如何使用NPOI库生成折线图和Excel表格中的数据c＃

我必须将数据导出到数据表的excel工作表，还需要在同一工作表中显示一个折线图。 我的问题是我怎么能显示数据和图表在同一张表。

我正在使用NPOI库版本1.2.5.0＆dotnet 2.0我已经设法使用这种方式使用NPOI库从数据表中导出数据到excel。 这里是我的示例代码。

class Program { static void Main(string[] args) { DataTable dt = new DataTable(); dt.Columns.Add("First Name", typeof(string)); dt.Columns.Add("Last Name", typeof(string)); dt.Columns.Add("Salary", typeof(double)); DataRow dr = null; dr = dt.NewRow(); dr[0] = "Konna"; dr[1] = "Lombard"; dr[2] = "3000"; dt.Rows.Add(dr); dr = dt.NewRow(); dr[0] = "Tunip"; dr[1] = "Mansar"; dr[2] = "4000"; dt.Rows.Add(dr); dr = dt.NewRow(); dr[0] = "Dobby"; dr[1] = "Bhell"; dr[2] = "5000"; dt.Rows.Add(dr); Utility.Export(dt, "Result"); } } public static class Utility { public static string GetParentDirectory() { System.IO.DirectoryInfo myDirectory = new DirectoryInfo(Environment.CurrentDirectory); return myDirectory.Parent.Parent.FullName; } public static void Export( DataTable dt,string strSheetName) { try { HSSFWorkbook workbook = new HSSFWorkbook(); HSSFSheet sheet = (HSSFSheet)workbook.CreateSheet(strSheetName); HSSFRow headerRow = (HSSFRow) sheet.CreateRow(0); IFont font = workbook.CreateFont(); font.FontHeightInPoints = 14; font.FontName = "Calibri"; font.Boldweight = (short)NPOI.SS.UserModel.FontBoldWeight.BOLD; ICell titleCell = headerRow.CreateCell(0); titleCell.SetCellValue("Daily Finished Job History " + DateTime.Now.ToString("dd/MM/yyyy")); titleCell.CellStyle = workbook.CreateCellStyle(); titleCell.CellStyle.SetFont(font); sheet.AddMergedRegion(new NPOI.SS.Util.CellRangeAddress(0, 0, 0, dt.Columns.Count)); int rowIndex = 2; HSSFRow dataRow = (HSSFRow)sheet.CreateRow(rowIndex); foreach (DataColumn column in dt.Columns) { font = workbook.CreateFont(); font.FontHeightInPoints = 11; font.FontName = "Calibri"; font.Boldweight = (short)NPOI.SS.UserModel.FontBoldWeight.BOLD; titleCell = dataRow.CreateCell(column.Ordinal); titleCell.SetCellValue(column.ColumnName); titleCell.CellStyle = workbook.CreateCellStyle(); titleCell.CellStyle.SetFont(font); sheet.AutoSizeColumn(column.Ordinal); } rowIndex = 3; foreach (DataRow row in dt.Rows) { dataRow = (HSSFRow)sheet.CreateRow(rowIndex); foreach (DataColumn column in dt.Columns) { font = workbook.CreateFont(); font.FontHeightInPoints = 11; font.FontName = "Calibri"; font.Boldweight = (short)NPOI.SS.UserModel.FontBoldWeight.NORMAL; titleCell = dataRow.CreateCell(column.Ordinal); titleCell.SetCellValue(row[column].ToString()); titleCell.CellStyle = workbook.CreateCellStyle(); titleCell.CellStyle.SetFont(font); sheet.AutoSizeColumn(column.Ordinal); } rowIndex++; } string strParentDirectory = GetParentDirectory(); strParentDirectory = strParentDirectory + "\\Data"; if (!Directory.Exists(strParentDirectory)) { Directory.CreateDirectory(strParentDirectory ); } string strFileName = strParentDirectory + "\\DailyFinishedJobHistory_" + DateTime.Now.ToString("yyyyMMdd")+".xls"; if (File.Exists(strFileName)) { File.Delete(strFileName); } FileStream file = new FileStream(strFileName, FileMode.Create); workbook.Write(file); file.Close(); headerRow = null; sheet = null; workbook = null; } catch (Exception ex) { //MessageBox.Show(ex.Message); } finally { dt.Dispose(); } } } 

