使用OpenXML向现有Excel文件写入内容

Question

请问我的代码有什么问题？运行时没有报错，但是它无法写入到我的Excel文件中。我只是想将其写入到电子表格的Commercial标签中的A1单元格。

以下是我的代码：

using System;
using System.Data;
using Microsoft.SqlServer.Dts.Runtime;
using System.Windows.Forms;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.IO;
using System.Reflection;
using System.Data.OleDb;
using DocumentFormat.OpenXml;
using DocumentFormat.OpenXml.Packaging;
using DocumentFormat.OpenXml.Spreadsheet;
using System.Xml;
using System.Diagnostics;

namespace Application.Model
{
    [Microsoft.SqlServer.Dts.Tasks.ScriptTask.SSISScriptTaskEntryPointAttribute]
    public class TempCode :         Microsoft.SqlServer.Dts.Tasks.ScriptTask.VSTARTScriptObjectModelBase
    {
        string FilePath;
        string FileName;
        string FileExceptionsPath;
        string FileExceptionsName;
        string Exceptions = "";

    public void Main()
    {
        try
        {
            FilePath = (string)Dts.Variables["FilePath"].Value;
            FileName = (string)Dts.Variables["User::FileName"].Value;
            FileExceptionsPath = (string)Dts.Variables["FileExceptionsPath"].Value;
            FileExceptionsName = (string)Dts.Variables["User::FileExceptionsName"].Value;
            Dts.Variables["User::FileAbsolutePath"].Value = (string)Dts.Variables["FilePath"].Value + (string)Dts.Variables["User::FileName"].Value;
            Dts.Variables["User::FileAbsoluteExceptionsPath"].Value = (string)Dts.Variables["FileExceptionsPath"].Value + (string)Dts.Variables["User::FileExceptionsName"].Value;

            CreateExcel(new Object(), new EventArgs());

            Dts.TaskResult = (int)ScriptResults.Success;
        }
        catch (Exception ex)
        {
            Dts.Events.FireError(0, "File Task", ex.Message, String.Empty, 0);

            Dts.TaskResult = (int)ScriptResults.Failure;
        }
    }

    public void CreateExcel(object sender, EventArgs e)
    {
        Directory.CreateDirectory(FilePath);

        string fileTest = FilePath + FileName;
        if (File.Exists(fileTest))
        {
            File.Delete(fileTest);
        }
        string templateTest = FilePath + "Test.xlsx";

        CopyFile(templateTest, fileTest);

        UpdateCell(fileTest, "120", 1, "A");

        if (Exceptions != "")
        {
            LogExceptions(FileExceptionsPath, FileExceptionsName, Exceptions);
        }
    }

    public void LogExceptions(string FileExceptionsPath, string FileExceptionsName, string data)
    {
        Directory.CreateDirectory(FileExceptionsPath);
        using (var writer = new StreamWriter(FileExceptionsPath + FileExceptionsName))
        {
            List<string> exceptionsList = data.Split('~').ToList();

            foreach (var ex in exceptionsList)
            {
                writer.WriteLine(ex, true);
            }
        }
    }

    private string CopyFile(string source, string dest)
    {
        string result = "Copied file";
        try
        {
            File.Copy(source, dest, true);
        }
        catch (Exception ex)
        {
            result = ex.Message;
        }
        return result;
    }

    public static void UpdateCell(string docName, string text, uint rowIndex, string columnName)
    {
        using (SpreadsheetDocument spreadSheet = SpreadsheetDocument.Open(docName, true))
        {
            WorksheetPart worksheetPart = GetWorksheetPartByName(spreadSheet, "Commercial");
            if (worksheetPart != null)
            {
                Cell cell = GetCell(worksheetPart.Worksheet, columnName, rowIndex);
                cell.CellValue = new CellValue(text);
                cell.DataType = new EnumValue<CellValues>(CellValues.Number);
                worksheetPart.Worksheet.Save();
            }
            spreadSheet.WorkbookPart.Workbook.Save();
        }

