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C#自定义IP输入框控件

︶ㄣ速达网 メ
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这篇文章主要为大家详细介绍了C#自定义IP输入框控件，具有一定的参考价值，感兴趣的小伙伴们可以参考一下

场景: 做一些网络设备应用时，需要有ip地址的输入，这就需要ip地址输入框控件

思路:

       1 重写TextBox 为IpInputBox。

        2 重写TextBox为SubIpInputBox

        3 一个IpInputBox 添加4个SubIpInputBox 和3个Label

控件图：

C#自定义IP输入框控件

具体代码:

主窗口文件   Dialog.cs

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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 IP
{
  public delegate void FallBackEvent(IpInputBox box, int flag);
 
  public partial class Dialog : Form
  {
    public Dialog()
    {
      InitializeComponent();
    }
 
    private void Form1_Load(object sender, EventArgs e)
    {
      this.Controls.Add(ipBox);
      ipBox.Location = new Point(10,10);
    }
 
    private IpInputBox ipBox = new IpInputBox(false);
  }
}

IpInputBox.cs 文件

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Drawing;
 
namespace IP
{
  public class IpInputBox :TextBox
  {
    private bool _isNetmask = false;
    public bool IsNetmask
    {
      get { return _isNetmask; }
      set { _isNetmask = value; }
    }
    public IpInputBox(bool isNetmask)
    {
      _isNetmask = isNetmask;
 
      this.Size = new System.Drawing.Size(150, 25);
 
      _dotLabel1.Text = ".";
      _dotLabel2.Text = ".";
      _dotLabel3.Text = ".";
 
      _dotLabel1.Size = new System.Drawing.Size(10, 25);
      _dotLabel2.Size = new System.Drawing.Size(10, 25);
      _dotLabel3.Size = new System.Drawing.Size(10, 25);
 
      _box1.IsNetmask = _isNetmask;
      _box2.IsNetmask = _isNetmask;
      _box3.IsNetmask = _isNetmask;
      _box4.IsNetmask = _isNetmask;
 
      _box1.Flag = 1;
      _box2.Flag = 2;
      _box3.Flag = 3;
      _box4.Flag = 4;
 
 
      this.Controls.Add(_box1);
      this.Controls.Add(_dotLabel1);
 
 
      this.Controls.Add(_box2);
      this.Controls.Add(_dotLabel2);
 
 
      this.Controls.Add(_box3);
      this.Controls.Add(_dotLabel3);
 
      this.Controls.Add(_box4);
 
      this.Font = new System.Drawing.Font(this.Font.Name, 11);
      _box1.Location = new System.Drawing.Point(-1, 2);
      _dotLabel1.Location = new System.Drawing.Point(29, 2);
      _box2.Location = new System.Drawing.Point(39, 2);
      _dotLabel2.Location = new System.Drawing.Point(69, 2);
      _box3.Location = new System.Drawing.Point(79, 2);
      _dotLabel3.Location = new System.Drawing.Point(109, 2);
      _box4.Location = new System.Drawing.Point(119, 2);
 
      _box1.Box = this;
      _box2.Box = this;
      _box3.Box = this;
      _box4.Box = this;
    }
    public void FallBackEventFun(IpInputBox box, int flag)
    {
      switch (flag)
      {
        case 1:
          _box1.Focus();
          break;
        case 2:
          _box1.Focus();
          break;
        case 3:
          _box2.Focus(); ;
          break;
        case 4:
          _box3.Focus(); ;
          break;
      }
    }
 
    private string _ipAddress = string.Empty;
    public void UpDateIpaddress()
    {
      try
      {
        string[] sArray = ipAddress.Split(new char[] { '.' });
        _box1.Text = sArray[0];
        _box2.Text = sArray[1];
        _box3.Text = sArray[2];
        _box4.Text = sArray[3];
      }
      catch (Exception exp)
      {
        MessageBox.Show("更新字符串失败:" + exp.Message);
      }
    }
 
    /// <summary>
    /// 获取ip地址
    /// </summary>
    public string IpAddressString
    {
      get
      {
        string _ipStr1 = _box1.Text;
        string _ipStr2 = _box2.Text;
        string _ipStr3 = _box3.Text;
        string _ipStr4 = _box4.Text;
        string _ipDotStr = ".";
        _ipAddress = _ipStr1 + _ipDotStr + _ipStr2 + _ipDotStr + _ipStr3 + _ipDotStr + _ipStr4;
        return _ipAddress;
      }
      set
      {
        _ipAddress = value;
      }
    }
    private string ipAddress = string.Empty;
 
    public string IpAddress
    {
      get { return ipAddress; }
      set { ipAddress = value; }
    }
 
    private SubIpInputBox _box1 = new SubIpInputBox("");
    private SubIpInputBox _box2 = new SubIpInputBox("");
    private SubIpInputBox _box3 = new SubIpInputBox("");
    private SubIpInputBox _box4 = new SubIpInputBox("");
 
    private Label _dotLabel1 = new Label();
    private Label _dotLabel2 = new Label();
    private Label _dotLabel3 = new Label();
 
  }
}

SubIpInputBox.cs 文件

 

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Drawing;
using System.Windows.Forms;
 
namespace IP
{
  public class SubIpInputBox:TextBox
  {
      /// <summary>
      /// 判断是否是子网掩码,false表示ip地址,true表示子网掩码
      /// </summary>
      private bool _isNetmask = false;
      private bool _isSendKey = false;
      private System.ComponentModel.IContainer components;
      private int _flag = 0;
 
      public int Flag
      {
        get { return _flag; }
        set { _flag = value; }
      }
 
