Click here to Skip to main content
12,818,664 members (30,284 online)

How to use LINQ for searching a datatable with some row deleted?

daiwuju asked:

Open original thread
I have a datatabel, in which I want to find any duplicated record(for example, the mobile phone number). I use following code in LINQ:
var list_mobile = dataTable_QueryResult.Rows.OfType<DataRow>().Select(x => x["mobile"].ToString());
var q_mobile = from x in list_mobile
           group x by x into g
           let count = g.Count()
           orderby count descending
           select new { Value = g.Key, Count = count };

foreach (var x in q_mobile)
    if (x.Count > 1)
        Label_Alarm.Visible = true;

It comes an error when some rows have been deleted - visiting the row that has been deleted. I want to use the Where() command to exclude those deleted rows, but I don't know how to code it in LINQ? Could anyone help me this ? Thanks!
Tags: C#, LINQ


When answering a question please:
  1. Read the question carefully.
  2. Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
  3. If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Let's work to help developers, not make them feel stupid.
Please note that all posts will be submitted under the The Code Project Open License (CPOL).

Advertise | Privacy | Mobile
Web02 | 2.8.170308.1 | Last Updated 26 Mar 2009
Copyright © CodeProject, 1999-2017
All Rights Reserved. Terms of Service
Layout: fixed | fluid

CodeProject, 503-250 Ferrand Drive Toronto Ontario, M3C 3G8 Canada +1 416-849-8900 x 100