How to add value to pointf() correctly? On VB.NET

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How do I add a value to PointF()correctly ? like

VB

Dim pts as PointF()

What I have tried:

I have tried this:

VB

pts={New PointF(x,y)}

but I got "System.ArgumentException: Parameter is not valid".

Posted 3-Dec-16 17:56pm

molali

Updated 21-Jun-21 7:05am

v2

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Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) · Answer 1 · 2016-12-03T20:17:00

Solution 1

Try this...

VB

Dim pts As New PointF(X, Y)

Posted 3-Dec-16 20:17pm

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ)

Comments

molali 4-Dec-16 8:40am

It didn't work,It must be an array. I am applying that "pts" on "gfx.Drawlines(Pens.blue, pts)", so it must be "Dim pts As PointF()or Dim pts As Point()"

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 4-Dec-16 22:00pm

I just shared what I got from official doc. If you need an array, then declare like that.

zgj_gis · Answer 2 · 2021-06-21T07:05:00

Solution 3

you can try:
dim pts() as PointF = {}
dim pt as point
pt.x=10
pt.y=20
pts.add(pt)

Posted 21-Jun-21 7:05am

zgj_gis

Comments

CHill60 22-Jun-21 8:22am

Reasons for my downvote (I can't speak for the others)
1. This won't even compile - "'add' is not a member of 'System.Array'."
2. If you fix point 1 you will then get another error "Index was outside the bounds of the array."
3. That is not how arrays should be declared. I suggest you read Arrays - Visual Basic | Microsoft Docs[^]

Dim pt As Point = New Point(10,20)
Dim pts() As PointF = {pt}