Plotting An Array Of Points On Button Click

May 9, 2011

I have an global array of points that i want to plot in VB. say X and Y points, and typically they have values of +/-12000. Now I've not done graphics work for a long time and when I did, I used OpenGL with C. Now I need a GUI i'm using VB 2008. Firstly, what's the best method of rendering the array of points? should I use some port of OpenGL? GDI? or what?

Secondly, can I simply print to perhaps a Panel on hit of a button? Thirdly, do I have to place any line drwing code in an "OnPaint" event handler? Finally (for now) if my array represents points in a space much larger than the painting surface, how would I scale and scroll the final image within the the proposed Panel? I look forward to your advice.

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May 17, 2012

So I have a 2D array of data, specifically, one "Cv" value for every 10% increment. I have been able to get the Cv's plotted vs % open with the following method:

Private Sub btnPlot_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnPlot.Click
Dim tempString As String

[Code]....

I haven't yet looked into this, but if there's any way to also export this graph as an image into an excel spreadsheet, We will be creating several spec sheets as excel workbooks and we will need to be outputting standardized sheets, which is why I'm trying to make this an application instead of directly implementing the code in Excel with VBA.

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Apr 10, 2009

I need to create an array, but an empty one, which has 3 fields, but unknown number of records.

e.g.

Array(,)

Now, on each button click I want to populate

string1
string2
string3

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How do I go about placing EACH string into that column?

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Oct 2, 2009

I'm trying to create an array of Points but can't seem to get it right.

I can create an array of Integers just fine.

Dim MyArray() as Integer = {1,2,3,4,5}

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Mar 23, 2012

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Mar 2, 2009

I'm trying to generate a list of random points of a 2d array.

ie
(1,0)
(2,1)
(1,2)
(0,0)
(0,1)
....

I need to process each array location, but I would like it to be in a random order.

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how can i inflate an array of points which describe a polygon?

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VS 2010 Using Array Of Points With E.Graphics.DrawLines

Apr 30, 2010

I've rewritten my program so it would be more .net friendly (meaning I try to draw in picturebox.Paint event).

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When I call DrawLines pointing at my array of eg. 10 points and only 5 had been set, I end up with a nice set of lines with the last going to the upper left corner (0,0) and supposedly staying there for 4 more points, which is unacceptable.

I think of using ReDim Preserve each time, but I am not sure if it is the most efficient way to do this.

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Form 1:

private sub Command1_Click()

msgbox "Say Hello"

End Sub[code].....

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my source code in design part is:

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Ok button click is not accessing click event.

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I created a button control ,, by double clicking only the process was going on,,when iam single click the button nothing is to be happenend,,so i want to change into single click insted of double click........here my coding is given below.......

<asp:Button ID="getrec" UseSubmitbehavior ="false" runat="server" Style="left: 30px; position: relative; top: 0px; z-index: 101;"
Text="Get Record" />

[CODE]...

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Mar 23, 2009

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Nov 2, 2009

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Mar 15, 2010

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[Code]...

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I have created a custom control that has a few labels and a button on it. In my main program i dyanmically add this control to a stackpanel. When i add the control i add a few events for it by doing th e following:

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Sub ChangeButtonBorderColor(ByRef ButtonName)
If (Equals(ButtonName.BorderBrush, Brushes.Red)) Then
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[code]....

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