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Improved IsConnected and IsAvailable as shown in Issue #8.

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Signed-off-by: Michele Cattafesta <michele.cattafesta@mesta-automation.com>
This commit is contained in:
Michele Cattafesta
2015-10-01 22:18:30 +02:00
parent 2c40bc6ab5
commit 92dd158698
1 changed files with 15 additions and 6 deletions
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21
S7.Net/PLC.cs
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@@ -18,6 +18,10 @@ namespace S7.Net
public Int16 Slot { get; set; }
public string Name { get; set; }
public object Tag { get; set; }
/// <summary>
/// Pings the IP address and returns true if the result of the ping is Success.
/// </summary>
public bool IsAvailable
{
get
@@ -27,18 +31,23 @@ namespace S7.Net
return result != null && result.Status == IPStatus.Success;
}
}
/// <summary>
/// Checks if the socket is connected and polls the other peer (the plc) to see if it's connected.
/// This is the variable that you should continously check to see if the communication is working
/// See also: http://stackoverflow.com/questions/2661764/how-to-check-if-a-socket-is-connected-disconnected-in-c
/// </summary>
public bool IsConnected
{
get
{
if (_mSocket != null)
try
{
return _mSocket.Connected;
}
else
{
return false;
if (_mSocket == null)
return false;
return !((_mSocket.Poll(1000, SelectMode.SelectRead) && (_mSocket.Available == 0)) || !_mSocket.Connected);
}
catch { return false; }
}
}
public string LastErrorString { get; private set; }