使用C#编写一些代码的帮助，以在表单之间使用信息. [英] Help with writing some code in C# To use information between forms.

问题描述

我只会用语言说出来.

如果选中了form2上的复选框，并且最大化了form1.
在form1上，执行:

I''ll just say it in words.

If checkbox on form2 is checked and form1 is maximized.
on form1, do:

if (shown == true)
            {
                telep.Location = new Point(0, 26);
                telep.Size += new System.Drawing.Size(0, 80);
                shown = false;
            }
            else if (shown == false)
            {
                shown = false;
            }

否则，什么也不做.

**显示的是布尔值.

otherwise, do nothing.

**Shown is a Boolean value.

推荐答案

什么，基本逻辑有问题?

这什么都不做:

What, problems with elementary logic?

This does nothing:

if (shown == false) {
    shown = false;
}

if (shown == true)和if (shown == false)都是荒谬的:您在拥有布尔值的同时创建布尔值；同样，当您检查第一个条件时，再次检查"else if"是荒谬的，因为布尔变量只有两个值.这两个问题似乎使您无法理解.

重要说明:
可为空类型bool?的变量具有三个值:null，false和true.在这种情况下，您的代码将具有一定的意义.

您应该使用

Both if (shown == true) and if (shown == false) are ridiculous: you create Boolean value while you already have Boolean value; also, when you checked first condition, checking with "else if" again is ridiculous, as the Boolean variable has only two values. Both problems look like you fail to understand it.

Important note:
The variable of the nullable type bool? has three values: null, false and true. You code would have some sense in this case.

You should use

if (shown)
   DoSomething();
else
   DoSomethingElse();

但是，对于您的情况，"else"部分没有任何意义，正如我在第一个代码示例中已经解释的那样.

同样，您不显示声明"shown"的位置；它应该是表单字段成员.

剩下的问题是在片段中硬编码的立即大小/位置常量.这不好.此外，您可能还想在表单未显示时更改大小/位置.这样，您要做的就是:

However, the "else" part makes no sense in your case as I already explained in my first code sample.

Also, you don''t show where "shown" is declared; it should be a form field member.

The remaining problem is immediate size/location constants hard-coded in your fragment; this is bad. Besides, you probably wanted to change the size/location when the form is not yet shown. In this way, what you had to do would be this:

if (!shown) {
   shown = false;
   //change location/size here
}
//nothing else here

最后:问题看起来微不足道；但这很简单，但是我碰巧为首次"问题提供了一种非常通用的解决方案，主要是为了娱乐和演示一些相当先进的技术:
希望您在这里……只有一次 [

Finally: the problem looks trivial; and it is trivial, however, I happened to offer a very universal solution to the "first time" problem, mostly for fun and demonstration of some quite advanced techniques:
Wish You Were Here… Only Once[^]

—SA

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