Question Re: FORM LOAD -> after possible (B1DE) ?? No items in Enterprise Resource Planning Q&A

FORM LOAD -> after possible (B1DE) ?? No items

Former Member — Mon, 20 Feb 2006 14:05:10 GMT

I try to do things just AFTER the form has finished loading,

so I can fill some things e.g. a picturebox.

But the problem is, that when I try to get the

item, there is nothing. (itemscount = 0)

Have you a best practice example, please.

Or could you give me a hint ?

Isn't there a AFTERLOAD ??

Regards,

Holger

PS: Pleeeeeeeaaaaaase, makers of B1DE, pleaaaaaaaase give me a hint, how you are using the framework. What's the best practice ???? Tried it in the blog and here ...... no answers ?!

Re: FORM LOAD -> after possible (B1DE) ?? No items

Trinidad — Tue, 21 Feb 2006 08:53:42 GMT

Hi Holger,

Here you have a message talking about how to modify a system form:

Nevertheless it does not work for the forms you create by yourself.

What I can propose you as a workaround is to:

1. Listen the FormLoad and the Activate events.

2. Set a flag when you receive the event FormLoad.

3. On the Activate event "in the case this flag is set" you do the actions you need to.

Hope it helps

Trinidad.

Re: FORM LOAD -> after possible (B1DE) ?? No items

Former Member — Fri, 24 Feb 2006 12:58:33 GMT

Hi Trinidad,

if I do this with the B1DE, I get in the activate-event, that the Flag is set but the itemscount is 0

<B1Listener(BoEventTypes.et_FORM_LOAD, False)> _

Public Overridable Function OnFormLoad(ByVal pVal As ItemEvent) As Boolean

'GENERATED CODE

B1FolderMgr.Init(pVal)

Dim form As Form = B1Connections.theAppl.Forms.Item(pVal.FormUID)

FormLoadFlag += 1

Return True

End Function

<B1Listener(BoEventTypes.et_FORM_ACTIVATE, False)> _

Public Overridable Sub OnAfterFormActivate(ByVal pVal As ItemEvent)

Dim ActionSuccess As Boolean = pVal.ActionSuccess

Dim form As Form = B1Connections.theAppl.Forms.Item(pVal.FormUID)

Debug.WriteLine("FORMACTIVATE ! FormLoadFlag = " & FormLoadFlag & " : ItemCount : " & form.Items.Count)

If FormLoadFlag > 0 Then

Debug.WriteLine("Formload finished ! " & FormLoadFlag & " : ItemCount : " & form.Items.Count)

End If

Any ideas ?

Regards,

Holger

Re: FORM LOAD -> after possible (B1DE) ?? No items

Trinidad — Mon, 27 Feb 2006 09:32:37 GMT

Hi Holger,

I have obtain the same result as you...

With the EventSpy tool provided with the SDK you can have a look to the events fired when you open your form and take the event that fits for your needs.

Everytime you open the form you have a GotFocus on one of the items of the form, maybe you can capture this event and do your actions at this moment.

Hope it helps

Trinidad.

Re: FORM LOAD -> after possible (B1DE) ?? No items

Former Member — Mon, 27 Feb 2006 13:07:56 GMT

Hi Trinidad,

in the Menu-class, where the menu is clicked, I did the following :

<B1Listener(BoEventTypes.et_MENU_CLICK, true)> _

Public Overridable Function OnBeforeMenuClick(ByVal pVal As MenuEvent) As Boolean

'GENERATED CODE

Me.LoadForm()

Dim form As New Form__SAS_UDO1

Dim UID As String

UID = B1Connections.theAppl.Forms.ActiveForm.UniqueID

'''At this point the form is ready loaded

form.formReady(UID)

Return false

End Function

In the form-class, I defined this function.

''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''

''' This simulates a afterFormLoad Event

''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''

Public Function formReady(ByVal UID) As Boolean

Try

Dim form As Form = B1Connections.theAppl.Forms.Item(UID)

Debug.WriteLine("UID: " & UID & "ItemCount : " & Me.getItemCount(UID))

form.Freeze(True)

form.Mode = BoFormMode.fm_OK_MODE

B1Connections.theAppl.ActivateMenuItem("1290")

form.Freeze(False)

Catch ex As Exception

End Try

End Function

This works fine

Regards,

Holger

Message was edited by: Holger Reppert

Re: FORM LOAD -> after possible (B1DE) ?? No items

Former Member — Thu, 26 Jul 2007 14:31:35 GMT

Hi Trinidad,

I have made a dirty workaround to solve this "litle" problem, I have edited B1DE classes and when a form load is raised I put this event in a new thread and waiting until form load, and them I call back this event. Now I can use form load with B1DE without problems, "for now..."

Did you now any problems with the use of threads and SBO?

Here, follows some changed code of B1Listeners.cs:

...

/// <summary>

/// Handles all ItemEvents

/// and calls all the listeners registered to the received EventType.

/// </summary>

/// <param name="formUID">Unique ID of the form that received this event</param>

/// <param name="__ItemEvent">ItemEvent information</param>

/// <param name="bubbleEvent">Specifies whether or not the application will continue processing this event</param>

public void ItemHandler(string formUID, ref ItemEvent __ItemEvent, out bool bubbleEvent) {

bubbleEvent = true;

// get the event table

Hashtable table = (Hashtable)listenersTable[__ItemEvent.EventType];

if (table == null)

return;

// get the listener

B1Listener listener = (B1Listener)table[EventTables.GetEventKey(__ItemEvent)];

if (listener == null)

return;

#region WorkAround FormLoad Event

//// handle the event

//if (listener.Action.Action(listener.Method, __ItemEvent) == false)

// bubbleEvent = false;

if (string.IsNullOrEmpty(__ItemEvent.ItemUID) && !__ItemEvent.BeforeAction && (__ItemEvent.EventType == BoEventTypes.et_FORM_LOAD)) {

System.Threading.Thread _Thread = new System.Threading.Thread(WaitFormLoad);

WA_FormLoad_Params WAFLParams = new WAFormLoad_Params(listener.Action, listener.Method, __ItemEvent);

Thread.Start(WAFLParams);

} // if

else {

// handle the event

if (listener.Action.Action(listener.Method, __ItemEvent) == false)

bubbleEvent = false;

} // else

#endregion

}

...

Re: FORM LOAD -> after possible (B1DE) ?? No items

Trinidad — Fri, 27 Jul 2007 08:10:10 GMT

Hi Rodolpho,

I think your system is quite complicated if the form_load you are trying to catch is one of the forms you have opened. Is it the case?

When you open a form in your code you have access to it just after, why do you need the form_load event?

Regards

Trinidad.

Re: FORM LOAD -> after possible (B1DE) ?? No items

Former Member — Fri, 27 Jul 2007 12:16:29 GMT

> Hi Rodolpho,

> I think your system is quite complicated if the

> form_load you are trying to catch is one of the forms

> you have opened. Is it the case?

Yes, this is my case.

> When you open a form in your code you have access to

> it just after, why do you need the form_load event?

Cause I wanna load data in combobox that is not linked with UDO and matrix too, if I try to do that before the items of this form is loaded throw a exception, so I need wait for form load all items, and then populate my combo.

> Regards

> Trinidad.

Hi Trinidad,