我怎样才能解决这个错误

问题描述：

我试图调用使用AJAXWCF服务，下面是我的代码：我怎样才能解决这个错误

$.ajax({ url: "http://localhost/TestingServices/Service1.svc/GetData" data: "{'value:1}", type: "POST", dataType: "json", contentType: "application/json; charset=utf-8", success: function(data) { alert(data); }, error: function(XMLHttpRequest, textStatus, errorThrown) { alert(textStatus); } });

但在运行后它给了我以下错误：

XMLHttpRequest cannot load http://localhost/TestingServices/Service1.svc/GetData.Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'null' is therefore not allowed access. The response had HTTP status code 404.

灿任何人都可以帮我解决这个问题？

删除的contentType：“应用/ JSON的;字符集= UTF-8 “然后尝试,,, –

请参阅http://stackoverflow.com/questions/33820142/getting-request-doesnt-pass-access-control-check-no-access-control-allow-orig – RRR

现在，我得到dis错误：POST http：//localhost/Wcf/service1.svc/GetData 415（无法处理消息，因为内容t type'application/x-www-form-urlencoded; charset = UTF-8'不是预期的类型'text/xml;字符集= UTF-8' ）。 – tiya

答

尝试2添加HttpProtocols在服务项目的web.config文件

<system.webServer> 
    <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> 
</system.webServer>

答

请试试这个....

$.ajax({ 
type: "GET", 
url: "http://localhost/TestingServices/Service1.svc/GetData", 
dataType: "jsonp", 
success: readData(data), 
error: function (xhr, ajaxOptions, thrownError) { 
    alert(xhr.status); 
    alert(thrownError); 
} 
})

我怎样才能解决这个错误

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