The <keyfield> element defines the primary key of the main table.
<keyfield>元素定义了主表格中的主键。

The <keyfield> element is used by the AppML Form Service to define how to update the database.
<keyfield>元素是被AppML表单服务所用来定义数据库的更新方式的。

Note: The primary key field is numeric by default.
注意：主键字段默认为数值型。

Note: When working with AppML HTML forms, you must always define the <maintable> and <keyfield> elements.
注意：当与AppML HTML 表单一起使用时，你必须定义<maintable> 和 <keyfield>元素。

<keyfield> Attributes
<keyfield>属性

The <keyfield> element may have the following attributes:
<keyfield>元素可以包含下面的属性：

Example
案例

<?xml version="1.0" ?>

<appml>

<database>
 <connection>northwind</connection>
 <maintable>suppliers</maintable>
 <keyfield>supplierid</keyfield> <sql> SELECT CompanyName,ContactName,Address,City FROM Suppliers </sql> </database>

<htmllist />
<htmlform />

</appml>

View the output produced by the AppML HTML List and Form Service
查看由AppML HTML 报告服务输出的结果

View the XML source file
查看XML 源文件

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