My Question is simple i think:
What is the difference between writing :
MainFrame MF = new MainFrame();
and
new MainFrame();
Is this something like more pro? I mean for the reason why i do not need to use the MainFrame object .... only to create it for getting into that class??
Iam confused ...
I hava a database , and some frames that i want to show on screen. Something Like a login button ... and i show a trick of this way for creating an new object of the class..
If I understood you question correctly...
When you do assign the 'new MainFrame()' to he object MF probably you open a connection to you MainFrame. This will save resources because you keep one connection open instead of one per call.
If you just want to call one function and you will never call it again you can do it directly like:
(new MainFrame()).getData()
But this code does exactly the same as:
MainFrame MF = new MainFrame();
MF.getData();
Related
I'm trying to create a new User in Active Directory from a VB.NET application. Most fields will be identical to an already existing "template" user, except things like Name, SurName, Email, SamAccountName, etc.
So I want to copy or clone this template User, assign the few fields with a new/different value and then save this new user in Active Directory. I'd like to avoid having to manually assign who-knows how many properties from my template to the new User and maybe forget something along the way..
Is there not a way to do that? I found something about using DirectoryEntry.CopyTo(), but I simply get a "Not implemented" error, and anyway I doubt this is the right direction (Unsure how to use this class together with a UserPrincipal object)
Should I be using a different class than System.DirectoryServices.AccountManagement.UserPrincipal to save my new user in the AD? Do I have the wrong approach?
Any help will be appreciated :)
If you look at the source code for DirectoryEntry.CopyTo, it calls:
newParent.ContainerObject.CopyHere(Path, newName)
And ContainerObject is of the type IADsContainer. If you look at the documentation for IADsContainer.CopyHere, it says (under Remarks):
The providers supplied with ADSI return the E_NOTIMPL error message.
ADSI is "Active Directory Service Interfaces". So the short answer is that it just won't work with AD objects.
There is no way to do what you want. You will have to manually assign each attribute you want to copy.
Is it possible to add to a CustomMboSet in Maximo using scripting? I am writing a custom application using a custom object called TIMESHEET. As part of the application I am writing a (Jython) script that needs to dynamically build up an MboSet (a set of TIMESHEETs). The code retrieves an existing CustomMboSet and attempts to add elements to it. It works when using an out of box MboSet, but when I try to run the same code on a custom MboSet it does not seem to work. No error is thrown, but code below the offending line is not run.
In other words, this works (LABTRANS is an out of box MBO):
myMboSet = mbo.getMboSet("LABTRANS")
newMbo = myMboSet.add()
# Set attributes on newMbo, everything is happy
But this does not (TIMESHEET is a custom MBO):
myMboSet = mbo.getMboSet("TIMESHEET")
newMbo = myMboSet.add()
# Code does not execute after the above line
Anyone have any insight as to why I am seeing this behavior? Does the Maximo scripting framework simply not support the dynamic building up of CustomMboSets? Any help is appreciated. Thanks.
You need to make sure that the relationship exists between the Current MBO and the Custom MBO in the database configuration otherwise it will not work.
Alternatively you can use the following code to create an new mboSet on the fly:
timeSheetMboSet = mxServer.getMboSet("TIMESHEET", userInfo)
mbo.getMboSet(RELATIONSHIPNAME).
LABTRANS and TIMESHEET must be the relationship names to the object in auto script.
If you want to get/add records in any object, use
mxServer.getMboSet(OBJECTNAME, userInfo)
A bit more explanation. You can create your own custom relationship from within your automation script. The trick is to make sure it's not already existing. That's why I use a dollar sign for mine.
variable = mbo.getMboSet(tempRelationshipName,Object,where clause)
previousPhaseSet = mbo.getMboSet("$wophasetranstemp1", "exitdate is null")
I am currently developing an application in which i experience the exception "A cycle was detected in the set of changes" when calling DataContext.SubmitChanges(). I know why this exception is thrown but i have not been able to find a fix for my situation. Let me explain the situation. I have a database with a table as shown below which i access with LINQ to SQL so it gets mapped to classes in vb.net.
Device
-------
ID
DefaultGatewayID
The DefaultGatewayID is a Device an can even be the same object or another Device. The user uses a GUI with a DataGrid to alter and add new records. The updating records is no problem. The ID already exists and the DefaultGatewayObject is attached to the record (the ID is stored in database).
