""Jeffrey Tan[MSFT]"" wrote:

> Hi,
>
> Based on my understanding, you want to display the "deep" property of your
> custom class in DataGrid Column.
>
> Currently, .Net databinding still does not support deep databinding for
> datasource. For your senario, the winform datagrid can only reflect the
> first level properties of OuterObject class, then use these property type's
> string representation for the first level property as column text.
>
> For your requirement of display the deep property, the simplest way is
> overriding InnerObject class's ToString() method, just return
> InnerObject.Name property as the "InnerObject" type's string
> representation. This is a little trick, which just change the type's string
> representation logic to workaround this issue. But this trick will change
> entire InnerObject class's string representation logic, which you may do
> not want to do.
>
> The solid solution for this issue is implement ICustomTypeDescriptor
> interface for your OuterObject, this interface gives "OuterObject" a
> description of the properties and enables you to create or remove or modify
> the a class's properties at runtime. We can override
> ICustomTypeDescriptor.GetProperties method, then find the "InnerObject"
> property and return this inner "Name" property.
>
> But for DataGrid to query the ICustomTypeDescriptor interface of
> OuterObject class, we should implement a strong typed collection of
> OuterObject, which implemented ITypedList interface. Then the DataGrid will
> call ICustomTypeDescriptor interface when doing databinding.
>
> For more information, please refer to my original post:
> http://groups.google.com/groups?hl=zh-CN&lr=&c2coff=1&threadm=4K6Ioo3fEHA.33
> 40%40cpmsftngxa06.phx.gbl&rnum=2&prev=/groups%3Fq%3D%2BICustomTypeDescriptor
> %2BDataGrid%2BITypedList%2B%2522Jeffrey%2522%26hl%3Dzh-CN%26lr%3D%26c2coff%3
> D1%26selm%3D4K6Ioo3fEHA.3340%2540cpmsftngxa06.phx.gbl%26rnum%3D2
>
> For example of how to implement ITypedList and ICustomTypeDescriptor,
> please refer to the following article:
> http://weblogs.asp.net/fbouma/articles/115837.aspx
> http://www.codeproject.com/cs/database/itypedlist.asp?df=100&forumid=15239&e
> xp=0&select=491147
>
> Hope this helps
> =======================================
> Thank you for your patience and cooperation. If you have any questions or
> concerns, please feel free to post it in the group. I am standing by to be
> of assistance.
>
> Best regards,
> Jeffrey Tan
> Microsoft Online Partner Support
> Get Secure! - www.microsoft.com/security
> This posting is provided "as is" with no warranties and confers no rights.
>