OpenXML SDK 返回 CellValue 的数字而不是单元格文本

Question

我正在使用 Open XML SDK 打开 Excel xlsx 文件，并尝试读取每张工作表中位置 A1 上的单元格值。 我使用以下代码：

using (SpreadsheetDocument spreadsheetDocument = SpreadsheetDocument.Open(openFileDialog1.FileName, false))
{
    var sheets = spreadsheetDocument.WorkbookPart.Workbook.Descendants<Sheet>();

    foreach (Sheet sheet in sheets)
    {
        WorksheetPart worksheetPart = (WorksheetPart)spreadsheetDocument.WorkbookPart.GetPartById(sheet.Id);
        Worksheet worksheet = worksheetPart.Worksheet;

        Cell cell = GetCell(worksheet, "A", 1);

        Console.Writeline(cell.CellValue.Text);
     }
}

private static Cell GetCell(Worksheet worksheet, string columnName, uint rowIndex)
{
     Row row = GetRow(worksheet, rowIndex);

     if (row == null)
         return null;

     return row.Elements<Cell>().Where(c => string.Compare
               (c.CellReference.Value, columnName +
               rowIndex, true) == 0).First();
}

// Given a worksheet and a row index, return the row.
private static Row GetRow(Worksheet worksheet, uint rowIndex)
{
    return worksheet.GetFirstChild<SheetData>().
          Elements<Row>().Where(r => r.RowIndex == rowIndex).First();
} 

位置 A1 的第一个工作表中的文本只是“测试”，但是在我的控制台中，我将值“0”视为 cell.CellValue.Text

有没有人知道获取单元格的正确值？

Answer 1

Excel 工作表中的所有字符串都存储在名为 SharedStringTable 的类似数组的结构中。此表的目标是将所有字符串集中在基于索引的数组中，然后如果该字符串在文档中多次使用，则仅引用此数组中的索引。话虽如此，当您获得 A1 单元格的文本值时收到的 0 是 SharedStringTable 的索引。要获得真正的价值，你可以使用这个辅助函数：

public static SharedStringItem GetSharedStringItemById(WorkbookPart workbookPart, int id)
{
    return workbookPart.SharedStringTablePart.SharedStringTable.Elements<SharedStringItem>().ElementAt(id);
}

然后在你的代码中这样调用它以获得真正的价值：

Cell cell = GetCell(worksheet, "A", 1);

string cellValue = string.Empty;

if (cell.DataType != null)
{
    if (cell.DataType == CellValues.SharedString)
    {
       int id = -1;

       if (Int32.TryParse(cell.InnerText, out id))
       {
           SharedStringItem item = GetSharedStringItemById(workbookPart, id);

           if (item.Text != null)
           {
               cellValue = item.Text.Text;
           }
           else if (item.InnerText != null)
           {
               cellValue = item.InnerText;
           }
           else if (item.InnerXml != null)
           {
               cellValue = item.InnerXml;
           }
       }
    }
}

Answer 2

Amurra 的回答似乎完成了百分之九十，但可能需要一些细微差别。

1) 函数“GetSharedStringItemById”返回一个SharedStringItem，而不是一个字符串，这样调用代码示例将不起作用。要获取字符串的实际值，相信需要询问SharedStringItem的InnerText属性，如下：

public static string GetSharedStringItemById(WorkbookPart workbookPart, int id)
{
    return workbookPart.SharedStringTablePart.SharedStringTable.Elements<SharedStringItem>().ElementAt(id).InnerText;
}

2) 该函数还（正确地）要求将 int 作为其签名的一部分，但示例代码调用提供了一个字符串 cell.CellValue.Text。将字符串转换为 int 很简单，但需要完成，因为编写的代码可能会令人困惑。

Answer 3

很久以前发现这个很有用的sn-p，所以不能指望作者。

private static string GetCellValue(string fileName, string sheetName, string addressName)
    {
        string value = null;

        using(SpreadsheetDocument document =  SpreadsheetDocument.Open(fileName, false))
        {
            WorkbookPart wbPart = document.WorkbookPart;

            // Find the sheet with the supplied name, and then use that Sheet
            // object to retrieve a reference to the appropriate worksheet.
            Sheet theSheet = wbPart.Workbook.Descendants<Sheet>().
              Where(s => s.Name == sheetName).FirstOrDefault();

            if(theSheet == null)
            {
                throw new ArgumentException("sheetName");
            }

            // Retrieve a reference to the worksheet part, and then use its 
            // Worksheet property to get a reference to the cell whose 
            // address matches the address you supplied:
            WorksheetPart wsPart = (WorksheetPart)(wbPart.GetPartById(theSheet.Id));
            Cell theCell = wsPart.Worksheet.Descendants<Cell>().
              Where(c => c.CellReference == addressName).FirstOrDefault();

