How can i display appointed record counts in datagrid

Apr 7, 2009 at 7:25 AM
 I want to implement the paging feature of datagrid manully, since it is not supported by wpftoolkit.
Now problem is , i want to display twenty records one time in a page , and when next was clicked,
display next twenty.  I don't know how to control the count of displaying records ?

Thanks.