我的generic.xaml包含以下代码:
<ControlTemplate TargetType="local:customVideoControl">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="600"/>
<RowDefinition Height="200"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="200"/>
<ColumnDefinition Width="200"/>
<ColumnDefinition Width="200"/>
</Grid.ColumnDefinitions>
<MediaElement x:Name="customMediaPlayer" Source="{TemplateBinding CustomMediaSource}"
HorizontalAlignment="Center"
VerticalAlignment="Center"
Height="{TemplateBinding Height}"
Width="{TemplateBinding Width}"
Grid.Row="0" Grid.ColumnSpan="3"
/>
<ToggleButton x:Name="playPauseBtn" Height="50" Width="50" Content="Pause" Grid.Row="1" Grid.Column="0"/>
<Button x:Name="prevBtn" Height="50" Width="50" Content="Prev" Grid.Row="1" Grid.Column="1"/>
<Button x:Name="nextBtn" Height="50" Width="50" Content="Next" Grid.Row="1" Grid.Column="2"/>
</Grid>
</ControlTemplate>
现在在applyTemplate上,我正在访问如下控件:
public override void OnApplyTemplate()
{
base.OnApplyTemplate();
ToggleButton playPauseBtn = GetTemplateChild("playPauseBtn") as ToggleButton;
Button prevBtn= GetTemplateChild("prevBtn") as Button;
Button nextBtn = GetTemplateChild("nextBtn") as Button;
MediaElement customMediaPlayer = GetTemplateChild("customMediaPlayer") as MediaElement;
playPauseBtn.Checked += (obj, Args) =>
{
customMediaPlayer.Pause();
playPauseBtn.Content = "Play";
};
playPauseBtn.Unchecked += (obj, Args) =>
{
customMediaPlayer.Play();
playPauseBtn.Content = "Pause";
};
nextBtn.Click += (obj, Args) =>
{
customMediaPlayer.Source=new Uri(CustomMediaSource.ToString(),UriKind.RelativeOrAbsolute);
};
prevBtn.Click += (obj, Args) =>
{
customMediaPlayer.Source = new Uri(CustomMediaSource.ToString(), UriKind.RelativeOrAbsolute);
};
}
现在我希望在我正在实现的页面中使用nextBtn,如
CustomVideoControl myVControl=new CustomVideoControl();
这将创建控件的实例,但我想在点击时执行某些操作 下一个和上一个按钮,thta存在于generic.xaml中的CustomVideoControl中。任何帮助将不胜感激。
谢谢, Subhen
答案 0 :(得分:1)
您只需向控件添加一些事件即可。
public event EventHandler MovedPrevious
public event EventHandler MovedNext
现在通常这样实现: -
protected virtual void OnMovedPrevious(EventArgs e)
{
var handler = MovedPrevious;
if (handler != null)
handler(this, e);
}
protected virtual void OnMovedNext(EventArgs e)
{
var handler = MovedNext;
if (handler != null)
handler(this, e);
}
现在在您现有的点击事件中: -
nextBtn.Click += (obj, Args) =>
{
customMediaPlayer.Source=new Uri(CustomMediaSource.ToString(),UriKind.RelativeOrAbsolute); //No idea what this doing
OnMovedNext(EventArgs.Empty);
};
prevBtn.Click += (obj, Args) =>
{
customMediaPlayer.Source = new Uri(CustomMediaSource.ToString(), UriKind.RelativeOrAbsolute); //No idea what this is doing either
OnMovedPrevious(EventArgs.Empty);
};
现在,在您的消费代码中,您可以执行以下操作: -
CustomVideoControl myVControl=new CustomVideoControl();
myVControl.MovedNext += (s, args) => { /* deal with next */ };
myVControl.MovedPrevious += (s, args) => { /* deal with previous */ };
答案 1 :(得分:1)
抱歉,但你做错了。 没有充分的理由说明为什么要引用DataTemplate IMO中的元素。 [... Read more at this forum post ...
答案 2 :(得分:0)
您可以在自定义控件中创建公共事件,例如NextButtonClicked和PreviousButtonClicked。
答案 3 :(得分:0)
我有一种感觉,你正试图模仿EventSetter的行为。如果我是对的,请看一下这个简单的例子:
<Style TargetType="{x:Type Button}" x:Key="SomeID">
<Style.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="Cursor" Value="Hand"></Setter>
<Setter Property="FontWeight" Value="Bold"></Setter>
</Trigger>
</Style.Triggers>
<EventSetter Event="MouseUp" Handler="DoSomething_Click"></EventSetter>
</Style>
此代码直接从XAML为您的自定义事件分配一些文本块的常规操作(您不必通过访问控件的属性来污染您的代码)。
我希望这有用,但如果没有,请给我一个大喊。
修改强>
很抱歉没有完全清楚(这只是一个快速粘贴的代码段)。请看一个完整的例子:
下一个/上一个按钮的样式:
<Style TargetType="{x:Type Button}" x:Key="PreviousButtonstyle">
<EventSetter Event="Click" Handler="OnMovedPrevious"></EventSetter>
</Style>
<Style TargetType="{x:Type Button}" x:Key="NextButtonstyle">
<EventSetter Event="Click" Handler="OnMovedNext"></EventSetter>
</Style>
代码背后:
public event EventHandler MovedPrevious;
public event EventHandler MovedNext;
protected void OnMovedPrevious(object sender, RoutedEventArgs e)
{
if (MovedPrevious != null)
{
MovedPrevious(this, e);
}
}
protected void OnMovedNext(object sender, RoutedEventArgs e)
{
if (MovedNext != null)
{
MovedNext(this, e);
}
}
从现在开始,您可以直接从您的控件处理控件/安东尼发布的内容中访问 OnMovedNext 和 OnMovedPrevious 。
很抱歉,如果我之前的回答令人困惑,但它应该只是一个灵感,该怎么办:)
修改强>
我没有注意到这只涉及我向其道歉的Silverlight :)但是,如果您想尝试,它对WPF非常有用。