我想用图片填充下拉框(Combo)。它的定义如下:
<ComboBox SelectedItem="{Binding SelectedLangComboItem}"
ItemsSource="{Binding Languages}">
<ComboBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<Image Source="{Binding Image}" />
<TextBlock Text="{Binding Label}" />
</StackPanel>
</DataTemplate>
</ComboBox.ItemTemplate>
</ComboBox>
其中项是LanguageItem类:
public class LanguageItem
{
public System.Drawing.Bitmap Image { get; set; }
public string Label { get; set; }
public string Culture { get; set; }
public LanguageItem(System.Drawing.Bitmap image, string label, string culture)
{
Image = image;
Label = label;
Culture = culture;
}
}
现在,在我的ViewModel构造函数中,我这样做:
_Languages = new ObservableCollection<LanguageItem>();
System.Reflection.Assembly app = System.Reflection.Assembly.GetExecutingAssembly();
System.IO.Stream file;
file = app.GetManifestResourceStream("MyNamespace.Images.FLAG1.gif");
_Languages.Add(new LanguageItem(new Bitmap(file), "ITALIAN", "it-IT"));
file = app.GetManifestResourceStream("MyNamespace.Images.FLAG2.gif");
_Languages.Add(new LanguageItem(new Bitmap(file), "ENGLISH", "en-EN"));
this.SelectedLangItem = _Languages[0];
这些图片是嵌入式资源。我有两个问题:
- 图片没有显示出来;
项目未被选择,SelectedLangItem为:
public LanguageItem SelectedLangItem { get { return _SelectedLangItem; } set { if (_SelectedLangItem == value) return;
_SelectedLangItem = value; this.RaisePropertyChanged("SelectedLangItem"); } }
Image
属性返回一个来自WinForms的System.Drawing.Bitmap
。如果该属性返回一个WPFImageSource
,这将正常工作。 - Abe Heidebrecht