How to find Duplicate in list of class and throw exception

Question

0.00/5 (No votes)

See more:

I have a list in which it contain ID,Bankmisid
so the data list contain is like

Bankmisid | ID
1 | 45
2 | 45
3 | 45
4 | 46

so i need to find duplicate and throw exception

Posted 20-Jan-16 22:48pm

Aviinash

Updated 21-Jan-16 0:06am

v2

Add a Solution

1 solution

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)

OriginalGriff · Answer 1 · 2016-01-20T23:05:00

Solution 1

Try:

C#

if (myList.GroupBy(i => i.ID).Where(g => g.Count > 1).Select(g => g.Key).Count() > 0)
   {
   throw ...

[edit]Oops![/edit]

Posted 20-Jan-16 23:05pm

OriginalGriff

Updated 21-Jan-16 0:19am

v2

Comments

Aviinash 21-Jan-16 6:10am

It is showing error g does not exist in current context

F-ES Sitecore 21-Jan-16 6:20am

if (myList.GroupBy(i => i.ID).Where(g => g.Count() > 1).Select(g => g.Key).Count() > 0)

OriginalGriff 21-Jan-16 6:20am

I forgot the lambda prefix!
Fixed.