我想在鼠标悬停在图像控件上时显示弹出窗口。所以我创建了控件模板，它看起来像这样：
<ControlTemplate x:Key="AvatarImageTemplate" TargetType="{x:Type Image}">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition></ColumnDefinition>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition></RowDefinition>
<RowDefinition></RowDefinition>
</Grid.RowDefinitions>
<HERE I WANT IMAGE SOURCE Grid.Row="0"/>
<Popup IsOpen="False"
Name="OponentImagePopUp"
AllowsTransparency="True"
PopupAnimation="Slide"
HorizontalOffset="-35"
VerticalOffset="0"
Grid.Row="1">
<Border BorderThickness="1"
BorderBrush="Black">
<Grid Height="350" MinWidth="350">
<Grid.Background>
<LinearGradientBrush StartPoint="0,0" EndPoint="0,0.3">
<LinearGradientBrush.GradientStops>
<GradientStop Color="LightGray" Offset="0"/>
<GradientStop Color="WhiteSmoke" Offset="1"/>
</LinearGradientBrush.GradientStops>
</LinearGradientBrush>
</Grid.Background>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="75"></ColumnDefinition>
<ColumnDefinition Width="*"></ColumnDefinition>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="*"></RowDefinition>
</Grid.RowDefinitions>
<Border BorderThickness="1"
BorderBrush="Black"
Background="White"
Margin="4,4,4,4"
Grid.Column="0">
<Image Margin="2,2,2,2">
<Image.Source >
<MultiBinding Converter="{StaticResource avatarConverter}">
<Binding Path="ProfilePhoto"></Binding>
<Binding Path="StatusInfo.IsLogged"></Binding>
</MultiBinding>
</Image.Source>
</Image>
</Border>
</Grid>
</Border>
</Popup>
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter TargetName="OponentImagePopUp" Property="IsOpen" Value="True" />
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
我有两个问题：
我的目标是显示pop弹出窗口，只有更大的相同图像。
修改
我创建简单的控制，作为Glazkov先生的建议，它有图像控制，这就是它：
<UserControl x:Class="Spirit.Controls.AvatarImageControl"
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"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="300">
<Grid>
<Image x:Name="SmallImage"
Source="{Binding ElementName=root, Path=ImageSource}"
Stretch="Fill"/>
</Grid>
</UserControl>
背后的代码是相同的：
public partial class AvatarImageControl : UserControl
{
public AvatarImageControl()
{
InitializeComponent();
}
public ImageSource ImageSource
{
get { return (ImageSource)GetValue(ImageSourceProperty); }
set { SetValue(ImageSourceProperty, value); }
}
public static readonly DependencyProperty ImageSourceProperty =
DependencyProperty.Register("ImageSource", typeof(ImageSource), typeof(AvatarImageControl), new UIPropertyMetadata(null));
}
我尝试在视图中使用此控制：
<Grid Background="#99CCFF" Margin="4,4,4,4">
<Controls:AvatarImageControl ImageSource="{Binding Path=Oponent.Info.ProfilePhoto,Mode=OneWay,UpdateSourceTrigger=PropertyChanged}"/>
</Grid>
我将Uri的属性类型绑定到AvatarImageControl的ImageSource。
我做得不好？
我也是在用户控制中尝试这个：
<Grid>
<Image x:Name="SmallImage"
Source="{Binding Path=ImageSource, Mode=OneWay, UpdateSourceTrigger=PropertyChanged}"
Stretch="Fill"/>
</Grid>
结果相同。
我在视图中使用用户控件，我从视图模型类型的Uri绑定到ImageSource属性。没别了。
编辑2： 格拉兹科夫先生的守则产生例外：
{"Set property 'System.Windows.Controls.Primitives.Popup.IsOpen' threw an exception."}
{"A TwoWay or OneWayToSource binding cannot work on the read-only property 'IsMouseOver' of type 'System.Windows.Controls.Image'."}
StackTrace:
at System.Windows.Markup.XamlReader.RewrapException(Exception e, IXamlLineInfo lineInfo, Uri baseUri)
at System.Windows.Markup.WpfXamlLoader.Load(XamlReader xamlReader, IXamlObjectWriterFactory writerFactory, Boolean skipJournaledProperties, Object rootObject, XamlObjectWriterSettings settings, Uri baseUri)
