访问嵌套类时出错 [英] error in access to nested classes

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

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