需要帮助在 C# 中针对 XSD 验证 XML

我正在编写一个需要验证XML文件的WPF应用程序。我有以下类来针对一个或多个 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;
        }
    }
}

上面的代码是开源的，可以在这里找到。现在，它被称为：

var validator = new XSDValidator();
validator.AddSchema(@"C:'code'xml'books.xsd");
foreach (CheckableListItem file in FileFullPathChecklist)
{
    if (file.IsChecked)
    {
        if (validator.IsValid(file.Filename)) 
        {
            ValidatedXMLFiles++;
        }
    }
}

在我对 XSD 验证的测试中，我使用了 4 个 XML 文件：其中一个 books.xml 对应于硬编码的架构books.xsd。其他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显示值 4 而不是 1。

我已经从XSDValidator课上验证了我能想到的尽可能多的东西;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名称时，抛出了一个TargetInvocationException而不是我预期的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。任何人都可以提供任何帮助吗？