C# 需要帮助根据C中的XSD验证XML吗#

C# 需要帮助根据C中的XSD验证XML吗#,c#,xml,xsd,C#,Xml,Xsd,我正在编写一个WPF应用程序,它需要验证XML文件。我使用以下类根据一个或多个XSD文件验证XML: public class XSDValidator { public List<XmlSchema> Schemas { get; set; } public List<String> Errors { get; set; } public List<String> Warnings { get; set; } public

我正在编写一个WPF应用程序,它需要验证XML文件。我使用以下类根据一个或多个XSD文件验证XML:

public class XSDValidator
{
    public List<XmlSchema> Schemas { get; set; }
    public List<String> Errors { get; set; }
    public List<String> Warnings { get; set; }

    public XSDValidator()
    {
        Schemas = new List<XmlSchema>();
    }

    /// <summary>
    /// Add a schema to be used during the validation of the XML document
    /// </summary>
    /// <param name="schemaFileLocation">The file path for the XSD schema file to be added for validation</param>
    /// <returns>True if the schema file was successfully loaded, else false (if false, view Errors/Warnings for reason why)</returns>
    public bool AddSchema(string schemaFileLocation)
    {
        // Reset the Error/Warning collections
        Errors = new List<string>();
        Warnings = new List<string>();

        XmlSchema schema;

        if (!File.Exists(schemaFileLocation))
        {
            throw new FileNotFoundException("The specified XML file does not exist", schemaFileLocation);
        }

        using (var fs = new FileStream(schemaFileLocation, FileMode.Open))
        {
            schema = XmlSchema.Read(fs, ValidationEventHandler);
        }

        var isValid = !Errors.Any() && !Warnings.Any();

        if (isValid)
        {
            Schemas.Add(schema);
        }

        return isValid;
    }

    /// <summary>
    /// Perform the XSD validation against the specified XML document
    /// </summary>
    /// <param name="xmlLocation">The full file path of the file to be validated</param>
    /// <returns>True if the XML file conforms to the schemas, else false</returns>
    public bool IsValid(string xmlLocation)
    {
        if (!File.Exists(xmlLocation))
        {
            throw new FileNotFoundException("The specified XML file does not exist", xmlLocation);
        }

        using (var xmlStream = new FileStream(xmlLocation, FileMode.Open))
        {
            return IsValid(xmlStream);
        }
    }

    /// <summary>
    /// Perform the XSD validation against the supplied XML stream
    /// </summary>
    /// <param name="xmlStream">The XML stream to be validated</param>
    /// <returns>True is the XML stream conforms to the schemas, else false</returns>
    private bool IsValid(Stream xmlStream)
    {
        // Reset the Error/Warning collections
        Errors = new List<string>();
        Warnings = new List<string>();

        var settings = new XmlReaderSettings
        {
            ValidationType = ValidationType.Schema
        };
        settings.ValidationEventHandler += ValidationEventHandler;

        foreach (var xmlSchema in Schemas)
        {
            settings.Schemas.Add(xmlSchema);
        }

        var xmlFile = XmlReader.Create(xmlStream, settings);

        while (xmlFile.Read()) { }

        return !Errors.Any() && !Warnings.Any();
    }

    private void ValidationEventHandler(object sender, ValidationEventArgs e)
    {
        switch (e.Severity)
        {
            case XmlSeverityType.Error:
                Errors.Add(e.Message);
                break;
            case XmlSeverityType.Warning:
                Warnings.Add(e.Message);
                break;
        }
    }
}
在测试XSD验证时,我使用了4个XML文件:其中一个文件
books.XML
,对应于硬编码的模式
books.XSD
。另外三个是我从其他来源提取的随机XML文件,我已经验证了它们对
books.xsd
无效。但是,在运行代码时,
ValidatedXMLFiles
显示的值是4而不是1


我已经从
XSDValidator
类中验证了我所能想到的一切;我尝试手动将随机字符串添加到
Errors
,在这种情况下,
IsValid
返回false。我认为有趣的一件事是,当我尝试将架构文件名更改为不存在的内容时,抛出了一个
targetingException
,而不是我所期望的
FileNotFoundException
。我不知道这是否意味着什么,但这是我见过的唯一奇怪的行为。有人能提供帮助吗?

您假设验证引擎将自动知道如何使用books.xsd模式来验证所有xml文件

这是不对的。xml需要告诉验证器它应该根据哪个XSD进行验证

要表明这一点,请在xml文档中设置xmlns属性

例如:

<MyXml xmlns="http://MySchemaNamespace">
    ...
</MyXml>

...
以及模式:

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" 
           targetNamespace="http://MySchemaNamespace" 
           xmlns="http://MySchemaNamespace" 
           elementFormDefault="qualified">
    ...
</xs:schema>

...

否则,XML“有效”的唯一标准是它的格式良好

嗨,琼斯,我很有兴趣调查这件事。是否有可能获得文件,以便我可以尝试在我的计算机上复制它。我显然希望确保我的代码正常工作。
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" 
           targetNamespace="http://MySchemaNamespace" 
           xmlns="http://MySchemaNamespace" 
           elementFormDefault="qualified">
    ...
</xs:schema>