at System.Windows.Markup.WpfXamlLoader.LoadBaml(XamlReader xamlReader, Boolean skipJournaledProperties, Object rootObject, XamlAccessLevel accessLevel, Uri baseUri)
at System.Windows.Markup.XamlReader.LoadBaml(Stream stream, ParserContext parserContext, Object parent, Boolean closeStream)
at System.Windows.Application.LoadComponent(Object component, Uri resourceLocator)
at Spirit.Controls.AvatarImageControl.InitializeComponent() in c:\Users\Jan\Documents\Visual Studio 2010\Projects\BACKUP\Pokec__Messenger\Spirit_Caliburn_Micro_v1.0\Controls\AvatarImageControl.xaml:line 1
at Spirit.Controls.AvatarImageControl..ctor() in C:\Users\Jan\Documents\Visual Studio 2010\Projects\BACKUP\Pokec__Messenger\Spirit_Caliburn_Micro_v1.0\Controls\AvatarImageControl.xaml.cs:line 24
解决方案是：
<Popup IsOpen="{Binding ElementName=SmallImage, Path=IsMouseOver, Mode=OneWay}">
单向设置绑定模式。
效果很好。
感谢格拉兹科夫先生的帮助。
答案 0 :(得分：9)
您无法为图像控件定义控件模板，因为它不是从Control派生的，因此它没有控件模板。它只是在OnRender方法中呈现自己。
您可以做的是使用一个依赖项属性ImageSource创建一个用户控件。以下是此控件的XAML：
<UserControl x:Class="AvatarImage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
x:Name="root">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition></ColumnDefinition>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition></RowDefinition>
<RowDefinition></RowDefinition>
</Grid.RowDefinitions>
<Image x:Name="SmallImage"
Source="{Binding ElementName=root, Path=ImageSource}"
Grid.Row="0" />
<Popup IsOpen="{Binding ElementName=SmallImage, Path=IsMouseOver, Mode=OneWay, UpdateSourceTrigger=PropertyChanged}"
Name="OponentImagePopUp"
AllowsTransparency="True"
PopupAnimation="Slide"
HorizontalOffset="-35"
VerticalOffset="0"
Grid.Row="1">
<Border BorderThickness="1"
BorderBrush="Black">
<Grid Height="350"
MinWidth="350">
<Grid.Background>
<LinearGradientBrush StartPoint="0,0"
EndPoint="0,0.3">
<LinearGradientBrush.GradientStops>
<GradientStop Color="LightGray"
Offset="0" />
<GradientStop Color="WhiteSmoke"
Offset="1" />
</LinearGradientBrush.GradientStops>
</LinearGradientBrush>
</Grid.Background>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="75"></ColumnDefinition>
<ColumnDefinition Width="*"></ColumnDefinition>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="*"></RowDefinition>
</Grid.RowDefinitions>
<Border BorderThickness="1"
BorderBrush="Black"
Background="White"
Margin="4,4,4,4"
Grid.Column="0">
<Image Margin="2,2,2,2">
<Image.Source>
<MultiBinding Converter="{StaticResource avatarConverter}">
<Binding Path="ProfilePhoto"></Binding>
<Binding Path="StatusInfo.IsLogged"></Binding>
</MultiBinding>
</Image.Source>
</Image>
</Border>
</Grid>
</Border>
</Popup>
</Grid>
</UserControl>
这是背后的代码（AvatarImage.xaml.cs）：
public partial class AvatarImage : UserControl
{
public AvatarImage() {
InitializeComponent();
}
public ImageSource ImageSource {
get { return (ImageSource)GetValue(ImageSourceProperty); }
set { SetValue(ImageSourceProperty, value); }
}
public static readonly DependencyProperty ImageSourceProperty =
DependencyProperty.Register("ImageSource", typeof(ImageSource), typeof(AvatarImage), new UIPropertyMetadata(null));
}
答案 1 :(得分：4)
一般方法：
<CONTROL>
<Grid>
<!-- Actual control content -->
<Popup IsOpen="{Binding RelativeSource={RelativeSource AncestorType=CONTROL}, Path=IsMouseOver, Mode=OneWay}">
<!-- Popup content -->
</Popup>
</Grid>
</CONTROL>
您也可以通过RelativeSource绑定访问图像源，只需搜索祖先类型Image。
编辑：现在您的问题得到了清理，我可以尝试为您的两个具体问题找到一些代码。
编辑2：太慢......