C# 如何检查是否在另一个表单上选中了复选框？
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C# How can I check to see if a checkbox is checked on another form?
提问by Jamie
I'm using C# and I'd like to check to see if a checkbox on the main form is checked and if so run some code, the problem is I'm in a class file (file with no form, is class file correct?). What is the easiest way to do this?
我正在使用 C#，我想检查主窗体上的复选框是否被选中，如果选中，则运行一些代码，问题是我在一个类文件中（没有表单的文件，类文件是否正确） ？）。什么是最简单的方法来做到这一点？
Thanks Jamie
谢谢杰米
采纳答案by Adam Robinson
The best option is to create a booleanproperty on the Form that exposes the Checkedvalue of the CheckBox.
最好的办法是创建一个boolean是公开的形式对财产Checked的价值CheckBox。
public bool OptionSelected
{
get { return checkBox.Checked; }
set { checkBox.Checked = value; } // the set is optional
}
回答by Jon Skeet
You need a reference to the form, and the form has to expose the checkbox (or a property which consults the checkbox).
您需要对表单的引用，并且表单必须公开复选框（或查询复选框的属性）。
There's no difference between UI programming and non-UI programming in this respect. How would ask for the Nameproperty of a Personinstance from a different class? You'd get a reference to the instance, and ask for the relevant property.
UI 编程和非 UI 编程在这方面没有区别。如何从不同的类中请求实例的Name属性Person？您将获得对该实例的引用，并请求相关属性。
So you definitely need a reference to the form, and then it's one of:
所以你肯定需要对表单的引用，然后它是以下之一：
bool checked = form.IsAdultCheckbox.Checked;
bool checked = form.IsAdult;
(Where the IsAdultproperty would return someCheckbox.Checked.)
（IsAdult财产将返回的地方someCheckbox.Checked。）
The actual property names may be wrong here (e.g. Checkedmay not return a bool) but I hope you get the idea.
此处的实际属性名称可能是错误的（例如Checked可能不会返回 a bool），但我希望您明白这一点。
回答by Paul Williams
Can you define an interface with a property, have the form implement the interface and return true if the checkbox is checked, and pass an instance of this interface to your class?
您能否定义一个带有属性的接口，让表单实现该接口并在选中复选框时返回 true，并将此接口的实例传递给您的类？
For example:
例如：
interface IMyFormFlag
{
bool IsChecked { get; }
}
public class MyForm : Form, IMyFormFlag
{
CheckBox chkMyFlag;
bool IsChecked { get { return chkMyFlag.Checked; } }
}
public class MyObject
{
public void DoSomethingImportant(IMyFormFlag formFlag)
{
if (formFlag.IsChecked)
{
// do something here
}
}
}
回答by Magical Mayhem 007
Personally, I don't like using set or get. I did it like this:
就个人而言，我不喜欢使用 set 或 get。我是这样做的：
if (checkBox.IsChecked.Equals(true))
{
//insert code here
}
回答by Amr Angry
you can use this it works fine for me
你可以使用它，它对我来说很好用
if (Convert.ToBoolean(CheckBox1.IsChecked))
{
MessageBox.Show("true");
}
else
{
MessageBox.Show("false");
}
