questions/51520869/get-value-within-the-cdata-within-tab-delimited-text-file-using-c-sharp

CSharp · Console

/Program.cs

using System;
using System.Collections.Generic;
using System.Text;
using System.Linq;
using System.Xml.Serialization;
using System.Xml;
using System.Xml.Linq;
using System.IO;
using System.Data;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters.Binary;
using System.IO.Compression;

//https://stackoverflow.com/questions/51520869/get-value-within-the-cdata-within-tab-delimited-text-file-using-c-sharp

    public class TestClass
    {
        public static void Test()
        {
     		string cdatastring = "<![CDATA[John Smith]]>";
		    string expected = "John Smith"; 		
			
			TestSimple(cdatastring, expected);
			TestReaders(cdatastring, expected);
        }
		
		static void TestSimple(string cdatastring, string expected)
		{
			var value = XElement.Parse("<a>" + cdatastring + "</a>").Value;
			
			Console.WriteLine(value); // Prints John Smith
			
			Assert.IsTrue(value == expected);
		}
		
		static void TestReaders(string cdatastring, string expected)
		{
			var value = XmlExtensions.ParseFragment(cdatastring).Value;
			
			Console.WriteLine(value); // Prints John Smith
			
			Assert.IsTrue(value == expected);
		}
    }

	public static class XmlExtensions
	{
		public static XElement ParseFragment(string xmlFragment)
		{
			using (var reader = new StringReader("<a>").Concat(new StringReader(xmlFragment)).Concat(new StringReader("</a>")))
			{
				return XElement.Load(reader);
			}
		}
	}

	public static class StringExtensions
	{
		// Taken from https://stackoverflow.com/questions/2925652/how-to-string-multiple-textreaders-together/2925722#2925722
		// by Rex M
		
		public static TextReader Concat(this TextReader first, TextReader second)
		{
			return new ChainedTextReader(first, second);
		}
	
		private class ChainedTextReader : TextReader
		{
			private TextReader first;
			private TextReader second;
			private bool readFirst = true;
	
			public ChainedTextReader(TextReader first, TextReader second)
			{
				this.first = first;
				this.second = second;
			}
	
			public override int Peek()
			{
				if (readFirst)
				{
					return first.Peek();
				}
				else
				{
					return second.Peek();
				}
			}
	
			public override int Read()
			{
				if (readFirst)
				{
					int value = first.Read();
					if (value == -1)
					{
						readFirst = false;
					}
					else
					{
						return value;
					}
				}
				return second.Read();
			}
	
			public override void Close()
			{
				first.Close();
				second.Close();
			}
	
			protected override void Dispose(bool disposing)
			{
				base.Dispose(disposing);
				if (disposing)
				{
					first.Dispose();
					second.Dispose();
				}
			}
		}
	}

    public class AssertionFailedException : System.Exception
    {
        public AssertionFailedException() : base() { }

        public AssertionFailedException(string s) : base(s) { }
    }

    public static class Assert
    {
        public static void IsTrue(bool value)
        {
            IsTrue(value, "failed");
        }

        public static void IsTrue(bool value, string message)
        {
            if (value == false)
                throw new AssertionFailedException(message ?? "failed");
        }
    }
						
	public class Program
	{
		public static void Main()
		{
			Console.WriteLine("Roslyn 2.0 Compiler; Environment version: " + Environment.Version);
			Console.WriteLine();

			try
			{
				TestClass.Test();
			}
			catch (Exception ex)
			{
				Console.WriteLine("Uncaught exception: ");
				Console.WriteLine(ex);
				throw;
			}
		}
	}