      /// <summary>
      /// 
      /// </summary>
      public event FallBackEvent TextFallBackEvent;
 
 
      //定义事件函数
      public void FallBackEventFun(int flag)
      {
        if (TextFallBackEvent != null)
        {
          TextFallBackEvent(box, this.Flag);
        }
      }
 
      public bool IsNetmask
      {
        get { return _isNetmask; }
        set { _isNetmask = value; }
      }
 
      /// <summary>
      /// 构造函数
      /// </summary>
      public SubIpInputBox(bool isNetmask)
      {
        _isNetmask = isNetmask;
        box = new IpInputBox(_isNetmask);
        this.Font = new System.Drawing.Font(this.Font.Name, 11);
        this.BorderStyle = System.Windows.Forms.BorderStyle.None;//去掉边框
        this.TextAlign = HorizontalAlignment.Center;//字体居中
        this.Size = new System.Drawing.Size(30, 25);
        this.MaxLength = 3;
      }
 
      public SubIpInputBox(string str)
      {
        this.Text = str;
        this.Size = new System.Drawing.Size(30, 25);
        this.MaxLength = 3;
        this.BorderStyle = System.Windows.Forms.BorderStyle.None;//去掉边框
        this.TextAlign = HorizontalAlignment.Center;//字体居中
      }
 
      private IpInputBox box;
      public IpInputBox Box
      {
        get { return box; }
        set { box = value; }
      }
 
      protected override void OnKeyUp(KeyEventArgs e)
      {
        base.OnKeyUp(e);
 
 
        if (this.Text == "")
        {
          if (e.KeyCode.ToString() == "Back")
          {
            this.TextFallBackEvent += new FallBackEvent(box.FallBackEventFun);
            this.FallBackEventFun(this.Flag);
          }
        }
      }
      protected override void OnKeyPress(KeyPressEventArgs e)
      {
        base.OnKeyPress(e);
 
        //阻止从键盘输入键
        e.Handled = true;
 
 
        if ((e.KeyChar >= '0' && e.KeyChar <= '9') || (e.KeyChar == (char)8))
        {
 
          if ((e.KeyChar == (char)8))
          {
            e.Handled = false; return;
          }
          else
          {
            int len = this.Text.Length;
            if (len < 4)
            {
              if (len == 0 && e.KeyChar != '0')
              {
                e.Handled = false; return;
              }
              else if (len == 0)
              {
                if (this.Flag == 1 && this.IsNetmask == false)
                {
                  return;
                }
              }
              e.Handled = false; return;
            }
            else
            {
              // MessageBox.Show("编号最多只能输入3位数字！");
            }
          }
        }
        else if (e.KeyChar == '.')
        {
          //MessageBox.Show("编号只能输入数字！");
          if (this.Text.Length != 0)
          {
            // 如果输入 . 就执行 TAB 键 
            SendKeys.SendWait("{TAB}");
          }
        }
        else if (this._isSendKey)
        {
          this.SelectAll();
        }
 
      }
 
 
      protected override void OnTextChanged(EventArgs e)
      {
 
        try
        {
          string currentStr = this.Text;
          int currentNumber = Convert.ToInt32(currentStr);
          this.Text = currentNumber.ToString();
          this.SelectionStart = currentStr.Length;//设置光标在末尾
          if (_isNetmask == false)//表示ip地址
          {
 
            if (currentNumber > 223 || (currentNumber == 0 && this.Flag == 1))
            {
              MessageBox.Show("你输入的" + currentStr + "不是有效数值，请指定一个介于1到223之间的数值!", "错误", MessageBoxButtons.OK, MessageBoxIcon.Warning);
 
              if (this.Flag == 1 && currentNumber == 0)
              {
                this.Text = "1";
              }
              else
              {
                this.Text = "223";
              }
              _isSendKey = true;
              this.Focus();
              this.SelectionStart = currentStr.Length;//设置光标在末尾
              this.SelectAll();
            }
            else
            {
              if (currentStr.Length == 3 && _isSendKey == false)
              {// 当输入的字符个数为3时，跳入另外一个输入框
                //MessageBox.Show("输入完毕");
                if (currentNumber == 0)
                {
                  this.Text = "";
                  MessageBox.Show("000");
                }
                SendKeys.SendWait("{TAB}");
              }
            }
 
          }
          else//子网掩码
          {
            if (currentNumber > 255)
            {
              MessageBox.Show("你输入的" + currentStr + "不是有效数值，请指定一个介于0到255之间的数值!", "错误", MessageBoxButtons.OK, MessageBoxIcon.Warning);
              this.Text = "255";
              this.Focus();
              this.SelectionStart = currentStr.Length;//设置光标在末尾
              this.SelectAll();
            }
            else
            {
              if (currentStr.Length == 3 && _isSendKey == false)
              {// 当输入的字符个数为3时，跳入另外一个输入框
                //MessageBox.Show("输入完毕");
                SendKeys.SendWait("{TAB}");
 
              }
            }
          }
        }
        catch
        {
          // 异常处理
        }
      }
 
      private void InitializeComponent()
      {
        this.SuspendLayout();
        // 
        // SubIpInputBox
        // 
        this.TabIndexChanged += new System.EventHandler(this.SubTextBox_TabIndexChanged);
        this.ResumeLayout(false);
      }
      private void SubTextBox_TabIndexChanged(object sender, EventArgs e)
      {
 
      }
  }
}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持米米素材网。

原文链接：https://blog.csdn.net/taoerit/article/details/42535349