在多个函数之间使用对象 [英] Use object between multiple functions

问题描述

我正在创建垃圾邮件检查器.一种方法扫描电子邮件，另一种方法将已知标志添加到要检查的单词和短语数组中；这两种方法都是 Tester 类的一部分.目前我每个方法都有一个按钮，但是每个事件都会创建自己的垃圾邮件对象.如何让两个事件使用同一个对象，让扫描识别我刚刚添加的标志?

I am creating a spam email checker. One method scans the email, another adds a known flag to an array of words and phrases to check against; both methods are part of Tester class. Currently I have a button per method, however each event creates its own spam object. How do I get both events to use the same object, allowing the scan to recognize the flag I just added?

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace HW8_DR
{
    public partial class Spam_Scanner : Form
    {
        public Spam_Scanner()
        {
            InitializeComponent();
        }

        private void testButton_Click(object sender, EventArgs e)
        {            
            Tester scan = new Tester();
            scan.tester(Convert.ToString(emailBox.Text));
            this.SpamRatingBox.Text = string.Format("{0:N1}%", Tester.countSpam / Tester.wordCount * 100);
            this.WordsBox.Text = Tester.posSpam;
            this.OutputPanal.Visible = true;
            this.pictureBox1.Visible = false;
        }

        private void addButton_Click(object sender, EventArgs e)
        {
            Tester scan = new Tester();
            scan.addSpam(Convert.ToString(addFlagBox.Text));
            this.addFlagBox.Text = "";
        }
    }
}

推荐答案

移动 Tester 变量到类字段，像这样:

Move the Tester variable to the class field, like this:

public partial class Spam_Scanner : Form
{
    Tester scan;

    public Spam_Scanner()
    {
        InitializeComponent();
        scan = new Tester();
    }

    private void testButton_Click(object sender, EventArgs e)
    {            
        scan.tester(Convert.ToString(emailBox.Text));
        this.SpamRatingBox.Text = string.Format("{0:N1}%", Tester.countSpam / Tester.wordCount * 100);
        this.WordsBox.Text = Tester.posSpam;
        this.OutputPanal.Visible = true;
        this.pictureBox1.Visible = false;
    }

    private void addButton_Click(object sender, EventArgs e)
    {
        scan.addSpam(Convert.ToString(addFlagBox.Text));
        this.addFlagBox.Text = "";
    }
}

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