How to Invoke a Workflow using Invoke Code activity

Help
1

Team,

Please help to know how can i invoke a workflow using code?

   Dim argInvokeFile As Uipath.Core.Activities.InvokeWorkflowFile = New Uipath.Core.Activities.InvokeWorkflowFile

    Dim activity As System.Activities.WorkflowInvoker 
    Try
    argInvokeFile .WorkflowFileName ="Search.xaml"
    activity = New WorkflowInvoker(argInvokeFile ) 
    activity.Invoke()
     
    Catch ex As Exception
     throw
    Finally
       argOpenBrowser1 = Nothing
       activity = Nothing
    End Try

Kindly help to know how i pass arguments within the code as well, Thanks for your support.

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2

Why are you trying to reinvent something that already exists?

RD

3

In the existing method do we have control over the object? and
one more query do the object get destroyed once the execution is over?

The reason I’m asking is if i debug a project with 20 odd xaml uipath stops responding with a msg box “workflow designer” and
error msg “MemoryOut exception” I don’t know the exact error message but i get something like this.

I have to close the application and open again.
pls help to know to why i get this message.

Thanks

4

Hi @Ifham21,

Did you ever find a way to invoke a workflow within an invoke code block? I need to do something similar. I need to run a workflow impersonating another user.

Thanks!

Troy

5

Hello, I tried and worked,

'Simple Invoke Workflow, with out any Parameters
System.Activities.WorkflowInvoker.Invoke(System.Activities.XamlIntegration.ActivityXamlServices.Load(“Test2.xaml”))

System.Windows.MessageBox.Show(“In invoker Workflow”)

''Invoke Workflow, with Input, Output, InOut Parameters
’ Setting Dictionary and store Input, InOut Parameters
Dim paramDictionary As IDictionary(Of String, Object) = New Dictionary(Of String, Object)()
paramDictionary.Add(“in_Num1”, 10)
paramDictionary.Add(“in_Num2”, 20)
paramDictionary.Add(“inout_Message”, “Hi”) 'Setting InOut parameter in Invoker Workflow
'Setting Dictionary to store Out, InOut Parameters
Dim resultDictionary As IDictionary(Of String, Object) = New Dictionary(Of String, Object)()
'Invoking the Workflow
resultDictionary= System.Activities.WorkflowInvoker.Invoke(System.Activities.XamlIntegration.ActivityXamlServices.Load(“Test2.xaml”), paramDictionary)
System.Windows.MessageBox.Show(“Invoker Workflow prints Out Parameter:” + Convert.ToString(resultDictionary(“out_Result”))) 'Printing Out Parameter
System.Windows.MessageBox.Show(“Invoker Workflow prints InOut Parameter:” + Convert.ToString(resultDictionary(“inout_Message”))) 'Printing InOut Parameter

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6

Logging doesnt seem to be working with this method. An invocation is thrown if the target workflow is using log message in the workflow file.

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