Solved

Help with Linq To Dataset

Posted on 2014-10-24
2
176 Views
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

Open in new window

0
Comment
Question by:Basicfarmer
2 Comments
 
LVL 35

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()

Open in new window

0
 

Author Closing Comment

by:Basicfarmer
ID: 40407073
Thanks for the solution. Exactly what I was missing...
0

Featured Post

Master Your Team's Linux and Cloud Stack

Come see why top tech companies like Mailchimp and Media Temple use Linux Academy to build their employee training programs.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

How to remove superseded packages in windows w60 or w61 installation media (.wim) or online system to prevent unnecessary space. w60 means Windows Vista or Windows Server 2008. w61 means Windows 7 or Windows Server 2008 R2. There are various …
Calculating holidays and working days is a function that is often needed yet it is not one found within the Framework. This article presents one approach to building a working-day calculator for use in .NET.
The goal of this video is to provide viewers with basic examples to understand and use switch statements in the C programming language.
This video teaches viewers about errors in exception handling.

777 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question