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WPF 使用附加属性增加控件属性

2018-08-15 896
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简介： 原文:WPF 使用附加属性增加控件属性使用附加属性增加控件属性，使得这个附加属性在使用的时候没有局限性，可以在任何的控件中使用它来增加所需要的属性，使得控件的属性使用起来非常灵活   一、自定义附加属性 1 2 3 4 5 6 7 8 9 10 11 ...
原文: WPF 使用附加属性增加控件属性

使用附加属性增加控件属性，使得这个附加属性在使用的时候没有局限性，可以在任何的控件中使用它来增加所需要的属性，使得控件的属性使用起来非常灵活

 

一、自定义附加属性

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using  System;
using  System.Collections.Generic;
using  System.Linq;
using  System.Text;
using  System.Threading.Tasks;
using  System.Windows;
using  System.Windows.Controls;
using  System.Windows.Input;
using  System.Windows.Media;
namespace  Demo3.Control
{
     public  class  ControlAttachProperty
     {
         #region 圆角
 
         public  static  CornerRadius GetCornerRadius(DependencyObject obj)         //注意附加属性定义和依赖属性的不同
         {
             return  (CornerRadius)obj.GetValue(CornerRadiusProperty);  //Obj是使用了附加属性的对象
         }
 
         public  static  void  SetCornerRadius(DependencyObject obj, CornerRadius value)
         {
             obj.SetValue(CornerRadiusProperty, value);
         }
 
         // Using a DependencyProperty as the backing store for CornerRadius.  This enables animation, styling, binding, etc...
         public  static  readonly  DependencyProperty CornerRadiusProperty =
             DependencyProperty.RegisterAttached( "CornerRadius" ,  typeof (CornerRadius),  typeof (ControlAttachProperty),  new  PropertyMetadata( null ));
         
         #endregion
 
         #region 用户头像模板
 
         public  static  ControlTemplate GetIconTemplate(DependencyObject obj)
         {
             return  (ControlTemplate)obj.GetValue(IconTemplateProperty);
         }
 
         public  static  void  SetIconTemplate(DependencyObject obj, ControlTemplate value)
         {
             obj.SetValue(IconTemplateProperty, value);
         }
 
         // Using a DependencyProperty as the backing store for IconTemplate.  This enables animation, styling, binding, etc...
         public  static  readonly  DependencyProperty IconTemplateProperty =
             DependencyProperty.RegisterAttached( "IconTemplate" ,  typeof (ControlTemplate),  typeof (ControlAttachProperty),  new  PropertyMetadata( null ));
 
         #endregion
 
         #region 删除按妞区域模板
 
         public  static  ControlTemplate GetAttachTemplate(DependencyObject obj)
         {
             return  (ControlTemplate)obj.GetValue(AttachTemplateProperty);
         }
 
         public  static  void  SetAttachTemplate(DependencyObject obj, ControlTemplate value)
         {
             obj.SetValue(AttachTemplateProperty, value);
         }
 
         // Using a DependencyProperty as the backing store for AttachTemplate.  This enables animation, styling, binding, etc...
         public  static  readonly  DependencyProperty AttachTemplateProperty =
             DependencyProperty.RegisterAttached( "AttachTemplate" ,  typeof (ControlTemplate),  typeof (ControlAttachProperty),  new  PropertyMetadata( null ));
         
         #endregion
 
         #region 用户名水印
 
         public  static  string  GetUserNameWaterMark(DependencyObject obj)
         {
             return  ( string )obj.GetValue(UserNameWaterMarkProperty);
         }
 
         public  static  void  SetUserNameWaterMark(DependencyObject obj,  string  value)
         {
             obj.SetValue(UserNameWaterMarkProperty, value);
         }
 
         // Using a DependencyProperty as the backing store for UserNameWaterMark.  This enables animation, styling, binding, etc...
         public  static  readonly  DependencyProperty UserNameWaterMarkProperty =
             DependencyProperty.RegisterAttached( "UserNameWaterMark" ,  typeof ( string ),  typeof (ControlAttachProperty),  new  PropertyMetadata( null ));
 
         #endregion
 
         #region 密码水印
 
         public  static  string  GetPasswordWaterMark(DependencyObject obj)
         {
             return  ( string )obj.GetValue(PasswordWaterMarkProperty);
         }
 
         public  static  void  SetPasswordWaterMark(DependencyObject obj,  string  value)
         {
             obj.SetValue(PasswordWaterMarkProperty, value);
         }
 
