1

我创建了一个非常简单的用户控件 ImageButton

<UserControl x:Class="SampleApp.Controls.ImageButton"
             Name="ImageButtonControl"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             d:DesignHeight="300"
             d:DesignWidth="300"
             mc:Ignorable="d">
    <Button>
        <Grid>
            <Grid.RowDefinitions>
                <RowDefinition Height="1*" />
                <RowDefinition Height="6*" />
                <RowDefinition Height="2*" />
                <RowDefinition Height="1*" />
            </Grid.RowDefinitions>
            <Image Grid.Row="1" Source="{Binding ElementName=ImageButtonControl, Path=Image}" VerticalAlignment="Stretch" HorizontalAlignment="Center" />
            <TextBlock Grid.Row="2" Text="{Binding ElementName=ImageButtonControl, Path=Text}" VerticalAlignment="Stretch" HorizontalAlignment="Center" />
        </Grid>
    </Button>
</UserControl>

后面有代码:

using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;

namespace SampleApp.Controls
{
    /// <summary>
    /// Interaction logic for ImageButton.xaml
    /// </summary>
    public partial class ImageButton : UserControl
    {
        public ImageButton()
        {
            InitializeComponent();
        }

        public string Text
        {
            get { return (string)GetValue(TextProperty); }
            set { SetValue(TextProperty, value); }
        }

        public static readonly DependencyProperty TextProperty =
          DependencyProperty.Register("Text", typeof(string), typeof(ImageButton), new UIPropertyMetadata(""));

        public ImageSource Image
        {
            get { return (ImageSource)GetValue(ImageProperty); }
            set { SetValue(ImageProperty, value); }
        }

        public static readonly DependencyProperty ImageProperty =
           DependencyProperty.Register("Image", typeof(ImageSource), typeof(ImageButton), new UIPropertyMetadata(null)); 
    }
}

现在我想在我的小示例应用程序中使用它

xmlns:controls="clr-namespace:SampleApp.Controls"

<controls:ImageButton Grid.Row="1"
                              Grid.Column="1"
                              Margin="2"
                              Image="/Images/link.png"
                              Text="DoSomething">
            <i:Interaction.Triggers>
                <i:EventTrigger EventName="Click">
                    <cal:ActionMessage MethodName="DoSomething" />
                </i:EventTrigger>
            </i:Interaction.Triggers>
        </controls:ImageButton>

如果我给它 ax:Name,比如

<controls:ImageButton x:Name="DoSomething" 

例如 DoSomethingDoSomething显示视图时直接调用具有该名称的方法,即当我激活包含该按钮的视图模型时,就像我单击按钮一样(如果它是普通按钮而不是用户控件,它将以这种方式工作),但按钮单击处理程序永远不会在单击时调用。

现在我尝试添加一个 ActionMessage ,如上所示,但它也不起作用......

这里有什么问题?

4

1 回答 1

2

这是因为没有为您的用户控件类型配置约定。您可以通过ConventionManager(请参阅http://caliburnmicro.codeplex.com/wikipage?title=All%20About%20Conventions)添加约定,或者您可以从中派生您的类型Button

您也不能使用自定义用户控件,而只需将图像添加到视图中的Content属性。Button

于 2013-04-05T21:51:41.470 回答