Question

在C#中,以下方案汇编和操作,但在Excel输出档案中没有写任何东西。

我不使用<代码>。开放XmlWriter,但我从记忆中抽出,因此我不得不转向<代码>。开放式XmlWriter ,http://blogs.msdn.com/brian_jones/archive/06/22/even-large-excel-files-with-the-open-xml-sdk.aspx”rel=“nofollow” http://blogs.msdn.com/brian_jones/archive/06/22/even-text--with-the-open-xml-sdk.aspx>。

class Program
{
    static void Main(string[] args)
    {
        File.Copy("book.xlsx", "output.xlsx", true);
        WriteValuesSAX("output.xlsx", 10, 10);
    }

    static void WriteValuesSAX(string filename, int numRows, int numCols)
    {
        using (SpreadsheetDocument myDoc = 
               SpreadsheetDocument.Open(filename, true))
        {
            WorkbookPart workbookPart = myDoc.WorkbookPart;
            WorksheetPart worksheetPart = workbookPart.WorksheetParts.First();

            OpenXmlWriter writer = OpenXmlWriter.Create(worksheetPart);

            Row r = new Row();
            Cell c = new Cell();
            CellValue v = new CellValue("Test");
            c.AppendChild(v);

            writer.WriteStartElement(new SheetData());
            for (int row = 0; row < numRows; row++)
            {
                writer.WriteStartElement(r);
                for (int col = 0; col < numCols; col++)
                {
                    writer.WriteElement(c);
                }
                writer.WriteEndElement();
            }
            writer.WriteEndElement();

            writer.Close();
        }
    }
}

为什么没有写任何产出?

Answer 1

I don t understand this well enough yet, but I got it working. Here s what I ended up with.

class Program
{
    static void Main(string[] args)
    {
        File.Copy("book.xlsx", "output.xlsx", true);
        WriteRandomValuesSAX("output.xlsx", 10, 10);
    }

    static void WriteRandomValuesSAX(string filename, int numRows, int numCols)
    {
        using (SpreadsheetDocument myDoc = SpreadsheetDocument.Open(filename, true))
        {
            WorkbookPart workbookPart = myDoc.WorkbookPart;
            WorksheetPart worksheetPart = workbookPart.WorksheetParts.Last();

            OpenXmlWriter writer = OpenXmlWriter.Create(worksheetPart);

            Row r = new Row();
            Cell c = new Cell();
            CellValue v = new CellValue("Test");
            c.AppendChild(v);

            writer.WriteStartElement(new Worksheet());
            writer.WriteStartElement(new SheetData());
            for (int row = 0; row < numRows; row++)
            {
                writer.WriteStartElement(r);
                for (int col = 0; col < numCols; col++)
                {
                    writer.WriteElement(c);
                }
                writer.WriteEndElement();
            }
            writer.WriteEndElement();
            writer.WriteEndElement();

            writer.Close();
        }
    }
}

通知一添加了<条码>作者:WriteStartElement(New Worksheet);和另一个作家。写作()

我在此发现正确的xml格式:。

......

<?xml version="1.0" encoding="utf-8"?> <x:worksheet xmlns:x="http://schemas.openxmlformats.org/spreadsheetml/2006/main">
    <x:sheetData>
        <x:row r="1">
            <x:c r="A1" t="n">
                <x:v>100</x:v>
            </x:c>
        </x:row>
    </x:sheetData> </x:worksheet>

So I opened (unzipped) the xlsx file and navigated to output.xlsxxlworksheetssheet1.xml and saw that I was missing the <x:worksheet>.

Answer 2

Using the code above gives me the error message "Excel found unreadable content" in Excel 2007. Using information from here how-to-properly-use-openxmlwriter-to-write-large-excel-files and changing the code when adding the columns to the following removed the error.

for(int col = 0; col < numCols; col++)
{
    var oxa = new List<OpenXmlAttribute>();
    oxa.Add(new OpenXmlAttribute("t",null,"str"));
    writer.WriteStartElement(c,oxa);
    writer.WriteElement(new CellValue(string.Format("R{0}C{1}", row, col)));
    writer.WriteEndElement();
}

友情链接