现在我的Excel数据看起来像

但我需要生成这种excel文件，其中数据和图表将在同一张表中。 这里是屏幕截图。

Answer 1

LineChart将在NPOI 2.1中得到支持。 它将于2014年6月发布

Answer 2

我认为下面的代码可以帮助你解决问题。

  private void btnRun_Click(object sender, System.EventArgs e) { Workbook workbook = new Workbook(); //Initailize worksheet workbook.CreateEmptySheets(1); Worksheet sheet = workbook.Worksheets[0]; sheet.Name = "Chart data"; sheet.GridLinesVisible = false; //Writes chart data CreateChartData(sheet); //Add a new chart worsheet to workbook Chart chart = sheet.Charts.Add(); if (checkBox1.Checked) { chart.ChartType = ExcelChartType.Line3D; } else { chart.ChartType = ExcelChartType.Line; } //Set region of chart data chart.DataRange = sheet.Range["A1:E5"]; //Set position of chart chart.LeftColumn = 1; chart.TopRow = 6; chart.RightColumn = 11; chart.BottomRow = 29; //Chart title chart.ChartTitle = "Sales market by country"; chart.ChartTitleArea.IsBold = true; chart.ChartTitleArea.Size = 12; chart.PrimaryCategoryAxis.Title = "Month"; chart.PrimaryCategoryAxis.Font.IsBold = true; chart.PrimaryCategoryAxis.TitleArea.IsBold = true; chart.PrimaryValueAxis.Title = "Sales(in Dollars)"; chart.PrimaryValueAxis.HasMajorGridLines = false; chart.PrimaryValueAxis.TitleArea.TextRotationAngle = 90; chart.PrimaryValueAxis.MinValue = 1000; chart.PrimaryValueAxis.TitleArea.IsBold = true; foreach (Charts.ChartSerie cs in chart.Series) { cs.Format.Options.IsVaryColor = true; cs.DataPoints.DefaultDataPoint.DataLabels.HasValue = true; if (!checkBox1.Checked) cs.DataFormat.MarkerStyle = ChartMarkerType.Circle; } chart.PlotArea.Fill.Visible = false; chart.Legend.Position = LegendPositionType.Top; workbook.SaveToFile("Sample.xls"); ExcelDocViewer(workbook.FileName); } private void CreateChartData(Worksheet sheet) { //Country sheet.Range["A1"].Value = "Country"; sheet.Range["A2"].Value = "Cuba"; sheet.Range["A3"].Value = "Mexico"; sheet.Range["A4"].Value = "France"; sheet.Range["A5"].Value = "German"; //Jun sheet.Range["B1"].Value = "Jun"; sheet.Range["B2"].NumberValue = 3300; sheet.Range["B3"].NumberValue = 2300; sheet.Range["B4"].NumberValue = 4500; sheet.Range["B5"].NumberValue = 6700; //Jul sheet.Range["C1"].Value = "Jul"; sheet.Range["C2"].NumberValue = 7500; sheet.Range["C3"].NumberValue = 2900; sheet.Range["C4"].NumberValue = 2300; sheet.Range["C5"].NumberValue = 4200; //Aug sheet.Range["D1"].Value = "Aug"; sheet.Range["D2"].NumberValue = 7700; sheet.Range["D3"].NumberValue = 6900; sheet.Range["D4"].NumberValue = 8400; sheet.Range["D5"].NumberValue = 4200; //Sep sheet.Range["E1"].Value = "Sep"; sheet.Range["E2"].NumberValue = 8000; sheet.Range["E3"].NumberValue = 7200; sheet.Range["E4"].NumberValue = 8100; sheet.Range["E5"].NumberValue = 5600; //Style sheet.Range["A1:E1"].Style.Font.IsBold = true; sheet.Range["A2:E2"].Style.KnownColor = ExcelColors.LightYellow; sheet.Range["A3:E3"].Style.KnownColor = ExcelColors.LightGreen1; sheet.Range["A4:E4"].Style.KnownColor = ExcelColors.LightOrange; sheet.Range["A5:E5"].Style.KnownColor = ExcelColors.LightTurquoise; //Border sheet.Range["A1:E5"].Style.Borders[BordersLineType.EdgeTop].Color = Color.FromArgb(0, 0, 128); sheet.Range["A1:E5"].Style.Borders[BordersLineType.EdgeTop].LineStyle = LineStyleType.Thin; sheet.Range["A1:E5"].Style.Borders[BordersLineType.EdgeBottom].Color = Color.FromArgb(0, 0, 128); sheet.Range["A1:E5"].Style.Borders[BordersLineType.EdgeBottom].LineStyle = LineStyleType.Thin; sheet.Range["A1:E5"].Style.Borders[BordersLineType.EdgeLeft].Color = Color.FromArgb(0, 0, 128); sheet.Range["A1:E5"].Style.Borders[BordersLineType.EdgeLeft].LineStyle = LineStyleType.Thin; sheet.Range["A1:E5"].Style.Borders[BordersLineType.EdgeRight].Color = Color.FromArgb(0, 0, 128); sheet.Range["A1:E5"].Style.Borders[BordersLineType.EdgeRight].LineStyle = LineStyleType.Thin; sheet.Range["B2:D5"].Style.NumberFormat = "\"$\"#,##0"; } 

在使用上面的代码之前，您需要添加Spire.Xls库。