How to Validate an XML Against a Referenced XSD in C#?

Validate XML with external XSD schema in C#

In C#, validating an XML document against an external XSD schema can usually be accomplished by directly leveraging the information provided in the XML's xsi:schemaLocation attribute. However, in some cases, manual intervention is required to perform verification.

In order to automatically validate XML against a specified schema, you need to create an instance of XmlReaderSettings and pass it to it when creating the XmlReader. By setting ValidationType to Schema, and ValidationFlags to include ProcessInlineSchema, ProcessSchemaLocation, and ReportValidationWarnings, the reader will automatically process and validate the XML against the schema referenced in the xsi:schemaLocation attribute.

Here is a code snippet demonstrating this approach:

<code class="language-csharp">using System.Xml;
using System.Xml.Schema;
using System.IO;

public class ValidXSD
{
    public static void Main()
    {
        // 设置验证设置。
        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);

        // 创建XmlReader对象。
        XmlReader reader = XmlReader.Create("inlineSchema.xml", settings);

        // 解析文件。
        while (reader.Read()) ;
    }

    // 显示任何警告或错误。
    private static void ValidationCallBack(object sender, ValidationEventArgs args)
    {
        if (args.Severity == XmlSeverityType.Warning)
            Console.WriteLine("\t警告：未找到匹配的模式。未进行验证。" + args.Message);
        else
            Console.WriteLine("\t验证错误： " + args.Message);
    }
}</code>

The above is the detailed content of How to Validate an XML Against a Referenced XSD in C#?. For more information, please follow other related articles on the PHP Chinese website!