Agregar serie a la excepción del gráfico de Excel

I have an excel file filled with some data. I am trying to open the second sheet and create a chart. The problem is that the Series are giving me either a System.Runtime.InteropServices.COMException was caught or if I un-comment the commented lines a No overload for method 'SeriesCollection' takes '0' arguments. Here is the code that I have:

Microsoft.Office.Interop.Excel.ChartObjects chartObjs = (Microsoft.Office.Interop.Excel.ChartObjects)ws.ChartObjects(Type.Missing);
            Microsoft.Office.Interop.Excel.ChartObject chartObj = chartObjs.Add(100, 20, 300, 300);
            Microsoft.Office.Interop.Excel.Chart xlChart = chartObj.Chart;

            Range rg1 = ws.get_Range("A1", "D" + rowcount);
            rg1.VerticalAlignment = Microsoft.Office.Interop.Excel.XlVAlign.xlVAlignCenter;

            xlChart.SetSourceData(rg1, Microsoft.Office.Interop.Excel.XlRowCol.xlColumns);
            xlChart.ChartType = XlChartType.xlLine;
            xlChart.Legend.Position = XlLegendPosition.xlLegendPositionBottom;

            Axis axis = (Axis)xlChart.Axes(Microsoft.Office.Interop.Excel.XlAxisType.xlValue, Microsoft.Office.Interop.Excel.XlAxisGroup.xlPrimary);

            axis.MaximumScaleIsAuto = false;
            axis.MaximumScale = 3;

            Axis Xaxis = (Axis)xlChart.Axes(Microsoft.Office.Interop.Excel.XlAxisType.xlCategory, Microsoft.Office.Interop.Excel.XlAxisGroup.xlPrimary);
            Xaxis.TickLabels.Orientation = XlTickLabelOrientation.xlTickLabelOrientationDownward;

            //SeriesCollection seriesCollection = (SeriesCollection)xlChart.SeriesCollection();

            Series s1 = (Series)xlChart.SeriesCollection(1);
            s1.Name = "Serie1";
            s1.MarkerStyle = XlMarkerStyle.xlMarkerStyleCircle;


            Series s2 = (Series)xlChart.SeriesCollection(2);
            s2.Name = "Serie2";
            s2.MarkerStyle = XlMarkerStyle.xlMarkerStyleNone;


            Series s3 = (Series)xlChart.SeriesCollection(3);
            s3.Name = "Serie3";
            s3.MarkerStyle = XlMarkerStyle.xlMarkerStyleNone;

If I keep the comments, the error says invalid parameter and is shown on that line: Series s2 = (Series)xlChart.SeriesCollection(2); If I remove the comments, I get the second exception on that line:

SeriesCollection seriesCollection = (SeriesCollection)xlChart.SeriesCollection();

Si agrego 1 as a parameter, then the chart is not displayed properly. Do you have any suggestions how to make it work?

preguntado el 28 de mayo de 14 a las 12:05

2 Respuestas

Argh that stuff still gives me nightmares. There was some weirdness around SeriesCollection - but I cannot remember exactly what it was.

Try to re-include that line //SeriesCollection seriesCollection = (SeriesCollection)xlChart.SeriesCollection(); and refernece the seriesCollection object everywhere. Alos it could be, that the index for SeriesCollection is zero - based, can you try that?

contestado el 28 de mayo de 14 a las 13:05

I've tried to add 0 as parameter, but still the same exception occurs: System.Runtime.InteropServices.COMException, and the chart is therefore not displayed properly. - apostrofijo

I can see that someone has the same problem in the answers of this topic: Unfortunately, it hasn't being resolved. - apostrofijo

Whats the content of the Comexception? is there some clue? Additionally, try to use array indexing [] on the seriesCollection - cristian sauer

Solo dice Invalid Parameter. Can you give an example of the array indexing [] - apostrofijo

I found the problem. When declaring the SeriesCollection, I had to put Type.Missing as an argument. I have marked your solution as the answer. Thank you for the help! - apostrofijo

By Default when you create a new chart it doesn't have any series so you can't select it using chartPage.SeriesCollection(1). You need to create a series first.

In order to add a new series you need to use something like:

SeriesCollection seriesCollection = (SeriesCollection)xlChart.SeriesCollection();

Series s1 = seriesCollection.NewSeries();
s1.Name = "Serie1";
s1.MarkerStyle = XlMarkerStyle.xlMarkerStyleCircle;

Series s2 = seriesCollection.NewSeries();
s2.Name = "Serie2";
s2.MarkerStyle = XlMarkerStyle.xlMarkerStyleNone;

You may also need to add the values to the series rather than to the chart, eg:

Series ser = sc.NewSeries();
ser.XValues = _excelWorksheet.Range[YourRange];
ser.Values = _excelWorksheet.Range[YourRange];

Respondido el 26 de Septiembre de 16 a las 15:09

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