Workflows with Asp.net Application getting an error.

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WorkflowInstance instance = workflowRuntime.CreateWorkflow(type);

getting an error

Stack trace

[ArgumentException: The input workflow type must be an Activity.
Parameter name: workflowType]
   System.Workflow.Runtime.WorkflowRuntime.CreateWorkflow(Type workflowType) +1327127
   WorkflowTest._Default.WFInvoke_Click(Object sender, EventArgs e) in F:\WCF\WFLibrary\GuessNumberGameInSequence\WorkflowTest\Default.aspx.cs:50
   System.Web.UI.WebControls.Button.OnClick(EventArgs e) +118
   System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +112
   System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +10
   System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +13
   System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +36
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +5563

Posted 18-Jul-12 23:39pm

Nareshnani

Updated 18-Jul-12 23:41pm

Mehdi Gholam

v2

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Sandeep Mewara · Accepted Answer · 2012-07-18T23:47:00

Solution 1

The input workflow type must be an Activity.
'type' used by you to instantiate Workflownstance is not of type 'Activity'.

C#

WorkflowInstance instance = workflowRuntime.CreateWorkflow(OBJECT_HERE_OF_ACTIVITY_TYPE); //

I guess you simply copied code from here: MSDN: WorkflowInstance[^], but you need to first define 'type'. Example here was part of sample present here: MSDN: Cancelling Work sample[^]

Posted 18-Jul-12 23:47pm

Sandeep Mewara

Comments

Nareshnani 19-Jul-12 7:50am

WorkflowRuntime workflowRuntime = Application["WorkflowRuntime"] as WorkflowRuntime;
ManualWorkflowSchedulerService manualScheduler = workflowRuntime.GetService(typeof(ManualWorkflowSchedulerService)) as ManualWorkflowSchedulerService;
Type type = typeof(WF_Library.Activity1);
WorkflowInstance instance = workflowRuntime.CreateWorkflow(typeof(WF_Library.Activity1));
instance.Start();
manualScheduler.RunWorkflow(instance.InstanceId);
-->Still i am getting same error.