Refresh Chart Every Second - vb.net

Question

Have a question. I think it must be quite easy to implement but for some reason I can't do it. Right now the charts are updated if I click on them. I wish that they were updated every time I change a value (just like in Excel), for must be easier to implement a timer.
For some reason I can't implement it and I have already tried a few things that I have found online.
I have two charts and I want the charts to update the values every second (or the interval suitable for the program).
I am working on a Windows form and have the following VB code:
Private Sub Chart1_Click(sender As Object, e As EventArgs) Handles Chart1.MouseClick
AutoSize = False
Chart1.ChartAreas(0).AxisX.Interval = 0.05
Chart1.ChartAreas(0).AxisY.Interval = 200
With Chart1
.Series(0).Points.Clear()
.Series(1).Points.Clear()
.Series(2).Points.Clear()
End With
With Chart1
.Series(0).Points.AddXY(TOCGLong, TOSumMassValues)
.Series(1).Points.AddXY(LandCGLong, LandSumMassValues)
.Series(2).Points.AddXY(ZFWCGLong, ZFWSumMassValues)
End With
With Chart1.ChartAreas
With .Max
.AxisX.Maximum = 3.55
.AxisY.Maximum = 2300
End With
With .Min
.AxisX.Minimum = 3.15
.AxisY.Minimum = 1200
End With
End With
Chart1.Series(3).Points.Clear()
For i As Integer = 0 To 5
Chart1.Series(3).Points.AddXY(CGLimitX(i), CGLimitY(i))
Next
End Sub
Private Sub Chart3_Click(sender As Object, e As EventArgs) Handles Chart3.MouseClick
Dim FuelX() As Integer = {80, 90, 100, 110, 120, 130, 140, 150, 160, 170, 180}
Dim ISA() As Double = {27171.16, 24053.39, 21011, 18043.99, 15152.36, 12336.11, 9595.24, 6929.75, 4339.64, 1824.91, -614.44}
Dim ISA20() As Double = {25421.84, 21987.56, 18644, 15409.16, 12277.04, 9247.64, 6320.96, 3497, 775.76, -1842.76, -4358.56}
Dim ISA35() As Double = {23726.04, 19793.81, 16041, 12467.61, 9073.64, 5859.09, 2823.96, -31.75, -2708.04, -5204.91, -7522.36}
AutoSize = False
Chart3.ChartAreas(0).AxisX.Interval = 10
Chart3.ChartAreas(0).AxisY.Interval = 5000
With Chart3
.Series(0).Points.Clear()
'.Series(1).Points.Clear()
'.Series(2).Points.Clear()
End With
With Chart3
.Series(0).Points.AddXY(FuelConsuption, SDaltitude.Value)
For i As Integer = 0 To 10
.Series(1).Points.AddXY(FuelX(i), ISA(i))
.Series(2).Points.AddXY(FuelX(i), ISA20(i))
.Series(3).Points.AddXY(FuelX(i), ISA35(i))
Next
End With
With Chart3.ChartAreas
With .Max
.AxisX.Maximum = 180
.AxisY.Maximum = 23000
End With
With .Min
.AxisX.Minimum = 80
.AxisY.Minimum = 0
End With
End With
End Sub

Answer 1

Take the code out of the Chart1.MouseClick handler and put it in a Sub of its own with a descriptive name. Do the same for the Chart3.MouseClick handler.
In the Chart1.MouseClick handler, call that first Sub.
In the Chart3.MouseClick handler, call that second method.
For the question in the question:
I wish that they were updated everytime I change a value
In the appropriate textbox leave handlers, call the appropriate method(s), something like this:
Private Sub TextBox1_Leave(sender As Object, e As EventArgs) Handles TextBox1.Leave
UpdateChart1()
UpdateChart2()
End Sub
I suggest using the Leave event so that it doesn't keep changing while the user is in the middle of typing.
For the question in the title:
You should put the chart updating code in its own methods, as written above. Then you can easily call it from a timer's tick event. The essential parts of the code are like this:
Public Class Form1
Dim tim As Timer
Sub UpdateMpgChart()
' ... code here to update the chart
End Sub
Sub UpdateOtherChart()
' ... code here to update the other chart
End Sub
Sub TimerTickHandler(sender As Object, e As EventArgs)
UpdateMpgChart()
UpdateOtherChart()
End Sub
Sub InitialiseTimer()
tim = New Timer With {.Interval = 1000}
AddHandler tim.Tick, AddressOf TimerTickHandler
tim.Start()
End Sub
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
InitialiseTimer()
End Sub
Private Sub Form1_FormClosing(sender As Object, e As FormClosingEventArgs) Handles MyBase.FormClosing
If tim IsNot Nothing Then
tim.Dispose()
End If
End Sub
End Class

Answer 2

I wish that they were updated every time I change a value (just like in Excel), for must be easier to implement a timer.
You can use the ReactiveProperty nuget.
You declare a ReactiveProperty for each value you want to "react":
public ReactiveProperty<int> Prop1 = new ReactiveProperty(0);
public ReactiveProperty<int> Prop2 = new ReactiveProperty(0);
In the constructor (or load event) just tell the property to update the chart:
Prop1.Subscribe(value => Chart1_Click(this, null));
Here I'm telling to Prop1 to execute the Chart1_Click method, but you can create an specific method for updating the charts and put this in the subscribe method instead the Chart1_Click.
And for change the Prop1 or Prop2 values just:
Prop1.Value = 5; // this line will run the specified method
Prop2.Value = 10;