在我的自定义控件的代码后面绑定(bind)数据时遇到问题。显然，我必须使用 Generic.xaml 来设置控件的样式，并且我想绑定(bind)到控件 UserProfile.cs 中的数据。
这是背后的代码:
using System;
using System.Windows;
using System.Windows.Controls;
namespace Controls
{
public class UserProfile : Control
{
static UserProfile()
{
DefaultStyleKeyProperty.OverrideMetadata(typeof(UserProfile),
new FrameworkPropertyMetadata(typeof(UserProfile)));
}
private Double _ProfilePhotoSize = 50;
private Double ProfilePhotoSize
{
get { return _ProfilePhotoSize; }
set
{
if (_ProfilePhotoSize != value)
_ProfilePhotoSize = value;
}
}
}
}
这是带有绑定(bind)的 XAML，删除了最后一部分，因为不需要:
<ResourceDictionary
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:Controls">
<Style TargetType="{x:Type local:NumericUpDown}">
<Style.Resources>
<SolidColorBrush x:Key="colour1" Color="#434953" />
<SolidColorBrush x:Key="colour2" Color="#22252b" />
<SolidColorBrush x:Key="colour3" Color="#606876" />
</Style.Resources>
<Setter Property="Width" Value="85" />
<Setter Property="Margin" Value="5" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type local:NumericUpDown}">
<Border Focusable="{TemplateBinding Focusable}"
Width="{TemplateBinding Width}"
x:Name="Border">
<Grid Focusable="False">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="auto"/>
<ColumnDefinition Width="1*"/>
<ColumnDefinition Width="auto"/>
</Grid.ColumnDefinitions>
<Button x:Name="PART_DecreaseButton"
Grid.Column="0">
<Button.Content>
<Path Data="M0,0 L1,0 0.5,1Z"
Fill="White"
Width="8"
Height="6"
Stretch="Fill"/>
</Button.Content>
<Button.Template>
<ControlTemplate TargetType="Button">
<Border Name="Border"
Background="{DynamicResource colour1}"
Width="25"
Height="25"
CornerRadius="5 0 0 5">
<ContentPresenter />
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter TargetName="Border" Property="Background" Value="{DynamicResource colour3}" />
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Button.Template>
</Button>
<TextBox x:Name="PART_TextBox"
Grid.Column="1"
Foreground="White"
Background="{DynamicResource colour2}"
VerticalContentAlignment="Center"
HorizontalContentAlignment="Center"
HorizontalAlignment="Stretch"
BorderThickness="0"
Focusable="False" Text="0" />
<Button x:Name="PART_IncreaseButton"
Grid.Column="2">
<Button.Content>
<Path Data="M0,1 L1,1 0.5,0Z"
Width="8"
Height="6"
Fill="White"
Stretch="Fill" />
</Button.Content>
<Button.Template>
<ControlTemplate TargetType="Button">
<Border Name="Border"
Background="{DynamicResource colour1}"
Width="25"
Height="25"
CornerRadius="0 5 5 0">
<ContentPresenter />
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter TargetName="Border" Property="Background" Value="{DynamicResource colour3}" />
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Button.Template>
</Button>
</Grid>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style TargetType="{x:Type local:UserProfile}">
<Setter Property="DataContext" Value="{x:Type local:UserProfile}" />
<Setter Property="Foreground" Value="White" />
<Setter Property="FontSize" Value="16" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type local:UserProfile}">
<Grid x:Name="circleGrid" Width="{Binding Path=ProfilePhotoSize, RelativeSource={RelativeSource AncestorType={x:Type local:UserProfile}}}">
...
这是我遇到的绑定(bind)错误:
BindingExpression path error: 'ProfilePhotoSize' property not found on 'object' ''UserProfile' (Name='')'. BindingExpression:Path=ProfilePhotoSize; DataItem='UserProfile' (Name=''); target element is 'Grid' (Name='circleGrid'); target property is 'Width' (type 'Double')
编辑:
只是移动了一些代码，现在遇到了代码问题，我想根据用户制作控件的大小来调整边框大小，所以我创建了一个新的类和属性来获取 ProfilePhotoSize 然后将其除以一个数字。
代码隐藏
using System;
using System.ComponentModel;
using System.Windows;
using System.Windows.Controls;
namespace Controls
{
public class UserProfile : Control
{
static UserProfile()
{
DefaultStyleKeyProperty.OverrideMetadata(typeof(UserProfile),
new FrameworkPropertyMetadata(typeof(UserProfile)));
}
}
public class UserProfileData : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
protected virtual void OnPropertyChanged(string propertyName)
{
PropertyChangedEventHandler handler = PropertyChanged;
if (handler != null) handler(this, new PropertyChangedEventArgs(propertyName));
}
private Double _ProfilePhotoSize = 50;
public Double ProfilePhotoSize
{
get { return _ProfilePhotoSize; }
set
{
if (_ProfilePhotoSize != value)
_ProfilePhotoSize = value;
OnPropertyChanged("ProfilePhotoSize");
}
}
private Double _ProfileBorderThickness = 3;
public Double ProfileBorderThickness
{
get { return _ProfileBorderThickness; }
set
{
double x = ProfilePhotoSize / 3;
if (_ProfileBorderThickness != x)
_ProfileBorderThickness = x;
OnPropertyChanged("ProfileBorderThickness");
}
}
}
}
这是 XAML，绑定(bind)不再起作用:S
XAML
<ResourceDictionary
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:Controls">
<Style TargetType="{x:Type local:UserProfile}">
<Setter Property="DataContext" Value="{x:Type local:UserProfile}" />
<Setter Property="Foreground" Value="White" />
<Setter Property="FontSize" Value="16" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type local:UserProfile}">
<Grid x:Name="circleGrid" Width="{Binding ProfilePhotoSize, RelativeSource={RelativeSource AncestorType={x:Type local:UserProfileData}}}">
<Grid.RowDefinitions>
最佳答案
将其更改为公共(public)属性。
private Double _ProfilePhotoSize = 50;
public Double ProfilePhotoSize
{
get { return _ProfilePhotoSize; }
set
{
if (_ProfilePhotoSize != value)
_ProfilePhotoSize = value;
}
}
关于c# - 自定义控件，绑定(bind)到代码隐藏，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/33817591/