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PropertyDescriptor is null issue

 
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billcch



Joined: 19 Jan 2007
Posts: 44
PostPosted: Fri May 23, 2008 2:09 am    Post subject: PropertyDescriptor is null issue Reply with quote
We are implementing dynamic list, and using GetCellData and SetCellValue to setup each cell, there is an UIEditor problem now...

Code:

TestEditor.PainValue(System.Drawing.Design.PaintValueEventArgs e)


which e.Context is UniversalEditBox, e.Context
e.Context .PropertyDescriptor is null

It is a problem for us, because we cannot modify all different UIEditors, and during SetCellValue, we only get information from xml file and create UIEditor instance through Refection class, which means the UIEditor is created in run-time.

Any suggestion?
Thanks.
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Infralution



Joined: 28 Feb 2005
Posts: 5027
PostPosted: Fri May 23, 2008 7:24 am    Post subject: Reply with quote
The UniversalEditBox ITypeDescriptorContext interface always returns null for PropertyDescriptor. This is because it does not implement a mechanism to get the original descriptor that might be associated with the value. Since values do not necessarily have an associated property descriptor you should probably not implement your editor so that it depends on getting one. If you give us a bit more detail about what you are trying to implement and what you were hoping to get from the PropertyDescriptor we may be able to suggest an alternative way of doing it.
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