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Help with Linq To Dataset

Posted on 2014-10-24
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Last Modified: 2016-02-15
Experts, I am having trouble getting a column from my datatable using a linq query. I fill the datatable from an SQL query. The column is an integer type. I can use the linq queries just fine with string columns but cannot get it to work on integers.

Please Help...

Column Name is "rWidth".
Dim query as iEnumerable(Of Integer)
Dim iList as New List(Of Integer)

query = From w in ds.tables("dtRibbon")
               Select w.Field(Of Integer)("rWidth")
               Distinct

iList = query.ToList

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Question by:Basicfarmer
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2 Comments
 
LVL 36

Accepted Solution

by:
Miguel Oz earned 500 total points
ID: 40403564
You are missing two constructs:
1) AsEnumerable. You can't query against the DataTable's Rows collection, since DataRowCollection doesn't implement IEnumerable<T>.
2) Distinct is a method call.
Modified query is shown below
query = (From w in ds.tables("dtRibbon").AsEnumerable()
               Select w.Field(Of Integer)("rWidth"))
               .Distinct()

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Author Closing Comment

by:Basicfarmer
ID: 40407073
Thanks for the solution. Exactly what I was missing...
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