0

我在 .csv 文件中保存数据时遇到问题。

     void WriteLog(DataRow rzad)
    {
            StreamWriter sw = new StreamWriter("log.csv", true);
            int iColCount = 8;

            for (int i = 0; i < iColCount; i++)
            {
                if (!Convert.IsDBNull(rzad[i]))
                {
                    sw.Write(rzad[i].ToString());
                    sw.Write("\t");
                }
            }
            sw.Write("\n");
            sw.Flush();
            sw.Close();
    }

问题是在文件中我在 A 列中有数据。我想将 DataRow 格式的一行分成 8 个部分，这些部分放在 8 个不同的列中。我的功能正常工作，因为它看不到选项卡（“\ t”）。

我不能发布图片，所以我尝试在 csv 文件中描述结果：

2011-03-17 14:34:11asdPrzekroczono krytyczną minimalną wymaganą wartość parametru5010050080550

这是我的示例行，我想将其粉碎为 8 列：

2011-03-17 14:34:11     asd     Przekroczono krytyczną minimalną wymaganą wartość parametru   50     100    500     80      550

"#\t#" 没有帮助。结果是：

"2011-03-17 18:29:17#   #asd#   #Przekroczono krytyczną, maksymalną, wymaganą wartość parametru#    #560#   #100#   #500#   #80#    #550#   #"

有一些表格，但我的意思是没有空格，而是过渡到下一个单元格:(

"\u0008" 也无济于事。

4

7 回答 7

1

首先，您说您正在写入 CSV（逗号分隔值）文件。但是，您实际上是在写入一个制表符分隔的文件。而且，您需要在行之间写 /r/n ：

这有效：

    StreamWriter sw = new StreamWriter(@"c:\log.csv", true); 
    int iColCount = 8; 
    for (int i = 0; i < iColCount; i++)
    {           
        {
            sw.Write(i.ToString()); 
            sw.Write("\t"); 
        } 
    } 
    sw.Write("\r\n"); 
    sw.Flush(); 
    sw.Close();
于 2011-03-17T21:37:13.457 回答
1 
private ActionResult ExportMeasuresWithTabsFromClient(DataSet spendData,
                                                      string excelFileName,
                                                      bool isFirstColumnDateAndRestDouble = false
                                                      //int numberFormatStartingColumnNumber = -1,
                                                      //int dateFieldColumn = -1)
{
    var fileName = "Bulk Export" + Guid.NewGuid() + ".xlsx";
    // Checking whether the directly exist and save the file to server temp folder
    bool exists = System.IO.Directory.Exists(Server.MapPath("~/" + Resource.ExportLocationTemp));// Common temp location for export as it is not saving the file in the location
    if (!exists)
    {
        DirectoryInfo di = System.IO.Directory.CreateDirectory(Server.MapPath("~/" + Resource.ExportLocationTemp));
        if (di == null || !di.Exists)
        {
            var msg = $"{Resource.MP_CreateDirectory_Failed} '{Resource.ExportLocationTemp}'.";
            _log.Error(msg);
            throw new Exception(msg);
        }
    }

    var fullPath = Path.Combine(Server.MapPath("~/" + Resource.ExportLocationTemp), fileName);
    _log.Info("Entering ExportMeasuresWithTabsFromClient");
    //Write the workbook to a memory stream
    MemoryStream output = new MemoryStream();
    try
    {
        XSSFWorkbook workbook = new XSSFWorkbook();
        foreach (DataTable dt in spendData.Tables)
        {
            if (getOneWorksheet(workbook, dt))  //, isFirstColumnDateAndRestDouble, numberFormatStartingColumnNumber, dateFieldColumn))
                _log.Info($"Created worksheet for TableName: '{dt.TableName}'");
            else
                _log.Error($"Failed to create worksheet for TableName: '{dt.TableName}'");
        }

        using (FileStream file = new FileStream(fullPath, FileMode.Create, FileAccess.Write))
        {
            workbook.Write(file);
        }

        //Return the result to the end user
        //TempData.Add("downloadStatus", 1);
        _log.Info("Exiting ExportMeasuresWithTabsFromClient");



    }
    catch (Exception ex)
    {
        _log.Error(ex.Message, ex);
        _log.Info("Error in ExportMeasuresWithTabsFromClient");
    }
    return Json(fileName);
    //Suggested file name in the "Save as" dialog which will be displayed to the end user
}

private bool getOneWorksheet(XSSFWorkbook workbook,
                             DataTable dataTable,
                             bool isFirstColumnDateAndRestDouble = false)
{
    _log.Info("Entering getOneWorksheet");
    try
    {
        //Create new Excel sheet
        //var sheet = workbook.CreateSheet(getSheetName(dataTable));
        var sheet = workbook.CreateSheet(dataTable.TableName);

        //Create a header row
        var headerRow = sheet.CreateRow(0);

        //(Optional) freeze the header row so it is not scrolled
        sheet.CreateFreezePane(0, 1, 0, 1);

        // Setting for the styles for edited cells
        ICellStyle styleEditableCells = workbook.CreateCellStyle();
        styleEditableCells.IsLocked = false;
        styleEditableCells.WrapText = true;

