迭代Excel引用范围的最快方法(“C20:F22”)

时间:2013-02-16 07:58:07

标签: c# excel range loops

假设此字符串变量是Excel中的一系列单元格:

string RangeReference = "C20:F22";

所以我需要RangeReference中的引用列表,如下所示:

List<string> GetAllReferencesInRange(string RangeReference) { }

对于这种情况,我们将:

GetAllReferencesInRange(RangeReference);
//=
//C20
//D20
//E20
//F20
//C21
//D21
//E21
//F21
//C22
//D22
//E22
//F22

如果RangeReference = "AG9:AI11";那么:

GetAllReferencesInRange(RangeReference);
//=
//AG9
//AH9
//AI9
//AG10
//AH10
//AI10
//AG11
//AH11
//AI11

那么最快的方法是什么?

更新

我知道这个问题根本无法与Excel相关,但我使用OpenXML SDK 2.5来获取Excel文件和元素,所以也许在OpenXML中有一种我不知道的简单方法。

2 个答案:

答案 0 :(得分:2)

我找到了一些东西,但我不知道这是否是最快的方式。

首先,我建立了一个存储列名和相关数字的字典:

Dictionary<string, ulong> ColumnsInNumber = new Dictionary<string, ulong>();
string Alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
ulong SpecialNumber = 0;

foreach (char FirstChar in Alphabet)
   ColumnsInNumber.Add(FirstChar.ToString(), SpecialNumber++);

foreach (char FirstChar in Alphabet)
   foreach (char SecondChar in Alphabet)
      ColumnsInNumber.Add(string.Format("{0}{1}", FirstChar, SecondChar), SpecialNumber++);

foreach (char FirstChar in Alphabet)
   foreach (char SecondChar in Alphabet)
      foreach (char ThirdChar in Alphabet)
          ColumnsInNumber.Add(string.Format("{0}{1}{2}", FirstChar, SecondChar, ThirdChar), SpecialNumber++);

在Excel 2010中,最后一列名称是“XFD”,在上面我们将数字设置为从“A”到“ZZZ”的列

所以我们可以迭代行和列:

string FirstColumn = GetColumnName(GetFirstCellReference(RangeReference));
string LastColumn = GetColumnName(GetLastCellReference(RangeReference));
uint FirstRow = GetRowNumber(GetFirstCellReference(RangeReference));
uint LastRow = GetRowNumber(GetLastCellReference(RangeReference));

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

for (uint row = FirstRow; row <= LastRow; row++)
{
   for (ulong column = ColumnsInNumber[FirstColumn]; column <= ColumnsInNumber[LastColumn]; column++)
   {
     string ColumnName = ColumnsInNumber.Where(kv => kv.Value == column).FirstOrDefault().Key;
     Result.Add(string.Format("{0}{1}", ColumnName, row));
   }
}

答案 1 :(得分:0)

首先检查它是否格式正确,然后:

    static readonly List<char> alphabetUpper = new List<char> { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z' };
    static public IEnumerable<string> GetRange(string arg)
    {
        arg = arg.ToUpperInvariant();
        string[] ranges = arg.Split(':');
        ulong range0 = ulong.Parse((new string((from char c in ranges[0] where char.IsDigit(c) select c).ToArray())));
        ulong range1 = ulong.Parse ((new string((from char c in ranges[1] where char.IsDigit(c) select c).ToArray())));
        ranges[0] = new string((from char c in ranges[0] where !char.IsDigit(c) select c).ToArray());
        ranges[1] = new string((from char c in ranges[1] where !char.IsDigit(c) select c).ToArray());
        IEnumerable<int> arrayindexes0 = from c in ranges[0] select alphabetUpper.IndexOf(c);
        IEnumerable<int> arrayindexes1 = from c in ranges[1] select alphabetUpper.IndexOf(c);
        foreach (IEnumerable<int> f in (from i in arrayindexes0 from e in arrayindexes1 select new List<int>() {i, e}))
        {
            foreach (int i in f)
            {
                foreach (ulong o in LongRange(range0, range1))
                {
                    yield return alphabetUpper[i] + o.ToString();
                }
            }
        }
    }
    static IEnumerable<BigInteger> LongRange (BigInteger first, BigInteger second)
    {
        BigInteger difference = second - first;
        for (BigInteger i = 0; i <= difference; i++)
        {
            yield return first + i;
        }
    }

暂时适用于单字母,我正在努力让更多行发生。