Data Binding methods such as eval (), XPath (), and bind () can only be used in the context of a data binding control.

When you use aspxcombobox to edit data in aspxgridview, if this part is not found:

 
<DX: gridviewdatacolumn caption = "series oid" fieldname = "seriesoid" visible = "false"> </dx: gridviewdatacolumn>
 

This error may occur:

Data Binding methods such as eval (), XPath (), and bind () can only be used in the context of a data binding control.

<DX: gridviewbandcolumn caption = ""> <columns> <DX: gridviewdatacolumn caption = "oid" fieldname = "seriesoid" visible = "false"> </dx: gridviewdatacolumn> <DX: gridviewdatacolumn caption = "series ID" fieldname = "csmachinessery. seriesaid "> <editformsetaskcaption =" category/series: "/> <edititemtemplate> <DX: aspxcombobox runat = "server" id = "combobox_series" performanceid = "performance_machineseries" width = "100%" textfield = "name" valuefield = "seriesoid" valuetype = "system. int32 "value = '<% # BIND (" seriesoid ") %>'> <columns> <DX: listboxcolumn fieldname =" seriesaid "caption =" ID "/> <DX: listboxcolumn fieldname = "name" caption = "name"/> </columns> </dx: aspxcombobox> </edititemtemplate> </dx: gridviewdatacolumn> <DX: gridviewdatacolumn caption = "series name" fieldname = "csmachinessery. name "> <editformsetaskvisible =" false "/> </dx: gridviewdatacolumn> </columns> </dx: gridviewbandcolumn>