Question

是否想知道int值增加5或特定值是否可以做些什么？如果是这样，怎么办？

例如：

int intExample = 0;

if(intExample has incremented/increased by 5 or specific value) {

doSomething();

}

只要增加5或特定值，它就会调用doSomething（）方法。

谢谢！

Answer 1

使用字段将很困难，但是使用属性可以分别控制getter和setter并可以在事件发生之前对其进行处理。这是一个差异为5且特定值为99的示例。

public class Foo
{
    private int intExample = 0;
    public int IntExample 
    {
        get { return intExample ; }
        set 
        {
            // if the value trying to be set is 5 lower or higher or is 99 call the method
            if((value == intExample - 5) ||
               (value == intExample + 5) ||
               (value == 99))
            {
                DoSomething();
            }

            // set the value in the private field
            intExample = value;
        }
    }

    private void DoSomething()
    {
        // do something here
    }
}

以及使用方法的示例是

// create the class
Foo foo = new Foo();

// set value of 32, this will change it but will not trigger as the default is 0 and is not 5 higher or lower or value of 99
foo.IntExample = 32;

// this will trigger as it's 5 more
foor.IntExample = 37;

Answer 2

您可以将属性与EventEmmitters一起使用

private int _prop1;

//#1
public event System.EventHandler PropertyChanged;

//#2
protected virtual void OnPropertyChanged()
{ 
     if (PropertyChanged != null) PropertyChanged(this,EventArgs.Empty); 
}

public int Prop1
{
    get
    {
         return _prop1;
    }

    set
    {
         //#3
         _prop1=value;
         OnPropertyChanged();
    }
 }

C＃如果int值已增加/增加5或特定值，请执行某些操作

2 个答案: