Hi,

I'm still making tests.

I put a list view in a Micro Four User Control which is contained in a Micro Four Form and the time of loading is 2800 ms.

When I put directly the same list in a Micro Four Form, the time is about 450 ms.

What are the reasons of this difference ?

Best regards

David

Hi

I succeed to load a listview in an user control with a designer. But I'm not sure you understand my problem.
I want to add an user control by code
UserControl _uc = new UserControl();

I wonder how to link a BO in the form and in the user control in the code and set the PopulationDataSourceSettings.

If I understand you correctly, you want to programatically add your user control (that contains a listview) to a form, then setup the listview to use data from a BO on the form. Assuming this is what you want to do, you have a few options:



- Expose the listview as a readonly property of the user control so you can setup it up in code. I.e. you'd use client code (the code in your form) something like:







- If you are always going to populate the list view from an external BO using CopyDataFrom, you'd be better off to just setup the listview in the user control that way, and add a BO property to your user control of type BusinessLayer. You'd then handle the ListPopulating event within the user control. The client code would then become:







The code may not be entirely accurate, I just typed it in, but hopefully it gives you an idea of what you might want to do.

You're right Greg. I want to programatically add an user control in my form.

I set the properties by code but nothing happened. I may forgot something but why I don't know.

public Form1()
{
InitializeComponent();
_clientBO = new ClientBO();
_clientBO.ParentFormLoading += new MicroFour.StrataFrame.UI.IInitOnFormLoad.ParentFormLoadingEventHandler(_clientBO_ParentFormLoading);
_clientBO.ParentContainer = this;
_clientBO.SynchronizingObject = this;
_ucClient = new ucClient();
this.PrimaryBusinessObject = _clientBO;
_BOTranslationItem1.DestinationBusinessObject = "_ucClient.clientBO1";
_BOTranslationItem1.SourceBusinessObject = "Form1._clientBO";
_ucClient.BOTranslations.AddRange(new MicroFour.StrataFrame.UI.Windows.Forms.BusinessObjectTranslationItem[] {
_BOTranslationItem1});
_ucClient.Dock = System.Windows.Forms.DockStyle.Fill;
_ucClient.ParentContainer = this;
_ucClient.TranslationObject = this;
this.Controls.Add(_ucClient);
}
void _clientBO_ParentFormLoading()
{
_clientBO.RetournerTousClients();
}

David,



I see a couple of things that don't make sense:



- Were are you calling Requery() on the listview in your user control?



- I'm thinking that _clientBO.RetournerTousClients(); is a fill method that fills the _clientBO with data. Are you thinking that this will somehow fill your listview? Even if the listview is configured to use the same type of BO as the local instance _clientBO, it won't use that instance. The listview creates its own instance.



If you'd like to use the data from _clientBO to fill the listview, then you need to configure the listview to use the CopyDataFrom method using the businesslayer overload. Then you must either pass in the appropriate parameters to the Requery() method OR handle the ListPopulating method and provide those parameters. In almost all cases it is better to handle the event. Hope this is starting to make sense.