How to check that list class contains the object or not

Question

2.67/5 (3 votes)

See more:

Hi,

I need to add class to the list if the list does not already contains the class

I am trying something like this, but I do not understand how tto proceed further

C#

numofBuses = "3";
                select1 = "Red";
                select2 = "Yellow";
                select3 = "Green";
                select4 = "";


                GWmsgDetailsList = ResponseTimeofMsgs(numofBuses, select1, select2, select3, select4);
                
                foreach (var GatewayMessageDetails in GWmsgDetailsList)
                {


                    
                    GWmessageDetailsList.Add(GatewayMessageDetails);

                }
                
                select1 = "Red";
                select2 = "Green";
                select3 = "Yellow";
                select4 = "";

                GWmsgDetailsList = ResponseTimeofMsgs(numofBuses, select1, select2, select3, select4);
                foreach (var GatewayMessageDetails in GWmsgDetailsList)
                {
                     //if(GWmessageDetailsList.MsgId.Contains
                    GWmessageDetailsList.Add(GatewayMessageDetails);

                }

The foreach loop for first time is ok
But when it comes to second time , I need to check whether it the list class already contains the same MsgId or not, then I need to procedd.

Can anyone help me in writing the code for this

Thanks in advance

Posted 12-Mar-14 6:24am

Member 10408451

Add a Solution

Comments

BillWoodruff 12-Mar-14 22:58pm

Like almost all your questions posted here, you leave out critical pieces of information.

In this case, you don't show us the declaration of 'GWmsgDetailsList.

Also, repeating the code that inserts the same instances of the Class into 'GWmsgDetailsList makes no sense, at all.

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)

**Shelby Robertson** · Answer 1 · 2014-03-12T06:33:00

Solution 1

Assuming you are looking to see if an item exists with the same MsgId, this should work:

C#

foreach (var GatewayMessageDetails in GWmsgDetailsList)
{
       if(!GWmessageDetailsList.Any(g=> g.MsgId == GatewayMessageDetails.MsgId)
           GWmessageDetailsList.Add(GatewayMessageDetails);

}

Posted 12-Mar-14 6:33am

Shelby Robertson