转换A到1 B到2 … Z到26然后AA到27 AB到28（列索引到Excel中的列引用）

是否有人将算法或逻辑转换为1，B转换为2，…，Z转换为26，然后AA转换为27，AB转换为28等。

换句话说，将列索引转换为Excel中的列引用。

Answer 1

看看这些

/// 
 /// 1 -> A
 /// 2 -> B
 /// 3 -> C
 /// ... /// 
 ///  ///  public static string ExcelColumnFromNumber(int column) { string columnString = ""; decimal columnNumber = column; while (columnNumber > 0) { decimal currentLetterNumber = (columnNumber - 1) % 26; char currentLetter = (char)(currentLetterNumber + 65); columnString = currentLetter + columnString; columnNumber = (columnNumber - (currentLetterNumber + 1)) / 26; } return columnString; } /// 
 /// A -> 1
 /// B -> 2
 /// C -> 3
 /// ... /// 
 ///  ///  public static int NumberFromExcelColumn(string column) { int retVal = 0; string col = column.ToUpper(); for (int iChar = col.Length - 1; iChar >= 0; iChar--) { char colPiece = col[iChar]; int colNum = colPiece - 64; retVal = retVal + colNum * (int)Math.Pow(26, col.Length - (iChar + 1)); } return retVal; } 

Answer 2

这是一个简单的LINQ表达式：

 static int TextToNumber(this string text) { return text .Select(c => c - 'A' + 1) .Aggregate((sum, next) => sum*26 + next); } 

这个测试

 Console.WriteLine(" A -> " + "A".TextToNumber()); Console.WriteLine(" B -> " + "B".TextToNumber()); Console.WriteLine(" Z -> " + "Z".TextToNumber()); Console.WriteLine("AA -> " + "AA".TextToNumber()); Console.WriteLine("AB -> " + "AB".TextToNumber()); 

将产生此输出：

  A -> 1 B -> 2 Z -> 26 AA -> 27 AB -> 28 

更新：这是相同的代码，但针对.NET 2.0：

 static int TextToNumber(string text) { int sum = 0; foreach (char c in text) { sum = sum*26 + c - 'A' + 1; } return sum; } 

Answer 3

如果您喜欢在客户端完成，这是JavaScript的代码

Answer 4

同样的问题，不同的语言：PHP。

 function charToInt($char) { $array = array_flip(range(a, z)); return $array[$char] + 1; } echo charToInt('c'); outputs: 3