NPOI 列寬自適應 代碼示例

//列寬自適應，只對英文和數字有效
for (int i = 0; i <= maxColumn; i++)
{
    sheet.AutoSizeColumn(i);
}
//獲取當前列的寬度，然后對比本列的長度，取最大值
for (int columnNum = 0; columnNum <= maxColumn; columnNum++)
{
    int columnWidth = sheet.GetColumnWidth(columnNum) / 256;
    for (int rowNum = 1; rowNum <= sheet.LastRowNum; rowNum++)
    {
        IRow currentRow;
        //當前行未被使用過
        if (sheet.GetRow(rowNum) == null)
        {
            currentRow = sheet.CreateRow(rowNum);
        }
        else 
        {
            currentRow = sheet.GetRow(rowNum);
        }
                            
        if(currentRow.GetCell(columnNum) != null)
        {
            ICell currentCell = currentRow.GetCell(columnNum);
            int length = Encoding.Default.GetBytes(currentCell.ToString()).Length;
            if (columnWidth < length)
            {
                columnWidth = length;
            }
        }
    }
    sheet.SetColumnWidth(columnNum, columnWidth * 256);
}