class1.cs

對c#初學者參考..為課題asp.net 2.0教材代碼

[Designer(typeof(MultiRegionControlDesigner))]
[ToolboxData("<{0}:MultiRegionControl runat=\"server\" width=\"100%\">" +
    "</{0}:MultiRegionControl>")]
public class MultiRegionControl : CompositeControl
{

    // Define the templates that represent 2 views on the control
    private ITemplate _view1;
    private ITemplate _view2;

    // These properties are inner properties
    [PersistenceMode(PersistenceMode.InnerProperty), DefaultValue(null)]
    public virtual ITemplate View1
    {
        get { return _view1; }
        set { _view1 = value; }
    }

    [PersistenceMode(PersistenceMode.InnerProperty), DefaultValue(null)]
    public virtual ITemplate View2
    {
        get { return _view2; }
        set { _view2 = value; }
    }

    // The current view on the control; 0= view1, 1=view2, 2=all views
    private int _currentView = 0;
    public int CurrentView
    {
        get { return _currentView; }
        set { _currentView = value; }
    }

    protected override void CreateChildControls()
    {
        Controls.Clear();

        ITemplate template = View1;
        if (_currentView == 1)
            template = View2;

        Panel p = new Panel();
        Controls.Add(p);

        if (template != null)
            template.InstantiateIn(p);
    }
}