Check the connection to the URL
========================================================================
string InternetUrl = "";
if (CheckConnection.Once("
http://100.100.100.10/cerep2/sscesa20.dll") ==
true)
InternetUrl =
http://GPRS_IP/RepFolder/sscesa20.dll;
else
InternetUrl =
http://ActivSync_IP/RepFolder/sscesa20.dll;
============================================================================
=====
using System;
using System.Net;
namespace Delta_Stocktaking
{
/// <summary>
/// Utility class for checking connection.
/// </summary>
public class CheckConnection
{
/// <summary>
/// Check (HTTP) connection once.
/// </summary>
/// <param name="targetAddress">Target address (URL or IP) to check</param>
/// <returns>Whether connection exist to target address</returns>
public static bool Once(string targetAddress)
{
HttpWebRequest request;
HttpWebResponse response;
bool isConnected = false;
try
{
request = (HttpWebRequest)WebRequest.Create(targetAddress);
response = (HttpWebResponse)request.GetResponse();
request.Abort();
// success?
if(response.StatusCode == HttpStatusCode.OK)
{
isConnected = true;
}
response.GetResponseStream().Close();
}
catch(WebException we)
{
string errMsg = we.Message;
isConnected = false;
}
catch(Exception ex)
{
string errMsg = ex.Message;
isConnected = false;
}
finally
{
request = null;
response = null;
}
return isConnected;
}
/// <summary>
/// Check (HTTP) connection a specified number of times.
/// </summary>
/// <param name="targetAddress">Target address (URL or IP) to check</param>
/// <param name="timesToCheck">Maximum number of times to check</param>
/// <returns>Whether connection exist to target address</returns>
public static bool Multiple(string targetAddress, int timesToCheck)
{
for (int i = 0; i < timesToCheck; i++)
if (Once(targetAddress))
return true;
return false;
}
}
}
