FilterChange 类

表示有关导致某项移入或移出筛选器的变更的信息。

命名空间：  Microsoft.Synchronization
程序集：  Microsoft.Synchronization（在 Microsoft.Synchronization.dll 中）

语法

声明
Public Class FilterChange
用法
Dim instance As FilterChange

public class FilterChange

public ref class FilterChange

type FilterChange =  class end

public class FilterChange

注释

变更可导致项移入或移出筛选器。例如，项包含一个 state 字段，筛选器要排除任何 state 字段等于“Washington”的项。当 state 等于“Washington”的项发生变更，使 state 等于“Oregon”时，该项将移入筛选器。

可根据下表解释此对象的属性。

IsMoveIn 的值	MoveVersion 的值	含义
True	项的创建版本。	该项从其创建起就在筛选器中。
True	项的创建版本以外的版本。	如果对 MoveVersion 的版本进行了任何更改，则该项将移入筛选器。
False	设置为 0。	该项从开始筛选器跟踪起就未在筛选器中。
False	0 之外的版本。	如果对 MoveVersion 的版本进行了任何变更，则该项将移出筛选器。

示例

下面的示例在与筛选器相关的项的移动版本不包含在目标知识中时，向 ItemChange 对象添加筛选器变更信息。

Public Sub AddFilterChanges(ByVal filterKeyMap As FilterKeyMap, ByVal itemMeta As ItemMetadata, ByVal destKnowledge As SyncKnowledge, ByVal itemChange As ItemChange)
    For filterKey As Integer = 0 To filterKeyMap.Count - 1
        ' Find the filter in the list of all filters tracked by this replica.
        Dim iFilter As Integer = 0
        While iFilter < _trackedFilters.Count
            If filterKeyMap(filterKey).IsIdentical(_trackedFilters(iFilter)) Then
                Exit While
            End If
            iFilter += 1
        End While

        ' Get the filter information for the item and add it to the ItemChange object.
        Dim moveVersion As SyncVersion = GetMoveVersion(itemMeta, iFilter)

        ' Only return a filter change if the destination knowledge does not contain the version of the 
        ' last move that occurred in relation to the specified filter.
        Dim filterChange As FilterChange = Nothing
        If Not destKnowledge.Contains(ContactReplicaMetadata.ReplicaId, itemMeta.GlobalId, moveVersion) Then
            filterChange = New FilterChange(GetIsInFilter(itemMeta, iFilter), moveVersion)
            itemChange.AddFilterChange(CUInt(filterKey), filterChange)
        End If
    Next
End Sub

public void AddFilterChanges(FilterKeyMap filterKeyMap, ItemMetadata itemMeta, SyncKnowledge destKnowledge,
    ItemChange itemChange)
{
    for (int filterKey = 0; filterKey < filterKeyMap.Count; filterKey++)
    {
        // Find the filter in the list of all filters tracked by this replica.
        int iFilter = 0;
        for (; iFilter < _trackedFilters.Count; iFilter++)
        {
            if (filterKeyMap[filterKey].IsIdentical(_trackedFilters[iFilter]))
            {
                break;
            }
        }

        // Get the filter information for the item and add it to the ItemChange object.
        SyncVersion moveVersion = GetMoveVersion(itemMeta, iFilter);

        // Only return a filter change if the destination knowledge does not contain the version of the 
        // last move that occurred in relation to the specified filter.
        FilterChange filterChange = null;
        if (!destKnowledge.Contains(ContactReplicaMetadata.ReplicaId, itemMeta.GlobalId, moveVersion))
        {
            filterChange = new FilterChange(GetIsInFilter(itemMeta, iFilter), moveVersion);
            itemChange.AddFilterChange((uint)filterKey, filterChange);
        }
    }
}

继承层次结构

System. . :: . .Object
  Microsoft.Synchronization..::..FilterChange

线程安全

此类型的所有公共成员static（在 Visual Basic 中为 Shared） 都是线程安全的。不保证所有实例成员都是线程安全的。

请参阅

参考

FilterChange 成员

Microsoft.Synchronization 命名空间