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:
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) { } } } |
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原文链接:https://blog.csdn.net/taoerit/article/details/42535349