    }

    private static WorksheetPart GetWorksheetPartByName(SpreadsheetDocument document, string sheetName)
    {
        IEnumerable<Sheet> sheets = document.WorkbookPart.Workbook.GetFirstChild<Sheets>().
                        Elements<Sheet>().Where(s => s.Name == sheetName);
        if (sheets.Count() == 0)
        {
            return null;
        }
        string relationshipId = sheets.First().Id.Value;
        WorksheetPart worksheetPart = (WorksheetPart)document.WorkbookPart.GetPartById(relationshipId);
        return worksheetPart;
    }


    private static Cell GetCell(Worksheet worksheet, string columnName, uint rowIndex)
    {
        Row row;
        string cellReference = columnName + rowIndex;
        if (worksheet.Elements<Row>().Where(r => r.RowIndex == rowIndex).Count() != 0)
            row = worksheet.GetFirstChild<SheetData>().Elements<Row>().Where(r => r.RowIndex == rowIndex).FirstOrDefault();
        else
        {
            row = new Row() { RowIndex = rowIndex };
            worksheet.Append(row);
        }

        if (row == null)
            return null;

        if (row.Elements<Cell>().Where(c => c.CellReference.Value == cellReference).Count() > 0)
        {
            return row.Elements<Cell>().Where(c => c.CellReference.Value == cellReference).First();
        }
        else
        {
            Cell refCell = null;
            foreach (Cell cell in row.Elements<Cell>())
            {
                if (string.Compare(cell.CellReference.Value, cellReference, true) > 0)
                {
                    refCell = cell;
                    break;
                }
            }
            Cell newCell = new Cell()
            {
                CellReference = cellReference,
                StyleIndex = (UInt32Value)1U

            };
            row.InsertBefore(newCell, refCell);
            worksheet.Save();
            return newCell;
        }
    }

    #region ScriptResults declaration
    /// <summary>
    /// This enum provides a convenient shorthand within the scope of this class for setting the
    /// result of the script.
    /// 
    /// This code was generated automatically.
    /// </summary>
    enum ScriptResults
    {
        Success = Microsoft.SqlServer.Dts.Runtime.DTSExecResult.Success,
        Failure = Microsoft.SqlServer.Dts.Runtime.DTSExecResult.Failure
    };
    #endregion

}

}

- Josh W

---

你调试过了吗？你有信心所有的代码都被执行了吗？你尝试了什么？ - Michael Richardson

Answer 1

问题在于您还没有创建SheetData对象。 以下是您需要执行的操作。

请注意，这仅是展示如何创建该对象的示例，方法“GetCell”应检查工作表和SheetData是否已存在，如果不存在，则创建它们。

public static void UpdateCell(string docName, string text, uint rowIndex, string columnName)
{
    using (SpreadsheetDocument spreadSheet = SpreadsheetDocument.Open(docName, true))
    {
        WorksheetPart worksheetPart = GetWorksheetPartByName(spreadSheet, "Commercial");
        if (worksheetPart != null)
        {
            // Create new Worksheet
            Worksheet worksheet = new Worksheet();
            worksheetPart.Worksheet = worksheet;

            // Create new SheetData
            SheetData sheetData = new SheetData();

            // Create new row
            Row row = new Row(){ RowIndex = rowIndex };

            // Create new cell
            Cell cell = new Cell() { CellReference = columnName + rowIndex, DataType = CellValues.Number, CellValue = new CellValue(text) };

            // Append cell to row
            row.Append(cell);

            // Append row to sheetData
            sheetData.Append(row);

            // Append sheetData to worksheet
            worksheet.Append(sheetData);

            worksheetPart.Worksheet.Save();
        }
        spreadSheet.WorkbookPart.Workbook.Save();
    }

}

- Miguel

---

这是一个实现它的好参考：[链接]（https://msdn.microsoft.com/zh-cn/library/office/cc861607.aspx） - Miguel

“GetWorksheetPartByName” 定义在哪里？ - Jeff Reddy

@JeffReddy是OpenXML库的一个方法链接。 - Miguel