..as a followup, the suggestion to avoid the repaint on click: private void tChart1_Click(object sender, EventArgs e) { tChart1.AutoRepaint = false; this.Text = "Click shouldn't cause a redraw." + DateTime.Now.ToString(); } private void tChart1_MouseUp(object sender, MouseEventArgs e) { tChart1.Aut...

I'll try your fix tonight - I was able to get version of my old Visual Studio 2008 project:
3.5.3498.27368
And the new version is:
4.2025.5.7

And the charts do work significantly differently regarding eventing.

I'll attach a Visual Studio 2008 zip file with demo code and some screenshots.

I'm upgrading a 2008 app that uses TChart extensively. When I draw the chart, it takes about 30 seconds to draw a bunch of custom lines on the canvas, which I do in the BeforeDrawSeries event, so the lines are under the stock prices. In the old 2008 version of the app, clicking on the chart didn't t...

I'll give it a try this weekend. Looks promising.
Thanks for your help Marc!
ja

Marc,
Even though I work in 24-hour spans, some time bands cross Date Boundaries ie 12 hours one day and 12 hours the next day. I'll try it out this weekend and see what happens.
Thanks,
ja

DDT5.jpg Hi Marc, My website, HarmonicLife, figures out people's birth times given important dates in their lives -- ie Rectification. So all of my charts are within one day. Anyone born before 1899, ie historical figures, will run into this issue. Julian's dates are doubles, so if I could use a do...

I have an app that works fine with modern dates. But I tried to run a chart yesterday with dates from 1892 and the Bottom (XValue) Axis doesn't show values in the middle of the XAxis. Only values on the left and right sides of the chart show -- which is weird. I've attached some screenshots and the ...

I figured this out.
In my Solution, I have a website project and some API projects.
The Chart was generated in an API call and displayed on the webpage.
So I should have registered the TChart component in the API, not the website.
Thanks for your help.
ja

I added the license file for TeeChart.Net to my asp.net project and it compiles fine locally - but in Azure the build files with: Error CS0246: The type or namespace name 'EntryAssemblyAttribute' could not be found (are you missing a using directive or an assembly reference?) I know it's probably so...

Figured it out - volumeJA.Marks.Visible = false;
Series.Marks.Visible = false fixed it.
Thanks.
ja

I created an app that makes a chart with a volume series then I writes it out to a file. It works fine in a Winforms test app. But when I move it to an Asp.Net page the chart is printing hundreds of tiny prices all over the chart. I'm not sure how to turn it off. I'm sure I can figure it out eventua...

Nevermind - doyyy -
I just wired up the API Version of TChart to its AfterDraw event handler and did the drawing the same as the WinForms Version and it works -- thanks for your help!

So I tried the code and it works but I'm having trouble writing custom text out to "graphics" object - normally this text is written in the "BeforeDraw" event when using WinForms - but in API style no events are thrown so I thought I could access the "g" graphics object passed in the DrawEvents and ...

Thanks so much!

Hi Fellow TChart Devs, I was curious if there's an example of programmatically generating charts using TChart.Net then saving chart pic to a disk file. In other words to use in an API without WinForms. I searched here and on YouTube and didn't find anything. It would save me a lot of time. Thanks, ja