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    copied!<p>The answer to this is a couple steps:</p> <ol> <li>Add the properties to your Custom Activity .cs</li> <li>Link the properties in your .actions file (so SPD knows how to map to your properties)</li> <li>Use the properties in your code</li> </ol> <p><strong>STEP 1</strong>: Here is the code for the properties (my class is named GetEmails which you will need to rename to be your class):</p> <pre><code>public static DependencyProperty __ContextProperty = System.Workflow.ComponentModel.DependencyProperty.Register("__Context", typeof(WorkflowContext), typeof(GetEmails)); [Description("The site context")] [Category("User")] [Browsable(true)] [DesignerSerializationVisibility(DesignerSerializationVisibility.Visible)] public WorkflowContext __Context { get { return ((WorkflowContext)(base.GetValue(GetEmails.__ContextProperty))); } set { base.SetValue(GetEmails.__ContextProperty, value); } } public static DependencyProperty __ListIdProperty = System.Workflow.ComponentModel.DependencyProperty.Register("__ListId", typeof(string), typeof(GetEmails)); [ValidationOption(ValidationOption.Required)] public string __ListId { get { return ((string)(base.GetValue(GetEmails.__ListIdProperty))); } set { base.SetValue(GetEmails.__ListIdProperty, value); } } public static DependencyProperty __ListItemProperty = System.Workflow.ComponentModel.DependencyProperty.Register("__ListItem", typeof(int), typeof(GetEmails)); [ValidationOption(ValidationOption.Required)] public int __ListItem { get { return ((int)(base.GetValue(GetEmails.__ListItemProperty))); } set { base.SetValue(GetEmails.__ListItemProperty, value); } } public static DependencyProperty __ActivationPropertiesProperty = DependencyProperty.Register("__ActivationProperties", typeof(Microsoft.SharePoint.Workflow.SPWorkflowActivationProperties), typeof(GetEmails)); [ValidationOption(ValidationOption.Required)] public Microsoft.SharePoint.Workflow.SPWorkflowActivationProperties __ActivationProperties { get { return (Microsoft.SharePoint.Workflow.SPWorkflowActivationProperties)base.GetValue(GetEmails.__ActivationPropertiesProperty); } set { base.SetValue(GetEmails.__ActivationPropertiesProperty, value); } } </code></pre> <p><strong>STEP 2</strong>: Then in your .actions file add to your block the mappings for those properties (note the entries for __ListID, __ListItem, __Context, and __ActivationProperties):</p> <pre><code>&lt;Action Name="[DESCRIPTION OF YOUR ACTION]" ClassName="[Your.Namespace.Goes.Here].GetEmails" Assembly="[yourDLLName], Version=1.0.0.0, Culture=neutral, PublicKeyToken=0bfc6fa4c4aa913b" AppliesTo="all" Category="[Your Category Goes Here]"&gt; &lt;RuleDesigner Sentence="[blah blah blah]"&gt; &lt;FieldBind Field="PeopleFieldName" Text="people field" Id="1"/&gt; &lt;FieldBind Field="Output" Text="emailAddress" Id="2" DesignerType="parameterNames" /&gt; &lt;/RuleDesigner&gt; &lt;Parameters&gt; &lt;Parameter Name="__Context" Type="Microsoft.SharePoint.WorkflowActions.WorkflowContext" Direction="In" /&gt; &lt;Parameter Name="__ListId" Type="System.String, mscorlib" Direction="In" /&gt; &lt;Parameter Name="__ListItem" Type="System.Int32, mscorlib" Direction="In" /&gt; &lt;Parameter Name="PeopleFieldName" Type="System.String, mscorlib" Direction="In" /&gt; &lt;Parameter Name="Output" Type="System.String, mscorlib" Direction="Out" /&gt; &lt;Parameter Name="__ActivationProperties" Type="Microsoft.SharePoint.Workflow.SPWorkflowActivationProperties, Microsoft.SharePoint" Direction="Out" /&gt; &lt;/Parameters&gt; &lt;/Action&gt; </code></pre> <p><strong>STEP 3</strong>: Here is an example execute function:</p> <pre><code>protected override ActivityExecutionStatus Execute(ActivityExecutionContext provider) { Output = string.Empty; try { SPWeb web = __Context.Web; // get all of the information we currently have about the item // that this workflow is running on Guid listGuid = new Guid(__ListId); SPList myList = web.Lists[listGuid]; SPListItem myItem = myList.GetItemById(__ListItem); //... } catch (Exception e) { //... } return ActivityExecutionStatus.Closed; } </code></pre>
 

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