Getting All Users Information from Domain in ASP.NET
Step #1: Disable “Anonymous Access” of Virtual Directory
- Open Internet Information Service (IIS)
- Go to “Properties of your Virtual Directiory”
- Go to “Directory Security” tab
- Click “Edit” button of “Anonymous access and autherntication control”
- Uncheck “Anonymous access”
Step #2: Enabled impersonating in Web.Config
Add the tag below under in Web.config.
<identity impersonate="true"/>
Step #3: Adding “System.Directory.Services” dll as reference
System.Directory.Services
Open ASP.NET Web project. And add this dll to your project.
Step #4: Put the following code in PageLoad
Code for getting all users from domain
try
{
DirectorySearcher searcher=new DirectorySearcher();
string rootDSE=searcher.SearchRoot.Path;
DirectoryEntry entry = new DirectoryEntry(rootDSE); //eg: Default Domain
DirectorySearcher dirSearcher = new DirectorySearcher(entry);
dirSearcher.Filter = "(&(objectClass=user))";
dirSearcher.SearchScope=SearchScope.Subtree;
dirSearcher.Sort.Direction=System.DirectoryServices.SortDirection.Ascending;
dirSearcher.Sort.PropertyName="cn";
ArrayList domainMembers = new ArrayList();
//Finding all users.
foreach(SearchResult result in dirSearcher.FindAll())
{
try
{
string strUserInfo = string.Empty;
DirectoryEntry de=result.GetDirectoryEntry();
if(de.Properties.Contains("sAMAccountName"))
strUserInfo = de.Properties["sAMAccountName"].Value.ToString();
domainMembers.Add(strUserInfo);
}
catch(Exception ex)
{
Console.WriteLine(ex.Message);
}
}
DataGrid1.DataSource = domainMembers;
DataGrid1.DataBind();
}
catch(Exception ex)
{
Console.WriteLine(ex.Message);
}
You might get the following errors.
- An operations error occurred
- The specified domain either does not exist or could not be contacted
If you are getting these errors above, please make sure that you have permission to access your domain.
Download : http://michaelsync.net/demo/GetAllUsersFromDomain.zip
Hope it would help. Let me know if you have any problem with my code. Thanks.

dear
am convert this code to vb.net and always have an error No Children Available when get domain members
and this my code
Try
Dim searcher As New DirectorySearcher()
Dim rootDSE As String = searcher.SearchRoot.Path
Dim entry As New DirectoryEntry(rootDSE)
‘eg: Default Domain
Dim dirSearcher As New DirectorySearcher(entry)
dirSearcher.Filter = “(&(objectClass=user))”
dirSearcher.SearchScope = SearchScope.Subtree
dirSearcher.Sort.Direction = System.DirectoryServices.SortDirection.Ascending
dirSearcher.Sort.PropertyName = “cn”
Dim domainMembers As New ArrayList()
‘Finding all users.
For Each result As SearchResult In dirSearcher.FindAll()
Try
Dim strUserInfo As String = String.Empty
Dim de As DirectoryEntry = result.GetDirectoryEntry()
If de.Properties.Contains(“sAMAccountName”) Then
strUserInfo = de.Properties(“sAMAccountName”).Value.ToString()
End If
domainMembers.Add(strUserInfo)
Catch ex As Exception
Console.WriteLine(ex.Message)
End Try
Next
DataGrid1.DataSource = domainMembers
DataGrid1.DataBind()
Catch ex As Exception
Console.WriteLine(ex.Message)
End Try