C#创建用户控件 - IPv4地址输入框

根据网上的改写：http://blog.csdn.net/jhqin/article/details/5823363

控件属性：

Text：获取或设置string类型的IP地址

Value：获取或设置IPAddress类型的IP地址

Type：获取IP地址所属分类。分A、B、C、D、E 5大类。

BorderStyle：获取或设置控件的边框样式。

ValidateIP() 判断ip是否有效

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Windows.Forms;
using System.Text.RegularExpressions;
using System.Net;namespace FVD.Common
{public enum IPType : byte { A, B, C, D, E };public class IPAddressTextBox : UserControl{private System.Windows.Forms.TextBox textBox1;private System.Windows.Forms.TextBox textBox2;private System.Windows.Forms.TextBox textBox3;private System.Windows.Forms.TextBox textBox4;private System.Windows.Forms.Label label1;private System.Windows.Forms.Label label2;private System.Windows.Forms.Label label3;/// <summary> /// 必需的设计器变量。/// </summary>private System.ComponentModel.IContainer components = null;/// <summary> /// 清理所有正在使用的资源。/// </summary>/// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>protected override void Dispose(bool disposing){if (disposing && (components != null)){components.Dispose();}base.Dispose(disposing);}#region 组件设计器生成的代码/// <summary> /// 设计器支持所需的方法 - 不要/// 使用代码编辑器修改此方法的内容。/// </summary>private void InitializeComponent(){this.textBox1 = new System.Windows.Forms.TextBox();this.textBox2 = new System.Windows.Forms.TextBox();this.textBox3 = new System.Windows.Forms.TextBox();this.textBox4 = new System.Windows.Forms.TextBox();this.label1 = new System.Windows.Forms.Label();this.label2 = new System.Windows.Forms.Label();this.label3 = new System.Windows.Forms.Label();this.SuspendLayout();// // textBox1// this.textBox1.Location = new System.Drawing.Point(0, 2);this.textBox1.MaxLength = 3;this.textBox1.Name = "textBox1";this.textBox1.Size = new System.Drawing.Size(25, 21);this.textBox1.TabIndex = 0;this.textBox1.TextAlign = System.Windows.Forms.HorizontalAlignment.Center;this.textBox1.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.IPv4TextBox_KeyPress);// // textBox2// this.textBox2.Location = new System.Drawing.Point(33, 2);this.textBox2.MaxLength = 3;this.textBox2.Name = "textBox2";this.textBox2.Size = new System.Drawing.Size(25, 21);this.textBox2.TabIndex = 1;this.textBox2.TextAlign = System.Windows.Forms.HorizontalAlignment.Center;this.textBox2.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.IPv4TextBox_KeyPress);// // textBox3// this.textBox3.Location = new System.Drawing.Point(67, 2);this.textBox3.MaxLength = 3;this.textBox3.Name = "textBox3";this.textBox3.Size = new System.Drawing.Size(25, 21);this.textBox3.TabIndex = 2;this.textBox3.TextAlign = System.Windows.Forms.HorizontalAlignment.Center;this.textBox3.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.IPv4TextBox_KeyPress);// // textBox4// this.textBox4.Location = new System.Drawing.Point(100, 2);this.textBox4.MaxLength = 3;this.textBox4.Name = "textBox4";this.textBox4.Size = new System.Drawing.Size(25, 21);this.textBox4.TabIndex = 3;this.textBox4.TextAlign = System.Windows.Forms.HorizontalAlignment.Center;this.textBox4.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.IPv4TextBox_KeyPress);// // label1// this.label1.AutoSize = true;this.label1.Font = new System.Drawing.Font("宋体", 12F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134)));this.label1.Location = new System.Drawing.Point(25, 5);this.label1.Name = "label1";this.label1.Size = new System.Drawing.Size(16, 16);this.label1.TabIndex = 4;this.label1.Text = ".";this.label1.