I am drawing a pie chart with some data:
private void DrawFractionChart(Excel.Worksheet activeSheet, Excel.ChartObjects xlCharts, Excel.Range xRange, Excel.Range yRange) { Excel.ChartObject myChart = (Excel.ChartObject)xlCharts.Add(200, 500, 200, 100); Excel.Chart chartPage = myChart.Chart; Excel.SeriesCollection seriesCollection = chartPage.SeriesCollection(); Excel.Series series1 = seriesCollection.NewSeries(); series1.XValues = activeSheet.Range["E1","E3"]; series1.Values = activeSheet.Range["F1","F3"]; chartPage.ApplyDataLabels(Excel.XlDataLabelsType.xlDataLabelsShowPercent, true,true,false,true,true,true,true); chartPage.ChartType = Excel.XlChartType.xlDoughnut; Excel.Axis axis = chartPage.Axes(Excel.XlAxisType.xlValue, Microsoft.Office.Interop.Excel.XlAxisGroup.xlPrimary) as Excel.Axis; }
I just can't figure out how to turn on data labels. I googled everywhere for it but nothing's been helpful so far sadly.
Try this (TRIED AND TESTED)
private void DrawFractionChart(Excel.Worksheet activeSheet, Excel.ChartObjects xlCharts, Excel.Range xRange, Excel.Range yRange) { Excel.ChartObject myChart = (Excel.ChartObject)xlCharts.Add(200, 500, 200, 100); Excel.Chart chartPage = myChart.Chart; Excel.SeriesCollection seriesCollection = chartPage.SeriesCollection(); Excel.Series series1 = seriesCollection.NewSeries(); series1.XValues = activeSheet.Range["E1", "E3"]; series1.Values = activeSheet.Range["F1", "F3"]; chartPage.ChartType = Excel.XlChartType.xlDoughnut; Excel.Axis axis = chartPage.Axes(Excel.XlAxisType.xlValue, Microsoft.Office.Interop.Excel.XlAxisGroup.xlPrimary) as Excel.Axis; series1.ApplyDataLabels(Excel.XlDataLabelsType.xlDataLabelsShowPercent, true, true, false, true, true, true, true); }
One quick question though. If you are not using xRange and yRange then why declare it?
This is the completed code that is tried and tested.
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using Excel = Microsoft.Office.Interop.Excel; namespace WindowsFormsApplication1 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void button1_Click(object sender, EventArgs e) { Microsoft.Office.Interop.Excel.Application xlexcel; Microsoft.Office.Interop.Excel.Workbook xlWorkBook; Microsoft.Office.Interop.Excel.Worksheet xlWorkSheet; object misValue = System.Reflection.Missing.Value; xlexcel = new Excel.Application(); xlexcel.Visible = true; // Add a Workbook xlWorkBook = xlexcel.Workbooks.Add(); // Set Sheet 1 as the sheet you want to work with xlWorkSheet = (Excel.Worksheet)xlWorkBook.Worksheets.get_Item(1); xlWorkSheet.Cells[1, 5] = "Apples"; xlWorkSheet.Cells[2, 5] = "Oranges"; xlWorkSheet.Cells[3, 5] = "Pears"; xlWorkSheet.Cells[1, 6] = "80"; xlWorkSheet.Cells[2, 6] = "65"; xlWorkSheet.Cells[3, 6] = "45"; Excel.ChartObjects myCharts = (Excel.ChartObjects)xlWorkSheet.ChartObjects(Type.Missing); // Specified xlWorkSheet.Cells[3, 6], xlWorkSheet.Cells[3, 6] just for the heck of it. DrawFractionChart(xlWorkSheet, myCharts, xlWorkSheet.Cells[3, 6], xlWorkSheet.Cells[3, 6]); //Once done close and quit Excel //xlWorkBook.Close(true, misValue, misValue); //xlexcel.Quit(); //releaseObject(xlWorkSheet); //releaseObject(xlWorkBook); //releaseObject(xlexcel); } private void DrawFractionChart(Excel.Worksheet activeSheet, Excel.ChartObjects xlCharts, Excel.Range xRange, Excel.Range yRange) { Excel.ChartObject myChart = (Excel.ChartObject)xlCharts.Add(200, 500, 200, 100); Excel.Chart chartPage = myChart.Chart; Excel.SeriesCollection seriesCollection = chartPage.SeriesCollection(); Excel.Series series1 = seriesCollection.NewSeries(); series1.XValues = activeSheet.Range["E1", "E3"]; series1.Values = activeSheet.Range["F1", "F3"]; chartPage.ChartType = Excel.XlChartType.xlDoughnut; Excel.Axis axis = chartPage.Axes(Excel.XlAxisType.xlValue, Microsoft.Office.Interop.Excel.XlAxisGroup.xlPrimary) as Excel.Axis; series1.ApplyDataLabels(Excel.XlDataLabelsType.xlDataLabelsShowPercent, true, true, false, true, true, true, true); } //private void releaseObject(object obj) //{ // try // { // System.Runtime.InteropServices.Marshal.ReleaseComObject(obj); // obj = null; // } // catch (Exception ex) // { // obj = null; // MessageBox.Show("Unable to release the Object " + ex.ToString()); // } // finally // { // GC.Collect(); // } //} } }
SNAPSHOT
#region Export Excel To Chart Excel.Range chartRange; Excel.ChartObjects xlCharts = (Excel.ChartObjects)xlWorkSheet.ChartObjects(Type.Missing); Excel.ChartObject myChart = (Excel.ChartObject)xlCharts.Add(300, 50, 500, 500); Excel.Chart chartPage = myChart.Chart; chartRange = xlWorkSheet.get_Range("A6", "B" + (counter-1)); chartPage.SetSourceData(chartRange, misValue); chartPage.ChartType = Excel.XlChartType.xlPie;// type of chart chartPage.ApplyDataLabels(Excel.XlDataLabelsType.xlDataLabelsShowPercent, Excel.XlDataLabelsType.xlDataLabelsShowLabel, true, false, false, true, false, true);// set label chartPage.Export(@"C:\excel_chart_export.bmp","BMP",misValue ); #endregion
The solution above didn't work for me in VS 2013 and Excel 2013.
Add the following references:
Microsoft.Office.Core Microsoft.Office.Interop.Excel
and use the following method:
Chart oChart = ... oChart.SetElement(Microsoft.Office.Core.MsoChartElementType.msoElementDataLabelOutSideEnd);
Source (MSDN):
https://msdn.microsoft.com/en-us/library/microsoft.office.tools.excel.chart.setelement.aspx https://msdn.microsoft.com/en-us/library/microsoft.office.core.msochartelementtype.aspx
