dynamic cast?

[Jamie McQuay]

I receive an object from an event and I need to go through a long list
of types to determine the type to cast to.
For example

if (myObject is A)
{
propertyGrid.Se lectedObject = (A)myObject;
}
else if (myObject is B)
{
propertyGrid.Se lectedObject = (B)myObject;
}


is there a way to do something like the following?

Type myType = myObject.GetTyp e();
propertyGrid.Se lectedObject = (myType )myObject;

Thanks,

Jamie

[Marc Gravell]

Re: dynamic cast?

Re my comment about faking it with PropertyDescrip tor, see here:

http://www.codeproject.com/KB/tabs/customizingcollectiondata.aspx

Marc

[Jamie McQuay]

Re: dynamic cast?

if (myObject is IListSource) { // special case; obtain

list
myObject = ((IListSource)m yObject).GetLis t();
}
if(myObject is IList) { // lists; show first item
myObject = ((IList)myObjec t)[0];
}
propertyGrid.Se lectedObject = myObject;
>

Hi Marc,

Perfect, this is what I'm looking for... thanks.

This is different yes... I'm displaying an xml based file format that
cantains lots of steps and lots of subitems. When I click on a
collection in the propertygrid I have a custom editor that loads the
names of each item in the collection into a listBox and the
propertygrid is set the the first one.

Thanks everyone,

Jamie

[Marc Gravell]

Re: dynamic cast?

This is different yes... I'm displaying an xml based file format that

cantains lots of steps and lots of subitems.  When I click on a
collection in the propertygrid I have a custom editor that loads the
names of each item in the collection into a listBox and the
propertygrid is set the the first one.

If you insist... but PropertyGrid has good support for UITypeEditor
and TypeConverter [noting in particular GetStandardValu es] which can
be made to do an awful lot of what you have just described... but if
you are happy...

Marc

[Jamie McQuay]

Re: dynamic cast?

If the item is indexed in some way, does it implement an interface that
you can cast it to, instead of having to cast to the specific instance?
Something like IList, or ICollection<T>? That way, you can access any
collection that implements one of those interfaces and then use the indexer
on the interface.

Using the IList interface did the trick... thanks.