How to replace the GridSize designtime property on a Custom Control with my own

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Robin Sanner - 09 Apr 2005 18:22 GMT

I have a new custom control. By default the custom control has the
design-time property GridSize. I want my custom control to have it's own
GridSize property that works in both design time and in run time and be
browsable in design-time. I used PostFilterProperties to get rid of the
original GridSize property but how do I retrieve the property descriptor for
the GridSize property on my control? If I try to use
TypeDescriptor.GetProperties(mycontrol)("GridSize") it causes
PostFilterProperties to run again and creates a stack overflow situation.

Thank you
Robin Sanner
robin.sanner@verizon.net

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Mujdat Dinc - 22 Apr 2005 12:59 GMT

Hi Robin..
Try this..
// Your designers override code
protected override void PreFilterProperties(System.Collections.IDictionary
properties)
{
base.PreFilterProperties (properties);
PropertyDescriptor pd = properties["GridSize"] as PropertyDescriptor ;
if(pd != null && pd.DesignTimeOnly )
properties.Remove("GridSize");
}

Mujdat

>I have a new custom control. By default the custom control has the
>design-time property GridSize. I want my custom control to have it's own
[quoted text clipped - 8 lines]
> Robin Sanner
> robin.sanner@verizon.net

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Robin Sanner - 26 Apr 2005 22:07 GMT

That gets rid of the design time GridSize property but I still can't see the
GridSize property that is on my control.

> Hi Robin..
> Try this..
[quoted text clipped - 23 lines]
>> Robin Sanner
>> robin.sanner@verizon.net

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Mujdat Dinc - 28 Apr 2005 15:36 GMT

Robin,
Yes you are right .It s happenning because of the base object Prefilter
call overwrites original Properities..
If you save the original, call base , remove design time and restore
original ,it will work.
The second approch is more complex. It is implementing CustomProperty
descriptor..

protected override void PreFilterProperties(System.Collections.IDictionary
properties)
{
//Save objects runtime property before base call overrite it
PropertyDescriptor pdObject = properties["GridSize"] as
PropertyDescriptor ;
// Fill design time properties
base.PreFilterProperties (properties);

//Restore runtime property
properties["GridSize"] = pdObject;

}

> That gets rid of the design time GridSize property but I still can't see
> the GridSize property that is on my control.
[quoted text clipped - 25 lines]
>>> Robin Sanner
>>> robin.sanner@verizon.net

Reply to this Message

How to replace the GridSize designtime property on a Custom Control with my own

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