cdetectinternet.cs

来自「一个pocketPC 程序」· CS 代码 · 共 50 行

using System;
using System.Net;

namespace SmartWKN
{
	/// <summary>
	/// Detect an active Internet connection
	/// </summary>
	public class cDetectInternet
	{
		public cDetectInternet()
		{
		}

		private const string URL = "http://www.yahoo.de";

		public static bool DetectInternet()
		{
			HttpWebRequest req = null;
			HttpWebResponse resp = null;
			bool retValue = false;

			try
			{
				req = (HttpWebRequest)HttpWebRequest.Create(URL);
				resp = (HttpWebResponse)req.GetResponse();
				if (resp.StatusCode == HttpStatusCode.OK)
				{
					retValue = true;
				}
				else
				{
					retValue = false;
				}
				req = null;
				resp.Close();
				resp = null;
			}
			catch
			{
				retValue = false;
			}

			return retValue;

		}

	}
}