C# WPF-数据绑定映像源
如何将图像控件数据绑定以自动获取player.PlayerImage更新?正如您从我的代码中看到的,我已经尝试设置数据绑定,但是它不起作用 以下是我当前的设置: 我有一个名为C# WPF-数据绑定映像源,c#,wpf,xaml,data-binding,C#,Wpf,Xaml,Data Binding,如何将图像控件数据绑定以自动获取player.PlayerImage更新?正如您从我的代码中看到的,我已经尝试设置数据绑定,但是它不起作用 以下是我当前的设置: 我有一个名为CDGPlayer的CLR类,它实现了INotifyPropertyChanged CDGPlayer类有一个名为PlayerImage private Image playerImage; public Image PlayerImage { get { return playerImage; } set
CDGPlayer
的CLR类,它实现了INotifyPropertyChanged
CDGPlayer
类有一个名为PlayerImage
private Image playerImage;
public Image PlayerImage
{
get { return playerImage; }
set
{
if (value != playerImage)
{
playerImage = value;
NotifyPropertyChanged("PlayerImage");
}
}
}
我有一个WPF客户端,我想使用CDGPlayer
<Window
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:CDG="clr-namespace:GoldenKaraokeLib.CDG;assembly=GoldenKaraokeLib"
xmlns:local="clr-namespace:GoldenKaraokePlayerWPF"
x:Class="GoldenKaraokePlayerWPF.Window1"
Title="Window1" Height="300" Width="654"
x:Name="CDGPlayerHost" Loaded="CdgPlayerHostLoaded" Background="#FFCD6F6F">
<Window.Resources>
<local:CdgImageConverter x:Key="CDGImageConverter"/>
</Window.Resources>
<Grid>
<Grid.DataContext>
<CDG:CDGPlayer x:Name="player"/>
</Grid.DataContext>
<Border BorderBrush="Black" BorderThickness="5">
<Image x:Name="CDGImage" Source="{Binding PlayerImage, Converter={StaticResource CDGImageConverter}, UpdateSourceTrigger=PropertyChanged}"/>
</Border>
</Grid>
</Window>
我做错了什么?我尝试时,您的绑定似乎是正确的。不过,看起来您的转换器有一个bug。您不会倒带流,因此BitmapImage将尝试从末尾开始读取,而不是从开头开始读取。添加呼叫至:
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
try
{
MemoryStream ms = new MemoryStream();
Image bitmap = value as Image;
BitmapImage bi = new BitmapImage();
if (bitmap != null)
{
bitmap.Save(ms, ImageFormat.Bmp);
bi.BeginInit();
bi.StreamSource = ms;
bi.EndInit();
}
return bi;
}
catch
{
return new BitmapImage();
}
}
if (bitmap != null)
{
bitmap.Save(ms, ImageFormat.Bmp);
ms.Seek(0, SeekOrigin.Begin); // Set position back to the start of the stream
bi.BeginInit();
bi.StreamSource = ms;
bi.EndInit();
}