Silverlight IP地址控件

<span style="font-size:14px;"><UserControl x:Class="<span style="font-family: Arial, Helvetica, sans-serif;">Controls</span><span style="font-family: Arial, Helvetica, sans-serif;">.IPTextBox"</span>
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:sdk="http://schemas.microsoft.com/winfx/2006/xaml/presentation/sdk"
mc:Ignorable="d" d:DesignHeight="26" d:DesignWidth="180">

<Border  BorderThickness="1" CornerRadius="1">
<Border.BorderBrush>
<SolidColorBrush Opacity="0.5" Color="Black" />
</Border.BorderBrush>

<Grid HorizontalAlignment="Stretch">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="10"/>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="10"/>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="10"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>

<TextBox Grid.Column="0" Name="tbIP_1" TabIndex="1" MaxLength="3" Opacity="1"
BorderThickness="0" Height="25" MinWidth="40" FontSize="15"
TextAlignment="Center"
VerticalAlignment="Center" VerticalContentAlignment="Center"
HorizontalAlignment="Stretch" HorizontalContentAlignment="Stretch"
TextChanged="TextBox_OnTextChanged"
KeyDown="TextBox_OnKeyDown" GotFocus="TextBox_OnGotFocus">
</TextBox>

<sdk:Label Grid.Column="1" Background="{Binding Background, ElementName=tbIP_1}" BorderThickness="0" Height="25" Width="10" HorizontalAlignment="Center">.</sdk:Label>
<TextBox Grid.Column="2" Name="tbIP_2" TabIndex="2" MaxLength="3"  Opacity="1"
BorderThickness="0" Height="25" MinWidth="40" FontSize="15"
TextAlignment="Center"
VerticalAlignment="Center" VerticalContentAlignment="Center"
HorizontalAlignment="Stretch" HorizontalContentAlignment="Stretch"
TextChanged="TextBox_OnTextChanged"
KeyDown="TextBox_OnKeyDown" GotFocus="TextBox_OnGotFocus">
</TextBox>

<sdk:Label Grid.Column="3" Background="{Binding Background, ElementName=tbIP_1}" BorderThickness="0" Height="25" Width="10" HorizontalAlignment="Center">.</sdk:Label>
<TextBox Grid.Column="4" Name="tbIP_3" TabIndex="3" MaxLength="3"  Opacity="1"
BorderThickness="0" Height="25" MinWidth="40" FontSize="15"
TextAlignment="Center"
VerticalAlignment="Center" VerticalContentAlignment="Center"
HorizontalAlignment="Stretch" HorizontalContentAlignment="Stretch"
TextChanged="TextBox_OnTextChanged"
KeyDown="TextBox_OnKeyDown" GotFocus="TextBox_OnGotFocus">
</TextBox>

<sdk:Label Grid.Column="5" Background="{Binding Background, ElementName=tbIP_1}" BorderThickness="0" Height="25" Width="10" HorizontalAlignment="Center">.</sdk:Label>
<TextBox Grid.Column="6" Name="tbIP_4" TabIndex="4" MaxLength="3"  Opacity="1"
BorderThickness="0" Height="25" MinWidth="40" FontSize="15"
TextAlignment="Center"
VerticalAlignment="Center" VerticalContentAlignment="Center"
HorizontalAlignment="Stretch" HorizontalContentAlignment="Stretch"
TextChanged="TextBox_OnTextChanged"
KeyDown="TextBox_OnKeyDown" GotFocus="TextBox_OnGotFocus">
</TextBox>
</Grid>
</Border>
</UserControl></span>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;

namespace Controls
{
public partial class IPTextBox : UserControl
{
public event EventHandler OnValueChanged;

#region 自定义依赖项属性
/// <summary>
/// IP地址
/// </summary>
public string Text
{
get { return GetValue(TextProperty).ToString(); }
set { SetValue(TextProperty, value); }
}

public static readonly DependencyProperty TextProperty = DependencyProperty.Register("Text",
typeof(string),
typeof(IPTextBox),
new PropertyMetadata(new PropertyChangedCallback(OnTextPropertyChanged)));

private static void OnTextPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
IPTextBox tb = d as IPTextBox;
tb.SetIP(tb.GetValue(TextProperty).ToString());
}

/// <summary>
/// IP地址模式（Normal:普通IP; Mask:子网掩码）
/// </summary>
public IPAddressMode IPMode
{
get { return (IPAddressMode)GetValue(IPModelProperty); }
set { SetValue(IPModelProperty, value); }
}

public static readonly DependencyProperty IPModelProperty = DependencyProperty.Register("IPMode",
typeof(IPAddressMode),
typeof(IPTextBox), new PropertyMetadata(IPAddressMode.Normal));

