Field Element for Protocol/Fields (ADF)

Provides a location for defining one protocol header field.

语法

<NotificationClasses>
    <NotificationClass>
        ...
        <Protocols>
            <Protocol>
                <Fields>
                    <Field>

Element Characteristics

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

Element Relationships

Relationship	Elements
Parent element	Fields Element for Protocol (ADF)
Child elements	FieldName Element for Protocol/Fields/Field (ADF) –and– SqlExpression Element for Protocol/Fields/Field (ADF) –or– FieldReference Element (ADF)

备注

A Field element contains a FieldName element and either a SqlExpression element or a FieldReference element. The FieldName and SqlExpression combination enables you to use a Transact-SQL expression to define the protocol field value. The FieldName and FieldReference combination enables you to use a value from the notification as the protocol field value.

The following field names are reserved by Notification Services:

• DeliveryChannelName
• DeliveryStatusCode
• DeviceAddress
• DeviceName
• DeviceTypeName
• DistributorWorkItemId
• ExpirationTime
• LinkNotificationId
• NotificationId
• NotificationBatchId
• SentTime
• SubscriberId
• SubscriberLocale

The NotificationId, SubscriberId, DeviceName, DeviceTypeName, DeviceAddress, and SubscriberLocale fields are exposed by Notification Services, and can be used in the Transact-SQL expressions for protocol fields.

示例

The following example shows how to use a Transact-SQL expression as the value for the Subject field. The Transact-SQL expression creates a string containing the current date.

<Field>
    <FieldName>Subject</FieldName>
    <SqlExpression>'Your notification for : ' + 
    CONVERT(NVARCHAR(30), GETDATE())</SqlExpression>
</Field>

The following example shows how to use a field reference as a protocol field value.

<Field>
    <FieldName>StockSymbol</FieldName>
    <FieldReference>StockSymbol</FieldReference>
</Field>

请参阅

参考

Application Definition File Reference

其他资源

指定传递协议名称和字段
更新实例和应用程序

帮助和信息

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