C＃如何将以下表示形式的excel单元格地址转换为“ LetterNumber”到“ Number，Number”，反之亦然？

Question

如何将以下表示形式的Excel单元格地址转换为“ LetterNumber”到“ Number，Number”，反之亦然？

Answer 1

I'm trying to set the value of Worksheet.Cells[] but it does not except the "B3" kinds of values

Worksheet.Range does:

Worksheet.Range("A4").Value = "Foo";

I would also advise you not to set one cell at a time if you can help it. Every call to Cells or Range in a slow interop call, so you'll get much better performance if you put your values in an array and set the value of an entire range in one shot:

int[,] values;
// fill values with integers
Worksheet.Range("A1","D4") = values;

Answer 2

Well, even if the question wasn't clear, here is an answer for:

How can I convert an excel cells address in the following notation: "LetterNumber" to "Number, Number" and vice-versa?

private const string ALPHABET = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";

public static string ToExcelCoordinates(string coordinates)
{
    string first = coordinates.Substring(0, coordinates.IndexOf(','));
    int i = int.Parse(first);
    string second = coordinates.Substring(first.Length + 1);

    string str = string.Empty;
    while (i > 0)
    {
        str = ALPHABET[(i - 1) % 26] + str;
        i /= 26;
    }

    return str + second;
}

public static string ToNumericCoordinates(string coordinates)
{
    string first = string.Empty;
    string second = string.Empty;

    CharEnumerator ce = coordinates.GetEnumerator();
    while (ce.MoveNext())
        if (char.IsLetter(ce.Current))
            first += ce.Current;
        else
            second += ce.Current;

    int i = 0;
    ce = first.GetEnumerator();
    while (ce.MoveNext())
        i = (26 * i) + ALPHABET.IndexOf(ce.Current) + 1;

    string str = i.ToString();
    return str + "," + second;
}

The results are:

"1,1" -> "A1"
"A1" -> "1,1"
"42,231" -> "AP231"
"AP231" -> "42,231"