#endregion

public IPTextBox()
{
InitializeComponent();
}

private bool isBack = false;

private string GetIP()
{
return string.Format("{0}.{1}.{2}.{3}", tbIP_1.Text, tbIP_2.Text, tbIP_3.Text, tbIP_4.Text);
}
private void SetIP(string ip)
{
var split = ip.Split('.');

if (split.Length >= 4 && !string.IsNullOrEmpty(split[3])) tbIP_4.Text = split[3];
if (split.Length >= 3 && !string.IsNullOrEmpty(split[2])) tbIP_3.Text = split[2];
if (split.Length >= 2 && !string.IsNullOrEmpty(split[1])) tbIP_2.Text = split[1];
if (split.Length >= 1 && !string.IsNullOrEmpty(split[0])) tbIP_1.Text = split[0];
}

//处理Ctrl+V
private void OnPreviewKeyDown(object sender, KeyEventArgs e)
{
if ((e.Key == Key.V) && Keyboard.Modifiers == ModifierKeys.Control)
{
string clipboardString = string.Empty;
if (Clipboard.ContainsText())
{
clipboardString = Clipboard.GetText();
if (clipboardString.IsIPv4())
{
this.Text = clipboardString;
e.Handled = true;
}
}
}
}

//键盘按键按下
private void TextBox_OnKeyDown(object sender, KeyEventArgs e)
{
if (e.Key != Key.Tab)
{
TextBox tb = sender as TextBox;

if ((tb.Name == "tbIP_1" || tb.Name == "tbIP_4"))
{
//普通IP首位末位不能为0
if (IPMode == IPAddressMode.Normal && (e.Key == Key.D0 || e.Key == Key.NumPad0))
{
e.Handled = true;
return;
}
}

if (e.Key == Key.Decimal)//小数点键
{
e.Handled = true;
if (tb.Text.Length != 0)
{
NextGetFocus(tb.Name);
}
return;
}
else if (e.Key == Key.Back)
{
e.Handled = true;
isBack = true;
if (tb.Text.Length == 0)
{
PrevGetFocus(tb.Name);
}
return;
}
else if (e.Key < Key.D0 || e.Key > Key.D9 && e.Key < Key.NumPad0 || e.Key > Key.NumPad9)
{
e.Handled = true;
return;
}
//最多输入三位数字
if (tb.Text.Length == 3 && tb.SelectedText.Length == 0)
{
e.Handled = true;
return;
}
}
}

//获取到焦点
private void TextBox_OnGotFocus(object sender, RoutedEventArgs e)
{
TextBox tb = sender as TextBox;
if (isBack)//回退事件不选中当前文本
{
if (tb.Text.Length != 0)
{
tb.SelectionStart = tb.Text.Length;
}
return;
}

if (tb.Text.Length != 0)
{
tb.SelectAll();
}
}

//文本框文本改变
private void TextBox_OnTextChanged(object sender, TextChangedEventArgs e)
{
TextBox tb = sender as TextBox;

string ip = this.GetIP();

if (ip == "0.0.0.0" && IPMode != IPAddressMode.Gateway)
{
tb.Text = "";
return;
}

//删除前面的0
if (tb.Text.Length == 2 && tb.Text.StartsWith("0"))
{
tb.Text = tb.Text.Remove(0, 1);
}
//验证合法，大于255删除最后一位
if (tb.Text.Length == 3)
{
if (int.Parse(tb.Text) > 255)
{
tb.Text = tb.Text.Remove(2, 1);
tb.SelectionStart = 2;
}
else
{
NextGetFocus(tb.Name);
}
}

this.SetValue(TextProperty, ip);
if (OnValueChanged != null)
{
OnValueChanged(null, null);
}
}

private void PrevGetFocus(string tbName)
{
switch (tbName)
{
case "tbIP_4":
tbIP_3.Focus();
tbIP_3.SelectAll();
break;
case "tbIP_3":
tbIP_2.Focus();
tbIP_2.SelectAll();
break;
case "tbIP_2":
tbIP_1.Focus();
tbIP_1.SelectAll();
break;
}
}
private void NextGetFocus(string tbName)
{
switch (tbName)
{
case "tbIP_1":
tbIP_2.Focus();
tbIP_2.SelectAll();
break;
case "tbIP_2":
tbIP_3.Focus();
tbIP_3.SelectAll();
break;
case "tbIP_3":
tbIP_4.Focus();
tbIP_4.SelectAll();
break;
}
}

public void Clear()
{
this.tbIP_1.Text = "";
this.tbIP_2.Text = "";
this.tbIP_3.Text = "";
this.tbIP_4.Text = "";
}
}

public enum IPAddressMode
{
/// <summary>
/// 普通IP地址
/// </summary>
Normal,
/// <summary>
/// 子网掩码
/// </summary>
Mask,
/// <summary>
/// 网关
/// </summary>
Gateway
}
}

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