How to refresh a chart without adding new values

Question

0.00/5 (No votes)

See more:

I have a Chart Showing a "Location-Wise Active Employees" Doughnut chart...When I Click a Button The next Company Locations comes up...the problem is when i'm changing the company the chart loads successfully but Adding the Previous Company's Data too...i want to add just only the next company's location-wise data to the chart...I only need to know how to refresh the chart..Sorry for bad english
Thank you!

What I have tried:

I use this code to add data to the chart

VB

Chart1.Series(0).Points.AddXY(Value1,Value2)

Posted 26-Mar-18 19:01pm

Member 13320940

Updated 21-Mar-19 16:01pm

Add a Solution

Comments

lukeer 27-Mar-18 3:02am

Is it in Windows Forms or XAML?
Which chart control do you use?

Member 13320940 27-Mar-18 22:42pm

wndows forms,and ms charts

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

#realJSOP · Answer 1 · 2018-03-27T01:43:00

Solution 1

After the button is clicked, clear the Points collection before adding the new points.

Posted 27-Mar-18 1:43am

#realJSOP

Updated 27-Mar-18 1:44am

v2

Comments

Member 13320940 27-Mar-18 12:00pm

I tried Chart1.Series(0).Points.Clear()...
It didn't work..is there any other way to reset the values?
Anyway im gonna try it again...and i'll let you know

#realJSOP 27-Mar-18 12:48pm

Re-instantiate the Chart.

Member 13320940 27-Mar-18 22:41pm

How do i do that? "Re-Instantiate"?

griswald · Answer 2 · 2019-03-21T16:01:00

I had a similar problem. I wanted to bring in new data and display it in place of the data that was already there. I was replacing the YValue[0] of existing Points. I could see, in the debugger, that the point data was being replaced, but the chart remained the same on the display. I found a Chart.Refresh() in the docs, but it wasn't in .NET 4.6.1. I found the Invalidate function in the object browser for Chart and to my surprise it worked! My code was like this:

C#

chart2.Series[0].Points[ix].YValues[0] = newvalue;
chart2.Invalidate();

I was trying to update the chart as each new data point arrived. However, your case might be different and you can use Chart.Invalidate(); wherever it make the most sense.