WPF自定义控件（三）の扩展控件

 1 <ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
 2                     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
 3                     xmlns:ctrl="clr-namespace:KAN.WPF.XCtrl.Controls">
 4     <Style TargetType="{x:Type ctrl:XTextBox}">
 5         <!--StyleFocusVisual-->
 6         <Style.Resources>
 7             <ResourceDictionary Source="/KAN.WPF.Xctrl;component/Themes/CommonStyle.xaml"/>
 8         </Style.Resources>
 9         <Setter Property="FocusVisualStyle" Value="{StaticResource StyleFocusVisual}"/>
10         <Setter Property="BorderBrush" Value="Silver"/>
11         <Setter Property="BorderThickness" Value="1"/>
12         <Setter Property="Template">
13             <Setter.Value>
14                 <ControlTemplate TargetType="{x:Type ctrl:XTextBox}">
15                     <Border Name="brdText" Background="{TemplateBinding Background}"  BorderThickness="{TemplateBinding BorderThickness}"
16                           BorderBrush="{TemplateBinding BorderBrush}"  SnapsToDevicePixels="true" Padding="2">
17                         <Grid>
18                             <ScrollViewer x:Name="PART_ContentHost" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
19                             <StackPanel Orientation="Horizontal" Visibility="Collapsed" Name="stpWatermark">
20                                 <TextBlock HorizontalAlignment="Left" VerticalAlignment="Center" 
21                                            FontSize="{TemplateBinding FontSize}" FontFamily="{TemplateBinding FontFamily}"
22                                            Foreground="{Binding XWmkForeground, RelativeSource={RelativeSource TemplatedParent}}" 
23                                            Text="{Binding XWmkText, RelativeSource={RelativeSource TemplatedParent}}" Cursor="IBeam" />
24                             </StackPanel>
25                             <ContentPresenter></ContentPresenter>
26                         </Grid>
27                     </Border>
28                     <ControlTemplate.Triggers>
29                         <!--当失去焦点并且没有输入任何内容时-->
30                         <MultiTrigger>
31                             <MultiTrigger.Conditions>
32                                 <Condition Property="Text" Value=""/>
33                                 <Condition Property="IsFocused" Value="False"/>
34                             </MultiTrigger.Conditions>
35                             <MultiTrigger.Setters>
36                                 <Setter Property="Visibility" TargetName="stpWatermark" Value="Visible"/>
37                             </MultiTrigger.Setters>
38                         </MultiTrigger>
39                         <!--当验证失败时-->
40                         <Trigger Property="XIsError" Value="true">
41                             <Setter TargetName="brdText" Property="BorderBrush" Value="Red" />
42                             <Setter TargetName="brdText" Property="Background" Value="Beige" />
43                         </Trigger>
44                     </ControlTemplate.Triggers>
45                 </ControlTemplate>
46             </Setter.Value>
47         </Setter>
48     </Style>
49 </ResourceDictionary>

  1 using System;
  2 using System.Windows;
  3 using System.Windows.Controls;
  4 using System.Windows.Media;
  5 using System.Windows.Input;
  6 using System.Text.RegularExpressions;
  7 
  8 namespace KAN.WPF.XCtrl.Controls
  9 {
 10     /// <summary>
 11     /// 扩展输入框：可设置水印,可设置必填,可设置正则表达式验证
 12     /// </summary>
 13     public class XTextBox:TextBox
 14     {
 15         #region 依赖属性
 16         public static readonly DependencyProperty XWmkTextProperty;//水印文字
 17         public static readonly DependencyProperty XWmkForegroundProperty;//水印着色
 18         public static readonly DependencyProperty XIsErrorProperty;//是否字段有误
 19         public static readonly DependencyProperty XAllowNullProperty;//是否允许为空
 20         public static readonly DependencyProperty XRegExpProperty;//正则表达式
 21         #endregion
 22 
 23         #region 内部方法
 24         /// <summary>
 25         /// 注册事件
 26         /// </summary>
 27         public XTextBox()
 28         {
 29             this.LostFocus += new RoutedEventHandler(XTextBox_LostFocus);
 30             this.GotFocus += new RoutedEventHandler(XTextBox_GotFocus);
 31             this.PreviewMouseDown += new MouseButtonEventHandler(XTextBox_PreviewMouseDown);
 32         }
 33 
 34         /// <summary>
 35         /// 静态构造函数
 36         /// </summary>
 37         static XTextBox()
