Question

我花了几个小时试图在我的C＃应用程序中创建Excel中的一些图表。我正在尝试创建多个图表对象。有没有更好的方法呢？我确定行“chartObject [col] =（Excel.Chart）oWB.Charts.Add（Missing.Value，Missing.Value，Missing.Value，Missing.Value）;”是我出错的地方。

目前，当我调用此行时，它有时会创建最后一个图表的副本，但有时它会起作用。我根本无法理解它的逻辑。

由于

private void CreateCharts(Excel.Worksheet oWS, int numRows, int numCols)
    {
        Excel.Workbook oWB = (Excel.Workbook)oWS.Parent;
        Excel.Series oSeries;
        //Excel._Chart chartObject;
        Excel.Chart[] chartObject = new Excel.Chart[numCols];
        Excel.SeriesCollection[] oSeriesCollection = new Excel.SeriesCollection[numCols];
        int length = numRows + 2;
        string colname;

        //then you can assign as much as series you want,
        for (int col = 0; col < numCols; col++)
        {
            //create a new chart
            chartObject[col] = (Excel.Chart)oWB.Charts.Add(Missing.Value, Missing.Value, Missing.Value, Missing.Value);
            chartObject[col].ChartType = Excel.XlChartType.xlLine;
            oSeriesCollection[col] = (Excel.SeriesCollection)chartObject[col].SeriesCollection();

            //add the actual occupancy
            colname = GetExcelColumnName(col * 3 + 1);
            oSeries = oSeriesCollection[col].NewSeries();
            oSeries.Values = oWS.Range[colname + "2", colname + length];

            //add the expected occupancy
            colname = GetExcelColumnName(col * 3 + 2);
            oSeries = oSeriesCollection[col].NewSeries();
            oSeries.Values = oWS.Range[colname + "2", colname + length];
        }
    }

Answer 1

我的问题是Excel中的 Chart 对象实际上是图表工作表，而图表本身是 ChartObject 对象，并且您使用 Shape 它处理它的对象。这里有a link和another one，其中有一些来自this MS link的一些VBA代码显示了一点，请注意，有几种不同的方法可以完成它：

Sub AddChart_Excel()   
  Dim objShape As Shape   

  ' Create a chart and return a Shape object reference.   
  ' The Shape object reference contains the chart.   
  Set objShape = ActiveSheet.Shapes.AddChart(XlChartType.xlColumnStacked100)   

  ' Ensure the Shape object contains a chart. If so,   
  ' set the source data for the chart to the range A1:C3.  
  If objShape.HasChart Then  
    objShape.Chart.SetSourceData Source:=Range("'Sheet1'!$A$1:$C$3")  
  End If  
End Sub

使用c＃创建多个Excel图表对象

1 个答案: