应用到: CRM 2015 on-prem, CRM Online
Gets whether the item of metadata has changed.
命名空间: Microsoft.Xrm.Sdk.Metadata
程序集: Microsoft.Xrm.Sdk (在 Microsoft.Xrm.Sdk.dll 中)
语法
声明
<DataMemberAttribute(Order:=60)> _
Public Property HasChanged As Nullable(Of Boolean)
[DataMemberAttribute(Order=60)]
public Nullable<bool> HasChanged { get; set; }
属性值
Type: 可为空值<布尔值>
true if metadata item has changed since the last query; otherwise, false.
备注
When metadata is retrieved using RetrieveMetadataChangesRequest, with a valid ClientVersionStamp parameter, the RetrieveMetadataChangesResponse. EntityMetadata property contains an EntityMetadataCollection of all the changed metadata. When a child item has changed but a parent item has not, the HasChanged property of the child will be true but for the parent it will be false.
It is not valid to use this attribute as part of a query because the value is calculated. The value will be null except in the results of a query that returns information about changes from a previous query.
线程安全性
此类型的所有公共静态（Visual Basic 中的 Shared）成员都是线程安全成员。不保证任何实例成员是线程安全成员。
平台
开发平台
Windows Vista、Windows Server 2003 和
目标平台
Windows Vista,Windows XP
另请参阅
参考
MetadataBase 类
MetadataBase 成员
Microsoft.Xrm.Sdk.Metadata 命名空间
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