public void Add(double x, double y)
{
double result = x + y;
ICalculatorCallback callback = OperationContext.Current.GetCallbackChannel <ICalculatorCallback>();
callback.DisplayResult(result, x, y);
}
private void EnsureWorkflowStarted()
{
if (instance == null)
{
// we need to manage the service's subscription to the dataexchangeservice with the lifetime of the workflow
// Aquire the callback from the current OperationContext
callback = OperationContext.Current.GetCallbackChannel <ICalculatorCallback>();
//grab the version of the incoming message in case we need to create a fault later
version = OperationContext.Current.IncomingMessageVersion;
// retrieve the WorkflowRuntime from our WFServiceHostExtension
WorkflowRuntime workflowRuntime = OperationContext.Current.Host.Extensions.Find <WFServiceHostExtension>().WorkflowRuntime;
// grab a reference to our mathService
ExternalDataExchangeService dataExchangeService = workflowRuntime.GetService <ExternalDataExchangeService>();
mathService = (MathDataExchangeService)dataExchangeService.GetService(typeof(MathDataExchangeService));
// if it is null set it up
if (mathService == null)
{
mathService = new MathDataExchangeService();
dataExchangeService.AddService(mathService);
}
//register with the ResultReceived event
mathService.ResultReceived += HandleResultReceived;
//register to get signaled when the workflow completes
workflowRuntime.WorkflowCompleted += this.OnWorkflowCompleted;
workflowRuntime.WorkflowTerminated += this.OnWorkflowTerminated;
//create and start the Workflow
instance = workflowRuntime.CreateWorkflow(typeof(Workflow1));
instance.Start();
}
}
/// <summary>
/// Performs the calculation by executing the pre-expression and expression.
/// </summary>
/// <param name="source">The source.</param>
/// <param name="filter">The filter used to access the rows on which the calculation will be performed.</param>
/// <param name="fieldName">Field to perform the calculation on.</param>
/// <param name="expression">Expression or value applied to a field in each row of the cursor.</param>
/// <param name="preExpression">
/// A pre-calculation determination of a value or variable that may be used as the expression
/// (or value) of the calculation.
/// </param>
/// <param name="showErrorPrompt">if set to <c>true</c> show a message prompt when an error occurs during calculation.</param>
/// <param name="callback">The call back routine.</param>
/// <returns>
/// Returns a <see cref="IEnvelope" /> representing the features that have been modified by the calculation. This
/// envelope can be used to refresh the display for the calculated area only. If the table used in the calculate is
/// non-spatial, a null is returned.
/// </returns>
public static IEnvelope Calculate(this ITable source, IQueryFilter filter, string fieldName, string expression, string preExpression, bool showErrorPrompt, ICalculatorCallback callback)
{
ICalculator calculator = new CalculatorClass();
calculator.Callback = callback;
calculator.Cursor = source.Search(filter, false);
calculator.Field = fieldName;
calculator.Expression = expression;
calculator.PreExpression = preExpression;
calculator.ShowErrorPrompt = showErrorPrompt;
return(calculator.Calculate());
}
public CalculatorService()
{
// встановлюємо зв'язок для доступу до каналу зворотнього зв'язку
callback = OperationContext.Current.GetCallbackChannel <ICalculatorCallback>();
}
public Service2()
{
call = OperationContext.Current.GetCallbackChannel<ICalculatorCallback>();
}
/// <summary>
/// Performs the calculation by executing the pre-expression and expression.
/// </summary>
/// <param name="source">The source.</param>
/// <param name="filter">The filter used to access the rows on which the calculation will be performed.</param>
/// <param name="fieldName">Field to perform the calculation on.</param>
/// <param name="expression">Expression or value applied to a field in each row of the cursor.</param>
/// <param name="preExpression">
/// A pre-calculation determination of a value or variable that may be used as the expression
/// (or value) of the calculation.
/// </param>
/// <param name="showErrorPrompt">if set to <c>true</c> show a message prompt when an error occurs during calculation.</param>
/// <param name="callback">The call back routine.</param>
/// <returns>
/// Returns a <see cref="IEnvelope" /> representing the features that have been modified by the calculation. This
/// envelope can be used to refresh the display for the calculated area only. If the table used in the calculate is
/// non-spatial, a null is returned.
/// </returns>
public static IEnvelope Calculate(this IFeatureClass source, IQueryFilter filter, string fieldName, string expression, string preExpression, bool showErrorPrompt, ICalculatorCallback callback)
{
return(((ITable)source).Calculate(filter, fieldName, expression, preExpression, showErrorPrompt, callback));
}
public CalculatorService()
{
callback = OperationContext.Current.GetCallbackChannel <ICalculatorCallback>(); //це зробили проксі із служби на клієнт
}
