添加数据标签以优化饼图

我正在用一些数据绘制一个饼图：

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; } 

我只是不知道如何打开数据标签。 我到处search，但可悲的是没有任何帮助。

Answer 1

试试这个（ 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); } 

一个简单的问题，但。 如果你不使用xRange和yRange那么为什么要声明它？

这是经过testing和完整的代码。

 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(); // } //} } } 

快照

Answer 2

  #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 

Answer 3

上面的解决scheme在VS 2013和Excel 2013中不适用于我。

添加以下参考：

 Microsoft.Office.Core Microsoft.Office.Interop.Excel 

并使用以下方法：

 Chart oChart = ... oChart.SetElement(Microsoft.Office.Core.MsoChartElementType.msoElementDataLabelOutSideEnd); 

来源（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