关于从数据表生成折线图的问题c＃

我正在使用Interop.Excel从数据表中导出数据并生成折线图。 我有一个代码，导出数据从数据表excel，也在那里创build图表，但代码错误在这一行

Excel.Axis yAxis = (Excel.Axis)xlChart.Axes(Excel.XlAxisType.xlSeriesAxis, Excel.XlAxisGroup.xlPrimary); 

和我得到的错误消息价值不在预期范围内

我完整的代码线图生成。

 private void button1_Click(object sender, EventArgs e) { System.Data.DataTable dt = GetGraphData(); Excel.Application xla = new Excel.Application(); xla.Visible = true; Excel.Workbook wb = xla.Workbooks.Add(Excel.XlSheetType.xlWorksheet); Excel.Worksheet ws = (Excel.Worksheet)wb.ActiveSheet; //********************** Now create the chart. ***************************** Excel.ChartObjects chartObjs = (Excel.ChartObjects)ws.ChartObjects(Type.Missing); Excel.ChartObject chartObj = chartObjs.Add(250, 60, 300, 300); Excel.Chart xlChart = chartObj.Chart; int nRows = 2; int nColumns = dt.Rows.Count; string upperLeftCell = "B2"; int endRowNumber = System.Int32.Parse(upperLeftCell.Substring(1)) + nRows - 1; char endColumnLetter = System.Convert.ToChar( Convert.ToInt32(upperLeftCell[0]) + nColumns - 1); string upperRightCell = System.String.Format("{0}{1}", endColumnLetter, System.Int32.Parse(upperLeftCell.Substring(1))); string lowerRightCell = System.String.Format("{0}{1}", endColumnLetter, endRowNumber); Excel.Range rg = ws.get_Range(upperLeftCell, lowerRightCell); for (int i = 1; i <= dt.Rows.Count; i++) { rg[1, i] = dt.Rows[i - 1][0].ToString(); //For Adding Header Text rg[2, i] = int.Parse(dt.Rows[i - 1][1].ToString()); //For Adding Datarow Value } Excel.Range chartRange = ws.get_Range(upperLeftCell, lowerRightCell); xlChart.SetSourceData(chartRange, Type.Missing); xlChart.ChartType = Excel.XlChartType.xlLine; // *******************Customize axes: *********************** Excel.Axis xAxis = (Excel.Axis)xlChart.Axes(Excel.XlAxisType.xlCategory, Excel.XlAxisGroup.xlPrimary); //xAxis.HasTitle = true; // xAxis.AxisTitle.Text = "X Axis"; Excel.Axis yAxis = (Excel.Axis)xlChart.Axes(Excel.XlAxisType.xlSeriesAxis, Excel.XlAxisGroup.xlPrimary); //yAxis.HasTitle = true; //yAxis.AxisTitle.Text = "Y Axis"; Excel.Axis zAxis = (Excel.Axis)xlChart.Axes(Excel.XlAxisType.xlValue, Excel.XlAxisGroup.xlPrimary); //zAxis.HasTitle = true; //zAxis.AxisTitle.Text = "Z Axis"; // *********************Add title: ******************************* xlChart.HasTitle = true; xlChart.ChartTitle.Text = "Project Status Graph"; // *****************Set legend:*************************** xlChart.HasLegend = true; FileStream file = new FileStream(@"c:\pop.xls", FileMode.Create); file.Close(); wb.SaveCopyAs(@"c:\pop.xls"); // ****************For Quiting The Excel Aplication *********************** if (xla != null) { xla.DisplayAlerts = false; wb.Close(); wb = null; xla.Quit(); xla = null; } } private System.Data.DataTable GetGraphData() { System.Data.DataTable dt = new System.Data.DataTable(); dt.Columns.AddRange(new DataColumn[2] { new DataColumn("ProjectStatus"), new DataColumn("per") }); DataRow dr1 = dt.NewRow(); dr1[0] = "Compleet"; dr1[1] = 20; dt.Rows.Add(dr1); DataRow dr2 = dt.NewRow(); dr2[0] = "Pending"; dr2[1] = 20; dt.Rows.Add(dr2); DataRow dr3 = dt.NewRow(); dr3[0] = "UnCompleet"; dr3[1] = 20; dt.Rows.Add(dr3); return dt; } 

寻求帮助。 谢谢

Answer 1

我的同事告诉我，根据intellisense，第一个参数（Excel.XlAxisType.xlSeriesAxis）的值仅适用于3D图表。

你在创build什么样的图表？