrown);
}
});
}

 

 From:  http://www.cnblogs.com/xuejianxiyang/p/5369346.html