C#用Openxml把一个word文件中的表格复制到另外一个word文件，表格中的文本格式和源文件的格式对比发生的变化，怎样才能保持源文件中的格式

要保持源文件中的格式，可以尝试使用以下方法：

1. 使用Openxml SDK打开源文件和目标文件。

2. 使用源文件中表格的样式，创建一个新的表格样式对象。

3. 遍历源文件中的表格，将表格复制到目标文件中。

4. 遍历源文件中的每个单元格，将单元格中的内容复制到目标文件中的单元格中。

5. 对于每个单元格，将它的样式与新表格样式对象中的样式进行比较，然后将目标文件单元格的样式设置为匹配的样式。

6. 保存目标文件。

以下是示例代码：

using DocumentFormat.OpenXml.Packaging;
using DocumentFormat.OpenXml.Wordprocessing;

// 打开源文件和目标文件
using (WordprocessingDocument sourceDoc = WordprocessingDocument.Open("source.docx", false))
using (WordprocessingDocument destDoc = WordprocessingDocument.Open("destination.docx", true))
{
    // 获取源文件中的表格样式
    TableStyle sourceTableStyle = sourceDoc.MainDocumentPart.StyleDefinitionsPart.Styles.Descendants<TableStyle>()
        .FirstOrDefault(s => s.StyleId == "TableGrid");

    // 在目标文件中创建相同的表格样式
    TableStyle destTableStyle = new TableStyle()
    {
        StyleId = "TableGridCopy",
        BasedOn = sourceTableStyle.BasedOn,
        StyleName = new StyleName() { Val = "Table Grid Copy" }
    };

    // 复制源文件中的格式到新表格样式对象中
    foreach (var styleChild in sourceTableStyle.ChildElements)
    {
        destTableStyle.Append(styleChild.CloneNode(true));
    }

    // 将新表格样式添加到目标文件的样式定义部分
    destDoc.MainDocumentPart.StyleDefinitionsPart.Styles.AppendChild(destTableStyle);

    // 遍历源文件中的所有表格
    foreach (var sourceTable in sourceDoc.MainDocumentPart.Document.Descendants<Table>())
    {
        // 在目标文件中创建一个新表格
        Table destTable = new Table();

        // 复制源文件中表格的属性到新表格中
        foreach (var tableChild in sourceTable.ChildElements)
        {
            destTable.Append(tableChild.CloneNode(true));
        }

        // 遍历源文件中的所有单元格
        foreach (var sourceCell in sourceTable.Descendants<TableCell>())
        {
            // 获取单元格中的内容
            string cellText = sourceCell.InnerText;

            // 在目标文件中创建一个新单元格
            TableCell destCell = new TableCell();

            // 复制源文件中单元格的属性到新单元格中
            foreach (var cellChild in sourceCell.ChildElements)
            {
                destCell.Append(cellChild.CloneNode(true));
            }

            // 比较单元格样式，设置目标文件中单元格的样式
            TableCellStyle sourceCellStyle = sourceDoc.MainDocumentPart.StyleDefinitionsPart.Styles.Descendants<TableCellStyle>()
                .FirstOrDefault(s => s.StyleId == sourceCell.TableCellProperties.TableStyleId?.Value && s.StyleIndex == sourceCell.TableCellProperties.StyleIndex?.Value);

            TableCellStyle destCellStyle = destDoc.MainDocumentPart.StyleDefinitionsPart.Styles.Descendants<TableCellStyle>()
                .FirstOrDefault(s => s.StyleId == destTableStyle.StyleId && s.StyleIndex == sourceCellStyle.StyleIndex?.Value);

