需要实现 C# 计数器

声明:本页面是StackOverFlow热门问题的中英对照翻译,遵循CC BY-SA 4.0协议,如果您需要使用它,必须同样遵循CC BY-SA许可,注明原文地址和作者信息,同时你必须将它归于原作者(不是我):StackOverFlow 原文地址: http://stackoverflow.com/questions/1353935/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me): StackOverFlow

提示:将鼠标放在中文语句上可以显示对应的英文。显示中英文
时间:2020-08-06 15:31:47  来源:igfitidea点击:

need implement C# Counter

c#counter

提问by

I want to make increment and decrement counter. There are two buttons called X and Y. If first press X and then press Y counter should increment. If first press Y and then press X counter should decrement.

我想做递增和递减计数器。有两个按钮称为 X 和 Y。如果先按 X 再按 Y 计数器应增加。如果先按 Y 再按 X 计数器应该递减。

I am not familiar with c#. So can anyone help me please ?? :(

我对 c# 不熟悉。所以有人可以帮我吗??:(

回答by 7wp

You would want to have a variable that you want to keep track of the counter.

您可能想要一个变量来跟踪计数器。

int counter = 0;

If it is a web application then you must store this some where such as session state. then in your increment counter button:

如果它是一个 Web 应用程序,那么您必须将其存储在诸如会话状态之类的地方。然后在您的增量计数器按钮中:

counter++;

and in your decrement counter button do this:

并在您的递减计数器按钮中执行以下操作:

counter--;

回答by Paul Williams

Sounds like you need 2 variables: a counter, and the last button pressed. I'll assume this is a WinForms application, since you did not specify at the time I am writing this.

听起来您需要 2 个变量:一个计数器和最后一个按下的按钮。我假设这是一个 WinForms 应用程序,因为在我写这篇文章的时候你没有指定。

class MyForm : Form
{
    // From the designer code:
    Button btnX;
    Button btnY;

    void InitializeComponent()
    {
        ...
        btnX.Clicked += btnX_Clicked;
        btnY.Clicked += btnY_Clicked;
        ...
    }

    Button btnLastPressed = null;
    int counter = 0;

    void btnX_Clicked(object source, EventArgs e)
    {
        if (btnLastPressed == btnY)
        {
            // button Y was pressed first, so decrement the counter
            --counter;
            // reset the state for the next button press
            btnLastPressed = null;
        }
        else
        {
            btnLastPressed = btnX;
        }
    }

    void btnY_Clicked(object source, EventArgs e)
    {
        if (btnLastPressed == btnX)
        {
            // button X was pressed first, so increment the counter
            ++counter;
            // reset the state for the next button press
            btnLastPressed = null;
        }
        else
        {
            btnLastPressed = btnY;
        }
    }
}

回答by Andrew

Found this on another website:

在另一个网站上找到了这个:

public partial class Form1 : Form
{
        //create a global private integer 
        private int number;

        public Form1()
        {
            InitializeComponent();
            //Intialize the variable to 0
            number = 0;
            //Probably a good idea to intialize the label to 0 as well
            numberLabel.Text = number.ToString();
        }
        private void Xbutton_Click(object sender, EventArgs e)
        {
            //On a X Button click increment the number
            number++;
            //Update the label. Convert the number to a string
            numberLabel.Text = number.ToString();
        }
        private void Ybutton_Click(object sender, EventArgs e)
        {
            //If number is less than or equal to 0 pop up a message box
            if (number <= 0)
            {
                MessageBox.Show("Cannot decrement anymore. Value will be  
                                                negative");
            }
            else
            {
                //decrement the number
                number--;
                numberLabel.Text = number.ToString();
            }
        }
    }