Je vyžadována podpora jazyka JavaScript
Některé stránky na tomto webu vyžadují podporu jazyka JavaScript. Váš webový prohlížeč jazyk JavaScript nepodporuje nebo jazyk JavaScript není povolen.
Chcete-li zjistit, zda webový prohlížeč podporuje jazyk JavaScript nebo jazyk JavaScript chcete povolit, přečtěte si nápovědu k vašemu webovému prohlížeči.
SetterValueBindingHelper.cs
Download fileToto je zdrojový kód souboru SetterValueBindingHelper.cs
Class that implements a workaround for a Silverlight XAML parser limitation that prevents the following syntax from working:
// Copyright (C) Microsoft Corporation. All Rights Reserved. // This code released under the terms of the Microsoft Public License // (Ms-PL, http://opensource.org/licenses/ms-pl.html). using System; using System.Collections.Generic; using System.Collections.ObjectModel; using System.Diagnostics.CodeAnalysis; using System.Globalization; using System.Linq; using System.Reflection; using System.Windows; using System.Windows.Controls; using System.Windows.Data; using System.Windows.Markup; namespace IMP.Windows.Controls { /// <summary> /// Class that implements a workaround for a Silverlight XAML parser /// limitation that prevents the following syntax from working: /// <Setter Property="IsSelected" Value="{Binding IsSelected}"/>. /// </summary> [ContentProperty("Values")] public class SetterValueBindingHelper { /// <summary> /// Gets or sets an optional type parameter used to specify the type /// of an attached DependencyProperty as an assembly-qualified name, /// full name, or short name. /// </summary> [SuppressMessage("Microsoft.Naming", "CA1721:PropertyNamesShouldNotMatchGetMethods", Justification = "Unambiguous in XAML.")] public string Type { get; set; } /// <summary> /// Gets or sets a property name for the normal/attached /// DependencyProperty on which to set the Binding. /// </summary> public string Property { get; set; } /// <summary> /// Gets or sets a Binding to set on the specified property. /// </summary> public Binding Binding { get; set; } /// <summary> /// Gets a Collection of SetterValueBindingHelper instances to apply /// to the target element. /// </summary> /// <remarks> /// Used when multiple Bindings need to be applied to the same element. /// </remarks> public Collection<SetterValueBindingHelper> Values { get { //Defer creating collection until needed if (_values == null) { _values = new Collection<SetterValueBindingHelper>(); } return _values; } } /// <summary> /// Backing store for the Values property. /// </summary> private Collection<SetterValueBindingHelper> _values; /// <summary> /// Gets the value of the PropertyBinding attached DependencyProperty. /// </summary> /// <param name="element">Element for which to get the property.</param> /// <returns>Value of PropertyBinding attached DependencyProperty.</returns> [SuppressMessage("Microsoft.Design", "CA1011:ConsiderPassingBaseTypesAsParameters", Justification = "SetBinding is only available on FrameworkElement.")] public static SetterValueBindingHelper GetPropertyBinding(FrameworkElement element) { if (element == null) { throw new ArgumentNullException("element"); } return (SetterValueBindingHelper)element.GetValue(PropertyBindingProperty); } /// <summary> /// Sets the value of the PropertyBinding attached DependencyProperty. /// </summary> /// <param name="element">Element on which to set the property.</param> /// <param name="value">Value forPropertyBinding attached DependencyProperty.</param> [SuppressMessage("Microsoft.Design", "CA1011:ConsiderPassingBaseTypesAsParameters", Justification = "SetBinding is only available on FrameworkElement.")] public static void SetPropertyBinding(FrameworkElement element, SetterValueBindingHelper value) { if (null == element) { throw new ArgumentNullException("element"); } element.SetValue(PropertyBindingProperty, value); } /// <summary> /// PropertyBinding attached DependencyProperty. /// </summary> public static readonly DependencyProperty PropertyBindingProperty = DependencyProperty.RegisterAttached("PropertyBinding", typeof(SetterValueBindingHelper), typeof(SetterValueBindingHelper), new PropertyMetadata(null, OnPropertyBindingPropertyChanged)); /// <summary> /// Change handler for the PropertyBinding attached DependencyProperty. /// </summary> /// <param name="d">Object on which the property was changed.</param> /// <param name="e">Property change arguments.</param> private static void OnPropertyBindingPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) { // Get/validate parameters var element = (FrameworkElement)d; var item = (SetterValueBindingHelper)e.NewValue; if (null != item) { // Item value present if ((null == item.Values) || (0 == item.Values.Count)) { // No children; apply the relevant binding ApplyBinding(element, item); } else { // Apply the bindings of each child foreach (var child in item.Values) { if ((null != item.Property) || (null != item.Binding)) { throw new ArgumentException( "A SetterValueBindingHelper with Values may not have its Property or Binding set."); } if (0 != child.Values.Count) { throw new ArgumentException( "Values of a SetterValueBindingHelper may not have Values themselves."); } ApplyBinding(element, child); } } } } /// <summary> /// Applies the Binding represented by the SetterValueBindingHelper. /// </summary> /// <param name="element">Element to apply the Binding to.</param> /// <param name="item">SetterValueBindingHelper representing the Binding.</param> private static void ApplyBinding(FrameworkElement element, SetterValueBindingHelper item) { if ((null == item.Property) || (null == item.Binding)) { throw new ArgumentException( "SetterValueBindingHelper's Property and Binding must both be set to non-null values."); } // Get the type on which to set the Binding Type type = null; if (null == item.Type) { // No type specified; setting for the specified element type = element.GetType(); } else { // Try to get the type from the type system type = System.Type.GetType(item.Type); if (null == type) { // Search for the type in the list of assemblies foreach (var assembly in AssembliesToSearch) { // Match on short or full name type = assembly.GetTypes() .Where(t => (t.FullName == item.Type) || (t.Name == item.Type)) .FirstOrDefault(); if (null != type) { // Found; done searching break; } } if (null == type) { // Unable to find the requested type anywhere throw new ArgumentException( string.Format( CultureInfo.CurrentCulture, "Unable to access type \"{0}\". Try using an assembly qualified type name.", item.Type)); } } } // Get the DependencyProperty for which to set the Binding DependencyProperty property = null; var field = type.GetField( item.Property + "Property", BindingFlags.FlattenHierarchy | BindingFlags.Public | BindingFlags.Static); if (null != field) { property = field.GetValue(null) as DependencyProperty; } if (null == property) { // Unable to find the requsted property throw new ArgumentException( string.Format( CultureInfo.CurrentCulture, "Unable to access DependencyProperty \"{0}\" on type \"{1}\".", item.Property, type.Name)); } // Set the specified Binding on the specified property element.SetBinding(property, item.Binding); } /// <summary> /// Gets a sequence of assemblies to search for the provided type name. /// </summary> private static IEnumerable<Assembly> AssembliesToSearch { get { // Start with the System.Windows assembly (home of all core controls) yield return typeof(Control).Assembly; #if SILVERLIGHT && !WINDOWS_PHONE // Fall back by trying each of the assemblies in the Deployment's Parts list foreach (var part in Deployment.Current.Parts) { var streamResourceInfo = Application.GetResourceStream(new Uri(part.Source, UriKind.Relative)); using (var stream = streamResourceInfo.Stream) { yield return part.Load(stream); } } #endif } } } }