Filtering data by LINQ to SQL

Question

0.00/5 (No votes)

See more:

Hi I have a problem while filtering my data.

I have two tables one is the main table where all the data is stored. There is another table where the keywords are stored which is required to filter data from Main table.

The problem i am facing is that i am not able to put up the exact query which is required as the keywords which arrive in the Main Table Data are required to be filtered out.

For example if there are 10 words in Keyword table then Main table data have to be searched thorough all these keywords so that it can be filtered out correctly.

I hope i have made the question clear.

Also i am using LINQ TO SQL solution in it is most welcome

Posted 15-Dec-13 19:36pm

Khawaja Jibran

Add a Solution

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
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.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

toni galani · Answer 1 · 2013-12-15T20:13:00

see below if this is what you are expecting:

DataTable table = new DataTable();
   table.Columns.Add("ID", typeof(int));
   table.Columns.Add("Drug", typeof(string));
   table.Columns.Add("Patient", typeof(string));
   table.Columns.Add("Date", typeof(DateTime));


   table.Rows.Add(25, "Indocin", "David", DateTime.Now);
   table.Rows.Add(50, "Enebrel", "Sam", DateTime.Now);
   table.Rows.Add(10, "Hydralazine", "Christoff", DateTime.Now);
   table.Rows.Add(21, "Combivent", "Janet", DateTime.Now);
   table.Rows.Add(100, "Dilantin", "Melanie", DateTime.Now);


   DataTable lookuptable = new DataTable();
   lookuptable.Columns.Add("lookupID", typeof(int));
   lookuptable.Rows.Add(25);
   lookuptable.Rows.Add(50);
   lookuptable.Rows.Add(10);
   lookuptable.Rows.Add(21);

   var col = from dr in table.AsEnumerable()
             join
             dr1 in lookuptable.AsEnumerable() on dr.Field<int>("ID") equals dr1.Field<int>("lookupID")
             select dr;

           foreach (var item in col)
   {
       Console.WriteLine(item.Field<string>("Patient"));
   }

           Console.ReadLine();

Karthik_Mahalingam · Answer 2 · 2013-12-15T21:28:00

hi
Try like this..

C#

using System.Collections.Generic;
using System.Linq;

namespace test
{

    class Program
    {
        static void Main(string[] args)
        {

            List<maintable> lstMainTable = new List<maintable>();
            lstMainTable.Add(new MainTable() { Name = "apple", Others = "aaa" });
            lstMainTable.Add(new MainTable() { Name = "ball", Others = "bbb" });
            lstMainTable.Add(new MainTable() { Name = "cat", Others = "ccc" });
            lstMainTable.Add(new MainTable() { Name = "dog", Others = "ddd" });
            lstMainTable.Add(new MainTable() { Name = "elepant", Others = "eeee" });
            lstMainTable.Add(new MainTable() { Name = "goat", Others = "ggg" });
            lstMainTable.Add(new MainTable() { Name = "kite", Others = "kkk" }); 
            lstMainTable.Add(new MainTable() { Name = "lemon", Others = "llll" });


            List<keywords> lstKeyWords = new List<keywords>();
            lstKeyWords.Add(new KeyWords() { Key = "apple", OtherColumn = "aa" });
            lstKeyWords.Add(new KeyWords() { Key = "cat", OtherColumn = "aa" });
            lstKeyWords.Add(new KeyWords() { Key = "goat", OtherColumn = "aa" });


            var lstOutput = lstMainTable.Where(k => lstKeyWords.Select(k0=>k0.Key).Contains(k.Name)).ToList();
            
        }
    }

    public class MainTable
    {
        public string Name { get; set; }
        public string Others { get; set; }
    }

    public class KeyWords
    {
        public string Key { get; set; }
        public string OtherColumn { get; set; }
    }
}

Filtering data by LINQ to SQL

2 solutions

Solution 1

Solution 2

Add your solution here

Preview 0