         // Using a DependencyProperty as the backing store for PasswordWaterMark.  This enables animation, styling, binding, etc...
         public  static  readonly  DependencyProperty PasswordWaterMarkProperty =
             DependencyProperty.RegisterAttached( "PasswordWaterMark" ,  typeof ( string ),  typeof (ControlAttachProperty),  new  PropertyMetadata( null ));
  
         #endregion
 
         #region 用户头像(未被点击时)
 
         public  static  string  GetUserIcon(DependencyObject obj)
         {
             return  ( string )obj.GetValue(UserIconProperty);
         }
 
         public  static  void  SetUserIcon(DependencyObject obj,  string  value)
         {
             obj.SetValue(UserIconProperty, value);
         }
 
         // Using a DependencyProperty as the backing store for UserIcon.  This enables animation, styling, binding, etc...
         public  static  readonly  DependencyProperty UserIconProperty =
             DependencyProperty.RegisterAttached( "UserIcon" ,  typeof ( string ),  typeof (ControlAttachProperty),  new  PropertyMetadata( null ));     
       
         #endregion
 
         #region 用户头像(点击时)
 
         public  static  string  GetUserIconPress(DependencyObject obj)
         {
             return  ( string )obj.GetValue(UserIconPressProperty);
         }
 
         public  static  void  SetUserIconPress(DependencyObject obj,  string  value)
         {
             obj.SetValue(UserIconPressProperty, value);
         }
 
         // Using a DependencyProperty as the backing store for UserIconPress.  This enables animation, styling, binding, etc...
         public  static  readonly  DependencyProperty UserIconPressProperty =
             DependencyProperty.RegisterAttached( "UserIconPress" ,  typeof ( string ),  typeof (ControlAttachProperty),  new  PropertyMetadata( null ));
         
         #endregion
 
         #region 密码图标(未被点击时)
 
         public  static  string  GetPassWordIcon(DependencyObject obj)
         {
             return  ( string )obj.GetValue(PassWordIconProperty);
         }
 
         public  static  void  SetPassWordIcon(DependencyObject obj,  string  value)
         {
             obj.SetValue(PassWordIconProperty, value);
         }
 
         // Using a DependencyProperty as the backing store for PassWordIcon.  This enables animation, styling, binding, etc...
         public  static  readonly  DependencyProperty PassWordIconProperty =
             DependencyProperty.RegisterAttached( "PassWordIcon" ,  typeof ( string ),  typeof (ControlAttachProperty),  new  PropertyMetadata( null ));
        
         #endregion
 
         #region 密码图标(点击时)
 
         public  static  string  GetPasswordIconPress(DependencyObject obj)
         {
             return  ( string )obj.GetValue(PasswordIconPressProperty);
         }
 
         public  static  void  SetPasswordIconPress(DependencyObject obj,  string  value)
         {
             obj.SetValue(PasswordIconPressProperty, value);
         }
 
         // Using a DependencyProperty as the backing store for PasswordIconPress.  This enables animation, styling, binding, etc...
         public  static  readonly  DependencyProperty PasswordIconPressProperty =
             DependencyProperty.RegisterAttached( "PasswordIconPress" ,  typeof ( string ),  typeof (ControlAttachProperty),  new  PropertyMetadata( null ));
   
         #endregion
 
         #region 删除按妞背景图片
 
         public  static  ImageBrush GetDeleteButtonBG(DependencyObject obj)
         {
             return  (ImageBrush)obj.GetValue(DeleteButtonBGProperty);
         }
 
         public  static  void  SetDeleteButtonBG(DependencyObject obj, ImageBrush value)
         {
             obj.SetValue(DeleteButtonBGProperty, value);
         }
 
         // Using a DependencyProperty as the backing store for DeleteButtonBG.  This enables animation, styling, binding, etc...
         public  static  readonly  DependencyProperty DeleteButtonBGProperty =
             DependencyProperty.RegisterAttached( "DeleteButtonBG" ,  typeof (ImageBrush),  typeof (ControlAttachProperty),  new  PropertyMetadata( null ));
 
         #endregion
 
         #region 定义是否开启绑定事件
 
 
         public  static  bool  GetIsCommandClearTextEvent(DependencyObject obj)
         {
             return  ( bool )obj.GetValue(IsCommandClearTextEventProperty);
         }
 
         public  static  void  SetIsCommandClearTextEvent(DependencyObject obj,  bool  value)
         {
             obj.SetValue(IsCommandClearTextEventProperty, value);
         }
 
