StringDictionary.SyncRoot 属性


获取可用于同步对 StringDictionary 的访问的对象。Gets an object that can be used to synchronize access to the StringDictionary.

 virtual property System::Object ^ SyncRoot { System::Object ^ get(); };
public virtual object SyncRoot { get; }
member this.SyncRoot : obj
Public Overridable ReadOnly Property SyncRoot As Object



一个可用于同步对 Object 的访问的 StringDictionaryAn Object that can be used to synchronize access to the StringDictionary.


下面的代码示例演示如何使用在 SyncRoot 整个枚举过程中锁定集合。The following code example shows how to lock the collection using the SyncRoot during the entire enumeration.

StringDictionary^ myCollection = gcnew StringDictionary();
bool lockTaken = false;
    Monitor::Enter(myCollection->SyncRoot, lockTaken);
    for each (Object^ item in myCollection)
        // Insert your code here.
    if (lockTaken)
StringDictionary myCollection = new StringDictionary();
    foreach (Object item in myCollection)
        // Insert your code here.
Dim myCollection As New StringDictionary()
SyncLock myCollection.SyncRoot
    For Each item As Object In myCollection
        ' Insert your code here.
    Next item
End SyncLock

检索此属性的值的运算复杂度为 O(1)。Retrieving the value of this property is an O(1) operation.


派生类可以使用属性提供自己的同步版本 StringDictionary SyncRootDerived classes can provide their own synchronized version of the StringDictionary using the SyncRoot property. 同步代码必须对的执行操作 SyncRoot StringDictionary ,而不是直接在上执行操作 StringDictionaryThe synchronizing code must perform operations on the SyncRoot of the StringDictionary, not directly on the StringDictionary. 这样可确保对从其他对象派生的集合正确地执行操作。This ensures proper operation of collections that are derived from other objects. 具体而言,它与可能同时修改对象的其他线程保持正确的同步 StringDictionarySpecifically, it maintains proper synchronization with other threads that might be simultaneously modifying the StringDictionary object.

枚举整个集合本质上不是一个线程安全的过程。Enumerating through a collection is intrinsically not a thread-safe procedure. 即使某个集合已同步,其他线程仍可以修改该集合,这会导致枚举数引发异常。Even when a collection is synchronized, other threads can still modify the collection, which causes the enumerator to throw an exception. 若要确保枚举过程中的线程安全性,可以在整个枚举期间锁定集合,或者捕获由其他线程进行的更改所导致的异常。To guarantee thread safety during enumeration, you can either lock the collection during the entire enumeration or catch the exceptions resulting from changes made by other threads.