C# Winform 支持Hex与ASCII输入和切换的文本框

最近一直在做一个支持串口，TCP,UDP通讯调试的一体化工具（也就是C#超级通信调试工具 v1.0），其中涉及到16进制数据和ASCII码的输入，所以继承了TextBox的基础上，写了这个支持Hex与ASCII输入和切换的文本框。

主要实现了如下功能：

• 可输入Hex，ASCII
• 支持复制，粘贴，剪切操作。在粘贴数据时，可自动对输入的数据格式检查。
• 可切换显示Hex与ASCII的输入文本框
• Hex输入时可自动每2个字符之间添加空格

本人经过了一些简单测试，目前未发现BUG。如果有什么写的不好，或者不对的地方，欢迎留言指正。

 

using System;using System.Collections.Generic;using System.Text;using System.Windows.Forms;using System.ComponentModel;namespace LeafSoft.Units{    /// <summary>    /// Hex/ASCII输入文本框    /// 作者：一叶知秋    /// 日期：2013年7月11日    /// 可输入Hex，ASCII    /// 可切换显示Hex与ASCII的输入文本框    /// Hex输入时可自动每2个字符之间添加空格    /// </summary>    public class BytesBox:TextBox    {        ContextMenuStrip CMenu = new ContextMenuStrip();        ToolStripMenuItem CM_Type = new ToolStripMenuItem();        ToolStripMenuItem CM_Clear = new ToolStripMenuItem();        public BytesBox()        {            #region 快捷菜单            CM_Type.Name = "CM_Type";            CM_Type.Size = new System.Drawing.Size(127, 22);            CM_Type.Text = "ASCII";            CM_Type.Click += new System.EventHandler(CM_Type_Click);            CM_Clear.Name = "CM_Clear";            CM_Clear.Size = new System.Drawing.Size(127, 22);            CM_Clear.Text = "清空";            CM_Clear.Click += new System.EventHandler(CM_Clear_Click);            CMenu.Name = "CMenu";            CMenu.ShowImageMargin = false;            CMenu.Size = new System.Drawing.Size(128, 48);            CMenu.Items.AddRange(new ToolStripItem[] {            CM_Type,CM_Clear});            this.ContextMenuStrip = CMenu;            #endregion        }        #region 属性        bool _IsHex = true;        [Description("True:Hex;False:ASCII"), Category("输入格式设置")]        public bool IsHex        {            set {                _IsHex = value;                if (_IsHex)                {                    CM_Type.Text = "ASCII";                }                else                {                    CM_Type.Text = "Hex";                }            }            get {                return _IsHex;            }        }        #endregion        #region 菜单操作        /// <summary>        /// HEX/ASCII 格式切换        /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>        private void CM_Type_Click(object sender, EventArgs e)        {            if (IsHex)            {//切换到ASCII格式                IsHex = false;                if (this.Text.Length > 0)                {                    string[] HexStr = this.Text.Trim().Split(' ');                    byte[] data = new byte[HexStr.Length];                    for (int i = 0; i < HexStr.Length; i++)                    {                        data[i] = (byte)(Convert.ToInt32(HexStr[i], 16));                    }                    this.Text = new ASCIIEncoding().GetString(data);                }            }            else            {//切换到Hex格式                IsHex = true;                                if (this.Text.Length > 0)                {                    byte[] data = new ASCIIEncoding().GetBytes(this.Text.Trim());                    StringBuilder sb = new StringBuilder();                    for (int i = 0; i < data.Length; i++)                    {                        sb.AppendFormat("{0:x2}", data[i]);                    }                    this.Text = sb.ToString();                }            }                    }        /// <summary>        /// 清空数据        /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>        private void CM_Clear_Click(object sender, EventArgs e)        {            this.Text = "";        }        #endregion        #region 输入控制        protected override void OnTextChanged(EventArgs e)        {            if (_IsHex)            {//Hex输入                string Content = this.Text.Replace(" ", "");//获取去除空格后的字符内容                int SpaceCount = Content.Length / 2;                int StartIndex = 2;                for (int i = 0; i < SpaceCount; i++)                {                    Content = Content.Insert(StartIndex, " ");                    StartIndex = StartIndex + 3;                }                this.Text = Content.TrimEnd().ToUpper();            }            this.SelectionStart = this.Text.Length;        }        protected override void OnKeyPress(KeyPressEventArgs e)        {            if (_IsHex)            {                if ((e.KeyChar >= '0' && e.KeyChar <= '9')//数字0-9键                        || (e.KeyChar >= 'A' && e.KeyChar <= 'F')//字母A-F                      || (e.KeyChar >= 'a' && e.KeyChar <= 'f')//字母a-f                      || e.KeyChar == 0x08//退格键                     || e.KeyChar == 0x03//拷贝                     || e.KeyChar == 0x18)//剪切                {                    e.Handled = false;                    return;                }            }            else            {                if ((e.KeyChar >= 0x20 && e.KeyChar <= 