private void btnCreateSequentialWorkflow_Click(Object sender, EventArgs e)
{
ConnectionStringSettings persistenceConnectionString = cboPersistenceService.SelectedItem as ConnectionStringSettings;
ConnectionStringSettings trackingConnectionString = cboTrackingService.SelectedItem as ConnectionStringSettings;
if (persistenceConnectionString == null)
{
MessageBox.Show("No connection string selected for persistence service.", "WFTools Samples",
MessageBoxButtons.OK, MessageBoxIcon.Information);
return;
}
String workflowRuntimeKey = String.Format("{0}_{1}_{2}",
persistenceConnectionString.Name,
trackingConnectionString == null ? "None" : trackingConnectionString.Name,
chkUseLocalTransactions.Checked);
SampleWorkFlowRuntime workflowRuntime;
if (!this.loadedWorkflowRuntimes.TryGetValue(workflowRuntimeKey, out workflowRuntime))
{
workflowRuntime = new SampleWorkFlowRuntime(persistenceConnectionString,
trackingConnectionString, chkUseLocalTransactions.Checked);
workflowRuntime.WorkflowTerminated += workflowRuntime_WorkflowTerminated;
workflowRuntime.ServicesExceptionNotHandled += workflowRuntime_ServicesExceptionNotHandled;
this.loadedWorkflowRuntimes.Add(workflowRuntimeKey, workflowRuntime);
}
// create a new sequential workflow
WorkflowInstance workflowInstance = workflowRuntime.CreateSequentialWorkflow();
if (chkModifyWorkflow.Checked)
{
Activity rootActivity = workflowInstance.GetWorkflowDefinition();
WorkflowChanges workflowChanges = new WorkflowChanges(rootActivity);
// modify the workflow
Activity activityToRemove = workflowChanges.TransientWorkflow.GetActivityByName("codeActivity3");
CompositeActivity parentActivity = activityToRemove.Parent;
parentActivity.Activities.Remove(activityToRemove);
CodeActivity codeActivity = new CodeActivity("TestChangeActivity");
codeActivity.ExecuteCode +=
delegate { Trace.WriteLine("Test Change Activity executed..."); };
parentActivity.Activities.Add(codeActivity);
workflowInstance.ApplyWorkflowChanges(workflowChanges);
}
workflowInstance.Start();
ManualWorkflowSchedulerService schedulerService = workflowRuntime.GetService <ManualWorkflowSchedulerService>();
schedulerService.RunWorkflow(workflowInstance.InstanceId);
}
private void miCreateSequentialWorkflow_Click(object sender, EventArgs e)
{
// create a new sequential workflow
WorkflowInstance workflowInstance = SampleWorkflowRuntime.Current.CreateSequentialWorkflow();
if (_options.WorkflowSettings.ModifySequentialWorkflow)
{
Activity rootActivity = workflowInstance.GetWorkflowDefinition();
WorkflowChanges workflowChanges = new WorkflowChanges(rootActivity);
// modify the workflow
Activity activityToRemove = workflowChanges.TransientWorkflow.GetActivityByName("codeActivity3");
CompositeActivity parentActivity = activityToRemove.Parent;
parentActivity.Activities.Remove(activityToRemove);
CodeActivity codeActivity = new CodeActivity("TestChangeActivity");
codeActivity.ExecuteCode +=
delegate { Trace.WriteLine("Test Change Activity executed..."); };
parentActivity.Activities.Add(codeActivity);
workflowInstance.ApplyWorkflowChanges(workflowChanges);
}
workflowInstance.Start();
SampleWorkflowRuntime.Current.RunWorkflow(workflowInstance.InstanceId);
}
/// <summary>
/// Apply the changes
/// </summary>
/// <param name="instance"></param>
/// <param name="wfChanges"></param>
private static void ValidateAndApplyChanges(
WorkflowInstance instance, WorkflowChanges wfChanges)
{
//validate the structural changes before applying them
ValidationErrorCollection errors = wfChanges.Validate();
if (errors.Count == 0)
{
try
{
//apply the changes to the workflow instance
instance.ApplyWorkflowChanges(wfChanges);
}
catch (Exception e)
{
Console.WriteLine("Exception applying changes: {0}",
e.Message);
}
}
else
{
//the proposed changes are not valid
foreach (ValidationError error in errors)
{
Console.WriteLine(error.ToString());
}
}
}
static void OnWorkflowIdle(object sender, WorkflowEventArgs e)
{
if (wasChanged)
{
return;
}
wasChanged = true;
WorkflowInstance workflowInstance = e.WorkflowInstance;
