Hi, I'm using vs2005, .net 2 for a C# windows applicaiton running on Win2K
server. One method of this application, deletes, creates and modify several
Directory Entry. This is running fine on my development PC. I put this on
another server and I would get error: "Only one type of operation can be
performed in a sequence"

Does anyone what could possiblly be causing this error? Thank you.
--

Hi Joe, Both my development PC and the Virtual Machine are running Win2K
Server. The error occur on the VM server when the code runs through this 2
methods. What's confusing for me is that it works for my PC but getting
error on our VM test machine. Thank you.

private bool StartCommit()
{
DataRow[] newRows;
string path, sid, strUnifiedID, ID, globalPath;
DirectoryEntry de = new DirectoryEntry();
SearchResult sr;
int unifiedID = 0, ugid;
bool useUnifiedID = false, success = false, available = false;
DirectoryEntry deUGID = new DirectoryEntry();

if (importUsers)
{
globalPath = CUnityDS.globalUsersPath +
dtGlobal.Rows[0]["curDomain"].ToString();
ID = "UID";
path =
"LDAP://CN=NextUnifiedID,CN=Users,CN=Global,CN=PowerADvantage,CN=Symark,CN=Program Data," + dtGlobal.Rows[0]["curDomain"].ToString();
}
else
{
globalPath = CUnityDS.globalGroupsPath +
dtGlobal.Rows[0]["curDomain"].ToString();
ID = "GID";
path =
"LDAP://CN=NextUnifiedID,CN=Groups,CN=Global,CN=PowerADvantage,CN=Symark,CN=Program Data," + dtGlobal.Rows[0]["curDomain"].ToString();
}

DirectoryEntry deSearchRoot = new DirectoryEntry(globalPath);
DirectorySearcher dsGlobal = new DirectorySearcher(deSearchRoot);
dsGlobal.PropertiesToLoad.Add("meetingID");
dsGlobal.SearchScope = SearchScope.OneLevel;

try
{
//Let's get all the rows that have been updated
if(importUsers)
newRows = tblTarget.Select("Mapped = true", "objectSid",
DataViewRowState.CurrentRows);
else
newRows = tblTargetGroup.Select("Mapped = true",
"objectSid", DataViewRowState.CurrentRows);

if (newRows.Length <= 0)
{
return false;
}

//Proecess each row found to import
for (int index = 0; index < newRows.Length; index++)
{
ugid = Convert.ToInt32(newRows[index][ID].ToString());
//Check if a Global object already exists for this row
and get the Unified ID
sid = newRows[index]["objectSid"].ToString();
dsGlobal.Filter = "cn = " + sid;
sr = dsGlobal.FindOne();
if (sr != null)//Global object already exists
{
de = sr.GetDirectoryEntry();
strUnifiedID =
de.Properties["meetingID"].Value.ToString();
available = CUnityDS.UnifiedIdAvailable(globalPath,
strUnifiedID);
if (!available)
{
strUnifiedID = CUnityDS.GetNextUnifiedID(path,
strUnifiedID);
}
if (strUnifiedID == null)
{
MessageBox.Show("Error obtaining a unified id.",
"PowerADvantage");
return false;
}
unifiedID = Convert.ToInt32(strUnifiedID);

if (unifiedID == ugid)
useUnifiedID = true;
else
useUnifiedID = false;
Commit(newRows[index], useUnifiedID, globalPath,
sid, ugid, true, unifiedID);
}
else//no Global object so use the ugid as the unified ID
but if it is
//already used as a unified id by another object then
use the next
//available unified id
{
de = null;
//No object found Global folder, use the ugid but
check it's not used already
available = CUnityDS.UnifiedIdAvailable(globalPath,
ugid.ToString());

if (available)//OK to use the ugid
{
unifiedID = ugid;
useUnifiedID = true;
}
else//ugid is already used as unified id by other
object. Use the next avaible unified id
{
try
{
deUGID.Path = path;
//string test =
deUGID.Properties["cn"].Value.ToString();
}
catch (COMException cep)
{
MessageBox.Show(cep.Message + " Error Code:
" + cep.ErrorCode.ToString(), "PowerADvantage");
return false;
}
if (deUGID == null ||
deUGID.Properties["meetingID"].Value == System.DBNull.Value)
{
MessageBox.Show("Not able to retrieve the
next available unified ID. Please " +
"exit and call for support.",
"PowerADvantage");
return false;
}
//Verify if the id obtain is not in used. If
already in used then increment and
//test until it is avaiable. Set the next avail
id back to the folder
strUnifiedID =
deUGID.Properties["meetingID"].Value.ToString();
strUnifiedID =
CUnityDS.GetNextUnifiedID(globalPath, strUnifiedID);
if (strUnifiedID == null)
{
MessageBox.Show("Error obtaining a unified
id.", "PowerADvantage");
return false;
}
unifiedID = Convert.ToInt32(strUnifiedID);//use
this avialbe ID
if (unifiedID == ugid)
useUnifiedID = true;

//inc to set next available Unified ID
deUGID.Properties["meetingID"].Clear();
int newUid = unifiedID + 1;
string strNewUID = newUid.ToString();
deUGID.Properties["meetingID"].Add(strNewUID);
deUGID.CommitChanges();
}

success = Commit(newRows[index], useUnifiedID,

You need to provide more detail here. Can you show an example of the code
that produces the error, the exact error stack trace and more information
about the differences between your development machine OS and the deployment
server?

It could be that you have run into an ADSI limitation on Win2K server where
multiple different types of attribute modifications are not allowed, but it
isn't clear if that is the problem. If that is, you need to either write
your code differently or upgrade the server OS to a version of Windows that
supports that ADSI feature (2K3 server).

Joe K.

--
Joe Kaplan-MS MVP Directory Services Programming
Co-author of "The .NET Developer's Guide to Directory Services Programming"
http://www.directoryprogramming.net
--
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Since there is no VS for me to debug on the VM server I put in a bunch of
messages to see where I'm getting this error. It's apparently coming from my
StartCommit() method in the following code when deUGID is doing the "Add"
method. Can you see what could possible cuase this? Again, the same is
running just fine on my development PC.

int newUid = unifiedID + 1;
string strNewUID = newUid.ToString();
deUGID.Properties["meetingID"].Clear();
deUGID.Properties["meetingID"].Add(strNewUID);//This is the line of code
giving error
deUGID.CommitChanges();

--
Thanks.


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