ajax 异步请求webservice(XML格式)

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function callAjaxWebservice(){                 alert("call ajax");                  try {                      $.ajax({                          type: "POST",  //访问WebService使用post方式请求                          contentType: "text/xml;utf-8",//使用的xml格式的                          url: "http://192.168.6.176:8899/arch/entry/services/CheckLogin", //调用WebService的地址和方法名称组合                          data: getPostData(),  //这里是要传递的参数                          dataType: "xml",  //参数类型为xml                          success: function (result) {                              alert("call succ:"+result);                          },                          error: function(res,err){                             alert("call failed:"+res.responseText);                          }                      })                  }                  catch (ex) {                      alert(ex);                  } }

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function getPostData(){     var data="<soapenv:Envelope xmlns:soapenv=\"http://schemas.xmlsoap.org/soap/envelope/\" xmlns:ser=\"http://service.checklogin.assetpda.business/\">"+           "<soapenv:Header/>" +           "<soapenv:Body>"  +               "<ser:validUser>" +                                                               "<arg0>wu</arg0><arg1>1234</arg1>" +                "</ser:validUser>" +            "</soapenv:Body>" +           "</soapenv:Envelope>";         return data; }