c# - Datatable Addition to Dataset exception - 


dataset ds = dal.getdata(); dataset dsinvitee = null;  datatable dt = ds.tables[0].copy(); ienumerable<datarow> q1 = dt.asenumerable().skip(5).take(10);  dsinvitee = new dataset();  datatable dtnew = new datatable(); dtnew.tablename = "dtinv"; dtnew = q1.copytodatatable<datarow>(); dsinvitee.tables.add(dtnew.copy()); dsinvitee.acceptchanges();  dtnew = null; dtnew = new datatable(); dtnew.tablename = "dttags"; dtnew = ds.tables[1].copy(); dsinvitee.tables.add(dtnew.copy());

i getting error in last line "a datatable named 'table1' belongs dataset."... please help.

your issue because of line dtnew = q1.copytodatatable<datarow>();, because copytodatatable extension method:

returns datatable contains copies of datarow objects, given input ienumerable object generic parameter t datarow.

this means table name of "dtinv" gets blown away after call copytodatatable, dtnew no longer refers same datatable. move dtnew.tablename = "dtinv"; after call copytodatatable:

datatable dtnew = new datatable(); dtnew = q1.copytodatatable<datarow>(); dtnew.tablename = "dtinv"; dsinvitee.tables.add(dtnew.copy()); dsinvitee.acceptchanges();

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