How to convert sql query to linq using datatable.

Question

4.00/5 (1 vote)

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SQL

select DISTINCT targeturl from internal where TargetURL NOT in (select DISTINCT url from Internal)

using this query, but still not getting the correct result.

C#

var List1 = dt.AsEnumerable().Select(c => c.Field<string>("URL")).Distinct().ToList();
  var List2 = dt.AsEnumerable().Select(c => c.Field<string>("TargetURL")).Distinct().ToList();
  var Targetname = List2.Except(List1.ToList()).ToList();

Posted 10-Feb-15 23:08pm

Musakkhir

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3 solutions

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Herman<T>.Instance · Accepted Answer · 2015-02-10T23:36:00

Solution 1

Nice example in the first answer on this[^] page.

Posted 10-Feb-15 23:36pm

Herman<T>.Instance

Comments

Maciej Los 12-Feb-15 8:29am

+5!

Maciej Los · Accepted Answer · 2015-02-12T02:28:00

Solution 2

If i understand you correctly...
Try this:

C#

DataTable dstdt = dt.AsEnumerable().Select(c => c.Field<string>("TargetURL"))
                                .Except(dt.AsEnumerable().Select(c=>c.Field<string>("Url")))
                                .Distinct().CopyToDataTable();

Posted 12-Feb-15 2:28am

Maciej Los

Updated 12-Feb-15 2:29am

v2

Member 10971026 · Accepted Answer · 2015-02-12T02:29:00

Solution 3

DataTable dstdt = dt.AsEnumerable().Select(c => c.Field("TargetURL"))
.Except(dt.AsEnumerable().Select(c=>c.Field("Url")))
.Distinct().CopyToDataTable();

Posted 12-Feb-15 2:29am

Member 10971026