So I built myself a simple program to work out the kinks of drawing in my programs. I have a button that I press that when the textbox.text reads 1 it then draws a line of a specific height, color and position, the problem is when I click that button again it will crash informing me that...
"Specified Visual is already a child of another Visual or the root of a CompositionTarget."
[code..]
I know where the problem lies, its with the Canvas1.children.add(line), cause its telling me the line variable is already been used or in use on the canvas, I'm just unsure of how to turn that into a solution that will allow me to click the button a hundred times or more without being forced to MANUALLY make a hundred or more individual variables to store the line.
Finally took the plunge for wpf, all was going well until i needed to do a simple drawing on a canvas control (presume this is the right surface to use). First thing i noticed is that there is no paint event in wpf so i looked at a few others (Initialized, layout updated) at this point i looked under google and found very little on this. would anyone here have or know of a tutorial to allow this functionality? My application (a testbed) will draw an archery target within the canvas along with score numbers in the correct place as follows to do this it will need to draw several filled circles with black (or white) borders and text objects in the correct position. the locations and widths of the circles will be determined using a simple algorithm so my question is on the structure of paint events within wpf, are the commands the same as in gdi+?
I'm trying to make a very simple Silverlight application.I want it to be full-screen, and I want to draw a line onto a Canvas.My problem is that the .Width and .Height of the canvas never seem to have a valid value. The website shows the canvas at 400x300 pixels or so, and when you click on it, it goes into Fullscreen mode.I want to use the Height and Width to find the usable space of the screen. I've tried adding events (thinking that the canvas wasn't yet ready to be used immediate after the full-screen line of code) but the LayoutChanged and Resized events don't seem to yield anything.
how to count the lines in textbox1.text (with multiplelines). I don't need to count each character. I only need to count each line from top to bottom in textbox1.text (multiplelines) and I will use Label1 to display the numbers.
Ok so im looking at this code and it cant possibly be right but im not sure how to do what i want.I have made a list of n points. I now want to click a button on my form and use the picturebox paint event to draw my lines between the points in the list.From what i can see i have at least two issues with this code. 1. Nowhere in this snippet do i reference the picture boxes paint event 2. I do not think that the loop i have is how to navigate through the list of Points to make my drawings.
How do I draw straight lines? I'm working on a tic-tac-toe game and I have no previous experience with graphics in VB 2005. The MSDN doesn't exactly do a good job of explaining it. In QBasic it was very simple, you just did:
[code] With these 3 subs (above) I can track the cursor movement with my window & can draw a horizontal & vertical lines from the location of the cursor. No problems there. Problem is I only want one set of lines ( thus mimiking extended cross hairs) & what I get is persistance. Previous line drawings, cannot be erased out & hence I get a colouring/paint effect in the rectangle. Great if you want that, but I do not want that. How can I negate that effect & draw only 2 lines which follow the cursor location?
I have a problem drawing dotted path lines, with evenly spaced dots: I want to be able to draw evenly spaced dots along a path line using points in an array, My issue is not with drawing the path line, with dotted lines, this is easy, but with the spacing of the dots at the start and end of the path line.
In the example I have created, I create a square with 4 points and draw a dotted path.The path starts at the top left corner and finishes back at the top left corner, the dots are evenly placed along the path, except the final dots at the end of the path. (Sometimes the dots are even and other times they are not even).The shapes I want to draw can be any size and any shape, but I have used a square in this example to show the problem I have.I have also attached two pictures showing the dotted path line, 1 with even spaced dots at the start / End and another showing the problem I want to resolve, with not evenly spaced dots at the start / end.The only difference between the two is the point values.
I'm doing a web application in which the user must make a series of figures such as rectangles, text boxes and lines, Is something like like google docs draw
Problem drawing dotted path lines, with even dots along the path line.I want to draw a path line that can be any shape (square, round, outline etc), and along this path line I want even dots to appear.
I also want to be able to resize the shape (as in the example attached)This is very easy to do using "DrawPath" and defining points for the path and using a pen defined as dots.The problem I have is I want the dots to be evenly placed along the path, on any shape or size I draw.In the example I have created, I create a square with 4 points and draw a dotted path.There are 2 buttons that allows me to resize the square (larger or smaller) this helps show the problem more clearly.
The path starts at the top left corner and finishes back at the top left corner, the dots are evenly placed along the path, except the final dots at the end of the path. (Sometimes the dots are even and other times they are not even).The shapes I want to draw can be any size and any shape, but I have used a square in this example to show the problem I have. point me in the direction I need to go that allows me to draw the dots and give the impression that they are even all along the path, for all shapes and sizes.
In the pictures below if you change the size of the shape, one will have even looking dots, the other will not.
