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[英]Trouble creating excel xy scatter plot in c#, specifically assigning X axis values
[英]Set x and y axis on an Excel scatter plot in C#
我在 Excel 表中有这样的数据:
15 0.5 25 0.36
20 0.32 37 0.54
35 0.33 19 0.24
数据由我的代码生成,并且可以通过添加更多系列的方式进行扩展。 我想用 x 和 y 坐标绘制数据的散点图。
using Excel = Microsoft.Office.Interop.Excel;
public void OpenExcel(string folder, string filename)
{
this.folder = folder;
this.filename = filename;
path = folder + @"\" + filename;
if (File.Exists(path) != true) //if the output file does not exists, create it
{
var app = new Microsoft.Office.Interop.Excel.Application();
var temp = app.Workbooks.Add();
temp.SaveAs(path);
temp.Close();
}
wb = excel.Workbooks.Open(path);
}
public void MakeScatterPlot(int numberofseries, int rowlenght) //we already have the data in the sheet at this point
{
Excel.Shape chart_shape = workSheet.Shapes.AddChart(Excel.XlChartType.xlXYScatter, 5, 5, 900, 450);
Excel.Chart chart = chart_shape.Chart;
Excel.Range chart_range = (Excel.Range)workSheet.Range[workSheet.Cells[1, 1], workSheet.Cells[rowlenght, (numberofseries * 2)]].Cells;
chart.SetSourceData(chart_range, Excel.XlRowCol.xlColumns);
for (int i = 1; i <= numberofseries; i++)
{
chart.SeriesCollection(i).XValues = (Excel.Range)workSheet.Range[workSheet.Cells[1, 1 + 2 * (i-1)], workSheet.Cells[rowlenght, 1]].Cells; //1, 3, 5...
chart.SeriesCollection(i).Values = (Excel.Range)workSheet.Range[workSheet.Cells[1, 2 + 2 * (i-1)], workSheet.Cells[rowlenght, 1]].Cells; //2, 4, 6...
}
}
折线chart.SeriesCollection(i).XValues
似乎工作正常,但我收到错误消息,当我尝试设置 y 轴时程序停止我收到错误消息: System.Runtime.InteropServices.COMException: 'Exception from HRESULT: 0x800A03EC'
。 如何设置 y 轴值?
我似乎只是弄乱了列和行:
int xcol = 1 + 2 * (i- 1); //1, 3, 5, 6
int ycol = xcol++; //2, 5, 7
chart.SeriesCollection(currentarm).XValues = (Excel.Range)workSheet.Range[workSheet.Cells[1, xcol], workSheet.Cells[rowlenght, **xcol**]].Cells;
chart.SeriesCollection(currentarm).Values = (Excel.Range)workSheet.Range[workSheet.Cells[1, ycol], workSheet.Cells[rowlenght, **ycol**]].Cells;
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