        // Setting for the styles for non edited cells
        ICellStyle styleForNonEditableCells = workbook.CreateCellStyle();
        styleForNonEditableCells.IsLocked = true;
        styleForNonEditableCells.FillPattern = FillPattern.AltBars;
        styleForNonEditableCells.FillBackgroundColor = NPOI.SS.UserModel.IndexedColors.Grey25Percent.Index;
        styleForNonEditableCells.WrapText = true;
        int rowNumber = 1;
        //Populate the sheet with values from the grid data.
        foreach (DataRow dataRow in dataTable.Rows)
        {
            //Create a new row in Excel sheet.
            var excelRow = sheet.CreateRow(rowNumber++);
            for (int column = 0; column < dataTable.Columns.Count; column++)
            {
                ICell cell = excelRow.CreateCell(column);
                if (isFirstColumnDateAndRestDouble) // if this true --> ROI -> SaveAndDownload button (only for that) 
                {
                    // Protecting the sheet and setting the styles (editing and non editing)
                    sheet.ProtectSheet(Resource.Modeling_Roi_SaveDonwloadexcelPassword);
                    if (column == 0 || column == 1)
                        cell.CellStyle = styleForNonEditableCells;
                    else
                        cell.CellStyle = styleEditableCells;
                }
                //Set values for the cells
                double value;
                if (double.TryParse(dataRow[column].ToString(), out value))
                    cell.SetCellValue(value);
                else
                    cell.SetCellValue(dataRow[column].ToString());
            }
        }
        for (int column = 0; column < dataTable.Columns.Count; column++) // Looping and wraping the column values
        {
            headerRow.CreateCell(column).SetCellValue(dataTable.Columns[column].ColumnName);
            sheet.AutoSizeColumn(column);
            if (sheet.GetColumnWidth(column) / 255 < 254)  /// DDE 1.5 6170 --> Handling the higher exponential value
            {
                sheet.SetColumnWidth(column, sheet.GetColumnWidth(column) + (2 * 256));
            }
        }
        return true;
    }
    catch (Exception ex)
    {
        _log.Error(ex.Message, ex);
        _log.Info("Error in getOneWorksheet");
    }
    return false;
}
于 2021-07-07T13:21:35.840 回答
0

以下函数用于写入 csv 文件。

public static void WriteCSV(string file, string content)
{
   using (StreamWriter sw = new StreamWriter(file))
   {
      sw.Write(content);
   }
}

然后调用这个函数

string appendText = "";
for (int i = 0; i < iColCount; i++)
{
     if (!Convert.IsDBNull(rzad[i]))
     {
         appendText += appendText == "" ? rzad[i].toString() : "," + rzad[i].toString();
     }
}
WriteCSV("C:\\out\\out.csv",appendText);

多行的另一个简单示例，每行由换行符'\n'分隔。

WriteCSV("C:\\out\\out.csv","a,b,c,d,e,f,g\nh,i,j,k,l,m,n\n");
于 2015-04-30T03:31:18.797 回答
0

我倾向于同意@Hossein。我认为这是一个编码问题。我完全按照我的机器上的方式运行了您的代码，并且运行良好。

于 2011-03-17T22:09:37.337 回答
0

Just in case you still haven't found a solution since you wrote this question a year ago:

You can use the KBCSV library which is very popular and handles pretty much everything you require. It uses csv by default but can be easily modified to handle tsv.

For a very simple and easily breakable solution you can try: string.Join("\t", rzad) + "\r\n"

This wouldn't take into account fields that contain tabs. If a field contains a tab, it will make this method useless. Typically fields that would contain the delimiter are double quoted and fields that contain double quotes would be double double quoted.

It's not too difficult to implement this, but it would be reinventing the wheel as it has Kent Boogart has already spent many hours taking into consideration a few of the edge cases that I would not be aware of.

于 2012-11-27T22:15:50.233 回答
0 
if (editLabelsDT != null)
                {
                    var workbook = new XSSFWorkbook();
                    var sheet = workbook.CreateSheet();
                    sheet.ProtectSheet(Resource.Input_ExportEditMeasureLabel);

                    ICellStyle styleEditableCells = workbook.CreateCellStyle();
                    styleEditableCells.IsLocked = false;
                    styleEditableCells.WrapText = true;

                    ICellStyle styleForNonEditableCells = workbook.CreateCellStyle();
                    styleForNonEditableCells.IsLocked = true;
                    styleForNonEditableCells.FillPattern = FillPattern.AltBars;
                    styleForNonEditableCells.FillBackgroundColor = NPOI.SS.UserModel.IndexedColors.Grey25Percent.Index;
                    styleForNonEditableCells.WrapText = true;

                    //Create a header row
                    var headerRow = sheet.CreateRow(0);
                    //(Optional) freeze the header row so it is not scrolled
                    sheet.CreateFreezePane(0, 1, 0, 1);
                    int rowNumber = 1;
                    //Populate the sheet with values from the grid data
                    foreach (DataRow dr in editLabelsDT.Rows)
                    {
                        //Create a new row
                        var row = sheet.CreateRow(rowNumber++);
                        for (int i = 0; i < editLabelsDT.Columns.Count; i++)
                        {
                            ICell cell1 = row.CreateCell(i);
                            if (i == 0)
                                cell1.CellStyle = styleForNonEditableCells;
                            else
                                cell1.CellStyle = styleEditableCells;
                            //Set values for the cells
                            cell1.SetCellValue(dr[i].ToString());
                        }
                    }
于 2021-07-26T13:32:31.177 回答
0 
using (SqlDataAdapter sda = new SqlDataAdapter())
{
    cmd.Connection = con;
    sda.SelectCommand = cmd;
    using (DataTable dt = new DataTable())
    {
        sda.Fill(dt);
        using (XLWorkbook wb = new XLWorkbook())
        {
            wb.Worksheets.Add(dt, "Customers");

            Response.Clear();
            Response.Buffer = true;
            Response.Charset = "";
            Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
            Response.AddHeader("content-disposition", "attachment;filename=SqlExport.xlsx");
            using (MemoryStream MyMemoryStream = new MemoryStream())
            {
                wb.SaveAs(MyMemoryStream);
                MyMemoryStream.WriteTo(Response.OutputStream);
                Response.Flush();
                Response.End();
            }
        }
    }
}
于 2021-07-27T16:00:07.297 回答