         // Using a DependencyProperty as the backing store for IsCommandClearTextEvent.  This enables animation, styling, binding, etc...
         public  static  readonly  DependencyProperty IsCommandClearTextEventProperty =
             DependencyProperty.RegisterAttached( "IsCommandClearTextEvent" ,  typeof ( bool ),  typeof (ControlAttachProperty),  new  FrameworkPropertyMetadata( false ,IsCommandClearTextEventChanged));
 
         private  static  void  IsCommandClearTextEventChanged(DependencyObject d,DependencyPropertyChangedEventArgs e)
         {
 
         }
         #endregion
 
         #region 是否显示密码样式
 
         public  static  bool  GetIsVisiblityPassword(DependencyObject obj)
         {
             return  ( bool )obj.GetValue(IsVisiblityPasswordProperty);
         }
 
         public  static  void  SetIsVisiblityPassword(DependencyObject obj,  bool  value)
         {
             obj.SetValue(IsVisiblityPasswordProperty, value);
         }
 
         // Using a DependencyProperty as the backing store for IsVisiblityPassword.  This enables animation, styling, binding, etc...
         public  static  readonly  DependencyProperty IsVisiblityPasswordProperty =
             DependencyProperty.RegisterAttached( "IsVisiblityPassword" ,  typeof ( bool ),  typeof (ControlAttachProperty),  new  PropertyMetadata( false ));
 
         #endregion
 
         #region 清除事件命令
 
         public  static  bool  GetIsClearTextButtonBehaviorEnabled(DependencyObject obj)
         {
             return  ( bool )obj.GetValue(IsClearTextButtonBehaviorEnabledProperty);
         }
 
         public  static  void  SetIsClearTextButtonBehaviorEnabled(DependencyObject obj,  bool  value)
         {
             obj.SetValue(IsClearTextButtonBehaviorEnabledProperty, value);
         }
 
         // Using a DependencyProperty as the backing store for IsClearTextButtonBehaviorEnabled.  This enables animation, styling, binding, etc...
         public  static  readonly  DependencyProperty IsClearTextButtonBehaviorEnabledProperty =
             DependencyProperty.RegisterAttached( "IsClearTextButtonBehaviorEnabled" ,  typeof ( bool ),  typeof (ControlAttachProperty),  new  FrameworkPropertyMetadata( false ,IsClearTextButtonBehaviorEnabledChanged));
 
         /// <summary>
         /// 当附加属性值发生改变时，调用此方法
         /// </summary>
         /// <param name="d"></param>
         /// <param name="e"></param>
         private  static  void  IsClearTextButtonBehaviorEnabledChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
         {
             var  button=d  as  DeleteButton;
             if (e.OldValue != e.NewValue)
             {
                 //当命令触发的时候，会向上传递，而此时这个命令外围就是自己本身
                 button.CommandBindings.Add(ClearTextCommandBinding);
             }
         }
 
         /**
          * 当命令触发的时候，会一级一级向上传递，当传递到命令关联者时，会处理这个命令
          */
 
         /// <summary>
         /// 创建一个命令
         /// </summary>
         public  static  RoutedUICommand ClearTextCommand{ get ; private  set ;}
         
         /// <summary>
         /// 命令绑定关联
         /// </summary>
         private  static  readonly  CommandBinding ClearTextCommandBinding;
 
         private  static  void  ClearButtonClick( object  sender,ExecutedRoutedEventArgs e)
         {
             var  tbox=e.Parameter  as  FrameworkElement;
             if (tbox== null )  return ;
             if (tbox  is  TextBox)
             {
                 ((TextBox)tbox).Clear();
             }
 
             tbox.Focus();
         }
 
         #endregion
 
         static  ControlAttachProperty()
         {
             ClearTextCommand =  new  RoutedUICommand();
 
             ClearTextCommandBinding = new  CommandBinding();
             //将者命令加入到这个命令关联中，如果某个控件调用了这个命令，只要他所在的层级中有关联这个命令关联对象，那么这个命令对象就会对其进行处理
             ClearTextCommandBinding.Command = ClearTextCommand;
             ClearTextCommandBinding.Executed+=ClearButtonClick;
         }
     }
}

　　

在布局文件中使用它

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< Window  x:Class="Demo3.MainWindow"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:c="clr-namespace:Demo3.Control"
         Background="Black"
         Title="MainWindow"
         WindowStartupLocation="CenterScreen"
         Height="350"
         Width="525">
 
