WPF框架，先記錄簡單資料型態ObservableCollection<string>的關聯方式，較複雜的ObservableCollection<INotifyPropertyChanged>之後補充
以商品的買賣別舉例，將買賣列舉建立到動態資料集(ObservableCollection<string>)內，再與下拉式選單(ComboBox)建立關聯資料檢視
XAML:
<Label Content="買賣別" HorizontalAlignment="Left" Margin="260,10,0,0" VerticalAlignment="Top"/>
<ComboBox x:Name="ComboBoxOrderBuySell" ToolTip="{Binding Path=SelectedValue, RelativeSource={RelativeSource Self}}" HorizontalAlignment="Left" Margin="260,35,0,0" VerticalAlignment="Top" Width="120"/>
C#:
/// <summary>
/// 買賣別
/// </summary>
class OrderBS
{
enum Enum
{
[Description("買")]
Buy, //0
[Description("賣")]
Sell, //1
}
static readonly string[] Description =
{
Enum.Buy.GetDescription(),
Enum.Sell.GetDescription(),
};
}
/// <summary>
/// 取得描述屬性(DescriptionAttribute)
/// </summary>
/// <param name="obj"></param>
/// <returns></returns>
static string GetDescription(this Enum obj)
{
FieldInfo field = obj.GetType().GetField(obj.ToString());
DescriptionAttribute arr = (DescriptionAttribute)Attribute.GetCustomAttribute(field, typeof(DescriptionAttribute), false);
return arr.Description;
}
/// <summary>
/// 取得動態資料集的檢視物件
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="obj"></param>
/// <returns></returns>
static ICollectionView GetView<T>(this ObservableCollection<T> obj)
{
CollectionViewSource vs = new CollectionViewSource() { Source = obj, };
return vs.View;
}
//建立動態資料集，取得資料集的檢視物件，與指定UI建立關聯檢視
static ObservableCollection<T> SetViewAndGetObservation<T>(this ItemsControl obj)
{
ObservableCollection<T> oc = new ObservableCollection<T>();
obj.ItemsSource = oc.GetView();
return oc;
}
//建立動態資料集，取得資料集的檢視物件，與指定UI建立關聯檢視
static ObservableCollection<T> SetViewAndGetObservation<T>(this ItemsControl obj, IEnumerable<T> collection)
{
ObservableCollection<T> oc = new ObservableCollection<T>(collection);
obj.ItemsSource = oc.GetView();
return oc;
}
//ComboBox與買賣列舉建立關聯檢視
ComboBoxOrderBuySell.SetViewAndGetObservation(OrderBS.Description);
ComboBoxOrderBuySell.SelectedIndex = (int)OrderBS.Enum.Buy; //選項給預設值買
繼承ItemsControl的UI都能與動態資料集(ObservableCollection<T>)建立關聯檢視，常見的有
System.Windows.Controls.Menu
System.Windows.Controls.ToolBar
System.Windows.Controls.DataGrid
System.Windows.Controls.ComboBox
System.Windows.Controls.TabControl
System.Windows.Controls.Primitives.StatusBar
System.Windows.Controls.TreeView
之後補充真動態資料ObservableCollection<INotifyPropertyChanged>與DataGrid的範例
達人
