Excel 无法打开从 c# 生成的

Question

我正在尝试将数据表存储在 excel 中，它是在 c# (SSIS ScriptTask) 中生成的。

下面是我的代码：

        OleDbDataAdapter A = new OleDbDataAdapter();
        System.Data.DataTable dt = new System.Data.DataTable();
        A.Fill(dt, Dts.Variables["User::ObjResultSet"].Value);


         Excel.Application oXL = new Excel.ApplicationClass();
        Excel.Workbooks oWBs = oXL.Workbooks;
        Excel.Workbook oWB = null;
        Excel.Worksheet oSheet;

        oWB = oWBs.Count > 0 ? oWB = oWBs[0] : oWBs.Add(System.Reflection.Missing.Value);



        oXL.DisplayAlerts = false;

        oWB = oXL.Workbooks.Add(Missing.Value);

        oSheet = (Excel.Worksheet)oWB.Worksheets[1];

        int rowCount = 1;
        foreach (DataRow dr in dt.Rows)
        {
            rowCount += 1;
            for (int i = 1; i < dt.Columns.Count + 1; i++)
            {
                // Add the header time first only
                if (rowCount == 2)
                {
                    oSheet.Cells[1, i] = dt.Columns[i - 1].ColumnName;
                }
                oSheet.Cells[rowCount, i] = dr[i - 1].ToString();
            }
        }

        oWB.SaveAs(Dts.Variables["User::ExcelPath"].Value, Excel.XlFileFormat.xlWorkbookNormal,
            Missing.Value, Missing.Value, Missing.Value, Missing.Value,
            Excel.XlSaveAsAccessMode.xlExclusive,
            Missing.Value, Missing.Value, Missing.Value,
            Missing.Value, Missing.Value);
        oWB.Close(false, Dts.Variables["User::ExcelPath"].Value, Missing.Value);
        oWBs.Close();
        oXL.Quit();


        Dts.TaskResult = (int)ScriptResults.Success;

我遇到的问题是，生成了excel。但是当我尝试生成 .xls 时，它完全可以正常工作。但是当我尝试生成 .xlsx 时，这不起作用。

谁能帮帮我？

Answer 1

警告 - 这是没有 SSIS 的纯 C# 尝试。这是我前一段时间使用的一种方法，所以它可能根本没有任何好的实践。如果可能的话，其他人应该改进它，如果他们看到它。这曾经有一个 DataTable 有 2 列。 1 个用于时间戳，1 个用于值。因此，您必须根据需要安装它。

private void createXLSXFromDataTable(System.Data.DataTable table, string path)
        {
            MemoryStream ms = new MemoryStream();
            using (ExcelPackage package = new ExcelPackage())
            {
                ExcelWorksheet worksheet = package.Workbook.Worksheets.Add("data");
                worksheet.Cells["A1"].LoadFromDataTable(table,true);
                worksheet.Column(1).Style.Numberformat.Format = "dd/mm/yyyy\ hh:mm";
                worksheet.Column(1).Style.HorizontalAlignment = ExcelHorizontalAlignment.Right;
                byte[] excelData = package.GetAsByteArray();
                ms.Write(excelData, 0, excelData.Length);
            }
            ms.Flush();
            using (FileStream fs = File.Create(pfad))
            {
                ms.WriteTo(fs);
            }
            //open again with ms office, 
            //so the file will get saved correctly and
            //all columns have the correct format
            Microsoft.Office.Interop.Excel.Application application = new Microsoft.Office.Interop.Excel.Application();
            application.Visible = false;
            Workbooks wbooks = application.Workbooks;
            wbooks.Open(pfad, Origin: XlPlatform.xlWindows);
            Workbook wbook = application.ActiveWorkbook;
            wbook.Save();
            //quitting the services,
            //after that delete/stop COM-connections of each object
            wbook.Close();
            System.Runtime.InteropServices.Marshal.FinalReleaseComObject(wbook);
            wbooks.Close();
            System.Runtime.InteropServices.Marshal.FinalReleaseComObject(wbooks);
            application.Quit();
            System.Runtime.InteropServices.Marshal.FinalReleaseComObject(application);
            MessageBox.Show("Document successfully created.");
        }

可能，您必须再次打开 excel 文件并将其保存在您的代码中。至少那个错误发生在我创建发布代码的时候，所以这就是我在代码中再次打开文件并保存它的原因。

Answer 2

尝试使用 Excel.XlFileFormat.xlOpenXMLWorkbook 而不是 Excel.XlFileFormat.xlWorkbookNormal

[已更新]

oWB.SaveAs(Dts.Variables["User::ExcelPath"].Value, Excel.XlFileFormat.xlOpenXMLWorkbook, Missing.Value, Missing.Value, Missing.Value, Missing.Value,Excel.XlSaveAsAccessMode.xlExclusive, Missing.Value, Missing.Value, Missing.Value,Missing.Value, Missing.Value);

Excel 无法打开从 c# 生成的

Excel not opening generated from c#

c#

excel

ssis

script-task