     < StackPanel >
         < TextBox  x:Name="UserName"
                  Width="230"
                  Height="38"
                  Margin="0,20,0,0"
                  FontSize="18"
                  VerticalContentAlignment="Center"
                  c:ControlAttachProperty.CornerRadius="5"
                  c:ControlAttachProperty.UserNameWaterMark="用户名"
                  c:ControlAttachProperty.UserIcon="{StaticResource UserName_BG}"
                  c:ControlAttachProperty.UserIconPress="{StaticResource UserName_BG_Press}"
                  c:ControlAttachProperty.DeleteButtonBG="{StaticResource Delete_Button_BG}"
                  c:ControlAttachProperty.IsVisiblityPassword="false"
                  Style="{StaticResource IconClearButtonTextBox}" />
 
         < TextBox  x:Name="Password"
                  Width="230"
                  Height="38"
                  Margin="0,20,0,0"
                  FontSize="18"
                  VerticalContentAlignment="Center"
                  c:ControlAttachProperty.CornerRadius="5"
                  c:ControlAttachProperty.UserNameWaterMark="密码"
                  c:ControlAttachProperty.UserIcon="{StaticResource Password_BG}"
                  c:ControlAttachProperty.UserIconPress="{StaticResource Password_BG_Press}"
                  c:ControlAttachProperty.DeleteButtonBG="{StaticResource Delete_Button_BG}"
                  c:ControlAttachProperty.IsVisiblityPassword="true"
                  Style="{StaticResource IconClearButtonTextBox}" />
     </ StackPanel >      
     
</ Window >

　　

在style文件中进行使用

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< ResourceDictionary  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                     xmlns:c="clr-namespace:Demo3.Control"
                     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
     
     < ResourceDictionary.MergedDictionaries >
         < ResourceDictionary  Source="/Demo3;component/Resources/Style/DeleteButton.xaml" />
     </ ResourceDictionary.MergedDictionaries >
     
     <!--TextBox默认样式-->
     < Style  x:Key="DefaultTextBox" TargetType="{x:Type TextBox}">
         < Setter  Property="ContextMenu" Value="{DynamicResource TextBoxContextMenu}" />
         < Setter  Property="VerticalContentAlignment" Value="Center" />
         < Setter  Property="SnapsToDevicePixels" Value="True" />
         < Setter  Property="Template">
             < Setter.Value >
                 < ControlTemplate  TargetType="{x:Type TextBox}">
                     < Border  x:Name="Bg"
                             SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"
                             CornerRadius="{TemplateBinding c:ControlAttachProperty.CornerRadius}"
                             Background="White"
                             BorderBrush="Transparent"
                             BorderThickness="0">
                         < Grid  x:Name="PART_InnerGrid">
                             < Grid.ColumnDefinitions >
                                 < ColumnDefinition  Width="30"/>
                                 < ColumnDefinition  />
                                 < ColumnDefinition  Width="40"/>
                             </ Grid.ColumnDefinitions >
 
                             <!--用户头像区域-->
                             < ContentControl  x:Name="UserIcon"
                                             Grid.Column="0"
                                             Margin="5"
                                             Template="{TemplateBinding c:ControlAttachProperty.IconTemplate}"
                                             Focusable="False" />
                             
                             <!--文本和水印-->
                             < ScrollViewer  x:Name="PART_ContentHost"
                                           BorderThickness="0"
                                           Grid.Column="1"
                                           IsTabStop="False"
                                           Margin="2"
                                           VerticalAlignment="Stretch"
                                           Background="{x:Null}" />
                             < TextBlock  x:Name="WaterMark"
                                        Grid.Column="1"
                                        VerticalAlignment="Center"
                                        Foreground="Silver"
                                        FontSize="18"
                                        Text="{TemplateBinding c:ControlAttachProperty.UserNameWaterMark}"
                                        Visibility="Collapsed"
                                        Padding="5,0,0,0" />
                             
                             <!-- 删除按钮-->
                             < ContentControl  x:Name="DeleteIcon"
                                             Grid.Column="2"
                                             Width="15"
                                             Height="15"
                                             Margin="0,5,10,5"
                                             Visibility="Visible"
                                             VerticalAlignment="Center"
                                             HorizontalAlignment="Right"
                                             Template="{TemplateBinding c:ControlAttachProperty.AttachTemplate}"
                                             Focusable="False" />
                         </ Grid >
                     </ Border >
                     
                     < ControlTemplate.Triggers >
                         <!--当Text为空时，隐藏删除按钮-->
                         < DataTrigger  Binding="{Binding RelativeSource={RelativeSource Self},Path=Text}" Value="">
                             < Setter  Property="Visibility" TargetName="DeleteIcon" Value="Collapsed" />
                             < Setter  Property="Visibility" TargetName="WaterMark" Value="Visible" />
                         </ DataTrigger >
                         
