We Keep Coding

Interactive chart in C# - set cursor by mouse-click

I'm new to C# and windowsforms applications. I'm trying to create a, at least to some extend, interactive chart. As of now I have not found a library or a built-in method to do what I have in mind.
I want to be able to:
Set a cursor when I click in the chart, set a 2nd cursor when I click again.
When 2 cursors are set, I want to be able to move them with the mouse (click to grab).
(If possible side by side with cursor click-placing:
"Zoom the chart by drawing a rectangle in the chart by clicking and moving the mouse".
My intention is to enable zoom as in: MS Chart Control: prevent zoom when clicking)
I'd like to do this to analyze data (see: Cursor setting example.png). With the cursors it should be possible to easily get the values of the two cursor positions (yellow and red lines) and to measure the distance in between (purple line).
Does anyone of you know how to do this with a mouse_click event OR know a chart library to easily do that?
Thanks for your help!
-Phill

Found another solution to my question and posted it as an answer there: How to retrieve the selected range in the .Net WinForms Chart Control?
To add colored cursors I also add 2 dataseries that are yellow and red to the method private void chart1_SelectionRangeChanging(object sender, CursorEventArgs e):
chart1.Series["CursorX1"].Points.AddXY(x1,y1Min);`
chart1.Series["CursorX1"].Points.AddXY(x1,y1Max);
chart1.Series["CursorX1"].Points.Color = Color.Red;
chart1.Series["CursorX2"].Points.AddXY(x2,y2Min);`
chart1.Series["CursorX2"].Points.AddXY(x2,y2Max);
chart1.Series["CursorX2"].Points.Color = Color.Yellow;

Create a pie chart using values in a text file

I'm making a questionnaire that shows results as charts I have decided to have the questionnaire write the results in an text f file when the user submits and want to read the file in and then assign the values to a pie chart I have all this done apart from the pie chart and am sort of struggling with it and help is greatly appreciated thank you.

The most "vanilla" solution is to draw a image and host it in a PictureBox. But drawing a Pie Chart Image by code is far from easy. It goes a bit to deeply into image drawing for the average programmer.
If you want a simple solution with a prexisting control element, you have to add some 3rd Party Libraries to your setup. The DevExpress and Infographics libraries both have PieChart controls:
https://www.infragistics.com/samples/windows-forms/chart/2d-pie-chart
https://documentation.devexpress.com/WindowsForms/2978/Controls-and-Libraries/Chart-Control/Fundamentals/Series-Views/2D-Series-Views/Pie-and-Donut-Series-Views/Pie-Chart
So you can pick your pioson.

How to display a chart in C# that has no data points?

I'm making a candlestick chart in C# for a bitcoin trading helper. When the form loads, the chart is just an empty white space because there are no data points initially. Is there any way to display the grid lines and the axes when there are no data points? Thank you!
EDIT: A data point is added ~1 minute after loading, so aesthetically I think it would look better to have the empty grid lines and axes than to simply hide the chart altogether.
This is all I've added to the load method:
chart1.Titles.Add("Candlestick Chart");
//chart grid lines colors
chart1.ChartAreas[0].AxisX.MajorGrid.Enabled = false;
chart1.ChartAreas[0].AxisY.MajorGrid.LineColor = Color.Gray;

I think you can add empty point for the Chart series data points
chart3.Series[0].Points.Add();
chart3.Series[0].Points[0].IsEmpty = true;
check this: https://www.syncfusion.com/kb/73/how-do-i-set-emptypoint-for-the-chart-series-data-points

how to plot multiple y-axis in chart control

I am creating a web application using c#. I have four values(or series) volt,current,wh and temperature which I will have to plot in a chart control against time which(time) will be shown in x-axis. All things done correctly. But the range of the values are different like one is in range of more than 1000,another lies between 0 to 10,another shows negetive value,etc. I want to create different y-axis for each series.I had created two y-axis which is a property of series(YAxisType),primary and secondary. Is it possible to create multiple y-axis?I had searched in google but didn't get any proper answer. Please help me.

You can only use 2 y-axis(primary and secondary)
But you can create a few chart areas within one chart control
Or you can add a button that will hide one chart control and show another(with others 2 axis)

how to change the direction of X-axis label in ms charts

Hi I am using Ms chart control in winforms application for displaying values according to dates
I need to change the x-axis label values(Dates) direction horizantal to vertical
I have searched so many properties but i did not find any solution for this.
Any one help me on this problem
Many Thanks ....

As I understand your question - you are asking how to rotate the chart label to display vertically.
You can rotate the x-axis label as follows:
chart1.ChartAreas[0].AxisX.LabelStyle.Angle = -90;
This assumes you have associated your series with the first chart area, which is the default without modification when using the Winforms designer.
The following images shows how the chart would look before the code above is applied, the second image shows how it appears after the code is applied.
Let me know if this is not what you are trying to do and I will post an updated answer.
Before rotation
After Rotation
Edit: Another answer added after my initial post mentions in certain situations it may be important to set chartArea1.AxisX.IsLabelAutoFit = false;

If you have not already done so, get the chart samples from microsoft:
http://archive.msdn.microsoft.com/mschart
Then check the section on Labels
Chart Features > Labels
To answer your question directly, set the angle in LabelStyle, and don't forget to disable autofit
chartArea1.AxisX.IsLabelAutoFit = false;
chartArea1.AxisX.LabelStyle.Angle = 90;