            if (destCellStyle != null)
            {
                destCell.TableCellProperties = new TableCellProperties()
                {
                    TableCellWidth = sourceCell.TableCellProperties.TableCellWidth.CloneNode(true) as TableCellWidth,
                    TableCellMargin = sourceCell.TableCellProperties.TableCellMargin.CloneNode(true) as TableCellMargin,
                    TableCellBorders = sourceCell.TableCellProperties.TableCellBorders.CloneNode(true) as TableCellBorders,
                    TableCellVerticalAlignment = sourceCell.TableCellProperties.TableCellVerticalAlignment.CloneNode(true) as TableCellVerticalAlignment,
                    TableCellJustification = sourceCell.TableCellProperties.TableCellJustification.CloneNode(true) as TableCellJustification,
                    TableCellShading = sourceCell.TableCellProperties.TableCellShading.CloneNode(true) as TableCellShading,
                    TableCellHideMark = sourceCell.TableCellProperties.TableCellHideMark.CloneNode(true) as TableCellHideMark,
                    TableCellLook = sourceCell.TableCellProperties.TableCellLook.CloneNode(true) as TableCellLook,
                    TableCellFlyAnchor = sourceCell.TableCellProperties.TableCellFlyAnchor.CloneNode(true) as TableCellFlyAnchor,
                    TableCellOverlap = sourceCell.TableCellProperties.TableCellOverlap.CloneNode(true) as TableCellOverlap,
                    TableCellIns = sourceCell.TableCellProperties.TableCellIns.CloneNode(true) as TableCellIns,
                    TableCellDel = sourceCell.TableCellProperties.TableCellDel.CloneNode(true) as TableCellDel,
                    TableCellContentPartStyle = sourceCell.TableCellProperties.TableCellContentPartStyle.CloneNode(true) as TableCellContentPartStyle,
                    TableCellContentPart = sourceCell.TableCellProperties.TableCellContentPart.CloneNode(true) as TableCellContentPart,
                    TableCellVisualStyle = sourceCell.TableCellProperties.TableCellVisualStyle.CloneNode(true) as TableCellVisualStyle,
                    TableCellId = sourceCell.TableCellProperties.TableCellId.CloneNode(true) as TableCellId,
                    TableCellWidthType = sourceCell.TableCellProperties.TableCellWidthType.CloneNode(true) as TableCellWidthType,
                    TableCellFitText = sourceCell.TableCellProperties.TableCellFitText.CloneNode(true) as TableCellFitText,
                    TableCellPreferredWidth = sourceCell.TableCellProperties.TableCellPreferredWidth.CloneNode(true) as TableCellPreferredWidth,
                    TableCellDirection = sourceCell.TableCellProperties.TableCellDirection.CloneNode(true) as TableCellDirection,
                    TableCellGridSpan = sourceCell.TableCellProperties.TableCellGridSpan.CloneNode(true) as TableCellGridSpan,
                    TableCellVerticalMerge = sourceCell.TableCellProperties.TableCellVerticalMerge.CloneNode(true) as TableCellVerticalMerge,
                    TableCellNoWrap = sourceCell.TableCellProperties.TableCellNoWrap.CloneNode(true) as TableCellNoWrap,
                    TableCellRtl = sourceCell.TableCellProperties.TableCellRtl.CloneNode(true) as TableCellRtl,
                    TableCellTcBorders = sourceCell.TableCellProperties.TableCellTcBorders.CloneNode(true) as TableCellTcBorders,
                    TableCellTcMar = sourceCell.TableCellProperties.TableCellTcMar.CloneNode(true) as TableCellTcMar,
                    TableCellTcPr = sourceCell.TableCellProperties.TableCellTcPr.CloneNode(true) as TableCellTcPr,
                    TableCellTcStyle = sourceCell.TableCellProperties.TableCellTcStyle.CloneNode(true) as TableCellTcStyle,
                    TableCellTcW = sourceCell.TableCellProperties.TableCellTcW.CloneNode(true) as TableCellTcW,
                    TableCellTcFitText = sourceCell.TableCellProperties.TableCellTcFitText.CloneNode(true) as TableCellTcFitText,
                    TableCellTcNoWrap = sourceCell.TableCellProperties.TableCellTcNoWrap.CloneNode(true) as TableCellTcNoWrap,
                    TableCellTcBordersNoShading = sourceCell.TableCellProperties.TableCellTcBordersNoShading.CloneNode(true) as TableCellTcBordersNoShading,
                    TableCellTcShd = sourceCell.TableCellProperties.TableCellTcShd.CloneNode(true) as TableCellTcShd,
                    TableCellTcBordersEastAsian = sourceCell.TableCellProperties.TableCellTcBordersEastAsian.CloneNode(true) as TableCellTcBordersEastAsian,
                    TableCellTcBordersComplex = sourceCell.TableCellProperties.TableCellTcBordersComplex.CloneNode(true) as TableCellTcBordersComplex,
                    TableCellTcBordersBidi = sourceCell.TableCellProperties.TableCellTcBordersBidi.CloneNode(true) as TableCellTcBordersBidi,
                    TableCellTcFitTextId = sourceCell.TableCellProperties.TableCellTcFitTextId.CloneNode(true) as TableCellTcFitTextId,
                    TableCellTcVert = sourceCell.TableCellProperties.TableCellTcVert.CloneNode(true) as TableCellTcVert,
                    TableCellTcTextDirection = sourceCell.TableCellProperties.TableCellTcTextDirection.CloneNode(true) as TableCellTcTextDirection,
                    TableCellTcHideMark = sourceCell.TableCellProperties.TableCellTcHideMark.CloneNode(true) as TableCellTcHideMark,
                    TableCellTcSmartTagPr = sourceCell.TableCellProperties.TableCellTcSmartTagPr.CloneNode(true) as TableCellTcSmartTagPr,
                    TableCellTcSmartTagType = sourceCell.TableCellProperties.TableCellTcSmartTagType.CloneNode(true) as TableCellTcSmartTagType,
                    TableCellTcSmartTag = sourceCell.TableCellProperties.TableCellTcSmartTag.CloneNode(true) as TableCellTcSmartTag,
                    TableCellTcAudio = sourceCell.TableCellProperties.TableCellTcAudio.CloneNode(true) as TableCellTcAudio,
                    TableCellTcTrackChange = sourceCell.TableCellProperties.TableCellTcTrackChange.CloneNode(true) as TableCellTcTrackChange,
                    TableCellTcDataBinding = sourceCell.TableCellProperties.TableCellTcDataBinding.CloneNode(true) as TableCellTcDataBinding,
                    TableCellTcResId = sourceCell.TableCellProperties.TableCellTcResId.CloneNode(true) as TableCellTcResId,
                    TableCellTcXML = sourceCell.TableCellProperties.TableCellTcXML.CloneNode(true) as TableCellTcXML,
                    TableCellTcRPr = sourceCellStyle.TableCellProperties.TableCellRPr.CloneNode(true) as TableCellProperties
                };
            }

            // 将单元格的文本添加到目标文件中的单元格中
            destCell.Append(new Paragraph(new Run(new Text(cellText))));

            // 将新单元格添加到目标文件中的表格中
            destTable.Append(destCell);
        }

        // 将新表格添加到目标文件中的文档中
        destDoc.MainDocumentPart.Document.Body.Append(destTable);
    }

    // 保存目标文件
    destDoc.MainDocumentPart.Document.Save();
}

请注意，这只是一个示例代码，并且可能需要进行一些调整以适应您的具体情况。