I have a UserControl which is so defined
<UserControl x:Class="Controls.wTextBox"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:local="clr-namespace:Controls"
xmlns:sys="clr-namespace:System;assembly=mscorlib"
mc:Ignorable="d"
d:DesignHeight="20" d:DesignWidth="150" Height="20" Width="150" BorderThickness="1" BorderBrush="LightGray" x:Name="PART_UserControl" Background="White">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<TextBox Grid.Column="0" HorizontalAlignment="Stretch" VerticalAlignment="Center" BorderBrush="Transparent" BorderThickness="0" Name="PART_TextBox">
<TextBox.Style>
<Style TargetType="TextBox">
<Style.Triggers>
<Trigger Property="Text" Value="{x:Static sys:String.Empty}">
<Setter Property="Background">
<Setter.Value>
<VisualBrush AlignmentX="Left" AlignmentY="Center" Stretch="None">
<VisualBrush.Visual>
<Label Foreground="DarkGray" Content="????"/>
</VisualBrush.Visual>
</VisualBrush>
</Setter.Value>
</Setter>
</Trigger>
<Trigger Property="Text" Value="{x:Null}">
<Setter Property="Background">
<Setter.Value>
<VisualBrush AlignmentX="Left" AlignmentY="Center" Stretch="None">
<VisualBrush.Visual>
<Label Foreground="DarkGray" Content="{Binding HintText, ElementName=PART_UserControl}"/>
</VisualBrush.Visual>
</VisualBrush>
</Setter.Value>
</Setter>
</Trigger>
<Trigger Property="IsKeyboardFocused" Value="True">
<Setter Property="Background" Value="White" />
</Trigger>
</Style.Triggers>
</Style>
</TextBox.Style>
</TextBox>
<Button Grid.Column="1" Click="OnButtonClick" Width="18" BorderBrush="Transparent" BorderThickness="0" HorizontalContentAlignment="Center" VerticalContentAlignment="Center" HorizontalAlignment="Center" VerticalAlignment="Center" Height="18" Focusable="False">
<Button.Content>
<Path Stretch="Fill" Fill="#000000" Margin="2" Data="M29.898 26.5722l-4.3921 0c-0.0118,-0.635 -0.0177,-1.0172 -0.0177,-1.1583 0,-1.4229 0.2352,-2.5929 0.7056,-3.5102 0.4704,-0.9231 1.417,-1.952 2.8281,-3.1044 1.4111,-1.1465 2.2578,-1.8991 2.5282,-2.2578 0.4292,-0.5585 0.6409,-1.1818 0.6409,-1.8579 0,-0.9408 -0.3763,-1.7463 -1.1289,-2.4224 -0.7526,-0.6703 -1.7639,-1.0054 -3.0397,-1.0054 -1.2289,0 -2.2578,0.3527 -3.0868,1.0524 -0.8232,0.6997 -1.3935,1.7698 -1.7051,3.2044l-4.4391 -0.5527c0.1234,-2.0578 0.9995,-3.8041 2.6223,-5.2387 1.6286,-1.4346 3.757,-2.152 6.4029,-2.152 2.7752,0 4.9859,0.7291 6.6322,2.1814 1.6404,1.4522 2.4635,3.1397 2.4635,5.0741 0,1.0642 -0.3057,2.0755 -0.9054,3.028 -0.6056,0.9525 -1.8933,2.2519 -3.8688,3.8923 -1.0231,0.8525 -1.6581,1.5346 -1.905,2.052 -0.2469,0.5174 -0.3587,1.4405 -0.3351,2.7752zm-4.3921 6.5087l0 -4.8389 4.8389 0 0 4.8389 -4.8389 0z"/>
</Button.Content>
</Button>
</Grid>
using System;
using System.ComponentModel;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Input;
using System.Windows.Media;
namespace Controls
{
/// <summary>
/// Interaktionslogik für wTextBox.xaml
/// </summary>
public partial class wTextBox : UserControl, INotifyPropertyChanged
{
/// <summary>
/// Event, das ausgelöst wird, wenn sich eine Property ändert.
