通过方法调用将随机数返回给文本框.请建议

本文关键字：文本 返回 方法 调用 随机数 | 更新日期: 2023-09-27 18:13:34

这是基于一个控制台程序，我正试图为它做一个GUI。

请查看firstNumber_Click和Arithmetic firstRandomNumber()

有机会我可以得到一个解释，为什么它不返回随机数到文本框?

算术 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace CAI_GUI
{
    class Arithmetic
    {
        public int firstNumber;
        public int secondNumber;
        public Arithmetic(int _firstNumber, int _secondnumber)
        {
            firstNumber = _firstNumber;
            secondNumber = _secondnumber;
        }
        public Arithmetic()
        {
        }
        public int firstRandomNumber()
        {
            Random rnd = new Random();
            firstNumber = rnd.Next(0, 9);
            return firstNumber;
        }
        public int secondRandomNumber()
        {
            Random rnd = new Random();
            secondNumber = rnd.Next(0, 9);
            return secondNumber;
        }
        public int FirstNumber
        {
            get
            {
                return firstNumber;
            }
            set
            {
                firstNumber = value;
            }
        }
        public int SecondNumber
        {
            get
            {
                return secondNumber;
            }
            set
            {
                secondNumber = value;
            }
        }
    }
}

Form4 

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace CAI_GUI
{
    public partial class Form4 : Form
    {
        Arithmetic A1 = new Arithmetic();
        public Form4()
        {
            InitializeComponent();
        }
        private void Form4_Load(object sender, EventArgs e)
        {
        }
        private void textBox1_TextChanged(object sender, EventArgs e)
        {
        }
        private void textBox2_TextChanged(object sender, EventArgs e)
        {
            A1.secondRandomNumber();
        }
        private void button2_Click(object sender, EventArgs e)
        {
            Environment.Exit(0);
        }
        private void firstNumber_Click(object sender, EventArgs e)
        {
            int first = Convert.ToInt32(num1.Text);
            num1.Text = A1.firstRandomNumber().ToString();
        }
    }
}

通过方法调用将随机数返回给文本框.请建议

我认为它不工作，因为行int first = Convert.ToInt32(num1.Text);，因为它无法转换，试试这个。

private void firstNumber_Click(object sender, EventArgs e)
    {
        num1.Text = A1.firstRandomNumber().ToString();
    }
相关文章：