used windows user logged function for search in active directory !!

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Goodmorning,

with this code source i find the user that i will to have the information from the active directory by the name that i insert in the textbox(in this case txtusername).
i would like to not insert the name manually, but I would like to be taken automatically by the function that returns the name of the user logged into windows.

how can I do? someone could help me please? You can modify the source code please?
this is the code source:

C#

string connection =          ConfigurationManager.ConnectionStrings["ADConnection"].ToString();
            DirectorySearcher dssearch = new DirectorySearcher(connection);
            dssearch.Filter = "(sAMAccountName=" + txtusername.Text + ")";     
            SearchResult sresult = dssearch.FindOne();
            DirectoryEntry dsresult = sresult.GetDirectoryEntry();


            lblmittente_nome.Text = dsresult.Properties["givenName"][0].ToString();
            lblmittente_cognome.Text = dsresult.Properties["sn"][0].ToString();
            lblmail.Text = dsresult.Properties["mail"][0].ToString();
            lbldata.Text = DateTime.Now.ToString("dd MMMM yyyy");
            lblfirma_nome.Text = dsresult.Properties["givenName"][0].ToString();
            lblfirma_cognome.Text = dsresult.Properties["sn"][0].ToString();
            lblfunzione.Text = dsresult.Properties["department"][0].ToString();

thanks

Posted 6-Aug-12 2:39am

Member 9299744

Updated 6-Aug-12 9:13am

Sandeep Mewara

v2

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Prabhakaran Soundarapandian · Answer 1 · 2012-08-06T02:52:00

Solution 1

Use

C#

Environment.UserName

to get the logged username.

Posted 6-Aug-12 2:52am

Prabhakaran Soundarapandian

Philip Stuyck · Answer 2 · 2012-08-06T03:03:00

I am using following code :

C#

public class UserIdentity : WindowsIdentity
    {
        private int userId = -1;
        internal FrakoEntitiesConnection context;

        private UserIdentity(WindowsIdentity windowsIdentity)
            : base(windowsIdentity.Token)
        {
        }

        public new static UserIdentity GetCurrent()
        {
            WindowsIdentity identity = WindowsIdentity.GetCurrent();
            return new UserIdentity(identity);
        }

        public string UserName
        {
            get
            {
                string result = this.Name;
                if (result.LastIndexOf('\\') == -1) return result;
                else return result.Remove(0, result.LastIndexOf('\\') + 1);
            }
        }

        public int UserId
        {
            get
            {
                if (userId != -1) return userId;
                return 0;
            }
        }
    }

It's part of an authentication/security system i use.