枚举目录名称子字符串组按发布

Question

I'm trying to make a lookup from a set of enumerated directories using the GroupBy function. I have part of the solution, but can't seem to figure out the rest.

The directories are in a format where the letters of Substring(3,6) are used as the main category and Substring(0,2) will be used as a subcategory.

IList<string> sliceSteppingList = mainFolder
    .EnumerateDirectories("?x??0?0*", SearchOption.TopDirectoryOnly)
    .Select(x => x.Name)
    .ToList();

This yields part of the solution, where the output is a sorted list and uses the categories like I wanted, but it has the entire folder name as under the groups, which is not what I want.

The folder names are in this format:

1x6A0A0 1x6C0C0 3x8A0A0 3x8B0B0 3x8C0C0 5x8A0A0 1x6A0A0SS0 1x6A0A0SS1 1x6A0A0SS2

What I want it a lookup that has a dictionary or lookup something like this

-A0 +1x6 +5x8 -B0 +3x8 -C0 +1x6 +3x8

The part with the SSx is would be considered a selection after the main and subcategories are chosen, but I'm not sure what to do with that part yet.

Answer 1

From what I understand from your question and sample output, you are looking for a GroupBy like this:

var sliceSteppingList = mainFolder
    .EnumerateDirectories("?x??0?0*", SearchOption.TopDirectoryOnly)
    .Select(dirInfo => dirInfo.Name)
    .GroupBy(dirName => dirName.Substring(3, 4), dirName => dirName.Substring(0, 3))
    .OrderBy(group => group.Key);

Here's an example of a way to display the output:

foreach (var item in sliceSteppingList)
{
    Console.WriteLine($"-{item.Key}");

    foreach (var subDir in item)
    {
        Console.WriteLine($" +{subDir}");
    }
}

Output