validator

validator.cs

using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml;
using System.Xml.Linq;
using System.Xml.XPath;
using System.Reflection;

namespace xmlreader {
    /// <summary>
    /// GFB validator.
    /// </summary>
    class GFBValidator {
        public const string MSBNamespaceURI = @"http://schemas.microsoft.com/developer/msbuild/2003";
        public string MyXpath { get; private set; }
        XPathDocument document;
        XPathNavigator navigator;
        XmlNamespaceManager manager;
        // XDocument document;

        /// <summary>
        /// Validator.
        /// </summary>
        /// <param name="fileName">Path to xml</param>
        /// <param name="XPathTest">XPath to match</param>
        public GFBValidator(string fileName, string xPathTest) {
            // document = XDocument.Load(fileName);
            document = new XPathDocument(fileName);
            navigator = document.CreateNavigator();
            manager = new XmlNamespaceManager(navigator.NameTable);
            manager.AddNamespace("m", MSBNamespaceURI);
            MyXpath = xPathTest;
        }

        /// <summary>
        /// Validates this instance.
        /// </summary>
        /// <param name="match">Supplied projectname to test against the attributes.</param>
        /// <returns>bool indicating validation success.</returns>
        public bool Validate(string match) {
            string msg;
            bool ret = true;

            if (string.IsNullOrEmpty(match)) {
                msg = string.Format("No project name specified. Must supply a valid non-empty project.");
                ret = false;
            } else {
                IEnumerable<IXPathNavigable> attList = ((IEnumerable)navigator.Select(MyXpath, manager)).Cast<IXPathNavigable>();

                try {
                    msg = string.Format("Project name {0} is valid.", attList.Single(x => x.ToString().Equals(match, StringComparison.InvariantCultureIgnoreCase)));
                    ret = true;
                } catch (System.InvalidOperationException) {
                    msg = string.Format("No element matching {0}.", match);
                    ret = false;
                }
            }

            Console.WriteLine(msg);
            return ret;
        }
    }

    class Program {
        static int Main(string[] args) {
            string FilenameTest = @"/home/smorg/doc/projects/cs/xmldata/GFBList.config.xml";
            string XPathTest = "//m:ItemGroup/m:Name/@Include";
            
            var obj = new GFBValidator(FilenameTest, XPathTest);
            Console.WriteLine(obj.Validate("projname"));
            Console.Read();
            return 0;
        }
    }
}