0x7E)                     || e.KeyChar == 0x08//退格键                     || e.KeyChar == 0x0D//回车键                     || e.KeyChar == 0x03//拷贝                     || e.KeyChar == 0x18)//剪切                {                    e.Handled = false;                    return;                }            }            if (e.KeyChar == 0x16)//粘贴            {//粘贴前数据格式检查                if (CheckPaste())                {                    e.Handled = false;                    return;                }            }            e.Handled = true;        }        /// <summary>        /// 粘贴数据格式检查        /// </summary>        /// <returns></returns>        private bool CheckPaste()        {            try            {                char[] PasteChar = Clipboard.GetDataObject().GetData(DataFormats.Text).ToString().ToCharArray();                if (_IsHex)                {                    foreach (char data in PasteChar)                    {                        if (!((data >= '0' && data <= '9')//数字0-9键                            || (data >= 'A' && data <= 'F')//字母A-F                          || (data >= 'a' && data <= 'f')//字母a-f                         || data == 0x20))//空格                        {                            MessageBox.Show("粘贴数据含有非法字符，只能包含数字0-9,大写英文字母A-F,小写英文字母a-f以及空格！", "非法的粘贴", MessageBoxButtons.OK, MessageBoxIcon.Error);                            return false;                        }                    }                }                else                {                    foreach (char data in PasteChar)                    {                        if (!((data >= 0x20 && data <= 0x7E)                         || data == 0x0A                         || data == 0x0D))//回车键                        {                            MessageBox.Show("粘贴数据含有非法字符，只能包含ASCII码字符！", "非法的粘贴", MessageBoxButtons.OK, MessageBoxIcon.Error);                            return false;                        }                    }                }                return true;            }            catch (Exception ex)            {                MessageBox.Show(ex.Message);                return false;            }        }        #endregion        #region 公共方法        /// <summary>        /// 获取命令对象        /// </summary>        /// <returns></returns>        public Model.Command GetCMD()        {            try            {                if (this.Text.Trim() == string.Empty)                {                    MessageBox.Show("不允许内容为空！");                    return null;                }                Model.Command Cmd = new Model.Command();                Cmd.IsHex = _IsHex;                if (Cmd.IsHex)                {//Hex                    string[] HexStr = this.Text.Trim().Split(' ');                    Cmd.DataBytes = new byte[HexStr.Length];                    for (int i = 0; i < HexStr.Length; i++)                    {                        Cmd.DataBytes[i] = (byte)(Convert.ToInt32(HexStr[i], 16));                    }                }                else                { //ASCII                    Cmd.DataBytes = new ASCIIEncoding().GetBytes(this.Text.Trim());                }                return Cmd;            }            catch(Exception ex)            {                MessageBox.Show(ex.Message);                return null;            }        }        /// <summary>        /// 设置命令对象        /// </summary>        /// <param name="Cmd"></param>        public void SetCMD(Model.Command Cmd)        {            try            {                this.IsHex = Cmd.IsHex;                if (this.IsHex)                {                    StringBuilder sb = new StringBuilder();                    for (int i = 0; i < Cmd.DataBytes.Length; i++)                    {                        sb.AppendFormat("{0:x2}", Cmd.DataBytes[i]);                    }                    this.Text = sb.ToString();                }                else                {                    this.Text = new ASCIIEncoding().GetString(Cmd.DataBytes);                }            }            catch (Exception ex)            {                MessageBox.Show(ex.Message);            }        }        #endregion    }}

using System;using System.Collections.Generic;using System.Text;namespace Model{    /// <summary>    /// 命令对象    /// </summary>    public class Command    {        bool _IsHex = true;        byte[] _DataBytes = null;        /// <summary>        /// 是否16进制数据        /// </summary>        public bool IsHex        {            set {                _IsHex = value;            }            get {                return _IsHex;            }        }        /// <summary>        /// byte数据        /// </summary>        public byte[] DataBytes        {            set            {                _DataBytes = value;            }            get            {                return _DataBytes;            }        }    }}