Compare two list row by row and return boolen value [Resolved]

Posted by Allemahesh under LINQ on 10/28/2015 | Points: 10 | Views : 1628 | Status : [Member] [MVP] | Replies : 4

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I have a two IList say

List<Person> persons1 = new List<Person>
{
       new Person {Id = 1, Name = "Person 1"},
       new Person {Id = 2, Name = "Person 2"},
       new Person {Id = 3, Name = "Person 3"},
       new Person {Id = 4, Name = "Person 4"}
};

List<Person> persons2 = new List<Person>
{
       new Person {Id = 1, Name = "Person 1"},
       new Person {Id = 8, Name = "Person 8"},
       new Person {Id = 3, Name = "Person 3"},
       new Person {Id = 4, Name = "Person 5"},
};

If you see these two lists, 2 records are same and 2 are different. Now I want to loop these list and return true or false if bother are same.
For example:

new Person {Id = 1, Name = "Person 1"} == new Person {Id = 1, Name = "Person 1"} => true
new Person {Id = 2, Name = "Person 2"} == new Person {Id = 8, Name = "Person 8"} => false
new Person {Id = 3, Name = "Person 3"} == new Person {Id = 3, Name = "Person 3"} => true
new Person {Id = 4, Name = "Person 4"} == new Person {Id = 4, Name = "Person 5"} => false

Here I will 4 results with 2 are true and 2 are false.
Please help to do this using LINQ query.

[Resolved]

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Posted by: Sheonarayan on: 10/28/2015 [Administrator] HonoraryPlatinum | Points: 50

0	Assuming both List are of same length. In this case, first take the length of the list. var listLength = persons1.Count(); for (int i = 0; i < listLength; i++) { if (persons1[i].PropertyName ==persons2[i].PropertyName) { // equals } else { // this item is not equal } } This is little lengthy way but I think in your requirement where you need to get true/false for each item in the collection, this would fit best. Thanks Regards, Sheo Narayan http://www.dotnetfunda.com Allemahesh, if this helps please login to Mark As Answer. \| Alert Moderator

Assuming both List are of same length. In this case, first take the length of the list.

var listLength = persons1.Count();
for (int i = 0; i < listLength; i++)
{
    if (persons1[i].PropertyName ==persons2[i].PropertyName)
    {
         // equals
     }
    else
    {
        // this item is not equal
    }
}

This is little lengthy way but I think in your requirement where you need to get true/false for each item in the collection, this would fit best.

Thanks

Regards,
Sheo Narayan
http://www.dotnetfunda.com

Allemahesh, if this helps please login to Mark As Answer. | Alert Moderator

Posted by: Allemahesh on: 10/28/2015 [Member] [MVP] Silver | Points: 25

0	Thank you. But I want to do it with LINQ query. Can you help me. Allemahesh, if this helps please login to Mark As Answer. \| Alert Moderator

Posted by: Rajnilari2015 on: 10/29/2015 [Member] [Microsoft_MVP] [MVP] Platinum | Points: 25

0	Try this persons1.Select((x, i) => new { RowNum = i + 1, Id = x.Id, Name = x.Name }) .Join(persons2.Select((x, i) => new { RowNum = i + 1, Id = x.Id, Name = x.Name }), a => a.RowNum, b => b.RowNum, (a, b) => new { Person1 = a, Person2 = b}) .Select(p => p.Person1.Id == p.Person2.Id && p.Person1.Name == p.Person2.Name) .ToList() .ForEach(i => Console.WriteLine(i)); -- Thanks & Regards, RNA Team Allemahesh, if this helps please login to Mark As Answer. \| Alert Moderator

Try this


persons1.Select((x, i) => new { RowNum = i + 1, Id = x.Id, Name = x.Name })

.Join(persons2.Select((x, i) => new { RowNum = i + 1, Id = x.Id, Name = x.Name }),

a => a.RowNum, b => b.RowNum,

(a, b) => new { Person1 = a, Person2 = b})

.Select(p => p.Person1.Id == p.Person2.Id && p.Person1.Name == p.Person2.Name)

.ToList()

.ForEach(i => Console.WriteLine(i));

--
Thanks & Regards,
RNA Team

Allemahesh, if this helps please login to Mark As Answer. | Alert Moderator

Posted by: Rajnilari2015 on: 10/30/2015 [Member] [Microsoft_MVP] [MVP] Platinum | Points: 25

0	B/T, what happen to your question http://www.dotnetfunda.com/forums/show/20736/show-some-content-of-textbox-as-using-jquery The solution that we provided didn't worked...right ? Have some courtesy , by responding to the forums thread so that when another user have a similar kind of doubt we can point the same to him/her. That will save the time of a new discussion for an already old similar kind of discussion. I hope my words will be granted in a constructive way. -- Thanks & Regards, RNA Team Allemahesh, if this helps please login to Mark As Answer. \| Alert Moderator

B/T, what happen to your question http://www.dotnetfunda.com/forums/show/20736/show-some-content-of-textbox-as-using-jquery

The solution that we provided didn't worked...right ?

Have some courtesy , by responding to the forums thread so that when another user have a similar kind of doubt we can point the same to him/her. That will save the time of a new discussion for an already old similar kind of discussion.

I hope my words will be granted in a constructive way.

--
Thanks & Regards,
RNA Team

Allemahesh, if this helps please login to Mark As Answer. | Alert Moderator

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