Object reference not set to an instance of an object.请问,

来源：学生作业帮助网编辑：作业帮时间：2024/05/20 23:46:24

简单地说就是你调用的对象是空的
我用的是C#,
假如你这样用：
定义一个窗体 From A;（这里只是定义没有实例化）
然后没有实例化就调用A的show方法：A.show(),这样就会报楼主说的那个错了,
就好比我宣称要学英语,还没有动手开始学,领导就叫我去做同声翻译,这样肯定会出错啦

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