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QuestionDatabound column doesn't see inherited interface properties Pin
Joby17-Jul-08 6:08
Joby17-Jul-08 6:08 
I am data binding a DataGridView to a BindingList<t> where the type of the list's items "T" is an interface. Ex:
public class TowerList : BindingList< ITower >

The "ITower" interface descends from a base interface called "IModule" which has two properties, "PartNumber" & "PartDescription".
public interface IModule
{
    string PartNumber { get; }
    string PartDescription{ get; }
}

public interface ITower : IModule
{
    double Height { get; }
}

When I data bind a TowerList object to a DataGridView, and set the "DataPropertyName" of a column to "PartNumber" or "PartDescription", it seems that the data binding mechanism does NOT see the "PartNumber" and "PartDescription" properties which are inherited from the base "IModule" interface. The result is that the part number and part description strings do not show up in the grid.

If I "redeclare" the "PartNumber" and "PartDescription" properties directly in the "ITower" interface itself, then the data binding works and the part number and part description strings show up in the grid. Here is the new "ITower" interface:
public interface ITower : IModule
{
    double Height { get; }
    new string PartNumber { get; }
    new string PartDescription{ get; }
}

I know that if the list contained a set of regular object references (such as a "Tower" object) and not a list of "ITower" interfaces that the data binding would work and the inherited "PartNumber" and "PartDescription" properties would been "seen" by the data binding infrastructure. But.... I'm not sure why the "PartNumber" and "PartDescription" properties are not seen when the items in the list are interfaces. Any advice? Thank you for your help. Joby
AnswerRe: Databound column doesn't see inherited interface properties Pin
darkelv7-Jul-08 6:18
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GeneralRe: Databound column doesn't see inherited interface properties Pin
Joby17-Jul-08 7:50
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GeneralRe: Databound column doesn't see inherited interface properties Pin
Paul Fuller23-Jul-08 9:31
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GeneralRe: Databound column doesn't see inherited interface properties Pin
Joby124-Jul-08 4:21
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AnswerRe: Databound column doesn't see inherited interface properties Pin
Paul Fuller24-Jul-08 6:15
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QuestionData-bound DataGridView adds bogus empty row Pin
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Questionhow to stop the UPLOADING a file, or SAVING a file in middle by clicking cancel event. Pin
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protectorChristian Graus6-Jul-08 18:56 
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QuestionCustom DataBinding Question [modified] Pin
David Henry6-Jul-08 10:01
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