Hello all. Using adapter:

I use the OnFieldChanged() event on a field to populate a DataSource as follows:

public CatalogueDetailForm(EntityBase2 entity)
            : base ()
        {   
            EntityBase2 Entity = entry ;
            InitializeComponent();
.....

            ((CatalogueDetailEntity)Entity).CatDetailCategoryKeyChanged += new EventHandler(KeyChanged);
        }

void KeyChanged(object sender, EventArgs e)
        {
            bindingSourceSubCategories.DataSource = ReferencesManager.GetCatalogueDetailSubCategoryList
                (((CatalogueDetailEntity)Entity).CatDetailCategoryKey) ;
        }
.....

Problem is, for whatever reason the KeyChanged delegate gets triggered several times when there's a simple change to the CatDetailCategoryKey value. Sometimes it gets triggered seven or eight times after a chane to CatDetailCategoryKey. Obviously, this creates a bottleneck since GetCatalogueDetailSubCategoryList makes a server call each time.

I'm aware that OnFieldChanged() events are used internally by LLBLGen. I haven't really dug deep into code to determine why this problem is happening but I'm wondering if its just not a good idea to use the OnFieldChanged() in this way.

Thanks.

Jeff

The event is fired when the field is actually changed (duh ) but only then. The OnfieldChanged event is only called frm the properties.

Could you set a breakpoint in the OnfieldChanged() method in the entity, please? And check at runtime each time what the stacktrace (when the breakpoint hits) to see where the call comes from?

Will do.