在前面CodeSmith 使用教程(6): 基本语法-声明和使用属性 介绍了CodeSmith中使用属性的基本方法,模板中的属性是通过Property指令来定义。
CodeSmith 也支持使用XML文档来定义属性,可以把一些配置属性定义到XML文件中,定义XML的属性是使用XmlProperty来定义:
<%@ XmlProperty Name="PurchaseOrder" Schema="PO.xsd" Optional="False" Category="Data" Description="Purchase Order to generate packing list for." %>
XmlProperty 指令可以有多个参数,除Name为必须的外,其它的参考都是可选的。
属性参数的介绍:
XmlDocument实例。
使用CodeSmith自带的一个例子,使用PurchaseOrder.xsd ,XML 的定义如下:
<?xml version="1.0" encoding="utf-8"?> <xs:schema targetNamespace="http://www.codesmithtools.com/purchaseorder" elementFormDefault="qualified" xmlns="http://www.codesmithtools.com/purchaseorder" xmlns:xs="http://www.w3.org/2001/XMLSchema"> <xs:element name="PurchaseOrder"> <xs:complexType> <xs:sequence> <xs:element name="OrderDate" type="xs:string" minOccurs="1" maxOccurs="1" /> <xs:element name="SubTotal" type="xs:string" minOccurs="1" maxOccurs="1" /> <xs:element name="ShipCost" type="xs:string" minOccurs="0" maxOccurs="1" /> <xs:element name="TotalCost" type="xs:string" minOccurs="1" maxOccurs="1" /> <xs:element name="ShipTo" minOccurs="0" maxOccurs="1"> <xs:complexType> <xs:sequence> <xs:element name="Line1" type="xs:string" minOccurs="0" maxOccurs="1" /> <xs:element name="City" type="xs:string" minOccurs="0" maxOccurs="1" /> <xs:element name="State" type="xs:string" minOccurs="0" maxOccurs="1" /> <xs:element name="Zip" type="xs:string" minOccurs="0" maxOccurs="1" /> </xs:sequence> <xs:attribute name="Name" type="xs:string" /> </xs:complexType> </xs:element> <xs:element name="Items" minOccurs="0" maxOccurs="1"> <xs:complexType> <xs:sequence> <xs:element name="OrderedItem" minOccurs="0" maxOccurs="unbounded"> <xs:complexType> <xs:sequence> <xs:element name="ItemName" type="xs:string" minOccurs="1" maxOccurs="1" /> <xs:element name="Description" type="xs:string" minOccurs="0" maxOccurs="1" /> <xs:element name="UnitPrice" type="xs:string" minOccurs="1" maxOccurs="1" /> <xs:element name="Quantity" type="xs:string" minOccurs="1" maxOccurs="1" /> <xs:element name="LineTotal" type="xs:string" minOccurs="1" maxOccurs="1" /> </xs:sequence> </xs:complexType> </xs:element> </xs:sequence> </xs:complexType> </xs:element> </xs:sequence> </xs:complexType> </xs:element> </xs:schema>
与这个XML Schema配合使用的用来存放XML属性的XML文件为SamplePurchaseOrder.xml ,其定义如下:
<?xml version="1.0"?> <PurchaseOrder xmlns="http://www.codesmithtools.com/purchaseorder"> <ShipTo Name="Eric J. Smith"> <Line1>123 Test Dr.</Line1> <City>Dallas</City> <State>TX</State> <Zip>75075</Zip> </ShipTo> <OrderDate>05-01-2003</OrderDate> <Items> <OrderedItem> <ItemName>Item #1</ItemName> <Description>Item #1 Description</Description> <UnitPrice>5.45</UnitPrice> <Quantity>3</Quantity> <LineTotal>16.35</LineTotal> </OrderedItem> <OrderedItem> <ItemName>Item #2</ItemName> <Description>Item #2 Description</Description> <UnitPrice>12.75</UnitPrice> <Quantity>8</Quantity> <LineTotal>102.00</LineTotal> </OrderedItem> </Items> <SubTotal>45.23</SubTotal> <ShipCost>5.23</ShipCost> <TotalCost>50.46</TotalCost> </PurchaseOrder>
定义一个简单的模板,把SamplePurchaseOrder.xml 中的内容重新输出,可以在代码模板中定义一个XMLProperty ,其Schema 指定为PurchaseOrder.xsd
<%-- This template demonstates using the XmlProperty directive --%> <%@ CodeTemplate Language="C#" TargetLanguage="Text" Description="Demonstrates using the Xml serializer." %> <%@ XmlProperty Name="MyPurchaseOrder" Schema="PurchaseOrder.xsd" Default="SamplePurchaseOrder.xml" %> This file generated by CodeSmith on <%= DateTime.Now.ToLongDateString() %> PurchaseOrder: Address: Name: <%= MyPurchaseOrder.ShipTo.Name %> Line1: <%= MyPurchaseOrder.ShipTo.Line1 %> City: <%= MyPurchaseOrder.ShipTo.City %> State: <%= MyPurchaseOrder.ShipTo.State %> Zip: <%= MyPurchaseOrder.ShipTo.Zip %> OrderDate: <%= MyPurchaseOrder.OrderDate %> Items: <% for (int i = 0; i < MyPurchaseOrder.Items.Count; i++) { %> <%= i %>: ItemName: <%= MyPurchaseOrder.Items[i].ItemName %> Description: <%= MyPurchaseOrder.Items[i].Description %> UnitPrice: <%= MyPurchaseOrder.Items[i].UnitPrice %> Quantity: <%= MyPurchaseOrder.Items[i].Quantity %> LineTotal: <%= MyPurchaseOrder.Items[i].LineTotal %> <% } %> SubTotal: <%= MyPurchaseOrder.SubTotal %> ShipCost: <%= MyPurchaseOrder.ShipCost %> TotalCost: <%= MyPurchaseOrder.TotalCost %>
模板中定义的XML属性名为MyPurchaseOrder 对应的Schema为PurchaseOrder.xsd ,因此在代码模板可以通过MyPurchaseOrder.ShipTo.Name 的格式来直接引用XML Schema中定义的元素,CoddSmith也支持IntelliSense。
运行该模板,首先需要为MyPurchaseOrder选择合适的XML文件:
如果选择的文件不符合指定的XML Schema,CodeSmith不允许选择该文件,使用预先定义的SamplePurchaseOrder.xml ,生成的文件如下:
This file generated by CodeSmith on Saturday, 12 January 2013 PurchaseOrder: Address: Name: Eric J. Smith Line1: 123 Test Dr. City: Dallas State: TX Zip: 75075 OrderDate: 05-01-2003 Items: 0: ItemName: Item #1 Description: Item #1 Description UnitPrice: 5.45 Quantity: 3 LineTotal: 16.35 1: ItemName: Item #2 Description: Item #2 Description UnitPrice: 12.75 Quantity: 8 LineTotal: 102.00 SubTotal: 45.23 ShipCost: 5.23 TotalCost: 50.46