Int32 newAmount = 15000;
Console.WriteLine("Dynamically change approved amount to {0:c}", newAmount);
// Dynamic update of order rule
WorkflowChanges workflowchanges = new WorkflowChanges(workflowInstance.GetWorkflowDefinition());
CompositeActivity transient = workflowchanges.TransientWorkflow;
RuleDefinitions ruleDefinitions = (RuleDefinitions)transient.GetValue(RuleDefinitions.RuleDefinitionsProperty);
RuleConditionCollection conditions = ruleDefinitions.Conditions;
RuleExpressionCondition condition1 = (RuleExpressionCondition)conditions["Check"];
(condition1.Expression as CodeBinaryOperatorExpression).Right = new CodePrimitiveExpression(newAmount);
workflowInstance.ApplyWorkflowChanges(workflowchanges);
}
private void AddOrderOnHoldState()
{
// Get a reference to the WorkflowInstance for the selected workflow
WorkflowInstance instance =
this.runtime.GetWorkflow(this.GetSelectedWorkflowInstanceID());
// Get a reference to the root activity for the workflow
Activity root = instance.GetWorkflowDefinition();
// Create a new instance of the WorkflowChanges class for managing
// the in-memory changes to the workflow
WorkflowChanges changes = new WorkflowChanges(root);
// Create a new State activity to the workflow
StateActivity orderOnHoldState = new StateActivity();
orderOnHoldState.Name = "OrderOnHoldState";
// Add a new EventDriven activity to the State
EventDrivenActivity eventDrivenDelay = new EventDrivenActivity();
eventDrivenDelay.Name = "DelayOrderEvent";
orderOnHoldState.Activities.Add(eventDrivenDelay);
// Add a new Delay, initialized to 5 seconds
DelayActivity delayOrder = new DelayActivity();
delayOrder.Name = "delayOrder";
delayOrder.TimeoutDuration = new TimeSpan(0, 0, 5);
eventDrivenDelay.Activities.Add(delayOrder);
// Add a new SetState to the OrderOpenState
SetStateActivity setStateOrderOpen = new SetStateActivity();
setStateOrderOpen.TargetStateName = "OrderOpenState";
eventDrivenDelay.Activities.Add(setStateOrderOpen);
// Add the OnHoldState to the workflow
changes.TransientWorkflow.Activities.Add(orderOnHoldState);
// Apply the changes to the workflow instance
try
{
instance.ApplyWorkflowChanges(changes);
}
catch (WorkflowValidationFailedException)
{
// New state has already been added
MessageBox.Show("On Hold state has already been added to this workflow.");
}
}
static void OnWorkflowIdled(object sender, WorkflowEventArgs e)
{
WorkflowInstance workflowInstance = e.WorkflowInstance;
Activity wRoot = workflowInstance.GetWorkflowDefinition();
//
// use WorkflowChanges class to author dynamic change
//
WorkflowChanges changes = new WorkflowChanges(wRoot);
Console.WriteLine(" Host is denying all PO requests - Removing POCreated step");
//
// remove POCreated activity
//
changes.TransientWorkflow.Activities.Remove(changes.TransientWorkflow.Activities["POCreated"]);
//
// apply transient changes to instance
//
workflowInstance.ApplyWorkflowChanges(changes);
}
/// <summary>
/// Applies the workflow changes.
/// </summary>
public void ApplyWorkflowChanges()
{
if (this.InnerWorkflowChanges != null)
{
// Load WorkflowInstance
WorkflowInstance instance = GlobalWorkflowRuntime.WorkflowRuntime.GetWorkflow(this.InstanceId);
// ApplyWorkflowChanges to WorkflowInstance
instance.ApplyWorkflowChanges(this.InnerWorkflowChanges);
// ApplyWorkflowChanges to WorkflowInstanceEntity
this.WorkflowEntity[WorkflowInstanceEntity.FieldXaml] = McWorkflowSerializer.GetString(this.InnerWorkflowChanges.TransientWorkflow);
BusinessManager.Update(this.WorkflowEntity);
}
else if (this.WorkflowEntity != null)
{
// ApplyWorkflowChanges to WorkflowInstanceEntity
this.WorkflowEntity[WorkflowInstanceEntity.FieldXaml] = McWorkflowSerializer.GetString(this.TransientWorkflow);
if (this.WorkflowEntity.PrimaryKeyId.HasValue)
{
BusinessManager.Update(this.WorkflowEntity);
}
else
{
this.InstanceId = (Guid)BusinessManager.Create(this.WorkflowEntity);
}
}
else
{
throw new InvalidOperationException("The workflow has already been saved.");
}
Dispose(true);
}