                         <!--是否显示密码样式-->
                         < Trigger  Property="c:ControlAttachProperty.IsVisiblityPassword" Value="True">
                             < Setter  Property="Height" Value="30"/>
                             < Setter  Property="Foreground" Value="Transparent"></ Setter >
                             < Setter  Property="FontSize" Value="20"></ Setter >
                             < Setter  Property="FontFamily" Value="Courier New"></ Setter >
                             < Setter  Property="TextDecorations">
                                 < Setter.Value >
                                     < TextDecorationCollection >
                                         < TextDecoration >
                                             < TextDecoration.Pen >
                                                 < Pen  Thickness="10"
                                                      Brush="Black"
                                                      EndLineCap="Round"
                                                      StartLineCap="Round"
                                                      DashCap="Round"  >
                                                     < Pen.DashStyle >
                                                         < DashStyle  Dashes="0.0,1.2" Offset="0.6"/>
                                                     </ Pen.DashStyle >
                                                 </ Pen >
                                             </ TextDecoration.Pen >
                                             < TextDecoration.Location >
                                                 < TextDecorationLocation >Strikethrough</ TextDecorationLocation >
                                             </ TextDecoration.Location >
                                         </ TextDecoration >
                                     </ TextDecorationCollection >
                                 </ Setter.Value >
                             </ Setter >
                         </ Trigger >
                     </ ControlTemplate.Triggers >
                 </ ControlTemplate >
             </ Setter.Value >
         </ Setter >
     </ Style >
     
     <!--TextBox包含附加属性Icon,以及ClearText按钮的样式-->
     < Style  x:Key="IconClearButtonTextBox" TargetType="{x:Type TextBox}" BasedOn="{StaticResource DefaultTextBox}">
         <!--设置用户头像模板-->
         < Setter  Property="c:ControlAttachProperty.IconTemplate">
             < Setter.Value >
                 < ControlTemplate  TargetType="ContentControl">
                     < Grid >
                       < Image  x:Name="Bg_HP"
                              Source="{Binding Path=(c:ControlAttachProperty.UserIcon),RelativeSource={RelativeSource Mode=FindAncestor,AncestorType={x:Type TextBox}}}"
                              Visibility="Visible"/>
                       < Image  x:Name="Bg_HP_Press"
                              Source="{Binding Path=(c:ControlAttachProperty.UserIconPress),RelativeSource={RelativeSource Mode=FindAncestor,AncestorType={x:Type TextBox}}}"
                              Visibility="Collapsed" />
                     </ Grid >
                     
                     < ControlTemplate.Triggers >
                         < DataTrigger  Binding="{Binding IsFocused, RelativeSource={RelativeSource FindAncestor,AncestorType={x:Type TextBox}}}" Value="true">
                             < Setter  Property="Visibility" TargetName="Bg_HP" Value="Collapsed" />
                             < Setter  Property="Visibility" TargetName="Bg_HP_Press" Value="Visible" />
                         </ DataTrigger >
                     </ ControlTemplate.Triggers >
                 </ ControlTemplate >
             </ Setter.Value >
         </ Setter >
 
         <!--设置删除按妞模板-->
         < Setter  Property="c:ControlAttachProperty.AttachTemplate">
             < Setter.Value >
                 < ControlTemplate  TargetType="ContentControl">
                     < c:DeleteButton  ButtonBG="{Binding Path=(c:ControlAttachProperty.DeleteButtonBG),RelativeSource={RelativeSource Mode=FindAncestor,AncestorType={x:Type TextBox}}}"
                                     BorderBrush="Transparent"
                                     Style="{StaticResource DeleteButtonStyle}"
                                     BorderThickness="0"
                                     x:Name="CleanButton"
                                     c:ControlAttachProperty.IsClearTextButtonBehaviorEnabled="True"
                                     Command="c:ControlAttachProperty.ClearTextCommand"
                                     CommandParameter="{Binding RelativeSource={RelativeSource FindAncestor,AncestorType={x:Type TextBox}}}"
                                     Focusable="false" />
                     
                     < ControlTemplate.Triggers >
                         < DataTrigger  Binding="{Binding Text,RelativeSource={RelativeSource FindAncestor,AncestorType={x:Type TextBox}}}" Value="">
                             < Setter  Property="Visibility" TargetName="CleanButton" Value="Collapsed" />
                         </ DataTrigger >
                     </ ControlTemplate.Triggers >
                 </ ControlTemplate >
             </ Setter.Value >
         </ Setter >
     </ Style >
</ ResourceDictionary >
文章标签：
数据安全/隐私保护
C#
关键词：
wpf属性
wpf控件
wpf附加
wpf附加属性
杰克.陈
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