How to authenticate Silverlight Application with Active Directory ?

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Hello Everyone,

I am new to Silverlight. I want to implement windows authentication with active directory for silverlight application,

I have not found complete downloadable example. Can you please send me the links, where can i download the example?.

Can you suggest me, how can i achieve this functionality.

Thanks in Advance.

Posted 17-Jul-14 0:43am

Venkata Ghanitala

Updated 21-Jul-14 3:25am

v2

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2 solutions

Solution 1

There is only one answer to your question... How to: Use Windows Authentication to Secure a Service for Silverlight Applications[^]

We cannot do the task for you, but reading the article you will find the path.

Posted 21-Jul-14 3:34am

Christian Amado

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Venkata Ghanitala · Accepted Answer · 2014-07-21T23:02:00

Hello Christian,

Thank you very much for your reply.

I've solved the issue myself.

I am posting the code below, which may help others:

Step 1:
Create new project and Create New Webservice.
Step 2:
Write the following method:

C#

[WebMethod(Description = "Validate a username and password against Active Directory")]
       public bool Authentication(string domain, string username, string password)
       {
           var val = true;
           try
           {
               DirectoryEntry entry = new DirectoryEntry("LDAP://" + domain, username, password);
               DirectorySearcher search = new DirectorySearcher(entry);

               search.Filter = "(SAMAccountName=" + username + ")";
               var uname = search.PropertiesToLoad.Add("cn");

               SearchResult result = search.FindOne();
               if (result == null)
               {
                   val = false;
               }
           }
           catch
           {
               val = false;
           }
           return val;
       }

Step 3:
Consume this web service in your project.

C#

private void Register_Click(object sender, RoutedEventArgs e)
        {
            try
            {
                //User Name can not be blank
                if (txtUsername.Text.Trim() == "")
                {
                    lblStatus.Text = "Please Enter Username";
                }
                
                //Password can not be blank
                else if (txtPassword.Password == "")
                {
                    lblStatus.Text = "Please Enter Password";
                }

                else
                {
                    //Creating object for "your created web service name (I am taking my web service as Domain_Auth" web service for Authentication
// I am taking WS as proxy name here and 


                    WS.Domain_AuthSoapClient client = new WS.Domain_AuthSoapClient();
                    client.AuthenticationCompleted += new EventHandler<authenticationcompletedeventargs>(Client_AuthenticationCompleted);
                    client.AuthenticationAsync(" your domain name", txtUsername.Text, txtPassword.Password);
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }

        //Event Handler for Authentication Method
        void Client_AuthenticationCompleted(object sender, AuthenticationCompletedEventArgs e)
        {

            if (e.Error != null)
            {
                lblStatus.Text = "Sorry, an error occured. " + e.Error.Message;
            }

            if (e.Result == true)
            {
                //Do something
            }
            else
            {
                //Do something
            }
        }


</authenticationcompletedeventargs>

Thank you very much.