            // If the cell does not exist, return an empty string:
            if(theCell != null)
            {
                value = theCell.InnerText;

                // If the cell represents a numeric value, you are done. 
                // For dates, this code returns the serialized value that 
                // represents the date. The code handles strings and Booleans
                // individually. For shared strings, the code looks up the 
                // corresponding value in the shared string table. For Booleans, 
                // the code converts the value into the words TRUE or FALSE.
                if(theCell.DataType != null)
                {
                    switch(theCell.DataType.Value)
                    {
                        case CellValues.SharedString:
                            // For shared strings, look up the value in the shared 
                            // strings table.
                            var stringTable = wbPart.
                              GetPartsOfType<SharedStringTablePart>().FirstOrDefault();
                            // If the shared string table is missing, something is 
                            // wrong. Return the index that you found in the cell.
                            // Otherwise, look up the correct text in the table.
                            if(stringTable != null)
                            {
                                value = stringTable.SharedStringTable.
                                  ElementAt(int.Parse(value)).InnerText;
                            }
                            break;

                        case CellValues.Boolean:
                            switch(value)
                            {
                                case "0":
                                    value = "FALSE";
                                    break;
                                default:
                                    value = "TRUE";
                                    break;
                            }
                            break;
                    }
                }
            }
        }
        return value;
    }

Answer 4

我发现this 将整个 excel 数据作为数据表读取的帖子非常有帮助。它还使用 open-xml sdk。

using System;
using System.Data;
using System.Linq;
using DocumentFormat.OpenXml.Packaging;
using DocumentFormat.OpenXml.Spreadsheet;

public static DataTable ReadAsDataTable(string fileName)
{
    DataTable dataTable = new DataTable();
    using (SpreadsheetDocument spreadSheetDocument = SpreadsheetDocument.Open(fileName, false))
    {
        WorkbookPart workbookPart = spreadSheetDocument.WorkbookPart;
        IEnumerable<Sheet> sheets = spreadSheetDocument.WorkbookPart.Workbook.GetFirstChild<Sheets>().Elements<Sheet>();
        string relationshipId = sheets.First().Id.Value;
        WorksheetPart worksheetPart = (WorksheetPart)spreadSheetDocument.WorkbookPart.GetPartById(relationshipId);
        Worksheet workSheet = worksheetPart.Worksheet;
        SheetData sheetData = workSheet.GetFirstChild<SheetData>();
        IEnumerable<Row> rows = sheetData.Descendants<Row>();

        foreach (Cell cell in rows.ElementAt(0))
        {
            dataTable.Columns.Add(GetCellValue(spreadSheetDocument, cell));
        }

        foreach (Row row in rows)
        {
            DataRow dataRow = dataTable.NewRow();
            for (int i = 0; i < row.Descendants<Cell>().Count(); i++)
            {
                dataRow[i] = GetCellValue(spreadSheetDocument, row.Descendants<Cell>().ElementAt(i));
            }

            dataTable.Rows.Add(dataRow);
        }

    }
    dataTable.Rows.RemoveAt(0);

    return dataTable;
}

private static string GetCellValue(SpreadsheetDocument document, Cell cell)
{
    SharedStringTablePart stringTablePart = document.WorkbookPart.SharedStringTablePart;
    string value = cell.CellValue.InnerXml;

    if (cell.DataType != null && cell.DataType.Value == CellValues.SharedString)
    {
        return stringTablePart.SharedStringTable.ChildElements[Int32.Parse(value)].InnerText;
    }
    else
    {
        return value;
    }
}

注意：存在读取 excel 时会忽略每行中的空单元格的问题。因此，当您确定每行中的每个单元格都有一些数据时，此代码最适合。如果您想对其进行适当的处​​理，则可以执行以下操作：

更改for循环的代码：

dataRow[i] = GetCellValue(spreadSheetDocument, row.Descendants<Cell>().ElementAt(i));

到

Cell cell = row.Descendants<Cell>().ElementAt(i);
int actualCellIndex = CellReferenceToIndex(cell);
dataRow[actualCellIndex] = GetCellValue(spreadSheetDocument, cell);

并添加上面修改后的代码sn-p中使用的方法：

private static int CellReferenceToIndex(Cell cell)
{
    int index = 0;
    string reference = cell.CellReference.ToString().ToUpper();
    foreach (char ch in reference)
    {
        if (Char.IsLetter(ch))
        {
            int value = (int)ch - (int)'A';
            index = (index == 0) ? value : ((index + 1) * 26) + value;
        }
        else
            return index;
    }
    return index;
}

我从this 回答中得到了这个修复。

Answer 5

另一种选择：将数据导出到 html 表格并利用样式表指定只读单元格。有关更多信息，请参阅此页面： http://www.c-sharpcorner.com/UploadFile/kaushikborah28/79Nick08302007171404PM/79Nick.aspx