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:
本例使用 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,本例使用预先定义的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
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