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POHow to assign an argument to the variable in Workflow Foundation 4.0?
 

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  1. POHow to assign an argument to the variable in Workflow Foundation 4.0?
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    <p>This simple code fails with the following error:</p> <p><strong>The following errors were encountered while processing the workflow tree:</strong></p> <p><strong>'ArgumentValue': The argument named 'Parameter' could not be found on the activity owning these private children. ArgumentReference and ArgumentValue should only be used in the body of an Activity definition.</strong></p> <p>I also tried VisualBasivValue("Parameter") instead of ArgumentValue, and the error was:</p> <p><strong>The following errors were encountered while processing the workflow tree:</strong></p> <p><strong>'VisualBasicValue': Compiler error(s) encountered processing expression "Parameter". 'Parameter' is not declared. It may be inaccessible due to its protection level.</strong></p> <p>How to do it properly?</p> <p>I tried to build something similar in Xaml, and it works, here is the code:</p> <pre><code>&lt;Assign sap:VirtualizedContainerService.HintSize="242,58"&gt; &lt;Assign.To&gt; &lt;OutArgument x:TypeArguments="x:String"&gt;[variable]&lt;/OutArgument&gt; &lt;/Assign.To&gt; &lt;Assign.Value&gt; &lt;InArgument x:TypeArguments="x:String"&gt;[Parameter]&lt;/InArgument&gt; &lt;/Assign.Value&gt; &lt;/Assign&gt; </code></pre> <p>Looks like it references the parameter somehow, but how...</p> <p>How can I do it in code? Here is my simple scenario:</p> <pre><code>public class RootActivity : NativeActivity { public InArgument&lt;string&gt; Parameter { get; set; } public Activity Activity { get; set; } public RootActivity() { var variable = new Variable&lt;string&gt;("V1", "This is my variable!"); var activity = new Sequence { Variables = {variable}, Activities = { new Assign&lt;string&gt; { To = new OutArgument&lt;string&gt;(variable), Value = new InArgument&lt;string&gt;( new ArgumentValue&lt;string&gt;("Parameter")); }, } }; this.Activity = activity; } protected override void Execute(NativeActivityContext context) { context.ScheduleActivity(this.Activity); } } </code></pre> <p>Thanks a lot for any help!</p>
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