vb.net - 从 XSD 创建类并生成 xml
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vb.net - Create Class from XSD and generate xml
提问by Twiebie
i have an xsd file and need to create an xml from it. Some pages assume to use the xsd.exe from Visual Studio. But how do I link the generated class to the xsd, to create xml files from it ?
我有一个 xsd 文件，需要从中创建一个 xml。某些页面假定使用 Visual Studio 中的 xsd.exe。但是如何将生成的类链接到 xsd，以从中创建 xml 文件？
Or is there another way to export values via the xsd schema to an xml file ?
还是有另一种方法可以通过 xsd 模式将值导出到 xml 文件？
回答by Mike Bateman
If you want to create a XML document that is based on a XSD there are a few steps you need to walk through.
如果要创建基于 XSD 的 XML 文档，则需要执行几个步骤。
1) You will need to create .NET classes based on your XSD.
2) You will need to create a new instance of that class and serialize the output.
1) 您需要根据您的 XSD 创建 .NET 类。
2) 您需要创建该类的新实例并序列化输出。
Step 1 - Create a .NET Class from a XSD Document
步骤 1 - 从 XSD 文档创建 .NET 类
A XSD file provides the blue print for a class. Here is a example of a XSD file:
XSD 文件提供类的蓝图。以下是 XSD 文件的示例：
<?xml version="1.0" encoding="utf-8"?>
<xs:schema elementFormDefault="qualified" xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="Person" nillable="true" type="Person" />
<xs:complexType name="Person">
<xs:sequence>
<xs:element minOccurs="0" maxOccurs="1" name="firstName" type="xs:string" />
<xs:element minOccurs="0" maxOccurs="1" name="lastName" type="xs:string" />
<xs:element minOccurs="1" maxOccurs="1" name="dateOfBirth" type="xs:dateTime" />
<xs:element minOccurs="1" maxOccurs="1" name="gender" type="Gender" />
<xs:element minOccurs="1" maxOccurs="1" name="height" type="xs:int" />
<xs:element minOccurs="1" maxOccurs="1" name="weight" type="xs:decimal" />
</xs:sequence>
</xs:complexType>
<xs:simpleType name="Gender">
<xs:restriction base="xs:string">
<xs:enumeration value="Male" />
<xs:enumeration value="Female" />
</xs:restriction>
</xs:simpleType>
</xs:schema>
Create a new folder to work in. I'm using 'C:\STACK'.
Create new text file, copy and paste the XSD into it and save it as 'person.xsd'.
Now we need to use the XSD.exe to convert this file into a class.
You will need to find the XSD exe on your machine, for me it was in:
C:\Program Files (x86)\Microsoft SDKs\Windows\v8.0A\bin\NETFX 4.0 Tools\xsd.exe
创建一个新文件夹以在其中工作。我使用的是“C:\STACK”。
创建新的文本文件，将 XSD 复制并粘贴到其中并将其另存为“person.xsd”。
现在我们需要使用 XSD.exe 将这个文件转换成一个类。
你需要在你的机器上找到 XSD exe，对我来说它在：
C:\Program Files (x86)\Microsoft SDKs\Windows\v8.0A\bin\NETFX 4.0 Tools\xsd.exe
Now open command prompt and enter this
现在打开命令提示符并输入这个
cd "C:\Program Files (x86)\Microsoft SDKs\Windows\v8.0A\bin\NETFX 4.0 Tools"
Now we will create the .NET classes (here is is command broken down)
现在我们将创建 .NET 类（这里是命令分解）
xsd.exe -Execute xsd
/classes -Create Clasess
/language:vb -Language to use (VB, CS, JS)
/out:"c:\stack\" -Output folder
c:\stack\person.xsd -The XSD File to use
Here is the command in one line
这是一行中的命令
xsd.exe c:\stack\person.xsd /classes /language:vb /out:c:\stack\
After you have run this command a new file will be created 'c:\stack\person.vb' You can then add this class into you project.
运行此命令后，将创建一个新文件 'c:\stack\person.vb' 然后您可以将此类添加到您的项目中。
Step 2 - Create a new instance of that class and serialize the output
第 2 步 - 创建该类的新实例并序列化输出
Now that you have added the new class, you can create a instance of it:
现在您已经添加了新类，您可以创建它的一个实例：
Dim person As New Person
person.firstName = "Mike"
person.lastName = "Bateman"
person.gender = Gender.Male
person.height = 160
person.weight = 80.3
Now we can serialize the class to a XML file:
现在我们可以将类序列化为 XML 文件：
Dim serializer As New XmlSerializer(GetType(Person))
Dim writer As New StreamWriter("c:\stack\person.xml")
serializer.Serialize(writer, person)
writer.Close()
And we can read the XML back to a .NET class like this:
我们可以像这样将 XML 读回 .NET 类：
Dim serializer As New XmlSerializer(GetType(Person))
Dim reader As New IO.StreamReader("c:\stack\person.xml")
Dim personRes As Person = serializer.Deserialize(reader)
reader.Close()
reader.Dispose()
Hope that helps!
希望有帮助！
