我必须填充一个树形视图，我已经为其制作了一个自定义集合 以下是自定义集合的类
public class EntityBase : ObservableCollection<object>
{
private string name;
public string Name
{
get { return name; }
set
{
name = value;
InvokePropertyChange(this, new PropertyChangedEventArgs("Name"));
}
}
public event PropertyChangedEventHandler PropertyChanged;
public void InvokePropertyChange(object sender, PropertyChangedEventArgs e)
{
if (PropertyChanged != null)
{
PropertyChanged(sender, e);
}
}
}
public class ParentX : EntityBase // Should be the root of my XML
{
}
public class Parent : EntityBase
{
private ChildC _childC;
public ChildC ChildC
{
get { return _childC; }
set { _childC = value; }
}
}
public class ChildA : EntityBase
{
}
public class ChildB : EntityBase
{
}
public class ChildC : EntityBase
{
private ObservableCollection<ChildB> children = new ObservableCollection<ChildB>();
public ObservableCollection<ChildB> Children
{
get { return children; }
set { children = value; }
}
}
以下是我如何按层次顺序填充数据，以便填充异质树...
public class DataBase
{
public ObservableCollection<object> GetData()
{
ChildB childB1 = new ChildB { Name = "Parent 1 - ChildB 1" };
ChildB childB2 = new ChildB { Name = "Parent 1 - ChildB 2" };
ChildA childA1 = new ChildA { childB1, childB2 }; // ChildA will have ChildB objects as its child
childA1.Name = "Parent 1 - ChildA 1";
ChildC childC = new ChildC{Name="CHildC"};
for (int i = 0; i < 5; i++)
{
childC.Children.Add(new ChildB{Name="Pappu" + i}); // childC children Property will have childB Object
}
Parent parent1 = new Parent {childC, childA1}; // Parent class will have ChildC and ChildA as its child
parent1.Name = "Parent1";
//Family 2
ParentX parentX=new ParentX{Name="Parent"};
parentX.Add(parent1); //ParentX will have Parent as its child
return new ObservableCollection<object> { parentX };
}
}
这是我正在使用的序列化代码.....
using (FileStream fileStream=new FileStream(@"D:\text.xml",FileMode.Create))
{
XmlSerializer xmlSerializer = new XmlSerializer(typeof(ParentX), new Type[] { typeof(Parent), typeof(ChildA), typeof(ChildC), typeof(ChildB)});
if (data != null) xmlSerializer.Serialize(fileStream, data);
}
我被困在这.....它没有序列化它给出错误....
{"There was an error generating the XML document."}
"The type HierarchialTreeView.Model.ChildC may not be used in this context."
Plz帮助我被困在这个真正的坏人身上 很难填充所需类型的Heterogenious树视图，现在发生这种情况
谢谢Ne方式......社区非常有帮助:)
编辑：
内部例外：
{“HierarchialTreeView.Model.ChildC类型可能不会在此上下文中使用。”}
内在异常= null
在此之后没有更多的例外....（内在内在的前）
堆栈跟踪（如果有人需要）：
System.InvalidOperationException was unhandled
Message=There was an error generating the XML document.
