c# - Linq to Sql Update on extracted list not working -

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i having issues updating database using linq sql. have master query retrieves records in database (16,000 records)

postdatacontext ctxpost = new postdatacontext(); int n = 0;     var d = (from c in ctxpost.pwc_gs                     c.status == 1                     select c);

i take first 1000, , pass to object after modification using following query:

var cr = d.skip(n).take(1000);

i loop through records using foreach loop

foreach (var _d in cr) { // stuffs here _d.status = 0; }

i call submitchanges

ctxpost.submitchanges();

no record gets updated

thanks all. missing primary key on id field in dbml file.


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