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;// // label2// this.label2.AutoSize = true;this.label2.Font = new System.Drawing.Font("宋体", 12F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134)));this.label2.Location = new System.Drawing.Point(57, 5);this.label2.Name = "label2";this.label2.Size = new System.Drawing.Size(16, 16);this.label2.TabIndex = 5;this.label2.Text = ".";this.label2.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;// // label3// this.label3.AutoSize = true;this.label3.Font = new System.Drawing.Font("宋体", 12F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134)));this.label3.Location = new System.Drawing.Point(92, 5);this.label3.Name = "label3";this.label3.Size = new System.Drawing.Size(16, 16);this.label3.TabIndex = 6;this.label3.Text = ".";this.label3.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;// // IPAddressTextBox// this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;this.Controls.Add(this.textBox4);this.Controls.Add(this.textBox3);this.Controls.Add(this.textBox2);this.Controls.Add(this.label3);this.Controls.Add(this.label2);this.Controls.Add(this.label1);this.Controls.Add(this.textBox1);this.Name = "IPAddressTextBox";this.Size = new System.Drawing.Size(125, 28);this.ResumeLayout(false);this.PerformLayout();}#endregionpublic IPAddressTextBox(){InitializeComponent();}private void IPv4TextBox_KeyPress(object sender, KeyPressEventArgs e){char KeyChar = e.KeyChar;int TextLength = ((TextBox)sender).TextLength;if (KeyChar == '.' || KeyChar == '。' || KeyChar == ' '){if ((((TextBox)sender).SelectedText.Length == 0) && (TextLength > 0) && (((TextBox)sender) != textBox4)){   // 进入下一个文本框SendKeys.Send("{Tab}");}e.Handled = true;}if (Regex.Match(KeyChar.ToString(), "[0-9]").Success){if (TextLength == 2){if (int.Parse(((TextBox)sender).Text + e.KeyChar.ToString()) > 255){e.Handled = true;}}else if (TextLength == 0){if (KeyChar == '0'){e.Handled = true;}}}else{   // 回删操作if (KeyChar == '\b'){if (TextLength == 0){if (((TextBox)sender) != textBox1){   // 回退到上一个文本框 Shift+TabSendKeys.Send("+{TAB}{End}");}                        }}else{e.Handled = true;}}}/// <summary>/// string类型的IP地址/// </summary>override public string Text{get{return this.Value.ToString();}set{IPAddress address;if (IPAddress.TryParse(value, out address)){byte[] bytes = address.GetAddressBytes();for (int i = 1; i <= 4; i++){this.Controls["textBox" + i.ToString()].Text = bytes[i - 1].ToString("D");}}                }}/// <summary>/// IP地址/// </summary>public IPAddress Value{get{IPAddress address;string ipString = textBox1.Text + "." + textBox2.Text + "." + textBox3.Text + "." + textBox4.Text;if (IPAddress.TryParse(ipString, out address)){return address;}else{return new IPAddress(0);}              }set{byte[] bytes = value.GetAddressBytes();for (int i = 1; i <= 4; i++){this.Controls["textBox" + i.ToString()].Text = bytes[i - 1].ToString("D");}}}/// <summary>/// IP地址分类/// </summary>public IPType Type{get{byte[] bytes = this.Value.GetAddressBytes();int FirstByte = bytes[0];if (FirstByte < 128){return IPType.A;}else if (FirstByte < 192){return IPType.B;}else if (FirstByte < 224){return IPType.C;}else if (FirstByte < 240){return IPType.D;}else{return IPType.E;    // 保留做研究用
                }}}public bool ValidateIP(){IPAddress address;string ipString = textBox1.Text + "." + textBox2.Text + "." + textBox3.Text + "." + textBox4.Text;return IPAddress.TryParse(ipString, out address);}/// <summary>/// 控件的边框样式/// </summary>new public BorderStyle BorderStyle{get{return this.textBox1.BorderStyle;}set{for (int i = 1; i <= 4; i++){((TextBox)this.Controls["textBox" + i.ToString()]).BorderStyle = value;}}}}
}

转载于:https://www.cnblogs.com/jhlong/p/5534723.html

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