form1.cs

ASCII字符查询工具带源码的方便查询省得大家查表了

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


namespace ASCII_Code
{
    public partial class MainWindow : Form
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            //  退出程序的指令
            Application.Exit();
        }

        private void button2_Click(object sender, EventArgs e)
        {
            //  弹出 About 窗口并设置起始位置为其父窗口中央
            About newForm = new About();
            newForm.TopMost = true;
            newForm.StartPosition = FormStartPosition.CenterParent;
            newForm.ShowDialog();
        }

        private void CharBox_TextChanged(object sender, EventArgs e)
        {
            if (CharBox.Text.Length != 0)
            {
                //  获取ASCII字符文本框的字符并转换成一个int值
                int asciiCode = CharBox.Text.ToCharArray()[0];
                //  以十六进制文本格式输出到十六进制文本框里
                HexBox.Text = "0x" +  asciiCode.ToString("X");
                //  以十进制格式输出到十进制文本框里
                DecBox.Text = asciiCode.ToString();
            }
            else
            {
                HexBox.Clear();
                DecBox.Clear();
            }
        }


        private void DecBox_KeyUp(object sender, System.Windows.Forms.KeyEventArgs e)
        {
            
            if ((e.KeyValue < '0' || e.KeyValue > '9') )
            {
                //  如果按下的字符不是数字
                if ( DecBox.Text.Length > 0)
                {
                    //  文本框里的内容不为空
                    DecBox.Text = DecBox.Text.Substring(0, DecBox.Text.Length - 1);
                    DecBox.SelectionStart = DecBox.Text.Length;
                    DecBox.SelectionLength = 0;
                }

                //e.Handled = false;
                return;
            }
            //else
            //    e.Handled = true;


            if (DecBox.Text.Length != 0)
            {
                //  获取十进制文本框里的字符串转换成int
                int decNumber = Convert.ToInt32(DecBox.Text.ToString());

                //  如果数字大于65535，会导致ASCII文本框溢出
                if (decNumber >= 0xffff)
                    decNumber = 0;

                //  以十六进制格式输出到十六进制文本框里
                HexBox.Text = "0x" + decNumber.ToString("X");

                //  转换为ASCII字符
                char asciiCode = Convert.ToChar(decNumber);

                //  输出到ASCII字符文本框里
                this.CharBox.TextChanged -= new EventHandler(CharBox_TextChanged);
                CharBox.Text = asciiCode.ToString();
                this.CharBox.TextChanged += new EventHandler(CharBox_TextChanged);
            }
            else
            {
                DecBox.Clear();
                CharBox.Clear();
            }
        }


        private void HexBox_KeyUp(object sender, System.Windows.Forms.KeyEventArgs e)
        {
            if ((e.KeyValue >= '0' && e.KeyValue <= '9') || 
                (e.KeyValue >= 'A' && e.KeyValue <= 'F') ||
                (e.KeyValue >= 'a' && e.KeyValue <= 'f'))
            {
                //  输入的内容是十六进制格式的数字
                if (HexBox.Text.Length != 0)
                {
                    int decNumber;

                    bool parseResult = int.TryParse(HexBox.Text.ToString(), System.Globalization.NumberStyles.HexNumber, null, out decNumber);

                    //  如果转换失败，就退出本函数
                    if (parseResult == true)
                    {
                        DecBox.Text = decNumber.ToString();

                        char asciiCode = Convert.ToChar(decNumber);

                        this.CharBox.TextChanged -= new EventHandler(CharBox_TextChanged);
                        CharBox.Text = asciiCode.ToString();
                        this.CharBox.TextChanged += new EventHandler(CharBox_TextChanged);
                    }
                    else if (HexBox.Text.Length > 0)
                    {
                        HexBox.Text = HexBox.Text.Substring(0, HexBox.Text.Length - 1);
                        HexBox.SelectionStart = DecBox.Text.Length;
                        HexBox.SelectionLength = 0;
                    }
                }
                else
                {
                    DecBox.Clear();
                    CharBox.Clear();
                }
            }
            else if (HexBox.Text.Length > 0)
            {
                HexBox.Text = HexBox.Text.Substring(0, HexBox.Text.Length - 1);
                HexBox.SelectionStart = DecBox.Text.Length;
                HexBox.SelectionLength = 0;
            }

        }

        private void checkBox1_CheckedChanged(object sender, EventArgs e)
        {
            //  根据复选框状态设置窗口是否为最顶层窗口
            if (this.TopCheck.Checked == true)
                this.TopMost = true;
            else
                this.TopMost = false;

            this.Show();
        }

    }
}