Using windows forms charts in Blazor server app - winforms

Question

I started a new Blazor Server App .Net Core 3.1 and wanted to re-use some old code from
my previous WindowsForms App which generates PDF file with stacked chart.
Most of the code runs ok until it hit the AddChartV2() function:
using System.Windows.Forms.DataVisualization.Charting;
private void AddChartV2()
{
DateTime startDate = StartDate;
DateTime endDate = EndDate;
//Energy
decimal SharpEnergyStart = TenantTouData.AsEnumerable().
Where(p => p.Field<DateTime>("Date") == startDate).
Select(p => p.Field<decimal>("Sharp")).FirstOrDefault();
decimal SharpEnergyEnd = TenantTouData.AsEnumerable().
Where(p => p.Field<DateTime>("Date") == endDate).
Select(p => p.Field<decimal>("Sharp")).FirstOrDefault();
decimal PeakEnergyStart = TenantTouData.AsEnumerable().
Where(p => p.Field<DateTime>("Date") == startDate).
Select(p => p.Field<decimal>("Peak")).FirstOrDefault();
decimal PeakEnergyEnd = TenantTouData.AsEnumerable().
Where(p => p.Field<DateTime>("Date") == endDate).
Select(p => p.Field<decimal>("Peak")).FirstOrDefault();
decimal ValleyEnergyStart = TenantTouData.AsEnumerable().
Where(p => p.Field<DateTime>("Date") == startDate).
Select(p => p.Field<decimal>("Valley")).FirstOrDefault();
decimal ValleyEnergyEnd = TenantTouData.AsEnumerable().
Where(p => p.Field<DateTime>("Date") == endDate).
Select(p => p.Field<decimal>("Valley")).FirstOrDefault();
//Create new chart
var chartimage = new MemoryStream();
var PCF = new RegularTimeOverUsegeChart();
PCF.RegularTOU_crt.Series["Sharp"].Points.AddXY(startDate.ToString("MMM"), SharpEnergyEnd - SharpEnergyStart);
PCF.RegularTOU_crt.Series["Sharp"].Points[0].Color = Color.Red;
PCF.RegularTOU_crt.Series["Peak"].Points.AddXY(startDate.ToString("MMM"), PeakEnergyEnd - PeakEnergyStart);
PCF.RegularTOU_crt.Series["Peak"].Points[0].Color = Color.Gold;
PCF.RegularTOU_crt.Series["Valley"].Points.AddXY(startDate.ToString("MMM"), ValleyEnergyEnd - ValleyEnergyStart);
PCF.RegularTOU_crt.Series["Valley"].Points[0].Color = Color.Green;
PCF.RegularTOU_crt.ChartAreas["ChartArea1"].AxisX.Interval = 1;
for (int i = 1; i < 13; i++)
{
DataTable PreviousReadings = new DataTable();
startDate = startDate.AddMonths(-1);
endDate = endDate.AddMonths(-1);
startDate = new DateTime(startDate.Year, startDate.Month, 1);
endDate = new DateTime(endDate.Year, endDate.Month, 1);
decimal TotalSharp = 0, TotalPeak = 0, TotalValley = 0;
PreviousReadings = Database.GetMySQLTable("SELECT * FROM " + ClientNumber + ".`" + TanentNumber + "` where Date='" + startDate.ToString("yyyy-MM-dd HH:mm:ss") + "' OR Date='" + endDate.ToString("yyyy-MM-dd HH:mm:ss") + "';");
if (PreviousReadings.Rows.Count == 2)
{
TotalSharp = (decimal)PreviousReadings.Rows[1]["Sharp"] - (decimal)PreviousReadings.Rows[0]["Sharp"];
TotalPeak = (decimal)PreviousReadings.Rows[1]["Peak"] - (decimal)PreviousReadings.Rows[0]["Peak"];
TotalValley = (decimal)PreviousReadings.Rows[1]["Valley"] - (decimal)PreviousReadings.Rows[0]["Valley"];
}
PCF.RegularTOU_crt.Series["Sharp"].Points.AddXY(startDate.ToString("MMM"), TotalSharp);
PCF.RegularTOU_crt.Series["Sharp"].Points[i].Color = Color.Red;
PCF.RegularTOU_crt.Series["Peak"].Points.AddXY(startDate.ToString("MMM"), TotalPeak);
PCF.RegularTOU_crt.Series["Peak"].Points[i].Color = Color.Gold;
PCF.RegularTOU_crt.Series["Valley"].Points.AddXY(startDate.ToString("MMM"), TotalValley);
PCF.RegularTOU_crt.Series["Valley"].Points[i].Color = Color.Green;
}
PCF.RegularTOU_crt.SaveImage(chartimage, ChartImageFormat.Tiff);
iTextSharp.text.Image Chart_image = iTextSharp.text.Image.GetInstance(chartimage.GetBuffer());
Chart_image.ScalePercent(45f); //Rescale image by %
Chart_image.SetAbsolutePosition(10f, 10f); // Set image bottom left
ElecBill.Add(Chart_image);
}
I coudn't even debug it line by line, the moment the code reaches this method I get the following:
System.IO.FileNotFoundException: 'Could not load file or assembly 'System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'. The system cannot find the file specified.'
I don't understand what can I do to fix this, the original desktop app is running ok with the same code, this happens only when I trigger the code form the new Blazor app, any thoughts ?

Answer 1

Many thanks to Guy at Mercator, after referencing this package
87.98.252.207/System.Windows.Forms.DataVisualization.zip
The code was able to complete all the methods I use, although I have
to manually set all chart parameters which previously I got from the Windows Forms Chart component...