Query Exchange server and retrive email address from NT username

• <a href="Query_Exchange_from_NET/EmailFromNT.zip">Download EmailFromNT.zip - 1.3 KB</a> 

Introduction

After searching many diffrent articles I finally was able to do what I wanted. Using the corporate intranet I wanted to be able to email FROM the user that is using clicking the submit button from the webpage without using outlook. Seems simple enough right?

I found the best thing to do is to use Directory Services. So in your ASP .NET application right click the root node in the Solution explorer and add a referance on the .NET tab to:

System.DirectoryServices

and then also include this in the using clause. Once that is done the rest is pretty easy:

//
// I created a simple class to be available anywhere in the application:


using System;

using System.Data;

using System.Configuration;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

using System.DirectoryServices;

using System.Collections;

public class NTtoEmail

{

public NTtoEmail()

{



}

public string GetEmail(string ntname)

{

DirectorySearcher objsearch = new DirectorySearcher(); 

string strrootdse = objsearch.SearchRoot.Path;

DirectoryEntry objdirentry = new DirectoryEntry(strrootdse);

objsearch.Filter = "(& (mailnickname="+ ntname.Trim() + ")(objectClass=user))";

objsearch.SearchScope = System.DirectoryServices.SearchScope.Subtree;

objsearch.PropertiesToLoad.Add("mail");

objsearch.PropertyNamesOnly = true;

SearchResultCollection colresults = objsearch.FindAll();

string arl = "";

foreach (SearchResult objresult in colresults)

{

arl = arl + objresult.GetDirectoryEntry().Properties["mail"].Value + ",";

}

if (arl.Length > 0)

arl = arl.Substring(0, arl.Length - 1);

objsearch.Dispose(); 

return arl;

}

}

This is pretty simple. Now you can simply call this from within the webpage like this:

 
using System;

using System.Data;

using System.Configuration;

using System.Collections;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

 

public partial class test : System.Web.UI.Page

{

protected void Page_Load(object sender, EventArgs e)

{

NTtoEmail mlc = new NTtoEmail();

TextBox1.Text = mlc.GetEmail(Request.ServerVariables["REMOTE_USER"].Substring(3, Request.ServerVariables["REMOTE_USER"].Length - 3)); 

}

}

Points of Interest

The servervariables returns the domain name as well. our corporate domain is 2 letters so this well work but if you have multiple domains I would suggest to use the split function.

Feel free to check out my website as well:

http://www.dbaoasis.com

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