Uncaught Error: Error calling method on NPObject.-蒲公英云

Uncaught Error: Error calling method on NPObject.

快来打我* 2022-06-07 03:44 321阅读 0赞

1、错误描述

Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user's experience. 
For more help, check http://xhr.spec.whatwg.org/.
获取到第一个值：undefined
Uncaught Error: Error calling method on NPObject.
Uncaught 
Error: Error calling method on NPObject.

2、错误原因

function windowOnload() {
    Report.LoadFromURL("student.grf?date="+(new Date().getTime()));
    $.ajax({
        url:"param/isPrint",
        type:"get",
        dataType:"json",
        async:false,
    }).done(function(resp){
       if(dt.success==false){
            return;
       }
       var isPrint=resp.isPrint;
       $.ajax({
            url:"student/stu/findStu",
            type:"get",
            dataType:"json",
            data:{},
            async:false
        }).done(function(data){
           if(!data){
               return;
           }
           var report = JSON.stringify(data);
           Report.LoadDataFromAjaxRequest(report,"application/json;charset=UTF-8");
           Report.Print(isPrint);
        });
    });
}
    利用Grid++Report制作报表时，是否打开打印窗口，利用一个参数isPrint来控制；当isPrint=true，显示打印窗口，否则不显示。但是，如果查询出来的结果没有这个参数，并且直接在Print(isPrint)使用，这时会报错Error calling method on NPObject

3、解决办法

 在Report.Print(isPrint)使用这个参数前，添加判断
function windowOnload() {
    Report.LoadFromURL("student.grf?date="+(new Date().getTime()));
    $.ajax({
        url:"param/isPrint",
        type:"get",
        dataType:"json",
        async:false,
    }).done(function(resp){
       if(dt.success==false){
            return;
       }
       var isPrint=resp.isPrint;
       $.ajax({
            url:"student/stu/findStu",
            type:"get",
            dataType:"json",
            data:{},
            async:false
        }).done(function(data){
           if(!data){
               return;
           }
           var report = JSON.stringify(data);
           Report.LoadDataFromAjaxRequest(report,"application/json;charset=UTF-8");
           Report.Print(isPrint?true:false);
        });
    });
}