C#：EXCEL列名、列序号之间互相转换

EXCEL的列名与列序号 之前的关系如下

A	1
B	2
C	3
D	4
E	5
F	6
G	7
H	8
I	9
J	10
K	11
L	12
M	13
N	14
O	15
P	16
Q	17
R	18
S	19
T	20
U	21
V	22
W	23
X	24
Y	25
Z	26
AA	27
AB	28

        /// <summary>/// 根据给的EXCEL列序号，得出列名字母/// </summary>/// <param name="iColNum">序号</param>/// <returns>列名</returns>public string ColNum2Name(int iColNum){string result = "";if (iColNum < 1 || iColNum > 16384){throw new Exception("列号超出范围");}while (iColNum > 0){iColNum--; //列号是从1开始的，字母从0开始的result = (char)('A' + iColNum % 26) + result;iColNum /= 26;}return result;}/// <summary>/// 根据给出的EXCEL列名，转换成列序号/// </summary>/// <param name="sColName">列名</param>/// <returns>序号</returns>public int ColName2Num(string sColName){int result = 0;for (int i = 0; i < sColName.Length; i++){result *= 26;result += sColName[i] - 'A' + 1;}return result;}