Source=System.Xml
StackTrace:
at System.Xml.Serialization.XmlSerializer.Serialize(XmlWriter xmlWriter, Object o, XmlSerializerNamespaces namespaces, String encodingStyle, String id)
at System.Xml.Serialization.XmlSerializer.Serialize(Stream stream, Object o, XmlSerializerNamespaces namespaces)
at System.Xml.Serialization.XmlSerializer.Serialize(Stream stream, Object o)
at HierarchialTreeView.MainWindow.Button_Click(Object sender, RoutedEventArgs e)
at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
at System.Windows.UIElement.RaiseEvent(RoutedEventArgs e)
at System.Windows.Controls.Primitives.ButtonBase.OnClick()
at System.Windows.Controls.Button.OnClick()
at System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonUp(MouseButtonEventArgs e)
at System.Windows.UIElement.OnMouseLeftButtonUpThunk(Object sender, MouseButtonEventArgs e)
at System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)
at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
at System.Windows.UIElement.ReRaiseEventAs(DependencyObject sender, RoutedEventArgs args, RoutedEvent newEvent)
at System.Windows.UIElement.OnMouseUpThunk(Object sender, MouseButtonEventArgs e)
at System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)
at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
at System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args)
at System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted)
at System.Windows.Input.InputManager.ProcessStagingArea()
at System.Windows.Input.InputManager.ProcessInput(InputEventArgs input)
at System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport)
at System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel)
at System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, WindowMessage msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
at System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)
at System.Windows.Threading.Dispatcher.InvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)
at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)
at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame)
at System.Windows.Threading.Dispatcher.Run()
at System.Windows.Application.RunDispatcher(Object ignore)
at System.Windows.Application.RunInternal(Window window)
at System.Windows.Application.Run(Window window)
at System.Windows.Application.Run()
at HierarchialTreeView.App.Main()
at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()
InnerException: System.InvalidOperationException
Message=The type HierarchialTreeView.Model.ChildC may not be used in this context.
Source=System.Xml
StackTrace:
at System.Xml.Serialization.XmlSerializationWriter.WriteTypedPrimitive(String name, String ns, Object o, Boolean xsiType)
at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriterParentX.Write1_Object(String n, String ns, Object o, Boolean isNullable, Boolean needType)
at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriterParentX.Write1_Object(String n, String ns, Object o, Boolean isNullable, Boolean needType)
at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriterParentX.Write2_ArrayOfAnyType(Object o)
InnerException:
答案 0 :(得分：0)
以下是可以序列化的父/子节点层次结构的示例。请注意使用公共类Entity，它既用于ObservableCollections又用作Node的基类。实体上使用 XmlInclude属性来提醒序列化程序如何处理作为节点的实体。
另请注意，此example在另一个层次结构中显示XmlInclude用法。
控制台输出和序列化XML包含在下面。
using System;
using System.Diagnostics;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Collections.Specialized;
using System.IO;
using System.Xml.Serialization;
namespace StackoverflowSerializingHierarchy
{
// Use System.Xml.Serialization.XmlInclude attribute to let
// serialize know how to handle an Entity that is a Node
[XmlInclude(typeof(Node))]
public abstract class Entity : INotifyPropertyChanged
{
// INotifyPropertyChanged implementation
public event PropertyChangedEventHandler PropertyChanged;
protected void OnPropertyChanged(string name)
{
PropertyChangedEventHandler handler = PropertyChanged;
if (handler != null)
{
handler(this, new PropertyChangedEventArgs(name));
}
}
// Name Property
private string _name;
public string Name
{
get {
return _name;
}
set {
if (value == null)
value = String.Empty;
if (String.IsNullOrEmpty(_name) || !_name.Equals(value)) {
_name = value;
OnPropertyChanged("Name");
}
}
}
}
// use a Node class to represent an Entity that can have children
public class Node : Entity
{
public Node() : base()
{
PropertyChanged += DataBase.DataPropertyChanged;
}
// Children property is an observable collection of the common base class Entity
private ObservableCollection<Entity> _children;
public ObservableCollection<Entity> Children
{
get
{
return this._children;
}
set
{
this._children = value;
if (this._children != null)
{
this._children.CollectionChanged += DataBase.DataCollectionChanged;
}
}
}
}
class Util
{
public static void SerializeObjectToXML<T>(T item, string FilePath)
{
XmlSerializer xs = new XmlSerializer(typeof(T));
using (StreamWriter wr = new StreamWriter(FilePath))
{
xs.Serialize(wr, item);
}
}
}
public class DataBase
{
public static void DataCollectionChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e)
{
string name = "N/A";
if (sender is Entity) // will be called for EntityBase and ObservableCollection<ChildB> via ChildC
{
name = ((Entity)sender).Name;
}
Console.WriteLine("Collection changed: performed {0} on ({1}) of type {2}", e.Action, name, sender.GetType().Name);
}
public static void DataPropertyChanged(object sender, PropertyChangedEventArgs e)
{
if (sender is Entity && e.PropertyName == "Name")
{
string name = ((Entity)sender).Name;
Console.WriteLine("Data Property Changed {0} to ({1}) on type {2}", e.PropertyName, name, sender.GetType().Name);
}
}
public Node GetData()
{
Node childB1 = new Node { Name = "Parent 1 - ChildB 1" };
Node childB2 = new Node { Name = "Parent 1 - ChildB 2" };
Node childA1 = new Node { Name = "Parent 1 - ChildA 1",
Children = new ObservableCollection<Entity>{childB1, childB2 }};
// ChildA will have ChildB objects as its child
Node childC = new Node { Name = "ChildC", Children = new ObservableCollection<Entity>()};
for (int i = 0; i < 5; i++)
{
//childC.
