从列表中获取唯一元素<String>

Question

I would like to remove the duplicate elements from a List. Some elements of the list looks like this:

Book  23
Book  22
Book  19
Notebook 23
Notebook 22
Notebook 19
Pen 23
Pen 22
Pen 19

I would like to keep in the list just

Book 23
Notebook 23
Pen 23

How can i do that ?

Answer 1

What about basic looping?

List<string> nodup = dup.Distinct().ToList();
List<int> remIndex = new List<int>();
for (int nIdx = 0; nIdx < nodup.Count; nIdx++)
{
    string[] strArr = nodup[nIdx].Split(' ');
    if (String.Compare(strArr[1], "23", true) != 0)
        remIndex.Add(nIdx);
}
foreach (int remIdx in remIndex)
    nodup.RemoveAt(remIdx);

Hope this is of some help...

Answer 2

try this

  List<Person> distinctPeople = allPeople
  .GroupBy(p => p.PersonId)
  .Select(g => g.First())
  .ToList();

from this discussion

use your column names

Answer 3

尝试这个

list.Sort();

Int32 index = 0; while (index < list.Count - 1) {
if (list[index] == list[index +1])
list.RemoveAt(index); else index++; }