Re: AddParsedSubObject and Multiple Identical Property Types

Hi Mark,

The TableItemStyle inherits from Style which associated a TypeConverter.

Here's a simple example on how to create a customized TypeConverter for a
custom property class:

public class MyTypeConverter : ExpandableObjectConverter
{
public override object ConvertTo(ITypeDescriptorContext context,
System.Globalization.CultureInfo culture, object value, Type
destinationType)
{
if (destinationType != typeof(string))
{
throw base.GetConvertToException(value, destinationType);
}
return string.Empty;
}
}

[TypeConverter(typeof(MyTypeConverter))]
public class MyProp2 : IStateManager
{
private string _name;

[NotifyParentProperty(true)]
public string Name
{
get { return _name; }
set { _name = value; }
}
private string _value;

[NotifyParentProperty(true)]
public string Value
{
get { return _value; }
set { _value = value; }
}

#region IStateManager Members

private bool _marked;

bool IStateManager.IsTrackingViewState
{
get { return _marked; }
}

void IStateManager.LoadViewState(object state)
{
if (state != null)
{
Pair p = (Pair)state;
_name = (string)p.First;
_value = (string)p.Second;
}
}

object IStateManager.SaveViewState()
{
return new Pair(_name, _value);
}

void IStateManager.TrackViewState()
{
_marked = true;
}

#endregion
}

public class MyControl2 : CompositeControl
{
private TableItemStyle _firstStyle;

[

DesignerSerializationVisibility(DesignerSerializationVisibility.Content),
NotifyParentProperty(true),
PersistenceMode(PersistenceMode.InnerProperty),
]
public TableItemStyle FirstStyle
{
get
{
if (_firstStyle == null)
{
_firstStyle = new TableItemStyle();
if (base.IsTrackingViewState)
{
((IStateManager)_firstStyle).TrackViewState();
}
}
return _firstStyle;
}
}

private MyProp2 _myprop2;

[
DesignerSerializationVisibility(DesignerSerializationVisibility.Content),
NotifyParentProperty(true),
PersistenceMode(PersistenceMode.InnerProperty),
]
public MyProp2 MyProp2
{
get
{
if (_myprop2 == null)
{
_myprop2 = new MyProp2();
if (base.IsTrackingViewState)
{
((IStateManager)_myprop2).TrackViewState();
}
}
return _myprop2;
}
}

}



#A Crash Course on ASP.NET Control Development: Building New Controls from
the Ground Up
http://msdn2.microsoft.com/en-us/library/aa479309.aspx

#A Crash Course on ASP.NET Control Development: Building Data-Bound Controls
http://msdn2.microsoft.com/en-us/library/aa479308.aspx

Regards,
Walter Wang (wawang@xxxxxxxxxxxxxxxxxxxx, remove 'online.')
Microsoft Online Community Support

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