Finding A Color From Inside Rectangle
Sep 25, 2010
I know how to get a Color (Pixel) from a location
im BMP As New Drawing.Bitmap(1, 1)
Dim GFX As System.Drawing.Graphics = System.Drawing.Graphics.FromImage(BMP)
GFX.CopyFromScreen(New Drawing.Point(MousePosition.X, MousePosition.Y), _
New Drawing.Point(0, 0), BMP.Size)
Dim Pixel As Drawing.Color = BMP.GetPixel(0, 0)
Me.BackColor = Pixel
What I need assistance in is, I am going to create a form. and i wanted to know if there is a way. to Check (not using the mousex and mousey positions) for example. a Rectangle Sized Location to see if anywhere in the back red appears and if red does appear To give an error.
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Jul 26, 2009
I'M creating a kind of photo viewer, and I cannot figure out how to orient the scroll buttons with the photos I want to draw because they all are different sizes.This is really hard to explain so please ask questions if you don't understand.I'M thinking if i could draw every photo on a single rectangle and then the scroll bars will position that rectangle up or down. but is there a way to make a rectangle inside another one so it only shows inside that rectangle?
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Sep 8, 2009
OK, so I just started this VB programming class at school. But I don't understand much because the teacher doesn't really teach us. He just types everything on the projector and expects us to keep up. We have this project in which we are supposed to build a form that accepts the length and width of a rectangle, and calculates the area and perimeter of the rectangle. CAN SOMEBODY PLEASE HELP ME?? I really have no clue how to do this, and more than half the other people in our class don't either, so finding help within the class is pretty much out of the question.
The user enters values for the length and width of a rectangle and clicks the Calculate button or presses the Enter key to activate that button. The application then displays the area and perimeter of the rectangle in the third and fourth labels on the right side of the form.
Specifications The formula for calculating the area is width * length. The formula for calculating the perimeter is 2 * width + 2 * length. The application should accept fractional decimal entries like 10.5 and 20.65. Assume that the user will enter valid numeric data for the length and width.
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Oct 27, 2011
I have a DataList inside another DataList. I want to access the child DataList "dlQuestion" events, ItemDataBound event. Also, I'm tring to find the control LableControl "lblQuestion" in the child datalist. How do I do that? Here's the mark-up:
<asp:DataList ID="dlSection" runat="server" Width="100%">
<ItemTemplate>
<div>
[code].....
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Jan 2, 2010
How to draw a rectangle inside an ellipse at runtime?
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Jun 24, 2011
I'm writing a .NET program for an engineering company. Their specification is to find the number of holes (either of same or different radius) on a rectangular plate and then to find the area of the rectangle and also area of the circle inside that rectangle. It's not essential that the circle touches the rectangle.
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Mar 27, 2012
I draw text (comment on item in an invoice ) inside a rectangle.
[Code]...
I have no problem, the text appear on several lines and it is well wrapped. But if the text is too long to be drawn inside the rectangle, I need to draw the text not drawn in another rectangle (on another page). How can I know the text not drawn in the first rectangle ? I think it is more difficult to use MeasureString because the text is wrapped.
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Mar 17, 2011
I want to draw a rectangle on image where color pixel of image is black
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Jan 2, 2010
How to draw a rectangle inside an ellipse by mouse events like mousedown,up,move
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Mar 2, 2012
ive search on the net on tab control in vb winforms but no luck. It is possible to change the color of the "rectangle part" at the topmost of the ab pages in tab control ? I have 5 tab pages and i want the tab pages small rectangle at the upper part.[code]Is this possible guys using only the properties on the tab pages? I dont need a very long codes which i don't understand in the first place.
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Aug 8, 2011
Im trying to find a tag inside of a tag, so far ive gotten this, but i have no idea how to find another tag inside.There are multiple li tags with data inside so once it find the li tag that equals "a username" i want to click the button tag under it.
If (WebBrowser1.Document IsNot Nothing) Then
Dim Elems As HtmlElementCollection
Dim WebOC As WebBrowser = WebBrowser1
[code]....
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Feb 9, 2011
I'm making a game for a school project We've created a character that moves around the screen and creates blocks behind him as he moves around.We want to make it so that when the character moves from one edge of the screen to another, it fills the screen. So in order to do this we have a Points array that stores every point the character touches on his way to a wall.We then fill the Points array with "formsurface.fillPolygon(Points)"Now I'm wondering is there anyway we can retrieve all the points that are WITHIN or INSIDE the Points array we made? ( remember the points array simply contains the outline or the path the character created, we're filling inside that outline)
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Nov 8, 2010
I have tried this but it does not work:
[Code]...
What is the solution?
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Dec 2, 2011
I'm finding a dropdown in an ascxcontrol on my aspx in the following way.
Dim cp As ContentPlaceHolder = DirectCast(Page.Form.FindControl("ContentPlaceHolder1"), ContentPlaceHolder)
Dim ascx As UserControl = DirectCast(cp.FindControl("drpType"), UserControl)
Dim drpType As DropDownList = DirectCast(ascx.FindControl("drpType"), DropDownList)
Is there a faster way without having to acces all the elements on the page?
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Nov 14, 2011
I am working on arrays and I am currently having trouble with searching and finding arrays. In this example, the user should be able to enter a Name, and it will output that person's stats.
Here is the text file (note, I should be able to go to this text file, add a few more names and the code should still work, which is why I am using loops,arrays,text files instead of if and else statements),
Kobe,29,6,4
Allen Iverson,28,7,4
Jason Kidd,12,10,9
So if the user enters Jason Kidd in the text box, this will display in another text box:
Jason Kidd averaged 12 points, 10 assist, and 9 rebounds.
