包含合并单元格并带有换行文本的行的自动高度

Question

使用ClosedXML库生成Excel文件时遇到以下问题：包含合并单元格和换行文本的行。

我不能怪罪于库，因为尝试手动执行自动高度设置（双击行分隔符）时也会发生此问题。

Answer 1

我发现此问题的解决方案如下：将工作表的已定义打印区域之外的合并单元格中的数据复制到非合并列中，确保目标列的宽度非常接近合并列的宽度one和然后执行自动拟合。

代码如下：

private Dictionary<int, IList<int>> _RowAutofitBufferToMergedColsMapping = new Dictionary<int, IList<int>>();

// tells the exporter what column to use as a buffer
public void RegisterAutofitMapping(int startCol, int stopCol, int bufferCol)
{
  var mergedCols = Enumerable.Range(startCol, stopCol - startCol + 1).ToList();

   if (_RowAutofitBufferToMergedColsMapping.ContainsKey(bufferCol))
      throw new ArgumentException(String.Format("Current worksheet already contains a mapping for buffer column {0}", bufferCol));

            _RowAutofitBufferToMergedColsMapping[bufferCol] = mergedCols;
            Worksheet.Column(bufferCol).Width = mergedCols.Sum(item => Worksheet.Column(item).Width + ColumnSeparatorWidth);
}

// performs row autofit 
public void RowAutofit(int rowNo, int startCol, int stopCol, bool merge = true)
{
   // finding mapping to use for autofit
   IList<int> vals = Enumerable.Range(startCol, stopCol - startCol + 1).ToList();
   String valsStr = String.Join(",", vals);
   var mappingKey = _RowAutofitBufferToMergedColsMapping.Keys.FirstOrDefault(key => vals.SequenceEqual(_RowAutofitBufferToMergedColsMapping[key]));
   if (mappingKey == 0)
      throw new ArgumentException(String.Format("Could not mapping for provided columns - {0}", valsStr));

   var range = Worksheet.Worksheet.Range(rowNo, startCol, rowNo, stopCol);
   if (merge)
      range.Merge();

    range.Style.Alignment.SetWrapText();

    if (copyStyles)
       ClosedXmlExporter.CopyStyles(this, this, rowNo, startCol, rowNo, mappingKey, CopyStyleOptions.CopyAll());

    var sourceValue = Worksheet.Cell(rowNo, startCol).Value;
    Worksheet.Cell(rowNo, mappingKey)
      .SetValue(sourceValue)
      .Style.Alignment.SetWrapText(true);

      Worksheet.Column(AutofitDummyCol).AdjustToContents(rowNo, rowNo);
}

受Excel提示启发。

Answer 2

private void mergeCellAutoFit(Excel.Range range) //range had value
{
     range.HorizontalAlignment = 7;//format center across Selection
     range.WrapText = true;//set wrap text

     double dRowHeight = Convert.ToDouble(range.RowHeight);//get row heigth now
     range.MergeCells = true; //merge cell
     range.EntireRow.RowHeight = dRowHeight; //perfect row heigth
     range.HorizontalAlignment = 2; //align text left
}