c# - 删除列表中包含相同内容的行

Question

我有一个包含如下内容的列表:

C12 0402 123456 90
C133 0402 123456 90
C9 0402 123456 90
C132 0603 abcd 0
C54 0603 abcd 0
R FID1 fiducial 0
R FID2 fiducial 0
R FID3 fiducial 0
R FID4 fiducial 0

我想检查列表中的每一行并确保没有添加重复项...我试过了，但我知道这里存在逻辑错误。

List<string> noDuplicatesList = new List<string>();

foreach (var line in theList)
{
    if (!noDuplicatesList.Contains(line.PartNumber)) //This is doing nothing...?
        noDuplicatesList.Add(line.Name + " " + line.PartDescription + " " line.PartNumber + " " + line.Rotation);
}

foreach (var line in noDuplicatesList)
{
    var splitLine = line.Split(' ');
    //Print out statements...
}

问题

如何删除/跳过包含相同值的行(在上面的示例中 123456、abcd、fiducial)，以便它只会打印这样的东西:

C12 0402 123456 90
C132 0603 abcd 0
R FID1 fiducial 0

Answer 1

是否只用第3列作为分组条件？

var noDuplicatesList = lines
    .GroupBy(l => l.PartNumber)
    .Select(group => group.First())

foreach(var item in noDuplicatesList)
    Console.WriteLine("{0} {1} {2} {3}", 
        item.Name,
        item.PartDescription,
        item.PartNumber,
        item.Rotation
    );

---

行:

C12 0402 123456 90
C133 0402 123456 90
C9 0402 123456 90
C132 0603 abcd 0
C54 0603 abcd 0
R FID1 fiducial 0
R FID2 fiducial 0
R FID3 fiducial 0
R FID4 fiducial 0

lines.GroupBy(l => l.PartNumber):

{ C12 0402 123456 90, C133 0402 123456 90, C9 0402 123456 90}
{ C132 0603 abcd 0, C54 0603 abcd 0 }
{ R FID1 fiducial 0, R FID2 fiducial 0, R FID3 fiducial 0, R FID4 fiducial 0 }

lines.GroupBy(l => l.PartNumber).Select(group => group.First()):

C12 0402 123456 90
C132 0603 abcd 0
R FID1 fiducial 0