如何一次更改几个单元格的边框样式。 NPOI

我想这样做： 问题

但是用NPOI来做吧。 有没有办法提供广场的4个“积分”，并改变其边界为我想要的？

Answer 1

不，没有，除非你自己编程。

此外，在NPOI（2.1.3.1）中的边框样式是错误的，基本上当您的ICellStyle与其他ICellStyle具有相同的边框样式（例如，两个单元格具有顶部黑色边框）并且您更改其中一个时，更改会传播到两种样式（例如，一旦您将左上边框添加到一个单元格，它也会添加到另一个单元格中）。

我已经创build了拉取请求，但是现在应该可以工作了（小心64,000个单元格样式的限制）：

public void CreateBorder(ISheet sheet, int firstRow, int lastRow, int firstColumn, int lastColumn, BorderStyle borderStyle) { // top line for (int column = firstColumn + 1; column < lastColumn; column++) { ICell topCell = GetCell(sheet, firstRow, column); ICellStyle topStyle = CreateCellStyle(topCell); using (new CellBorderLock(topStyle)) { topStyle.BorderTop = borderStyle; } topCell.CellStyle = topStyle; } // top left corner ICell topLeftCell = GetCell(sheet, firstRow, firstColumn); ICellStyle topLeftStyle = CreateCellStyle(topLeftCell); using (new CellBorderLock(topLeftStyle)) { topLeftStyle.BorderTop = borderStyle; topLeftStyle.BorderLeft = borderStyle; } topLeftCell.CellStyle = topLeftStyle; // top right corner ICell topRightCell = GetCell(sheet, firstRow, lastColumn); ICellStyle topRightStyle = CreateCellStyle(topRightCell); using (new CellBorderLock(topRightStyle)) { topRightStyle.BorderTop = borderStyle; topRightStyle.BorderRight = borderStyle; } topRightCell.CellStyle = topRightStyle; // left line for (int row = firstRow + 1; row < lastRow; row++) { ICell leftCell = GetCell(sheet, row, firstColumn); ICellStyle leftStyle = CreateCellStyle(leftCell); using (new CellBorderLock(leftStyle)) { leftStyle.BorderLeft = borderStyle; } leftCell.CellStyle = leftStyle; } // right line for (int row = firstRow + 1; row < lastRow; row++) { ICell rightCell = GetCell(sheet, row, lastColumn); ICellStyle rightStyle = CreateCellStyle(rightCell); using (new CellBorderLock(rightStyle)) { rightStyle.BorderRight = borderStyle; } rightCell.CellStyle = rightStyle; } // bottom line for (int column = firstColumn + 1; column < lastColumn; column++) { ICell bottomCell = GetCell(sheet, lastRow, column); ICellStyle bottomStyle = CreateCellStyle(bottomCell); using (new CellBorderLock(bottomStyle)) { bottomStyle.BorderBottom = borderStyle; } bottomCell.CellStyle = bottomStyle; } // bottom left corner ICell bottomLeftCell = GetCell(sheet, lastRow, firstColumn); ICellStyle bottomLeftStyle = CreateCellStyle(bottomLeftCell); using (new CellBorderLock(bottomLeftStyle)) { bottomLeftStyle.BorderBottom = borderStyle; bottomLeftStyle.BorderLeft = borderStyle; } bottomLeftCell.CellStyle = bottomLeftStyle; // bottom right corner ICell bottomRightCell = GetCell(sheet, lastRow, lastColumn); ICellStyle bottomRightStyle = CreateCellStyle(bottomRightCell); using (new CellBorderLock(bottomRightStyle)) { bottomRightStyle.BorderBottom = borderStyle; bottomRightStyle.BorderRight = borderStyle; } bottomRightCell.CellStyle = bottomRightStyle; } private ICellStyle CreateCellStyle(ICell cell) { var style = cell.Sheet.Workbook.CreateCellStyle(); style.CloneStyleFrom(cell.CellStyle); return style; } private ICell GetCell(ISheet sheet, int row, int column) { IRow r = sheet.GetRow(row) ?? sheet.CreateRow(row); return r.GetCell(column) ?? r.CreateCell(column); } /// <summary> /// Make a border style of <see cref="ICellStyle"/> unique for duration of a lock /// so it doesn't propagate changes of border to other cell styles. /// </summary> public sealed class CellBorderLock : IDisposable { private readonly ICellStyle style; public CellBorderLock(ICellStyle style) { this.style = style; style.BorderDiagonalLineStyle = BorderStyle.Thin; style.BorderDiagonal = BorderDiagonal.Forward; } public void Dispose() { style.BorderDiagonalLineStyle = BorderStyle.None; style.BorderDiagonal = BorderDiagonal.None; } } 

代码是CC0。