exc.Charts.Add(Missing,Missing,1,Missing);
exc.ActiveChart.ChartType=Excel.XlChartType.xlColumnClustered;
exc.ActiveChart.SetSourceData(worksheet.get_Range("A1","B10"),Excel.XlRowCol.xlColumns);
exc.ActiveChart.Location(Excel.XlChartLocation.xlLocationAsObject,"sheet1");
exc.ActiveChart.HasTitle=true;
exc.ActiveChart.ChartTitle.Text="图表名称";
exc.ActiveChart.HasDataTable=false;
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