Intersoft Community - WebGrid Enterprise - Error casting from generic list to IHierarchicalList

Error casting from generic list to IHierarchicalList

mconstam — Thu, 10 Feb 2011 08:06:03 GMT

Thanks for your answer!

This worked fine!

regards Martin

Error casting from generic list to IHierarchicalList

Glayaar — Wed, 19 Jan 2011 21:49:39 GMT

In order to bind the CustomObject to the WebGrid, you will need a collection object which implements at least CollectionBase and IHierarchicalList. A sample for such scenario has been provided in the BindtoHierchicalCustomObject.aspx sample on the WebGrid sample. In the sample, the collection also implements IObjectRelations in order to support the hierarchical data.

In your scenario, you could opt to not implement the IObjectRelationssince you are not using hierarchical data.

Error casting from generic list to IHierarchicalList

mconstam — Wed, 19 Jan 2011 10:27:58 GMT

Hi!

I am trying to bind a custom object list to a WebGrid by using the ISDataSource. Its exact the same as in example BindingGenericCollection.aspx from
the ISDataSource samples.

I always get the error message:

Unable to cast object of type System.Collections.Generic.List[GridTest1.Customer] to type ISNet.WebUI.DataSource.IHierarchicalList

Can you help me please?

I have attached a piece of code to demonstrate the issue.

Thanks in advance for your help.

Best regards

Martin