在C＃中验证XML对XSD引用

问题描述

我有一个指定模式位置的XML文件像这样：

I have an XML file with a specified schema location such as this:

xsi:schemaLocation="someurl ..\localSchemaPath.xsd"

我想在C＃中验证。 Visual Studio中，当我打开该文件，对其进行验证的架构，完美列出了错误。但不知何故，我似乎无法在C＃中自动验证它不指定模式来验证，像这样：

I want to validate in C#. Visual Studio, when I open the file, validates it against the schema and lists errors perfectly. Somehow, though, I can't seem to validate it automatically in C# without specifying the schema to validate against like so:

XmlDocument asset = new XmlDocument();

XmlTextReader schemaReader = new XmlTextReader("relativeSchemaPath");
XmlSchema schema = XmlSchema.Read(schemaReader, SchemaValidationHandler);

asset.Schemas.Add(schema);

asset.Load(filename);
asset.Validate(DocumentValidationHandler);

我不应该能够与自动将XML文件中指定的架构验证？我缺少什么？

Shouldn't I be able to validate with the schema specified in the XML file automatically ? What am I missing ?

推荐答案

您需要创建XmlReaderSettings实例，并传递到您的XmlReader当您创建它。然后，你可以订阅的ValidationEventHandler中的设置来接收验证错误。您code最终会看起来像这样：

You need to create an XmlReaderSettings instance and pass that to your XmlReader when you create it. Then you can subscribe to the ValidationEventHandler in the settings to receive validation errors. Your code will end up looking like this:

using System.Xml;
using System.Xml.Schema;
using System.IO;

public class ValidXSD
{
    public static void Main()
    {

        // Set the validation settings.
        XmlReaderSettings settings = new XmlReaderSettings();
        settings.ValidationType = ValidationType.Schema;
        settings.ValidationFlags |= XmlSchemaValidationFlags.ProcessInlineSchema;
        settings.ValidationFlags |= XmlSchemaValidationFlags.ProcessSchemaLocation;
        settings.ValidationFlags |= XmlSchemaValidationFlags.ReportValidationWarnings;
        settings.ValidationEventHandler += new ValidationEventHandler(ValidationCallBack);

        // Create the XmlReader object.
        XmlReader reader = XmlReader.Create("inlineSchema.xml", settings);

        // Parse the file.
        while (reader.Read()) ;

    }
    // Display any warnings or errors.
    private static void ValidationCallBack(object sender, ValidationEventArgs args)
    {
        if (args.Severity == XmlSeverityType.Warning)
            Console.WriteLine("\tWarning: Matching schema not found.  No validation occurred." + args.Message);
        else
            Console.WriteLine("\tValidation error: " + args.Message);

    }
}

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