How to Update Entries in a List here

Question

User321489315 posted

Hi All,

I am getting bit confusion while updating list. Please help me.

I have below 2 different lists

List<string> finalStudentList = new List<string> { "StudentNo1", "StudentNo2", "Student3", "StudentNo4", "Student5"};
List<string> reportedStudentList = new List<string> { "StudentNo2", "StudentNo5" };

i want to update the "finalStudentList", with matching entry in "reportedStudentList" with adding "Reported:" prefix, and other entieries with "NotReported" prefix.

my output should be like below

List<string> finalStudentList = new List<string> { "NotReported: StudentNo1", "Reported : StudentNo2", "NotReported: Student3", "NotReported: StudentNo4", "Reported : Student5" };

Please help me to achieve this.

Thanks in Advance,

Chandu

Answer 1

User-492460945 posted

Hi chandu,

Please check below working code,

List<string> finalStudentList = new List<string> { "StudentNo1", "StudentNo2", "Student3", "StudentNo4", "StudentNo5" };
            List<string> reportedStudentList = new List<string> { "StudentNo2", "StudentNo5" };

            for (int i = 0; i < finalStudentList.Count; i++)
            {
                int count = 0;
                for (int j = 0; j < reportedStudentList.Count; j++)
                {
                    if (finalStudentList[i] == reportedStudentList[j])
                        count++;
                }

                if (count > 0)
                    finalStudentList[i] = "reported: " + finalStudentList[i];
                else
                    finalStudentList[i] = "notreported: " + finalStudentList[i];
            }

Thanks,

RajeshV.

Answer 2

User-369506445 posted

Please try below code

var union=finalStudentList.Union(reportedStudentList);

var intersect=finalStudentList.Select(i=>i.ToString()).Intersect(reportedStudentList);

List<string> final=List<string>();
foreach(var item in union)
{
if(!intersect.Any(x=>x.Equals(item)))
{
final.Add("NotReported:"+item);
}else
{
final.Add(item);
}
}

In this sample ,first union two lists toghter and find intersect values between them and finally add additonal info to them