Field Element for SubscriptionClass/Schema (ADF)

Provides a location for defining one subscription class field.

语法

<SubscriptionClasses>
    <SubscriptionClass>
        ...
        <Schema>
            <Field>

Element Characteristics

Characteristic	Description
Data type	None.
Default value	None.
Occurrence	Required once or more per Schema element.
Updates	Can be added and deleted when updating the application.

Element Relationships

Relationship	Elements
Parent element	Schema Element for SubscriptionClass (ADF)
Child elements	FieldName Element for SubscriptionClass/Schema/Field (ADF) FieldType Element for SubscriptionClass/Schema/Field (ADF) FieldTypeMods Element for SubscriptionClass/Schema/Field (ADF)

备注

Notification Services automatically adds SubscriberID, Created, Updated, and Enabled fields to the subscription class schema.

If you add or delete a Field, updating the application re-creates the subscription class to which it corresponds. A new subscription table is created, and the existing subscription table is renamed to SubscriptionTableNameOld. Existing subscription table indexes are left unchanged.

If you want to transfer data between the old and new subscription tables, it must be done manually. For more information, see 更新应用程序.

示例

The following example shows the definition of a SubscriberLocale subscription field.

<Field>
    <FieldName>SubscriberLocale</FieldName>
    <FieldType>nvarchar(10)</FieldType>
    <FieldTypeMods>NOT NULL</FieldTypeMods>
</Field>

请参阅

参考

Application Definition File Reference

其他资源

定义订阅架构
更新实例和应用程序

帮助和信息

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