/// </summary>
public event PropertyChangedEventHandler PropertyChanged;
#region "DependencyProperties"
/// <summary>
/// Bindungsproperty für den Wert, der in der TextBox angezeigt wird
/// </summary>
public static DependencyProperty ValueProperty;
public static DependencyProperty DisplayTextProperty;
public static DependencyProperty HintTextProperty;
public static DependencyProperty HintTextColorProperty;
public static DependencyProperty ShowHintTextProperty;
#endregion
/// <summary>
/// Wert der TextBox
/// </summary>
public object Value
{
get { return (object)this.GetValue(wTextBox.ValueProperty); }
set { this.SetValue(wTextBox.ValueProperty, value); this.OnPropertyChanged("Value"); this.OnPropertyChanged("DisplayText"); this.OnPropertyChanged("HintText"); }
}
public string DisplayText
{
get { return (Value == null) ? "" : Value.ToString(); }
set { this.SetValue(wTextBox.ValueProperty, value); this.OnPropertyChanged("Value"); this.OnPropertyChanged("DisplayText"); this.OnPropertyChanged("HintText"); }
}
public string HintText
{
get { return (string)this.GetValue(wTextBox.HintTextProperty); }
set { this.SetValue(wTextBox.HintTextProperty, value); this.OnPropertyChanged("HintText"); }
}
public Brush HintTextColor
{
get { return (Brush)this.GetValue(wTextBox.HintTextColorProperty); }
set { this.SetValue(wTextBox.HintTextColorProperty, value); this.OnPropertyChanged("HintTextColor"); }
}
static wTextBox()
{
ValueProperty = DependencyProperty.RegisterAttached("Value", typeof(object), typeof(wTextBox), new PropertyMetadata(""));
DisplayTextProperty = DependencyProperty.RegisterAttached("DisplayText", typeof(object), typeof(wTextBox), new PropertyMetadata(""));
HintTextProperty = DependencyProperty.RegisterAttached("HintText", typeof(string), typeof(wTextBox), new PropertyMetadata(""));
HintTextColorProperty = DependencyProperty.RegisterAttached("HintTextColor", typeof(Brush), typeof(wTextBox), new PropertyMetadata(new SolidColorBrush(Colors.LightGray)));
}
public wTextBox()
{
InitializeComponent();
this.PART_TextBox.DataContext = this;
this.MouseEnter += OnMouseEnterHover;
this.MouseLeave += OnMouseLeaveHover;
}
protected void SetBorderColor(bool IsHoverColor)
{
if (IsHoverColor)
{
this.BorderBrush = new SolidColorBrush(Colors.DarkBlue);
}
else
{
if(!this.PART_TextBox.IsFocused)
this.BorderBrush = new SolidColorBrush(Colors.LightGray);
}
}
private void OnMouseLeaveHover(object sender, MouseEventArgs e)
{
wTextBox tbObjekt = sender as wTextBox;
if (tbObjekt != null)
{
tbObjekt.SetBorderColor(false);
}
}
private void OnMouseEnterHover(object sender, MouseEventArgs e)
{
wTextBox tbObjekt = sender as wTextBox;
if (tbObjekt != null)
{
tbObjekt.SetBorderColor(true);
}
}
/// <summary>
/// Methode, von jedem Setter einer Property aufgerufen werden muss
/// </summary>
/// <param name="propertyName">Name der Property</param>
public void OnPropertyChanged(string propertyName)
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
}
}
/// <summary>
/// Methode die ausgeführt wird, wenn der Button gedrückt wird
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void OnButtonClick(object sender, RoutedEventArgs e)
{
}
}
}
In the wTextBox Class is a DependencyProperty HintText to which I want to bind the content of the Label. Can someone tell me how I have to define the binding?
I tried it with
Content="{Binding ElementName=PART_UserControl, Path=HintText}" and
Content="{Binding HintText, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type local:wTextBox}}}"
Both do not seem to work
