共用方式為


ObjectManager 類別

定義

警告

Formatter-based serialization is obsolete and should not be used.

在物件還原序列化時保持追蹤。

public ref class ObjectManager
public class ObjectManager
[System.Obsolete("Formatter-based serialization is obsolete and should not be used.", DiagnosticId="SYSLIB0050", UrlFormat="https://aka.ms/dotnet-warnings/{0}")]
public class ObjectManager
[System.Runtime.InteropServices.ComVisible(true)]
public class ObjectManager
type ObjectManager = class
[<System.Obsolete("Formatter-based serialization is obsolete and should not be used.", DiagnosticId="SYSLIB0050", UrlFormat="https://aka.ms/dotnet-warnings/{0}")>]
type ObjectManager = class
[<System.Runtime.InteropServices.ComVisible(true)>]
type ObjectManager = class
Public Class ObjectManager
繼承
ObjectManager
屬性

範例

下列程式碼範例示範如何使用 ObjectManager 類別逐步解說物件圖形,只周遊至每個物件一次。

using System;
using System.Text;
using System.Collections;
using System.Runtime.Serialization;
using System.Reflection;

// This class walks through all the objects once in an object graph.
public sealed class ObjectWalker : IEnumerable, IEnumerator {
   private Object m_current;

   // This stack contains the set of objects that will be enumerated.
   private Stack m_toWalk = new Stack();

   // The ObjectIDGenerator ensures that each object is enumerated just once.
   private ObjectIDGenerator m_idGen = new ObjectIDGenerator();

   // Construct an ObjectWalker passing the root of the object graph.
   public ObjectWalker(Object root) {
      Schedule(root);
   }

   // Return an enumerator so this class can be used with foreach.
   public IEnumerator GetEnumerator() {
      return this;
   }

   // Resetting the enumerator is not supported.
   public void Reset() {
      throw new NotSupportedException("Resetting the enumerator is not supported.");
   }

   // Return the enumeration's current object.
   public Object Current { get { return m_current; } }

   // Walk the reference of the passed-in object.
   private void Schedule(Object toSchedule) {
      if (toSchedule == null) return;

      // Ask the ObjectIDManager if this object has been examined before.
      Boolean firstOccurrence;
      m_idGen.GetId(toSchedule, out firstOccurrence);

      // If this object has been examined before, do not look at it again just return.
      if (!firstOccurrence) return;

      if (toSchedule.GetType().IsArray) {
         // The object is an array, schedule each element of the array to be looked at.
         foreach (Object item in ((Array)toSchedule)) Schedule(item);
      } else {
         // The object is not an array, schedule this object to be looked at.
         m_toWalk.Push(toSchedule);
      }
   }

   // Advance to the next item in the enumeration.
   public Boolean MoveNext() {
      // If there are no more items to enumerate, return false.
      if (m_toWalk.Count == 0) return false;

      // Check if the object is a terminal object (has no fields that refer to other objects).
      if (!IsTerminalObject(m_current = m_toWalk.Pop())) {
         // The object does have field, schedule the object's instance fields to be enumerated.
         foreach (FieldInfo fi in m_current.GetType().GetFields(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic)) {
            Schedule(fi.GetValue(m_current));
         }
      }
      return true;
   }

   // Returns true if the object has no data fields with information of interest.
   private Boolean IsTerminalObject(Object data) {
      Type t = data.GetType();
      return t.IsPrimitive || t.IsEnum || t.IsPointer || data is String;
   }
}

public sealed class App {
   // Define some fields in the class to test the ObjectWalker.
   public String name = "Fred";
   public Int32 Age = 40;

   static void Main() {
      // Build an object graph using an array that refers to various objects.
      Object[] data = new Object[] { "Jeff", 123, 555L, (Byte) 35, new App() };

      // Construct an ObjectWalker and pass it the root of the object graph.
      ObjectWalker ow = new ObjectWalker(data);

      // Enumerate all of the objects in the graph and count the number of objects.
      Int64 num = 0;
      foreach (Object o in ow) {
         // Display each object's type and value as a string.
         Console.WriteLine("Object #{0}: Type={1}, Value's string={2}",
            num++, o.GetType(), o.ToString());
      }
   }
}

