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This article mainly introduces how to use roles in Workflow workflow, the article is very detailed, has a certain reference value, interested friends must read it!

There are two ways available in WF (Workflow): ActiveDirectoryRole (through active Directory users) and WebWorkflowRole (ASP.NET Role). The following examples are given:

1. We use the HandleExternalEventActivity activity to provide the book retrieval function, which triggers the retrieval event when someone retrieves it, and only members can use this function. First, define the event parameters:

Using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Workflow.Activities;namespace CaryWFRole {[Serializable] public class BookEventArgs: ExternalDataEventArgs {public string ID {get; set;} public string Name {get; set;} public string Author {get; set } public BookEventArgs (): base (Guid.NewGuid ()) {} public BookEventArgs (Guid instanceID, string id, string name, string author): base (instanceID) {this.ID = id; this.Name = name; this.Author = author;}}

two。 The event interface is as follows:

Using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Workflow.Activities;namespace CaryWFRole {[ExternalDataExchangeAttribute ()] public interface ISearchBookService {event EventHandlerSearchBook;}}

3. Implement the interface with the following code:

Using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Security.Principal;namespace CaryWFRole {public class SearchBookService:ISearchBookService {public event EventHandlerSearchBook; public void OnSearchRequest (Guid instanceId, string id,string name,string author, IIdentity identity) {BookEventArgs args = new BookEventArgs (instanceId, id, name, author); String securityIdentifier = null; WindowsIdentity windowsIdentity = identity as WindowsIdentity If (windowsIdentity! = null & & windowsIdentity.User! = null) securityIdentifier = windowsIdentity.User.Translate (typeof (NTAccount)) .ToString (); else if (identity! = null) securityIdentifier = identity.Name; args.Identity = securityIdentifier; Console.WriteLine ("return book by: {0}", identity.Name) If (SearchBook! = null) SearchBook (null, args);}

4. The workflow is designed as follows:

Only users of this role collection have permissions by setting the Roles property of the retrieve event (HandleExternalEventActivity) activity. In the workflow, we only allow members to do it.

Search, the code is as follows:

Using System;using System.ComponentModel;using System.ComponentModel.Design;using System.Collections;using System.Drawing;using System.Linq;using System.Workflow.ComponentModel.Compiler;using System.Workflow.ComponentModel.Serialization;using System.Workflow.ComponentModel;using System.Workflow.ComponentModel.Design;using System.Workflow.Runtime;using System.Workflow.Activities;using System.Workflow.Activities.Rules;namespace CaryWFRole {public sealed partial class BookWorkflow: SequentialWorkflowActivity {public BookWorkflow () {InitializeComponent () } private WorkflowRoleCollection sAllowRoles = new WorkflowRoleCollection (); public WorkflowRoleCollection AllowRoles {get {return sAllowRoles;}} private void codeActivity1_ExecuteCode (object sender, EventArgs e) {WebWorkflowRole role = new WebWorkflowRole ("member"); AllowRoles.Add (role) } private void handleExternalEventActivity1_Invoked (object sender, ExternalDataEventArgs e) {Console.WriteLine (query successful);}

5. Use the following function to create roles and users, with the following code:

Static void CreateRoles () {if (! System.Web.Security.Roles.RoleExists) {System.Web.Security.Roles.CreateRole (member); string [] users = {"Zhang San", "Li Si", "Wang Wu"}; string [] ClerkRole = {"member"}; System.Web.Security.Roles.AddUsersToRoles (users, ClerkRole);}}

6. Assuming that it is retrieved as Zhang San, the function that triggers the event is as follows:

Static void SendSearchRequest () {try {string id = "001"; string name = "C # Advanced programming"; string author = "so and so"; GenericIdentity genIdentity = new GenericIdentity ("Zhang San"); sBook.OnSearchRequest (workflowInstanceId, id, name, author, genIdentity) } catch (Exception e) {Console.WriteLine ("Exception message: {0}", e.ToString ());}}

7. The host program is as follows:

Using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading;using System.Workflow.Runtime;using System.Workflow.Runtime.Hosting;using System.Security.Principal;using System.Workflow.Activities;namespace CaryWFRole {class Program {static SearchBookService sBook; static Guid workflowInstanceId; static AutoResetEvent waitHandle = new AutoResetEvent (false); static void Main () {CreateRoles () Using (WorkflowRuntime workflowRuntime = new WorkflowRuntime ()) {workflowRuntime.StartRuntime (); Type type = typeof (BookWorkflow); ExternalDataExchangeService dataService = new ExternalDataExchangeService (); workflowRuntime.AddService (dataService); sBook = new SearchBookService (); dataService.AddService (sBook); workflowRuntime.WorkflowCompleted + = OnWorkflowCompleted WorkflowRuntime.WorkflowTerminated + = OnWorkflowTerminated; WorkflowInstance instance = workflowRuntime.CreateWorkflow (type); workflowInstanceId = instance.InstanceId; instance.Start (); SendSearchRequest (); waitHandle.WaitOne (); workflowRuntime.StopRuntime () }} static void OnWorkflowCompleted (object sender, WorkflowCompletedEventArgs e) {waitHandle.Set ();} static void OnWorkflowTerminated (object sender, WorkflowTerminatedEventArgs e) {Console.WriteLine (e.Exception.Message); waitHandle.Set ();}

8. We will configure the aspnetdb database with the following app.config:

These are all the contents of the article "how to use roles in Workflow Workflow". Thank you for reading! Hope to share the content to help you, more related knowledge, welcome to follow the industry information channel!

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