c# – EPPlus – 按索引而不是按字母表示法处理多个列

我在.Net项目中使用EPPlus将一些数据输出到Excel工作表中.

假设我想格式化具有特定格式的列E-G.使用EPPlus,我知道我可以这样做：

wks.Cells("E:G").Style.Numberformat.Format = ...

现在,我想知道,假设我想做同样的事情,但是通过他们的索引号而不是字母表示来引用列 – 理论上看起来像这样：

wks.Columns("5:7").Style.Numberformat.Format = ...

现在,我知道如果我做了这样的事情会有效：

wks.Cells(1,5,wks.Dimension.End.Row,7).Style.Numberformat.Format = ...

但我希望在EPPlus中有更好/更好的方法.有什么想法/建议？

谢谢！！

解决方法

作为我自己的问题的答案,为了帮助任何人,我最终创建了自己的扩展方法列,将列号转换为ExcelRange对象：

''' <summary>
''' Allows you to reference a column by its numeric index rather than its alphabetic representation
''' </summary>
''' <param name="colNum">The index of the column to reference on in the worksheet.</param>
<System.Runtime.CompilerServices.Extension()> _
Public Function Columns(ByVal wks As ExcelWorksheet,ByVal colNum As Integer) As ExcelRange
    Dim ColName As String = ReturnColumnName(colNum)

    Return wks.Cells(ColName & ":" & ColName)
End Function


''' <summary>
''' Allows you to reference a column by its numeric index rather than its alphabetic representation
''' </summary>
''' <param name="StartColNum">The start col num.</param>
''' <param name="EndColNum">The end col num.</param>
<System.Runtime.CompilerServices.Extension()> _
Public Function Columns(ByVal wks As ExcelWorksheet,ByVal StartColNum As Integer,ByVal EndColNum As Integer) As ExcelRange
    Dim StartColName As String = ReturnColumnName(StartColNum)
    Dim EndColName As String = ReturnColumnName(EndColNum)

    Return wks.Cells(StartColName & ":" & EndColName)
End Function



Private Function ReturnColumnName(ByVal colNum As Integer) As String
    Dim d As Integer
    Dim m As Integer
    Dim Name As String

    d = colNum
    Name = ""

    do while (d > 0)
        m = (d - 1) Mod 26
        Name = Chr(65 + m) + Name
        d = Int((d - m) / 26)
    Loop

    Return Name
End Function