However when i try to add a new record and set the DefaultGatewayObject in the same transaction i get the 'Cycle detected in set of changes'-exception. I suspect this is caused by LINQ to SQL because it does not know which record to add first, although it is the same item in this case.
I do not have the option to break the insertion into two parts, one for the Device and then adding the DefaultGateway because my submit button is bound to a XAML Command which executes the SubmitChanges.
Ideally i would have some option to specify which object is to be created first, or something like that. I think it's an option to remove the connection to itself and just set the ID in this field, but i'd rather find a fix within LINQ to SQL.
I hope SO has an answer to this. I could only find this related post "Cycle detected while adding Circularly linked list"
You can break the insertion into two parts ans still have one transaction if you wrap your code in a TransactionScope.
Using trans As New TransactionScope()
'Code that generates a new ID in the database
dc.SubmitChanges()
'Code that uses the new ID value.
dc.SubmitChanges()
trans.Complete()
End Using
This is the only way to avoid the exception. If this is impossible because of architectural decisions ("my submit button is bound to a XAML Command") you need to change the architecture. I think a UI command should never be so close to the data access layer anyway. You better call a service method from XAML.
I have problems and questions about this scheduler. I already tried to build and almost finished it. Although, I receive some errors...
What I do?
I create custom lightbox
mapping all the data in to table dbo.bEvent
I used custom eventbox like this : Scheduler.Templates.event_text = "({position_desc})" + " " + "{newrate}"
position_desc is actually from other table 'dbo.zone'
I create Views in SQL Server to retrieve data from 'newrate'. 'newrate' actually is a new attribute after I do some query to change rate "1000 to 1k" which is new rate save '1k'.
the views that I create by joining table "dbo.zone and dbo.bEvent"
Problem is?
when I save a new data or insert or update new data. my event box just give me '(Undefine)undefine'
all the data that i put in lightbox is save in dbo.bEvent
after I resfresh the page using f5 or navigate to next page or previous page then the data is updated.
Here i attach some screenshot. Thanks in advance
http://s1319.photobucket.com/user/matpyam/library/?sort=3&page=1
If you save the changes as described here http://scheduler-net.com/docs/lightbox.html#define_crud_logic ,
note that the method uses SchedulerFormResponseScript class to render the response.
Constructor takes instance of the event class to be returned to the client. Values of that event will be applied to the related event on the client-side
return (new SchedulerFormResponseScript(action, changedEvent));
make sure object that you send (changedEvent) has all data properties initialized. Basically the event should have the same data as when it is loaded from the Data action.
Alternative solution, which may be more straightforward, would be reload calendar data with the client-side api after saving event:
scheduler.clearAll();
scheduler.load("dataUrl", "json");
http://docs.dhtmlx.com/scheduler/api__scheduler_clearall.html
http://docs.dhtmlx.com/scheduler/api__scheduler_load.html
I have some code in my ApplicationEvent.vb to handle command line params and then run some procedures based on whatever param was input at cmd.
The problem is that I need to execute a procedure that has a dataset table adapter in it.
Obviously as I want it to run in batch mode I can't have a table adapter as they are GUI based (or at least I think they are) so I am getting this error:
'V_SyncStatusTableAdapter' is not a member of 'AppName.My.MyApplication'
For this code:
If Me.V_SyncStatusTableAdapter.GetData.Rows.Count > 0 Then
drSyncResult = Me.V_SyncStatusTableAdapter.GetData.Rows(0)
Now this is obviously because the table adapter hasn't and AFAIK can't be put into the ApplicationEvents.vb file.
I know that the dataset is called: dsetWorkingTables and the table is called v_SyncStatus. I have tried:
dsetWorkingTablesTableAdapters.v_SyncStatusTableAdapter.GetData but that gives:
reference to non shared member requires object reference
So my question is:
How do I get data from a dataset in the ApplicationEvents.vb file?
You need to referene your table adapter against the form class it exists in. Even with forms, you can still access methods on the forms as you will, what you want to avoid is form.Show() which will case the form to appear on screen.
Is your table adapter in a separate project from your Application Events? If so, you need to reference that project.
Table Adapters are not just for GUI, they can be used in batch or console apps as well.