C#初始化.对象排成阵列 [英] C# Init. Obj. into array

问题描述

我已经创建了一个class(Player)，现在我想让新对象进入数组.我是这样的:

 Player [] Playerarray = 新 Player [ 3 ];  



Form1加载:

 Playerarray [ 0 ] = 新 Player();
Playerarray [ 1 ] = 新 Player();
Playerarray [ 2 ] = 新 Player(); 
 



单选按钮更改事件:

 Playerarray [ 0 ].LabelAktual(); 
 



LabelAktual()只是将标签标准化为玩家名称.



我现在得到一个证明，我没有为播放器初始化对象.

但是我已经将它放入Form1 Load中，我不明白为什么要得到这个例外.

我做错了什么?



谢谢
解决方案
 
可能是因为change事件(由于某种原因)在Load事件之前发生. (也许您在代码中选择了单选按钮作为默认按钮?)

将数组init移到构造函数中，或者再次检查CheckChanged事件中是否有值.最好同时做！
 
 
hi,



i have created a class(Player) and i want now that new object get into an array. I have do it like that:

Player[] Playerarray = new Player[3];




Form1 Load:

Playerarray[0] = new Player();
Playerarray[1] = new Player();
Playerarray[2] = new Player();




Radiobutton change event:

Playerarray[0].LabelAktual();




LabelAktual() just aktualizes a label into the players name.



I get now an exeption, that i didnt initialize an object for playerarary.

But i have done it into Form1 Load, i dont understand why i get this exeption.

What im doing wrong?



Thank you
解决方案
Probably because the change event happened (for some reason) before the Load event. (Perhaps you are selecting a radio button as a default in your code?)

Either move the array init into the Constructor, or double check in the CheckChanged event that you have a value. Preferably, do both!


                        
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