[solved] Can't succeed to convert string to float

Console.WriteLine("p.Value={0}, p1.Value={1}, p1.DecimalValue={2:F3}, f={3:F1}",p.Value,p1.Value,p1.DecimalValue,f);

2015-03-03T22:03:58.8034010+01:00       INFO    MySensors       N1S3    Sensor.Temperature      21.5    -
N1S3 in program id 22 property Sensor.Temperature value 21.5
p.Value=21.5, p1.Value=21.5, p1.DecimalValue=0.000, f=0.0

//
//	Envoi d'un SMS via l'API Freemobile quand l'humidité de la pièce atteint un seuil critique
//	
//	cf. http://support.microsoft.com/kb/307023/fr
//  cf. https://msdn.microsoft.com/fr-fr/library/system.net.webrequestmethods.http.get%28v=vs.100%29.aspx
//  cf. https://msdn.microsoft.com/fr-fr/library/hh191443.aspx
//  cf. http://www.developpez.net/forums/d224130/dotnet/langages/csharp/csharp-convertir-string-float/#post5514865

const float maxValue = 655f/10f;		// It's silly having to write that !
const float midValue = 50;
const float minValue = 40;
const string hiMsg = "Humidity alert:\n Hum=";
const string loMsg = "Humidity is low now.";

const string FreeID = "12345678";
const string FreePW = "s3Kr3tAp1c0D3";

const string testNode = "N2S0";
enum HState : byte {None,High,Low};		// 3 states for the alert status

static HState status = HState.None;		// Remember if an alert was sent 
static Int32 count =  0;				//
static DateTime lastSMS = new DateTime(2015, 3, 1, 0, 0, 0);

/* 
  ====================================================================
  This code is running one time when program is enabled
  ====================================================================
*/
public void Setup()
{  
    // Gets a NumberFormatInfo associated with the en-US culture.
	// System.Globalization.NumberFormatInfo nfi = System.Globalization.NumberFormatInfo.InvariantInfo;
	// Console.WriteLine("\t DBG: new separator = {0}",nfi.NumberDecimalSeparator);
	// if (float.TryParse("64.6", System.Globalization.NumberStyles.AllowDecimalPoint, System.Globalization.CultureInfo.InvariantCulture,out fValue))
	//   Console.WriteLine("\t DBG: fValue = {0]",fValue);
	// else
	//   Console.WriteLine("\t DBG: fail to convert Value = 64.6");
	// fValue = Convert.ToSingle(p.Value,nfi);        
	// fValue = float.Parse(p.Value.Replace('.',','));									// exeption: incorrect input string format
	// fValue = Single.Parse(p.Value,new System.Globalization.CultureInfo("en-US"));	// exeption: incorrect input string format
	// fValue = Single.Parse(testFloat,new System.Globalization.CultureInfo("en-US"));	// exeption: incorrect input string format

  EventHelper.ModuleChangedHandler ((o, m, p) =>
  {
    if (m.Domain == "MySensors" && m.Address == testNode && p.Property == "Sensor.Humidity" && p.Value != "NaN")
    {
	  float fValue = StrToFloat(p.Value);        
      Console.WriteLine("\t DBG: Count={0,5}, Status={1}, LastOn={2:u}, fValue={3:F2}",count,status,lastSMS,fValue);
      count ++;

      if (fValue >= maxValue && status != HState.High) {
	    SendSMS(hiMsg+p.Value+'%');
        lastSMS = DateTime.Now;
        status = HState.High;
      } else if (fValue <= minValue && status == HState.High) {
        SendSMS(loMsg);
        lastSMS = DateTime.Now;
        status = HState.Low;
      } else if (fValue > midValue && status == HState.Low)
        status = HState.None;
    }
    return true;
  });
}

/*
  ====================================================================
  This code is running periodicaly when program is enabled. 
  Cron job determine running period.
  ====================================================================

public void Run()
{
}
*/
/*
  ====================================================================
  This function send a SMS using SMSAPI from Free mobile.
  The RapidSSLCABundle.crt certificat (used by Free mobile) must be
  installed first for the https request to complete.
  Mono prior to v3.12 by default didn’t trust any SSL certificates
  And current v3.20 don't fully support framework 4.5, System.Net.Http
  namespace nor asynchronous task can be used.
  Installed version is v3.2.8 (sight)
  ====================================================================
*/
private void SendSMS(String message)
{
// string msgUrl = "http://www.google.com";		// Tested OK
// string msgUrl = "https://www.google.com";	// Should work too
  string msgUrl = "https://smsapi.free-mobile.fr/sendmsg?user="+FreeID+"&pass="+FreePW+"&msg="+message;

  
  Console.WriteLine("Sending SMS :{0}\n -> Status=",message );

  try
  {
    System.Net.WebClient client = new System.Net.WebClient();
    client.UseDefaultCredentials = true;
    //workaround for SSL certificate issue
	System.Net.ServicePointManager.ServerCertificateValidationCallback = 
  	  (sender, certificate, chain, sslPolicyErrors) => { return true; };
    //    System.Net.WebRequest.ServerCertificateValidationCallback = () => true;
	System.Net.WebRequest request = System.Net.WebRequest.Create(msgUrl);
    Console.WriteLine("request created");
//  request.Method = System.Net.WebRequestMethods.Http.Head;
    System.Net.HttpWebResponse response = (System.Net.HttpWebResponse)request.GetResponse();
    Console.WriteLine("got the response: {0}",response.StatusCode);

	if (response.StatusCode == System.Net.HttpStatusCode.OK)
  	{
      // Get the stream associated with the response, "using" equals "try/finally"
      using (System.IO.Stream rxStream = response.GetResponseStream())
      {
        // Pipes the stream to a higher level stream reader with the required encoding format. 
        using (System.IO.StreamReader rdStream = new System.IO.StreamReader(rxStream, Encoding.UTF8))
          Console.WriteLine("Response stream received: {0}",rdStream.ReadToEnd());
      }
      Console.WriteLine("Message Sent");
    }
    else
      Console.WriteLine("An error occured");
    // Close everything.
    response.Close();
  }
  catch(Exception e)
  {
     Console.WriteLine("\nException Caught!");
     Console.WriteLine(e.StackTrace);
  }
//  return 0;
}

/*
  ====================================================================
  This function simulate a Single.Parse with InvariantCulture.
  For French people decimale separator is (,) not (.), but with no reason
  Convert method fails and throw an exception.
  ====================================================================
*/
float StrToFloat(string sVal)
{
  string[] sSingle;
  float Val;
 
  sSingle = sVal.Split(new char[1] {'.'});
  Val = Convert.ToInt32(sSingle[0]) * 10 + Convert.ToInt32(sSingle[1][0]);

  return Val / 10;
}

$ export LANG="en_GB.utf8"