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Yannick
903
Complex Business Object as datasource in UltraCombo, how to retrieve the nested list<> ?
posted

I enclose a sample.

My question should be pretty simple to datasource master but I'm quite a newbie in datasource world :)

 

I've a business object A that is composed of List<B> and List<C>  nested objects and an Id property. When binded as datasource, I can see only A as a column of the Ultracombo (seems logical).

I though I would see other bands to display List<B> and list<C> but it does not appear. I don't know how to retrieve the list from the selected row (as I can't use SelectedRow.Cells[columnName].Value as it doesn't appear as a column.

 

How do you proceed to retrieve the other parts of a "complex" object that has been loaded into a datasource and selected in the combo ?

Thanks for your tips :)

WindowsFormsApplication4.zip
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  • 69832
    Verified Answer
    Offline posted

    You could handle (for example) the ValueChanged event, get a reference to the underlying list object from the selected row's ListObject property, then upcast to the type of your business object:

    Example:
    void ultraCombo1_ValueChanged(object sender, EventArgs e)
    {
        UltraCombo combo = sender as UltraCombo;
        UltraGridRow selectedRow = combo != null ? combo.SelectedRow : null;
        if ( selectedRow != null )
        {
            A objectA = selectedRow.ListObject as A;
        }
    }

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