ItemFieldDictionary 類別

表示項目及其相關聯的欄位。

命名空間: Microsoft.Synchronization.SimpleProviders
組件: Microsoft.Synchronization.SimpleProviders (在 microsoft.synchronization.simpleproviders.dll)

語法

'宣告
<DefaultMemberAttribute("Item")> _
Public Class ItemFieldDictionary
    Implements IDictionary(Of UInteger, ItemField), ICollection(Of KeyValuePair(Of UInteger, ItemField)), _
    IEnumerable(Of KeyValuePair(Of UInteger, ItemField)), IEnumerable
'用途
Dim instance As ItemFieldDictionary

[DefaultMemberAttribute("Item")] 
public class ItemFieldDictionary : IDictionary<uint,ItemField>, ICollection<KeyValuePair<uint,ItemField>>, 
    IEnumerable<KeyValuePair<uint,ItemField>>, IEnumerable

[DefaultMemberAttribute(L"Item")] 
public ref class ItemFieldDictionary : IDictionary<unsigned int, ItemField^>, ICollection<KeyValuePair<unsigned int, ItemField^>>, 
    IEnumerable<KeyValuePair<unsigned int, ItemField^>>, IEnumerable

/** @attribute DefaultMemberAttribute("Item") */ 
public class ItemFieldDictionary implements IDictionary<UInt32,ItemField>, 
    ICollection<KeyValuePair<UInt32,ItemField>>, IEnumerable<KeyValuePair<UInt32,ItemField>>, IEnumerable

DefaultMemberAttribute("Item") 
public class ItemFieldDictionary implements IDictionary<uint,ItemField>, 
    ICollection<KeyValuePair<uint,ItemField>>, IEnumerable<KeyValuePair<uint,ItemField>>, IEnumerable

備註

許多簡單提供者方法會使用 ItemFieldDictionary 物件來儲存和傳遞會在變更套用到目的地時識別項目的 ItemField 物件。

範例

下列程式碼範例針對將項目儲存在記憶體中存放區的範例應用程式示範 EnumerateItems 方法的實作。CreateItemFieldDictionary 方法是範例方法，它會針對存放區中的每一項目建立並傳回 ItemFieldDictionary 物件。若要在完整應用程式的內容中檢視這段程式碼，請參閱 Sync Framework SDK 及 Code Gallery 中的 "Sync101 using Simple Sync Provider" 應用程式。

public override void EnumerateItems(FullEnumerationContext context)
{
    List<ItemFieldDictionary> items = new List<ItemFieldDictionary>();
    foreach (ulong id in _store.Ids)
    {
        items.Add(_store.CreateItemFieldDictionary(id));
    }
    context.ReportItems(items);
}

public ItemFieldDictionary CreateItemFieldDictionary(ulong id)
{
    ItemFieldDictionary itemFields = null;

    if (_store.ContainsKey(id))
    {
        itemFields = new ItemFieldDictionary();
        itemFields.Add(new ItemField(MyFullEnumerationSimpleSyncProvider.CUSTOM_FIELD_ID, typeof(ulong), id));
        itemFields.Add(new ItemField(MyFullEnumerationSimpleSyncProvider.CUSTOM_FIELD_TIMESTAMP, typeof(ulong), _store[id].TimeStamp));
    }
    else
    {
        throw new Exception("Item does not exist in store");
    }

    return itemFields;
}

Public Overrides Sub EnumerateItems(ByVal context As FullEnumerationContext)
    Dim items As New List(Of ItemFieldDictionary)()
    For Each id As ULong In _store.Ids
        items.Add(_store.CreateItemFieldDictionary(id))
    Next
    context.ReportItems(items)
End Sub
Public Function CreateItemFieldDictionary(ByVal id As ULong) As ItemFieldDictionary
    Dim itemFields As ItemFieldDictionary = Nothing

    If _store.ContainsKey(id) Then
        itemFields = New ItemFieldDictionary()
        itemFields.Add(New ItemField(MyFullEnumerationSimpleSyncProvider.CUSTOM_FIELD_ID, GetType(ULong), id))
        itemFields.Add(New ItemField(MyFullEnumerationSimpleSyncProvider.CUSTOM_FIELD_TIMESTAMP, GetType(ULong), _store(id).TimeStamp))
    Else
        Throw New Exception("Item does not exist in store")
    End If

    Return itemFields
End Function

繼承階層

System.Object
  Microsoft.Synchronization.SimpleProviders.ItemFieldDictionary

執行緒安全性

任何公用靜態 (共用 在 Visual Basic) 此型別的成員具備執行緒安全。不保證任何執行個體成員安全執行緒。

請參閱

參考

ItemFieldDictionary 成員
Microsoft.Synchronization.SimpleProviders 命名空間