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Add GetCellColumnIndex

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This commit is contained in:
ITWeiHan 2021-03-09 12:03:41 +08:00
parent 25a4ac6026
commit d1fd5cfbc8
2 changed files with 91 additions and 63 deletions
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2
src/MiniExcel/MiniExcel.cs
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@ -212,7 +212,7 @@
var r = cell.Attribute("r")?.Value?.ToString();
{
var cellIndex = XlsxUtils.GetColumnIndex(r) - 1;
var cellIndex = XlsxUtils.GetCellColumnIndex(r) - 1;
columnIndexMaximum = Math.Max(columnIndexMaximum, cellIndex);
datarow.Add(cellIndex, v);

152
src/MiniExcel/XlsxUtils.cs
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@ -4,77 +4,105 @@
internal static class XlsxUtils
{
/// <summary>
/// Encode to XML (special characteres: &apos; &quot; &gt; &lt; &amp;)
/// </summary>
internal static string EncodeXML(object value) => value == null
? ""
: value.ToString().Replace("&", "&amp;").Replace("<", "&lt;").Replace(">", "&gt;").Replace("\"", "&quot;").Replace("'", "&apos;");
/// <summary>
/// Encode to XML (special characteres: &apos; &quot; &gt; &lt; &amp;)
/// </summary>
internal static string EncodeXML(object value) => value == null
? ""
: value.ToString().Replace("&", "&amp;").Replace("<", "&lt;").Replace(">", "&gt;").Replace("\"", "&quot;").Replace("'", "&apos;");
/// <summary>X=CellLetter,Y=CellNumber,ex:A1=(1,1),B2=(2,2)</summary>
internal static string ConvertXyToCell(Tuple<int, int> xy)
{
return ConvertXyToCell(xy.Item1, xy.Item2);
}
/// <summary>X=CellLetter,Y=CellNumber,ex:A1=(1,1),B2=(2,2)</summary>
internal static string ConvertXyToCell(Tuple<int, int> xy)
{
return ConvertXyToCell(xy.Item1, xy.Item2);
}
/// <summary>X=CellLetter,Y=CellNumber,ex:A1=(1,1),B2=(2,2)</summary>
internal static string ConvertXyToCell(int x, int y)
{
int dividend = x;
string columnName = String.Empty;
int modulo;
/// <summary>X=CellLetter,Y=CellNumber,ex:A1=(1,1),B2=(2,2)</summary>
internal static string ConvertXyToCell(int x, int y)
{
int dividend = x;
string columnName = String.Empty;
int modulo;
while (dividend > 0)
{
modulo = (dividend - 1) % 26;
columnName = Convert.ToChar(65 + modulo).ToString() + columnName;
dividend = (int)((dividend - modulo) / 26);
}
return $"{columnName}{y}";
}
while (dividend > 0)
{
modulo = (dividend - 1) % 26;
columnName = Convert.ToChar(65 + modulo).ToString() + columnName;
dividend = (int)((dividend - modulo) / 26);
}
return $"{columnName}{y}";
}
/// <summary>X=CellLetter,Y=CellNumber,ex:A1=(1,1),B2=(2,2)</summary>
internal static Tuple<int, int> ConvertCellToXY(string cell)
{
return Tuple.Create(GetColumnIndex(cell), GetCellNumber(cell));
}
/// <summary>X=CellLetter,Y=CellNumber,ex:A1=(1,1),B2=(2,2)</summary>
internal static Tuple<int, int> ConvertCellToXY(string cell)
{
return Tuple.Create(GetCellColumnIndex(cell), GetCellRowNumber(cell));
}
internal static int GetColumnIndex(string cell)
{
const string keys = " ABCDEFGHIJKLMNOPQRSTUVWXYZ";
const int mode = 26;
internal static int GetColumnNumber(string name)
{
int number = -1;
int pow = 1;
for (int i = name.Length - 1; i >= 0; i--)
{
number += (name[i] - 'A' + 1) * pow;
pow *= 26;
}
var x = 0;
var cellLetter = GetCellLetter(cell);
//AA=27,ZZ=702
for (int i = 0; i < cellLetter.Length; i++)
x = x * mode + keys.IndexOf(cellLetter[i]);
return number;
}
return x;
}
internal static int GetCellColumnIndex(string cell)
{
const string keys = " ABCDEFGHIJKLMNOPQRSTUVWXYZ";
const int mode = 26;
internal static int GetCellNumber(string cell)
{
if (string.IsNullOrEmpty(cell))
throw new Exception("cell is null or empty");
string cellNumber = string.Empty;
for (int i = 0; i < cell.Length; i++)
{
if (Char.IsDigit(cell[i]))
var x = 0;
var cellLetter = GetCellColumnLetter(cell);
//AA=27,ZZ=702
for (int i = 0; i < cellLetter.Length; i++)
x = x * mode + keys.IndexOf(cellLetter[i]);
return x;
}
internal static int GetCellRowNumber(string cell)
{
if (string.IsNullOrEmpty(cell))
throw new Exception("cell is null or empty");
string cellNumber = string.Empty;
for (int i = 0; i < cell.Length; i++)
{
if (Char.IsDigit(cell[i]))
cellNumber += cell[i];
}
return int.Parse(cellNumber);
}
}
return int.Parse(cellNumber);
}
internal static string GetCellLetter(string cell)
{
string GetCellLetter = string.Empty;
for (int i = 0; i < cell.Length; i++)
{
if (Char.IsLetter(cell[i]))
GetCellLetter += cell[i];
}
return GetCellLetter;
}
internal static string GetCellColumnLetter(string cell)
{
string GetCellLetter = string.Empty;
for (int i = 0; i < cell.Length; i++)
{
if (Char.IsLetter(cell[i]))
GetCellLetter += cell[i];
}
return GetCellLetter;
}
internal static string ConvertColumnName(int x)
{
int dividend = x;
string columnName = String.Empty;
int modulo;
while (dividend > 0)
{
modulo = (dividend - 1) % 26;
columnName = Convert.ToChar(65 + modulo).ToString() + columnName;
dividend = (int)((dividend - modulo) / 26);
}
return columnName;
}
}
}