I want to draw a path line that can be any shape (square, round, outline etc), and along this path line I want even dots to appear. I also want to be able to resize the shape (as in the example attached) This is very easy to do using "DrawPath" and defining points for the path and using a pen defined as dots. The problem I have is I want the dots to be evenly placed along the path, on any shape or size I draw.
In the example I have created, I create a square with 4 points and draw a dotted path. There are 2 buttons that allows me to resize the square (larger or smaller) this helps show the problem more clearly. The path starts at the top left corner and finishes back at the top left corner, the dots are evenly placed along the path, except the final dots at the end of the path. (Sometimes the dots are even and other times they are not even).
The shapes I want to draw can be any size and any shape, but I have used a square in this example to show the problem I have. I need to to draw the dots and give the impression that they are even all along the path, for all shapes and sizes. [Code]
I'm basically trying to make a simple, easy-to-use, paint program. I seem to be having problems with using multiple colors in the PictureBox1_Paint option. It draws the graphics but when you change the brush color and click in the picturebox it changes the colors of the previous graphics to the color you are currently trying to use. I need it to allow multiple colors.
Here's the code that I'm currently using..
Imports System.Drawing.Drawing2D Public Class DynosPaint Inherits System.Windows.Forms.Form Private IsFormBeingDragged As Boolean = False
I'm basically trying to make a simple, easy-to-use, paint program. I seem to be having problems with using multiple colors in the PictureBox1_Paint option. It draws the graphics but when you change the brush color and click in the picturebox it changes the colors of the previous graphics to the color you are currently trying to use. I need it to allow multiple colors.
Here's the code that I'm currently using..
Imports System.Drawing.Drawing2D Public Class DynosPaint Inherits System.Windows.Forms.Form
I need to draw a bitmap background with one or more moving bitmaps in the foreground; something like a chessboard where pieces move across it. I use a timer-tick event to redraw the background and then draw the relocated foreground image like the code below. But I get flicker, even though I set the form to use double-buffering. The culprit seems to be redrawing the background to refresh where the foreground images used to be; no flicker if I replace the background DrawImage with a simple Graphics.Clear. I think what I want to do is draw the background, and the foreground bitmap(s), in memory and then render it all. I used to do this with double-buffering, BitBlt, and .Refresh in VB6 but I haven't found the equivalent in VB2010. This must be a pretty common graphics requirement; what's the trick to it?
Dim Gfx As Graphics Me.SetStyle(ControlStyles.AllPaintingInWmPaint Or ControlStyles.UserPaint Or ControlStyles.OptimizedDoubleBuffer, True) Dim rectBrd As Rectangle 'use as clipping region for drawing
I am trying to figure out a way of combining the below Dim statements into one line and maybe also combining Return dblResult into there. currently it is three lines and I have been told that it is possible but kind of lost of how to do it
So i am working on something for school. And we have to make a program that has 2 buttons, 2 text boxes used for input and a label used for output. One button is New Customer wich displays this in the output label (named totalLabel)
Public Class Form1 Private Sub newButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles newButton.Click
I'm creating a button on my project that when clicked it will enter the information in the comment "" area and store it into the clipboard to be pasted.
My issue is whenever I try to put the multiple lines in the comment field I get a syntax issue.[code]....
Is there any SHORCUT for multi lines commenting in vb.net .. Altouhgh i know there is an option in toolbar for multilines comments but i want to know a keyboard shorcut for it...
I have tried multiple variations of the following code, but I still get the same result. I am trying to have the last line "Issue Description: ...." to appear on a new line. I have tried vbCrLf, vbCr, and & Environment.NewLine & _ None of which work.
Just a note: The other emails are properly formatted. Also, if I add put 2 vbCr (s) at the end of the 'Issue Title' line then it looks normal.This one in particular seems to be a thorn in my side.
The result:
The code:
Dim mail As New MailMessage() Dim strbody As String strbody = Nothing
i've got my basic AutoTyper ready (well and one with autoupdating etc in it) but it's only a singular line. [Code] What I want to do it to type multiple lines, I know I'll have to enable multiline on the TextBox. I want it to type one line per time interval using 1 timer. I don't know how but I know it would have to count the lines but from then on I'm stuck. I will need to make it type line 1, then on the next loop line 2 and go on until it's reached the amount of lines from the count then repeat from line 1. [Code]
I'm new to Visual basic (which will be obvious from my question) and am writing program that does various calculations, then displays the results in a list box. the results, however, are all concatenated, end don't each appear on a new line. I tried adding a carriage return/line feed at the end buit the compiler rejected it.
I can't find any examples of creating a list box, and adding multiple entries (one for each time a loop is performed), nor of how to use columns to make the resulting display cosmetically pleasing.
