/// <summary>
/// Posts the ChemStationStatus (serialized in JSON) to a particular Url.
/// </summary>
/// <param name="status"></param>
public void ConsumeChemStationStatus(ChemStationStatus status)
{
var serializer = new JavaScriptSerializer();
serializer.RegisterConverters(new[] { new ChemStationStatusConverter() });
var js = serializer.Serialize(status);
using (WebClient wc = new WebClient())
{
wc.Headers[HttpRequestHeader.ContentType] = "application/x-www-form-urlencoded";
string HtmlResult = wc.UploadString(_postUrl, "json=" + HttpUtility.UrlEncode(js));
}
}
/// <summary>
/// Gets the current status of the ChemStation app via DDE and maps it to our model object.
/// </summary>
/// <returns>The ORMed ChemStation Status.</returns>
public ChemStationStatus GetCurrentStatus()
{
var status = new ChemStationStatus();
status.Time = DateTime.Now;
var appName = string.Empty;
try
{
appName = GetChemStationAppName();
}
catch (ApplicationException e)
{
status.Status = e.Message;
status.MethodName = string.Empty;
status.SequenceName = string.Empty;
return status;
}
using (DdeClient client = new DdeClient(appName, _DDETopicName))
{
client.Connect();
foreach (var variable in _chemStationVariableNameToPropertyMap)
{
var rawVariable = client.Request(variable.Key, 60000);
// Use reflection to map the raw variable just extracted from ChemStation to the model object.
if (variable.Value.PropertyType == typeof(bool))
{
var val = rawVariable[0] == '1' ? true : false;
_chemStationVariableNameToPropertyMap[variable.Key].SetValue(status, val, null);
}
else
{
// String variables tend to come out of ChemStation with a bizarre amount of control characters followed by jibberish at the end.
var val = rawVariable.Remove(rawVariable.IndexOf(rawVariable.Where(c => char.IsControl(c)).First()));
_chemStationVariableNameToPropertyMap[variable.Key].SetValue(status, val, null);
}
}
}
return status;
}
/// <summary>
/// Method to encapsulate all the calls necessary for polling the provider.
/// </summary>
public void GetData()
{
Status = _provider.GetCurrentStatus();
}