childC.Children.Add(new Node { Name = "Pappu" + i }); // childC children Property will have childB Object
}
Node parent1 = new Node { Name = "Parent 1",
Children = new ObservableCollection<Entity>{ childC, childA1 }};
//Family 2
Node parentX = new Node { Name = "Parent", Children = new ObservableCollection<Entity> { parent1} };
return parentX;
}
}
class Program
{
static void Main(string[] args)
{
DataBase db = new DataBase();
Node data = db.GetData();
Util.SerializeObjectToXML<Node>(data, @"d:\tmp\test.txt");
}
}
}
控制台输出：
Data Property Changed Name to (Parent 1 - ChildB 1) on type Node
Data Property Changed Name to (Parent 1 - ChildB 2) on type Node
Data Property Changed Name to (Parent 1 - ChildA 1) on type Node
Data Property Changed Name to (ChildC) on type Node
Data Property Changed Name to (Pappu0) on type Node
Collection changed: performed Add on (N/A) of type ObservableCollection`1
Data Property Changed Name to (Pappu1) on type Node
Collection changed: performed Add on (N/A) of type ObservableCollection`1
Data Property Changed Name to (Pappu2) on type Node
Collection changed: performed Add on (N/A) of type ObservableCollection`1
Data Property Changed Name to (Pappu3) on type Node
Collection changed: performed Add on (N/A) of type ObservableCollection`1
Data Property Changed Name to (Pappu4) on type Node
Collection changed: performed Add on (N/A) of type ObservableCollection`1
Data Property Changed Name to (Parent 1) on type Node
Data Property Changed Name to (Parent) on type Node
Press any key to continue . . .
序列化XML输出文件：
<?xml version="1.0" encoding="utf-8"?>
<Node xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<Name>Parent</Name>
<Children>
<Entity xsi:type="Node">
<Name>Parent 1</Name>
<Children>
<Entity xsi:type="Node">
<Name>ChildC</Name>
<Children>
<Entity xsi:type="Node">
<Name>Pappu0</Name>
</Entity>
<Entity xsi:type="Node">
<Name>Pappu1</Name>
</Entity>
<Entity xsi:type="Node">
<Name>Pappu2</Name>
</Entity>
<Entity xsi:type="Node">
<Name>Pappu3</Name>
</Entity>
<Entity xsi:type="Node">
<Name>Pappu4</Name>
</Entity>
</Children>
</Entity>
<Entity xsi:type="Node">
<Name>Parent 1 - ChildA 1</Name>
<Children>
<Entity xsi:type="Node">
<Name>Parent 1 - ChildB 1</Name>
</Entity>
<Entity xsi:type="Node">
<Name>Parent 1 - ChildB 2</Name>
</Entity>
</Children>
</Entity>
</Children>
</Entity>
</Children>
</Node>