// This code produces the following output.
//
// Object #0: Type=App, Value's string=App
// Object #1: Type=System.Int32, Value's string=40
// Object #2: Type=System.String, Value's string=Fred
// Object #3: Type=System.Byte, Value's string=35
// Object #4: Type=System.Int64, Value's string=555
// Object #5: Type=System.Int32, Value's string=123
// Object #6: Type=System.String, Value's string=Jeff

備註

在還原序列化期間,查詢 FormatterObjectManager 判斷序列化資料流程中物件的參考是否參考已還原序列化 (回溯參考) 的物件,或尚未還原序列化 (正向參考) 的物件。 如果序列化資料流程中的參考是正向參考,則 Formatter 可以向 ObjectManager 註冊修正。 如果序列化資料流程中的參考是回溯參考,則 Formatter 會立即完成參考。 修正是指在物件還原序列化程式期間尚未完成完成物件參考的程式。 還原序列化必要物件之後,將會 ObjectManager 完成參考。

ObjectManager遵循一組規則來指定修正順序。 實 ISerializable 作 或 具有 ISerializationSurrogate 的所有物件都可以在還原序列化物件樹狀結構時,讓它們透過 SerializationInfo 傳輸的所有物件都可供使用。 不過,父物件無法假設當其完全還原序列化時,其所有子物件都會完全完成。 所有子物件都會存在,但並非所有的子物件都一定會存在。 如果物件需要採取相依于在其子物件上執行程式碼的特定動作,它可以延遲這些動作、實 IDeserializationCallback 作 介面,並只在呼叫回此介面時執行程式碼。

建構函式

ObjectManager(ISurrogateSelector, StreamingContext)
已淘汰.

初始化 ObjectManager 類別的新執行個體。

方法

DoFixups()
已淘汰.

執行所有記錄的修復。

Equals(Object)
已淘汰.

判斷指定的物件是否等於目前的物件。

(繼承來源 Object)
GetHashCode()
已淘汰.

做為預設雜湊函式。

(繼承來源 Object)
GetObject(Int64)
已淘汰.

傳回具有所指定物件 ID 的物件。

GetType()
已淘汰.

取得目前執行個體的 Type

(繼承來源 Object)
MemberwiseClone()
已淘汰.

建立目前 Object 的淺層複製。

(繼承來源 Object)
RaiseDeserializationEvent()
已淘汰.

引發還原序列化事件至任何實作 IDeserializationCallback 的已登錄物件。

RaiseOnDeserializingEvent(Object)
已淘汰.

叫用 (Invoke) 以 OnDeserializingAttribute 標記的方法。

RecordArrayElementFixup(Int64, Int32, Int64)
已淘汰.

記錄陣列中單一元素的修復。

RecordArrayElementFixup(Int64, Int32[], Int64)
已淘汰.

記錄陣列中指定之元素的修復,以便稍後執行。

RecordDelayedFixup(Int64, String, Int64)
已淘汰.

記錄物件成員的修復,以便稍後執行。

RecordFixup(Int64, MemberInfo, Int64)
已淘汰.

記錄物件成員的修復,以便稍後執行。

RegisterObject(Object, Int64)
已淘汰.

在物件還原序列化時登錄該物件,將它與 objectID 相關聯。

RegisterObject(Object, Int64, SerializationInfo)
已淘汰.

在物件還原序列化時登錄該物件,將它與 objectID 相關聯,並記錄和它一起使用的 SerializationInfo

RegisterObject(Object, Int64, SerializationInfo, Int64, MemberInfo)
已淘汰.

在物件還原序列化時登錄該物件,將它與 objectID 相關聯,並記錄 SerializationInfo

RegisterObject(Object, Int64, SerializationInfo, Int64, MemberInfo, Int32[])
已淘汰.

當物件還原序列化時,登錄物件中所包含的陣列成員,將它與 objectID 相關聯,並記錄 SerializationInfo

ToString()
已淘汰.

傳回代表目前物件的字串。

(繼承來源 Object)

適用於