Question

我编写了这段代码，用于在VB C＃中将整数转换为十六进制数。在运行代码时，按下转换按钮后，程序停止响应，我每次都必须使用任务管理器关闭它。我无法弄清楚它为什么会发生。有什么帮助吗？

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 WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        public char value(byte x)
        {
            char[] arr = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
            return arr[x];
        }

        public void IntToHex(int num)
        {
            string HexString=" ";
            HexString = HexString.Trim();
            while(num>=0)
            {

                HexString+=value((byte)(num%16));
                num/=16;
            }
            HexText.Text += HexString;
            HexText.Enabled = false;
            Replay.Enabled = true;
            Quit.Enabled = true;
        }

        public void ConvertButton_Click(object sender, EventArgs e)
        {
            Int32 Integer;
            if (Int32.TryParse(IntegerText.Text, out Integer))
            {
                ConvertButton.Enabled = false;
                IntToHex(Integer);
            }
            else
            {
                HexText.Text = "Invalid Input.";
            }
        }

        public void Replay_Click(object sender, EventArgs e)
        {
            IntegerText.Text = null;
            HexText.Text = null;
            IntegerText.Enabled = true;
            Replay.Enabled = false;
            Quit.Enabled = false;
            HexText.Enabled = false;
            ConvertButton.Enabled = true;
        }

        public void Quit_Click(object sender, EventArgs e)
        {
            this.Close();
        }
    }
}

Answer 1

为什么不使用

int num = 42;
string hex = num.ToString("X");

Answer 2

似乎下面的函数有无限循环。

public void IntToHex(int num)
    while(num>=0)
    {
        num/=16;   // never set num smaller than 0
    }

将Int转换为十六进制

2 个答案: