Interop with 3.5 Rule Set

Artigo
01/20/2012

This topic applies to Windows Workflow Foundation 4 (WF4).

This sample demonstrates the use of the Interop activity to integrate with a custom activity in .NET Framework 3.5 using Policy and rules. It passes data to the custom activity by binding .NET Framework version 4 variables to the dependency properties exposed by the custom activity.

Requirements

Visual Studio 2010
.NET Framework version 4
.NET Framework version 3.5

Demonstrates

Interop activity, Policy activity in .NET Framework 3.5 with dependency properties

Discussion

The sample demonstrates one of the integration scenarios for integrating with a .NET Framework 3.5 activity. This sample includes a .NET Framework 3.5 custom activity that invokes a Policy activity.

TravelRuleLibrary

Opening TravelRuleSet.cs in the designer shows a custom sequential activity that contains a Policy activity as follows

Interop Activity

Double-click the DiscountPolicy policy activity to examine the rules. The Rules editor appears to show the rules.

Rule Set Editor

Right-click the DiscountPolicy activity and select the View Code option to examine the code-beside C# code that goes with this activity. Observe the dependency property setting for DiscountLevel. This is equivalent to an Argument in .NET Framework 4.

public static DependencyProperty DiscountLevelProperty = DependencyProperty.Register("DiscountLevel", typeof(int), typeof(TravelRuleSet));

[DescriptionAttribute("DiscountLevel")]
[CategoryAttribute("DiscountLevel Category")]
[BrowsableAttribute(true)]
[DesignerSerializationVisibilityAttribute(DesignerSerializationVisibility.Visible)]
public int DiscountLevel
{
   get
   {
return ((int)base.GetValue(TravelRuleSet.DiscountLevelProperty)));
   }
   set
   {
base.SetValue(TravelRuleSet.DiscountLevelProperty, value);
   }
}