How do I read data from a spreadsheet using the OpenXML Format SDK?

问题

I need to read data from a single worksheet in an Excel 2007 workbook using the Open XML SDK 2.0. I have spent a lot of time searching for basic guidelines to doing this, but I have only found help on creating spreadsheets.

How do I iterate rows in a worksheet and then iterate the cells in each row, using this SDK?

回答1:

The way I do this is with Linq. There are lots of sample around on this subject from using the SDK to just going with pure Open XML (no SDK). Take a look at:

Office Open XML Formats: Retrieving Excel 2007 Cell Values (uses pure OpenXML, not SDK, but the concepts are really close)
Using LINQ to Query Tables in Excel 2007 (uses Open XML SDK, assumes ListObject)
Reading Data from SpreadsheetML (probably best "overall introduction" article)

回答2:

The other answer seemed more like a meta-answer. I have been struggling with this since using LINQ does work with separated document parts. The following code includes a wrapper function to get the value from a Cell, resolving any possible string lookups.

public void ExcelDocTest()
{
    Debug.WriteLine("Running through sheet.");
    int rowsComplete = 0;

    using (SpreadsheetDocument spreadsheetDocument =
                    SpreadsheetDocument.Open(@"path\to\Spreadsheet.xlsx", false))
    {
        WorkbookPart workBookPart = spreadsheetDocument.WorkbookPart;

        foreach (Sheet s in workBookPart.Workbook.Descendants<Sheet>())
        {
            WorksheetPart wsPart = workBookPart.GetPartById(s.Id) as WorksheetPart;
            Debug.WriteLine("Worksheet {1}:{2} - id({0}) {3}", s.Id, s.SheetId, s.Name,
                wsPart == null ? "NOT FOUND!" : "found.");

            if (wsPart == null)
            {
                continue;
            }

            Row[] rows = wsPart.Worksheet.Descendants<Row>().ToArray();

            //assumes the first row contains column names 
            foreach (Row row in wsPart.Worksheet.Descendants<Row>())
            {
                rowsComplete++;

                bool emptyRow = true;
                List<object> rowData = new List<object>();
                string value;

                foreach (Cell c in row.Elements<Cell>())
                {
                    value = GetCellValue(c);
                    emptyRow = emptyRow && string.IsNullOrWhiteSpace(value);
                    rowData.Add(value);
                }

                Debug.WriteLine("Row {0}: {1}", row,
                    emptyRow ? "EMPTY!" : string.Join(", ", rowData));
            }
        }

    }
    Debug.WriteLine("Done, processed {0} rows.", rowsComplete);
}

public static string GetCellValue(Cell cell)
{
    if (cell == null)
        return null;
    if (cell.DataType == null)
        return cell.InnerText;

    string value = cell.InnerText;
    switch (cell.DataType.Value)
    {
        case CellValues.SharedString:
            // For shared strings, look up the value in the shared strings table.
            // Get worksheet from cell
            OpenXmlElement parent = cell.Parent;
            while (parent.Parent != null && parent.Parent != parent
                    && string.Compare(parent.LocalName, "worksheet", true) != 0)
            {
                parent = parent.Parent;
            }
            if (string.Compare(parent.LocalName, "worksheet", true) != 0)
            {
                throw new Exception("Unable to find parent worksheet.");
            }

            Worksheet ws = parent as Worksheet;
            SpreadsheetDocument ssDoc = ws.WorksheetPart.OpenXmlPackage as SpreadsheetDocument;
            SharedStringTablePart sstPart = ssDoc.WorkbookPart.GetPartsOfType<SharedStringTablePart>().FirstOrDefault();

            // lookup value in shared string table
            if (sstPart != null && sstPart.SharedStringTable != null)
            {
                value = sstPart.SharedStringTable.ElementAt(int.Parse(value)).InnerText;
            }
            break;

        //this case within a case is copied from msdn. 
        case CellValues.Boolean:
            switch (value)
            {
                case "0":
                    value = "FALSE";
                    break;
                default:
                    value = "TRUE";
                    break;
            }
            break;
    }
    return value;
}

Edit: Thanks @Nitin-Jadhav for the correction to GetCellValue().

来源：https://stackoverflow.com/questions/2624333/how-do-i-read-data-from-a-spreadsheet-using-the-openxml-format-sdk

标签

excel

openxml

spreadsheetml