VSTO 获取sheet单元格行列数

 1     Public Sub Igor()
 2         Dim Dtsheet As Excel.Worksheet
 3         Dim TotalC As Long             '原始数据范围列
 4         Dim TotalR As Long             '原始数据范围行
 5         Dtsheet = Globals.ThisWorkbook.Sheets("sheet1")
 6         TotalC = Dtsheet.Cells.SpecialCells(Excel.XlCellType.xlCellTypeLastCell).Column
 7         TotalR = Dtsheet.Cells.SpecialCells(Excel.XlCellType.xlCellTypeLastCell).Row
 8         Dtsheet.Range("A1", Dtsheet.Cells(TotalR, TotalC)).Replace(What:="", Replacement:="N/A", LookAt:=Excel.XlLookAt.xlWhole, SearchOrder:=Excel.XlSearchOrder.xlByRows, MatchCase:=False, SearchFormat:=False, ReplaceFormat:=False)
 9 
10     End Sub