gridview binding

Question

i am using data set fetching data from xml now using linq query to join two table  after that i convert it into a data table , but it is not bind with gridview gives this error
The data source for GridView with id 'GridView1' did not have any properties or attributes from which to generate columns.  Ensure that your data source has content.
i check datatable by debugging tool datatable shows data but not bind grid view .