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Inga Bemman
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Inga Bemman
asked on 01 Jul 2011, 05:15 AM
Hi,
I have an image column binded to an int and using converter to display an image. Everything works fine, sorting ok but it crashes app on grouping.
Error: System.Argument.Exception : At least one object must implement IComparable.
My Xaml below:
Thanks,
Inga
I have an image column binded to an int and using converter to display an image. Everything works fine, sorting ok but it crashes app on grouping.
Error: System.Argument.Exception : At least one object must implement IComparable.
My Xaml below:
<telerik:GridViewImageColumn Header="Alert" DataMemberBinding="{Binding PriorityID,Converter={StaticResource AlertImageConverter}}" ImageHeight="10" ImageWidth="10" GroupMemberPath="PriorityID" SortMemberPath="PriorityID" />Thanks,
Inga
2 Answers, 1 is accepted
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Hi Inga Bemman,
I have prepared an example project that illustrates a similar scenario. Here is the key: the converter is called in order to map the integer values to their respective BitmapImage values, and then the RadGridView is properly loaded. But when we try to group it by the GridViewImageColumn, the converter is called again trying to convert the respective GroupMemberPath value to a BitmapImage value, as it is designed to do so. BitmapImage doesn't implement IComparable, so it causes an exception. Please, refer to the attached project.
Regards,
Ivan Ivanov
the Telerik team
I have prepared an example project that illustrates a similar scenario. Here is the key: the converter is called in order to map the integer values to their respective BitmapImage values, and then the RadGridView is properly loaded. But when we try to group it by the GridViewImageColumn, the converter is called again trying to convert the respective GroupMemberPath value to a BitmapImage value, as it is designed to do so. BitmapImage doesn't implement IComparable, so it causes an exception. Please, refer to the attached project.
Regards,
Ivan Ivanov
the Telerik team
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Kevin
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answered on 16 May 2012, 04:32 AM
Ivan,
why is this what it was "designed to do"? It doesn't make any sense that it should be calling the converter when it bound to a different property. The example you gave is a hack, and only works because your GroupMemberPath property is a different type than the one you are basing the image off of.
This is a bug.
Thanks,
KB
why is this what it was "designed to do"? It doesn't make any sense that it should be calling the converter when it bound to a different property. The example you gave is a hack, and only works because your GroupMemberPath property is a different type than the one you are basing the image off of.
This is a bug.
Thanks,
KB