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FieldType Element for SubscriptionClass/Schema/Field (ADF)

Specifies the SQL Server data type for a subscription field.

語法

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

Element Characteristics

Characteristic Description

Data type

string, between 1 and 255 characters in length.

Default value

None.

Occurrence

Required once per Field element.

Updates

Can be modified, but not added or deleted, when updating the application.

Element Relationships

Relationship Elements

Parent element

Field Element for SubscriptionClass/Schema (ADF)

Child elements

None.

備註

FieldType values must conform to SQL Server data types. The following data types are supported by Notification Services:

bigint

float

real

tinyint

binary

int

smalldatetime

uniqueidentifier

bit

money

smallint

varbinary

char

nchar

smallmoney

varchar

datetime

nvarchar

sql_variant

xml

decimal

numeric

 

 

The text, ntext, and image data types are not supported because they cannot be used as values for parameters and variables in stored procedures. In addition, the timestamp data type is not supported. For more information about SQL Server data types, see 資料類型 (Database Engine).

If using the xml data type with the XSLT content formatter, set the content formatter's DisableEscaping argument to false so that the content formatter does not attempt to transform the XML markup.

If you update a FieldType element, updating the application re-creates the subscription class to which it corresponds. Notification Services renames the existing subscription tables by appending Old to the name and then creates new subscription tables. 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 更新應用程式.

範例

The following example specifies a subscription field data type of money.

<FieldType>money</FieldType>

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參考

Application Definition File Reference

其他資源

定義訂閱結構描述
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說明及資訊

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