remove duplicate string

Pooja Chowdhury

8y1kVisual Basic .NET

i have one list

List lstEmail = new List();

foreach (var item in lstEmail)

{

string[] strEmailIDs = item.EmailID.Split(',');

}

but i want to remove duplicate values from these string

11 Replies

Know the answer? Post it — somebody with the same question will find it here.

siddhartha sharna8y ago
List lstEmail = new List() ;
List final = new List();
foreach (var item in lstEmail)
{
string[] strEmailIDs = item.Split(',');

foreach (var x in strEmailIDs)
{
if (!final.Contains(x))
{ final.Add(x); }
}
}

Final List contains non duplicates reports.
Nanddeep Nachan8y ago
Use LINQ
var distinct = items.DistinctBy( i => i.EmailID );
Jayakumar Balasubramaniam8y ago
Okay.
Pooja Chowdhury8y ago
i am sorry to say i didnot add namespace
using System.Linq;

now all the code is working
Jayakumar Balasubramaniam8y ago
Hi,

The below code snippet works, fine for me.
string EmailID = "jai,arut,jai";
string[] strEmailIDs = EmailID.Split(',');
List<string> listEmailIDs = strEmailIDs.ToList();
List<string> distinct = listEmailIDs.Distinct().ToList();

EmailID = distinct.Aggregate((current, next) => current + "," + next);

Please try this.
Pooja Chowdhury8y ago
Please check
Jayakumar Balasubramaniam8y ago
Can you post error message or it's screen shot here ? so it would be easy to figure out the issue.
Pooja Chowdhury8y ago
string[] strEmailIDs = item.EmailID.Split(',');
List listEmailIDs = strEmailIDs.ToList();
List distinct = listEmailIDs.Distinct().ToList();
item.EmailID = distinct.ToArray();

i used this but same error show red color under Distinct()
Jayakumar Balasubramaniam8y ago
Please replace your foreach like below snippet, I beleive it will help you.
foreach (var item in lstEmail)
{
string[] strEmailIDs = item.EmailID.Split(',');
List<string> listEmailIDs= strEmailIDs.ToList();
List<string> distinct =  listEmailIDs.Distinct().ToList();

item.EmailID=distinct.ToArray(); // here we remvoed the duplicates and assigned to EmailID again
}
Pooja Chowdhury8y ago
i got error i want to remove in foreach loop
Jayakumar Balasubramaniam8y ago
Hi Pooja,
Do you want to remove duplicates from strEmailIDs? if so please follow below code snippet
List listEmailIDs= strEmailIDs.ToList();
List distinct = listEmailIDs.Distinct().ToList();
So basically we could use Distinct method to remove the duplicates.
Thanks,
Jayakumar B