 38         {
 39             //注册依赖属性
 40             XTextBox.XWmkTextProperty = DependencyProperty.Register("XWmkText", typeof(String), typeof(XTextBox), new PropertyMetadata(null));
 41             XTextBox.XAllowNullProperty = DependencyProperty.Register("XAllowNull", typeof(bool), typeof(XTextBox), new PropertyMetadata(true));
 42             XTextBox.XIsErrorProperty = DependencyProperty.Register("XIsError", typeof(bool), typeof(XTextBox), new PropertyMetadata(false));
 43             XTextBox.XRegExpProperty = DependencyProperty.Register("XRegExp", typeof(string), typeof(XTextBox), new PropertyMetadata(""));
 44             XTextBox.XWmkForegroundProperty = DependencyProperty.Register("XWmkForeground", typeof(Brush), 
 45                 typeof(XTextBox), new PropertyMetadata(Brushes.Silver));
 46             FrameworkElement.DefaultStyleKeyProperty.OverrideMetadata(typeof(XTextBox), new FrameworkPropertyMetadata(typeof(XTextBox)));
 47         }
 48 
 49         /// <summary>
 50         /// 失去焦点时检查输入
 51         /// </summary>
 52         /// <param name="sender"></param>
 53         /// <param name="e"></param>
 54         void XTextBox_LostFocus(object sender, RoutedEventArgs e)
 55         {
 56             this.XIsError = false;
 57             if (XAllowNull == false && this.Text.Trim() == "")
 58             {
 59                 this.XIsError = true;
 60             }
 61             if (Regex.IsMatch(this.Text.Trim(), XRegExp) == false)
 62             {
 63                 this.XIsError = true;
 64             }
 65         }
 66 
 67         /// <summary>
 68         /// 获得焦点时选中文字
 69         /// </summary>
 70         /// <param name="sender"></param>
 71         /// <param name="e"></param>
 72         void XTextBox_GotFocus(object sender, RoutedEventArgs e)
 73         {
 74             this.SelectAll();
 75         }
 76 
 77         /// <summary>
 78         /// 鼠标点击时选中文字
 79         /// </summary>
 80         /// <param name="sender"></param>
 81         /// <param name="e"></param>
 82         void XTextBox_PreviewMouseDown(object sender, MouseButtonEventArgs e)
 83         {
 84             if (this.IsFocused == false)
 85             {
 86                 TextBox textBox = e.Source as TextBox;
 87                 textBox.Focus();
 88                 e.Handled = true;
 89             }
 90         }
 91         #endregion
 92 
 93         #region 公布属性
 94         /// <summary>
 95         /// 公布属性XWmkText（水印文字）
 96         /// </summary>
 97         public String XWmkText
 98         {
 99             get
100             {
101                 return base.GetValue(XTextBox.XWmkTextProperty) as String;
102             }
103             set
104             {
105                 base.SetValue(XTextBox.XWmkTextProperty, value);
106             }
107         }
108 
109         /// <summary>
110         /// 公布属性XWmkForeground（水印着色）
111         /// </summary>
112         public Brush XWmkForeground
113         {
114             get
115             {
116                 return base.GetValue(XTextBox.XWmkForegroundProperty) as Brush;
117             }
118             set
119             {
120                 base.SetValue(XTextBox.XWmkForegroundProperty, value);
121             }
122         }
123 
124         /// <summary>
125         /// 公布属性XIsError（是否字段有误）
126         /// </summary>
127         public bool XIsError
128         {
129             get
130             {
131                 return (bool)base.GetValue(XTextBox.XIsErrorProperty);
132             }
133             set
134             {
135                 base.SetValue(XTextBox.XIsErrorProperty, value);
136             }
137         }
138 
139         /// <summary>
140         /// 公布属性XAllowNull（是否允许为空）
141         /// </summary>
142         public bool XAllowNull
143         {
144             get
145             {
146                 return (bool)base.GetValue(XTextBox.XAllowNullProperty);
147             }
148             set
149             {
150                 base.SetValue(XTextBox.XAllowNullProperty, value);
151             }
152         }
153 
154         /// <summary>
155         /// 公布属性XRegExp（正则表达式）
156         /// </summary>
157         public string XRegExp
158         {
159             get
160             {
161                 return base.GetValue(XTextBox.XRegExpProperty) as string;
162             }
163             set
164             {
165                 base.SetValue(XTextBox.XRegExpProperty, value);
166             }
167         }
168         #endregion
169     }
170 }