访问嵌套类时出错 | 访问嵌套类时出错

本文介绍了访问嵌套类时出错的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

大家好。代码是：

hi all. the code is:

 public class PersonelInfoAndEmploymentInfo
    {
        public employmentInfo _empinfo{set;get;}
        public PersonelInfo _pinfo { set; get; }
    }
public class PersonelInfo
{
//some fields
}
public class employmentInfo
{
//some fields
}

//access from a winform
PersonelInfoAndEmploymentInfo person = new PersonelInfoAndEmploymentInfo();
person._empinfo.jobLocation = "asdasd";

//error:Object reference not set to an instance of an object.

推荐答案

public class PersonelInfoAndEmploymentInfo
    {
        public employmentInfo _empinfo{set;get;}
        public PersonelInfo _pinfo { set; get; }
        public PersonelInfoAndEmploymentInfo()
        {
           _empinfo = new employmentInfo();
           _pinfo   = new PersonelInfo();
        }
    }

像这样改变你的班级

change your class like this

这篇关于访问嵌套类时出错的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！