.NET xsd 导入器创建不可序列化的类 [英] .NET xsd importer creates unserializable class

问题描述

我正在使用 .NET XSD.EXE 导入器生成来自 XSD 文件集合的 C# 类.当我尝试将其中一个类序列化为 XML 时，它失败了(InvalidOperationException)，当我深入研究它时，我发现其中一个创建的类似乎是错误的.

I am using the .NET XSD.EXE importer to generate C# classes from a collection of XSD files. When I tried to serialize one of the classes to XML it failed (InvalidOperationException), and when I dug into it I discovered it one of the created classes appears to be wrong.

这里是相关的 XSD 代码:

Here is the pertinent XSD code:

<xsd:complexType name="SuccessType">
    <xsd:annotation>
        <xsd:documentation>Indicates in a response message that a request was successfully processed.</xsd:documentation>
    </xsd:annotation>
    <xsd:sequence>
        <xsd:element ref="Warnings" minOccurs="0" maxOccurs="unbounded"/>
    </xsd:sequence>
</xsd:complexType>
<!-- .. snip .. -->
<xsd:element name="Warnings" type="WarningsType">
    <xsd:annotation>
        <xsd:documentation>The processing status of a business message and any related warnings or informational messages.</xsd:documentation>
    </xsd:annotation>
</xsd:element>
<!-- .. snip .. -->
<xsd:complexType name="WarningsType">
    <xsd:annotation>
        <xsd:documentation>A collection of warnings generated by the successful processing of a business message.</xsd:documentation>
    </xsd:annotation>
    <xsd:sequence>
        <xsd:element ref="Warning" maxOccurs="unbounded"/>
    </xsd:sequence>
</xsd:complexType>
<!-- .. snip .. -->
<xsd:element name="Warning" type="WarningType">
    <xsd:annotation>
        <xsd:documentation>Defines details of a warning that occurred during message processing.</xsd:documentation>
    </xsd:annotation>
</xsd:element>
<!-- .. snip .. -->
<xsd:complexType name="WarningType">
    <xsd:annotation>
        <xsd:documentation>Defines details of a warning that occurred during message processing.</xsd:documentation>
    </xsd:annotation>
    <xsd:sequence>
        <xsd:element ref="WarningCategory"/>
        <xsd:element ref="WarningCode"/>
        <xsd:element ref="WarningShortMessage"/>
        <xsd:element ref="WarningMessage"/>
    </xsd:sequence>
</xsd:complexType>

下面是从中生成的 C# 代码:

And here is the C# code generated from it:

public partial class SuccessType
{

    private WarningType[][] warningsField;

    /// <remarks/>
    [System.Xml.Serialization.XmlArrayItemAttribute("Warning", typeof(WarningType), IsNullable = false)]
    public WarningType[][] Warnings
    {
        get
        {
            return this.warningsField;
        }
        set
        {
            this.warningsField = value;
        }
    }
}

它使 Warnings 成为 WarningType 数组的数组.当我尝试将其序列化为 XML 时，我得到一个 InvalidOperationException 异常:

It made Warnings an array of an array of WarningType. When I attempt to serialize that to XML I get an InvalidOperationException exception:

• 无法生成临时类 (result=1).
• 错误 CS0030:无法将类型WarningType[]"转换为WarningType"
• 错误 CS0030:无法将类型WarningType[]"转换为WarningType"
• 错误 CS0029:无法将类型WarningType"隐式转换为WarningType[]"
• 错误 CS0029:无法将类型WarningType"隐式转换为WarningType[]"

但是如果我将生成的代码从 WarningType[][] 更改为 WarningType[] 那么它可以很好地序列化.

But if I change the generated code from WarningType[][] to WarningType[] then it serializes fine.

每当我重新生成它时都没有编辑生成的 C# 类(希望以后不会那么频繁)，还有其他解决方案吗?这是 xsd.exe 中的错误还是 XSD 文件不正确?可能是 XmlSerializer 有问题?

Short of editing the generated C# class whenever I regenerate this (which hopefully will be less frequently going forward), is there any other solution? Is this a bug in xsd.exe or is the XSD file incorrect? Maybe there is a problem in the XmlSerializer?

