如何部分更改合并单元格的边框？

Question

所以给出了这段代码：

var mergeCells = worksheet.Cells["A1:B5"];
mergeCells.Merge = true;
mergeCells.Style.Border.BorderAround(ExcelBorderStyle.Medium);

var notWorkingCell = worksheet.Cells["C1"];
notWorkingCell.Style.Border.Right.Style = ExcelBorderStyle.Medium;
notWorkingCell.Style.Border.Left.Style = ExcelBorderStyle.None; // <--This does not happen

我希望左侧边界notWorkingCell (C1)将被删除。这种情况没有发生：

documentation

如何部分更改合并单元格的边框？使用纯Excel可以实现。

Answer 1

看起来边框样式需要在合并单元格中的单元格地址上显式设置，而不是ExcelRange：

var mergeCells = worksheet.Cells["A1:B5"];
mergeCells.Merge = true;
mergeCells.Style.Border.BorderAround(ExcelBorderStyle.Medium);

var notWorkingCell = worksheet.Cells["C1"];
notWorkingCell.Style.Border.Right.Style = ExcelBorderStyle.Medium;

var cellToLeft = notWorkingCell.Start;
worksheet.Cells[cellToLeft.Row, cellToLeft.Column - 1]
    .Style.Border.Right.Style = ExcelBorderStyle.None;