It is an often situation when a developer should include sever field values in a hyperlink shown in a GridView column cells. The best solution to this problem is to use templates. The attached example shows how this can be done and suggests two similar approaches:
1) in the "simple" case the href parameter of the <a> element is defined by the KeyValue of the processed row
2) in the "complex" case, the href parameter of the <a> element is defined in the server side GetRowValue method.
If you want to use GridViewDataHyperLinkColumn and preserve its functionality, use unbound columns instead of the DataItem template. Please refer to the ASPxGridView - How to create GridViewDataHyperLinkColumn whose URL depends on several column values example for more information.