Use ajax to verify whether the order number exists in the database

This time I will bring you how to use ajax to verify whether the order number exists in the database, and use ajax to verify whether the order number exists in the database. What are the precautions? The following is a practical case, let's take a look.

The example in this article describes the method of ajax synchronously verifying whether the order number exists. Share it with everyone for your reference, the details are as follows:

//保存前执行的方法,ajax同步调用后台验证包裹单号是否存在
function doBeforeSave(){
  var packageCode=document.getElementById("packageCode").Value;
  var temp=false;
  if(packageCode!=""){
    $.ajax({
     url: "${ctx}/finance/packageManagement!parcelsWhetherExists.do", //接收页面
     type: 'post',  //POST方式发送数据
     async: false,  //ajax同步
     data:{packageCode:packageCode},
     success: function(result) {
      temp = eval(result.result);
     }
    });
  }
  if(!temp){
   alert("包裹单号已存在！");
   toft.resetForm("addDataForm");//清空表单
   toft.id("packageCode").focus();
  }
  return temp;
}

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!

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