c# - 在 OpenXML (excel) 中创建自定义列宽

Question

我是 OpenXML (v. 2.5) 的新手，我可以创建行和单元格，但我需要能够设置列宽，但由于某些原因我无法正确设置。

没有这段代码:

        Columns cols = new Columns();

        Column c1 = new Column()
        {
            CustomWidth = true,
            Width = 20
        };

        cols.Append(c1);
        wspart.Worksheet.Append(cols);

程序正常运行并生成excel文件。

下面的代码符合并运行，但给我留下了一个损坏的 excel 文档。当我尝试添加列时我做错了什么？

    public static void createExcel() //TODO change to private
    {
        //create the spreadsheet document with openxml See https://msdn.microsoft.com/en-us/library/office/ff478153.aspx
        SpreadsheetDocument spreadsheetDoc = SpreadsheetDocument.Create(@"C:\Users\Reid\Documents\BLA\test.xlsx", SpreadsheetDocumentType.Workbook); //TODO change path

        //add a workbook part
        WorkbookPart wbpart = spreadsheetDoc.AddWorkbookPart();
        wbpart.Workbook = new Workbook();

        //add a worksheet part
        WorksheetPart wspart = wbpart.AddNewPart<WorksheetPart>();
        Worksheet ws = new Worksheet(new SheetData());
        wspart.Worksheet = ws;

        //create a new sheets array
        Sheets sheets = spreadsheetDoc.WorkbookPart.Workbook.AppendChild<Sheets>(new Sheets());

        //create a new sheet
        Sheet sheet = new Sheet()
        {
            Id = spreadsheetDoc.WorkbookPart.GetIdOfPart(wspart),
            SheetId = 1,
            Name = "mySheet" //TODO change name
        };

        //add the sheet to the workbook sheet aray
        sheets.Append(sheet);

        SheetData shData = wspart.Worksheet.GetFirstChild<SheetData>();

        //////////////////////////////////row and col widths//////////////////////
        Columns cols = new Columns();

        Column c1 = new Column()
        {
            CustomWidth = true,
            Width = 20
        };

        cols.Append(c1);
        wspart.Worksheet.Append(cols);

        //create the first row
        Row r1 = new Row
        {
            RowIndex = 1,
            CustomHeight = true,
            Height = 71.25 //change height based on info
        };
        shData.Append(r1);
  ////////////////////////cell data/////////////////////////////////

        // In the new row, find the column location to insert a cell in A1.
        Cell refCell = null;
        foreach (Cell cell in r1.Elements<Cell>())
        {
            if (string.Compare(cell.CellReference.Value, "A1", true) > 0)
            {
                refCell = cell;
                break;
            }
        }
        // Add the cell to the cell table at A1.
        Cell newCell = new Cell() {
            CellReference = "A1",
        };
        r1.InsertBefore(newCell, refCell);

        // Set the cell value to be a numeric value of 100.
        newCell.CellValue = new CellValue("100");


        //TODO add in standard things (text that is always the same, headers, logos, etc.)

        //TODO add in dynamic text

        //TODO create and add in barcodes

        //Save and close the document
        wbpart.Workbook.Save();
        spreadsheetDoc.Close();

        //TODO send document to database
    }

Answer 1

上面选择的答案没有解决我的问题，但我终于想通了。对我来说问题是当我调用电话时:Columns columns1=worksheet1.GetFirstChild<Columns>();当前没有 Columns工作表中的子项，因此返回的对象为空，当我尝试将一列附加到 Columns 时出现运行时错误对象。

问题是 Excel 非常挑剔。实际 sheet.xml 文件中的 columns 元素必须位于 sheetdata 元素之前。尝试将我的自定义列附加到工作表导致文件损坏，因为它将列元素放在 sheetdata 元素之后。因为我知道它必须在 sheetdata 元素之前，所以我必须将它插入到工作表的开头而不是将它附加到工作表。这是对我有用的代码:

// Save the stylesheet formats
stylesPart.Stylesheet.Save();

// Create custom widths for columns
Columns lstColumns = worksheetPart.Worksheet.GetFirstChild<Columns>();
Boolean needToInsertColumns = false;
if (lstColumns == null)
{
    lstColumns = new Columns();
    needToInsertColumns = true;
}
// Min = 1, Max = 1 ==> Apply this to column 1 (A)
// Min = 2, Max = 2 ==> Apply this to column 2 (B)
// Width = 25 ==> Set the width to 25
// CustomWidth = true ==> Tell Excel to use the custom width
lstColumns.Append(new Column() { Min = 1, Max = 1, Width = 25, CustomWidth = true });
lstColumns.Append(new Column() { Min = 2, Max = 2, Width = 9, CustomWidth = true });
lstColumns.Append(new Column() { Min = 3, Max = 3, Width = 9, CustomWidth = true });
lstColumns.Append(new Column() { Min = 4, Max = 4, Width = 9, CustomWidth = true });
lstColumns.Append(new Column() { Min = 5, Max = 5, Width = 13, CustomWidth = true });
lstColumns.Append(new Column() { Min = 6, Max = 6, Width = 17, CustomWidth = true });
lstColumns.Append(new Column() { Min = 7, Max = 7, Width = 12, CustomWidth = true });
// Only insert the columns if we had to create a new columns element
if (needToInsertColumns)
    worksheetPart.Worksheet.InsertAt(lstColumns, 0);

// Get the sheetData cells
SheetData sheetData = worksheetPart.Worksheet.GetFirstChild<SheetData>();

希望这对某人有帮助!