C#中 Excel列字母与数字的相互转换 

 1 //Excel列字母转数字
 2 public static int ToIndex(string columnName)
 3 {
 4     if (!Regex.IsMatch(columnName.ToUpper(), @"[A-Z]+")) { throw new Exception("invalid parameter"); }
 5 
 6     int index = 0;
 7     char[] chars = columnName.ToUpper().ToCharArray();
 8     for (int i = 0; i < chars.Length; i++)
 9     {
10         index += ((int)chars[i] - (int)'A' + 1) * (int)Math.Pow(26, chars.Length - i - 1);
11     }
12     return index - 1;
13 }
14 
15 //Excel数字转列字母
16 public static string ToName(int index)
17 {
18     if (index < 0) { throw new Exception("invalid parameter"); }
19 
20     List<string> chars = new List<string>();
21     do
22     {
23         if (chars.Count > 0) index--;
24         chars.Insert(0, ((char)(index % 26 + (int)'A')).ToString());
25         index = (int)((index - index % 26) / 26);
26     } while (index > 0);
27 
28     return String.Join(string.Empty, chars.ToArray());
29 }

 

posted @ 2020-09-10 16:38  Uniqueness  阅读(1246)  评论(0)    收藏  举报