[Code]...
All right now is the searching part. I really do know how to search for what the user entered and display the statement in a text box. I kind of have an idea of how to just get the name, but for it to get the name and then all the data for that name puzzles me even more.-I tried using .contain, indexof and few others.
I know to display the information in the text box will be something like:
textboxoutput.text = PlayerName & " averaged " & PlayerPoints & " points, " & PlayerAssist &" assist, and " PlayerRebounds " &" rebounds"
So basically, I want it to where the user can enter a basketball players name and display the values for that name.
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Feb 20, 2009
I wanted to make a flow chart with more than 50 labels (see this link for just a small portion of the flow chart [URL]). I looked all around but couldn't find one in VB 2008 with the same problem. but anyway, my questions are:
1. Is there a way to set the color of all the labels instead of just one by one say:
Label1.BackColor = Color.FromKnownColor(KnownColor.Control)
Label2.BackColor = Color.FromKnownColor(KnownColor.Control)
Label3.BackColor = Color.FromKnownColor(KnownColor.Control)
...
...
...
There should be a way to loop through them
2. Is there a way for search through the Labels and find for example Label14? or a label with tagindex of 14? I rather be able to find label 14 but the tag also works.
3. Is there a better way to represent flow charts and stuffs like that in VB 2008?
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Aug 21, 2009
when i copy code from vb.net code window, and paste it in my richtextbox, the color synthax is as it displays in my vb.net code window.. this i want to keep when finding and replacing words. i have the following code to find and replace,
RichTextBox1.Text = RichTextBox1.Text.Replace("Private Sub", "<font color=blue>Private Sub</font>")
but the color syntax of the richtextbox code is lost, looks like a textbox's text.. how do i replace the words and keep the synthax coloring?
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Dec 4, 2011
I have a rectangle with drawings inside it. I want to draw something else on top, but later restore the original insides without necessarily know what they were.
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Jul 26, 2010
i've got a little problem with List(on T) variables.
[code]...
It works perfectly fine. Does anyone know what the problem is?
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Feb 22, 2010
Given a rectangle of width w and height h. and a coordinate x,y in that rectangle I would like to identify which triangle I am within.
i.e. the function should take parameters(x,y) and return a,b,c,d or a zero based number representing that triangle index i.e. (0=A,1=B,2=C,3=D) if they are in that order.
I think this would be something like >= the formula of the red line and >= the formula of the green line?
I'd like to implement this in VB.NET
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Sep 26, 2010
im searching on how to change labels text color inside the code depending on my needs , for example my label's text is set to = "hello world" , can i change hello's world color to x and world's color to y?
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Dec 3, 2011
This code is to draw rectangle. How can I draw rectangle divided to four rectangle or more
e.Graphics.DrawRectangle(Pens.Coral, 50, 200, 30, 40)
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Jul 17, 2011
how to change the color of a text inside a " " on a richtextbox in vb.net I am creating a simple editor and I want it to be a color coding text. I want to color the text that are inside the " ".
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Sep 5, 2010
So, I have a textbox with the following text.
Code:
TITLE"Hello there"
blah blah blah etc...
I want my program to find the TITLE text, and then put the text in the double quotations in a variable.
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Apr 30, 2012
I am making an invoicing application. I have a label (lblCost) inside of a UserControl (InvoiceEntry) inside of a FlowLayoutPanel (pnlEntries). InvoiceEntry represents a line item on the invoice, and pnlEntries is the "body" of the invoice. pnlEntries can hold several InvoiceEntry controls.
I am attempting to sum all of the lblCost values from each InvoiceEntry control to make a subtotal, and I want that subtotal to change automatically if costs are changed (e.g., a change in quantities being ordered). Is there a way to handle when the lblCost.Text property of any of the InvoiceEntry controls contained within pnlEntries changes?
InvoiceAdd.vb:
' Instantiate objects of the various database interaction classes.
Private mCustomer As New Customers
Private mItem As New Items
[code]....
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Mar 30, 2010
im new to coding (started coding last month) so im a little stuck on how to do this, im making some emulation programs to learn coding with, and a part of it is to point the app to a .iso/.bin file and scan the data inside of the iso/bin to check if a file exists.[code]My issue is i cant find any class examples, or any information etc on how to code it so my application can see the data inside of the iso/bin instead of just see'ing the iso/bin file, so that i can then check the data inside the iso to see if the file exists etc.Im a novice still at coding so making a new class myself to look inside the iso/bin is to complex for me.
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May 9, 2011
How to change a forms background system color schemes to windows default color schemes in vb.net?
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Feb 15, 2012
I have a question of VB event handler and color picker. Now I have a label, and I want when user click it, it pops up a color picker dialog and let user to change the background color of the label. Not sure how to implement this, can anyone give me a direction?
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Mar 3, 2010
Alright inside of a combo box I have a list of colors and I want to change the background color of the combo box to the selected color...basically this... but im not sure what the problem is here anyone have some advice or is this not possible?
CBLinerColor.BackColor() = CBLinerColor.Items.Item(0)
Basically i want dynamic code that will change the color depending on the items in the box.
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Jun 19, 2009
I want the background of my form to be the same color as the window frame color that the user selects, even if that changes. I selected System->WindowFrame as my background color, but it always remains a dark grey, regardless of what I have my window color set to. How else would I achieve what I want? I assumed I was doing it the correct way. Do I actually need code that gets the system window color and then apply it?
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