DataContext.ChangeConflicts 属性

获取对象的集合，表示当前客户端的值与当前列表项中的字段的数据库值之间的差别。

命名空间：  Microsoft.SharePoint.Linq
程序集：  Microsoft.SharePoint.Linq（位于 Microsoft.SharePoint.Linq.dll 中）

语法

声明
Public Property ChangeConflicts As ChangeConflictCollection
    Get
    Friend Set
用法
Dim instance As DataContext
Dim value As ChangeConflictCollection

value = instance.ChangeConflicts

public ChangeConflictCollection ChangeConflicts { get; internal set; }

属性值

类型：Microsoft.SharePoint.Linq.ChangeConflictCollection
每个成员表示差异ChangeConflictCollection 。

备注

至少一个成员属性也表示最后一次调用SubmitChanges()时检测到并发冲突。除非至少一个并发冲突时，则不会填充ChangeConflicts ： 当前进程检索到的字段中的当前数据库值和上次的值之间的差异。如果发现冲突， SubmitChanges()还填充ChangeConflicts的对象表示的当前客户端的值和当前的数据库值之间的任何差异。

通常情况下，您的代码将捕捉ChangeConflictException和ChangeConflictscatch （在 Visual Basic 中的Catch ） 块中差异。

示例

以下是如何在catch块中使用ChangeConflicts属性的一个示例。

foreach (TeamMember teamMember in teamSite.TeamMembers)
{
    teamMember.TopTask = "Fiscal Planning";
}

try 
{
    teamSite.SubmitChanges(ConflictMode.ContinueOnConflict);
}
catch (ChangeConflictException e) 
{
    foreach (ObjectChangeConflict changedListItem in teamSite.ChangeConflicts)
    {
        // If another user has changed properties of a non-manager,
        // leave that other user’s changes, except for the TopTask field.
        if (((TeamMember)changedListItem.Object).IsManager = false)
        {        
             foreach (MemberChangeConflict changedField in changedListItem.MemberConflicts)
            {
                if (changedField.Member.Name == "TopTask")
                {
                    changedField.Resolve(RefreshMode.KeepCurrentValues);
                }
                else
                {
                    changedField.Resolve(RefreshMode.OverwriteCurrentValues);
                }
            }
        }
        // But if another user has changed properties of a manager, let this
        // process’s changes override the other user’s changes.
        else
        {
            changedListItem.Resolve(RefreshMode.KeepCurrentValues);
        }    
    }

    teamSite.SubmitChanges();
} // end catch

For Each teamMember As TeamMember In teamSite.TeamMembers
    teamMember.TopTask = "Fiscal Planning"
Next teamMember

Try
    teamSite.SubmitChanges(ConflictMode.ContinueOnConflict)
Catch e As ChangeConflictException
    For Each changedListItem As ObjectChangeConflict In teamSite. ChangeConflicts
        ' If another user has changed properties of a non-manager,
        ' leave that other user’s changes, except for the TopTask field.
        If Not (CType(changedListItem.Object, TeamMember)).IsManager Then
             For Each changedField As MemberChangeConflict In changedListItem.MemberConflicts
                If changedField.Member.Name = "TopTask" Then
                    changedField.Resolve(RefreshMode.KeepCurrentValues)
                Else
                    changedField.Resolve(RefreshMode.OverwriteCurrentValues)
                End If
             Next changedField
        ' But if another user has changed properties of a manager, let this
        ' process’s changes override the other user’s changes.
        Else
            changedListItem.Resolve(RefreshMode.KeepCurrentValues)
        End If
    Next changedListItem

    teamSite.SubmitChanges()
End Try ' end catch

另请参阅

引用

DataContext 类

DataContext 成员

Microsoft.SharePoint.Linq 命名空间