我想要的是正确序列化为针对 XSD 进行验证的 XML 的 C# 代码.现在锯齿状数组似乎是错误的，因为如果我删除它，它就会生成 XML.

What I want is C# code that correctly serializes to XML that validates against the XSD. Right now the jagged array seems to be wrong because if I remove it then it generates the XML.

我正在使用 Visual Studio 2008.

I am using Visual Studio 2008.

推荐答案

xsd.exe工具有bug.我不记得这个特别的，但我记得发现了锯齿状数组的问题，这可能仍然是一个错误.如果您愿意，可以使用 XsdObjbectGen 工具，同样来自 Microsoft，但独立于 .NET SDK 带外发布.

There are bugs in the xsd.exe tool. I don't remember this particular one, but I do remember finding problems with jagged arrays, and it's possible this remains a bug. if you're willing, you could use the XsdObjbectGen tool, also from Microsoft, but released independently and out-of-band from the .NET SDK.

您可以做的一件事是反其道而行之:编写 C# 代码，然后使用 xsd.exe 生成架构，看看有什么不同.xsd.exe 可能希望架构具有特定的外观，以便为锯齿状数组正确生成正确的代码.

One thing you could do is go the reverse direction: write the C# code, then generate the schema with xsd.exe, and see what is different. It's possible xsd.exe wants the schema to look a particular way, in order to correctly generate correct code for jagged arrays.

实际上，在重新阅读您的问题后，您从未说出您真正想要的内容.您是否希望 SuccessType 包含数组数组?

Actually, upon re-reading your question, you never said what you really wanted. Do you want SuccessType to contain an array-of-arrays, or not?

它是 WarningsType 还是 WarningType?您提供的代码片段之间存在一些分歧.

And is it WarningsType or WarningType? There's some disagreement between the code snips you provided.

假设您想要数组数组，我编写了以下 C# 代码:

Assuming you wanted the array-of-arrays, I wrote this C# code:

public class WarningType
{
    public String oof;
}


public partial class SuccessType
{
    private WarningType[][] warningsField;

    /// <remarks/>
    [System.Xml.Serialization.XmlArrayItemAttribute("Warning", typeof(WarningType[]), IsNullable = false)]
    public WarningType[][] Warnings
    {
        get
        {
            return this.warningsField;
        }
        set
        {
            this.warningsField = value;
        }
    }
}

... 然后将其编译为 DLL.然后我在那个 DLL 上运行 xsd.exe，并生成了这个 XSD:

... then compiled it into a DLL. Then I ran xsd.exe on that DLL, and generated this XSD:

<xs:schema elementFormDefault="qualified" xmlns:xs="http://www.w3.org/2001/XMLSchema">
  <xs:element name="WarningType" nillable="true" type="WarningType" />
  <xs:complexType name="WarningType">
    <xs:sequence>
      <xs:element minOccurs="0" maxOccurs="1" name="oof" type="xs:string" />
    </xs:sequence>
  </xs:complexType>
  <xs:element name="SuccessType" nillable="true" type="SuccessType" />
  <xs:complexType name="SuccessType">
    <xs:sequence>
      <xs:element minOccurs="0" maxOccurs="1" name="Warnings" type="ArrayOfArrayOfWarningType" />
    </xs:sequence>
  </xs:complexType>
  <xs:complexType name="ArrayOfArrayOfWarningType">
    <xs:sequence>
      <xs:element minOccurs="0" maxOccurs="unbounded" name="Warning" type="ArrayOfWarningType" />
    </xs:sequence>
  </xs:complexType>
  <xs:complexType name="ArrayOfWarningType">
    <xs:sequence>
      <xs:element minOccurs="0" maxOccurs="unbounded" name="WarningType" nillable="true" type="WarningType" />
    </xs:sequence>
  </xs:complexType>
</xs:schema>

...它往返.如果我然后在该架构上运行 xsd.exe，我会得到一个包含数组数组的类型.

...and it round-trips. If I then run xsd.exe on that schema, I get a type that wraps an array-of-arrays.

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