Display Them As Large As The Screen Will Allow?
Mar 10, 2012
I propose to start a project which will take image files from a folder selected by the user, and display them as large as the screen will allow. I shall start with images that will be in the form 'filename.jgp'.I reckon I'll be able to do most of the coding without too much trouble but before I begin I'd like to know that there is a way of discovering the x and y pixel sizes of a .jpg file so that I when expand, or reduce it I will be able to keep the image in the correct aspect ratio.I'd also like to know if there is a way to rotate an image through 90 either clockwise or anticlockwise, (counterclockwise) for those cases where an image is stored sideways due to the difference between taking photographs either in landscape or portrait mode, or even through 180 I guess for if the camera was totally inverted.
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May 4, 2012
The title asks it all, if i have a form with a picturebox (dock = fill), and it loads a bigger picture than the screen bounds, and i want that form to resize so it fits the screen but having the same ratio as the picture size. How shall i do this?
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Dec 19, 2009
Im trying to make a custom splash screen , but i cant seem to get it to work. Im trying to display a welcome screen for 3 seconds then close and display form1 (main form).Heres my current code.
[Code]...
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Aug 11, 2011
I'm working on a .Net Windows application. All the controls arrange fine, but when the user specifies their Windows display text to be larger than the Windows 7 default of 'Smaller', the controls get moved around on the form and makes it unusable.
Is there a way to lock down those controls no matter what the display text setting is at?
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Jan 7, 2011
I am trying to show a large amount of data in gridview but the problem is that everytime data increase the gridview row size increase automatically.
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Aug 4, 2009
I'm trying to have it so theres a big list of items for example:
item1
item2
item3
[Code]....
I was thinking a list box? but I'm not all too sure on how to use one. I'd like the user to be able to scroll down through the list OR use a search. How could I search the list?(Id use a textbox as what to search for and a button to search the list.)
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Nov 22, 2009
How do I display a large amount of fixed text (about 400 words) in a form. I also need to have scroll down bars.[code]...
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Nov 11, 2009
What I want to do is display large amounts of text and a few pictures, ideally with hyperlinks between the pages. A lot like wikipedia really, lots of similarly arranged pages, text in categories with in-line hyperlinks and the occasional picture to illustrate a point.But not online, integrated as part of a larger app.
How would it be best to go about doing that? The display method is sortof dictated by the storage method. My thoughts were:
Lots and lots of labels stored in an Access database
Straight HTML as if it were a webpage embedded in an iFrame or something
Labels populated from XML files?
Program the whole lot in Flash or something else (A language I can't speak)
This is only a mockup for demonstration purposes so the priority is user-friendlyness and ease of programming rather than storage concerns or good programming form.
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Mar 31, 2010
I need to display 3 columns and a varying amount of rows (typically around 50) in a windows form, kinda like excel. The data will likely be longer than the window, so a scroll bar will have to come into play somewhere.
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Aug 11, 2009
I am an experienced programmer but mainly in 4GLs and assembly. Relatively new to VB programming, especially GUI applications. On a form I need to create an area that will be used to display *extremely* large TIFF images. typical image size would be 2000 pixels by 100,000 pixels. Typically I will NOT want to display the entire image at once, so the area will need to have scroll bars and/or other methods to scroll/pan around the image.
I have read about and tinkered with the bitmap and picturebox objects, including some threads about several different ways to implement scrollbars. However, I see that the picturebox size is limited to 32K pixels in both dimensions. I suppose that I might be able to copy various portions of the bitmap to the picturebox depending on scroll position, but that seems potentially quite slow and cumbersome. Can an expert developer who is experienced with these types of issues regarding the following:
1. Can bitmap objects be used effectively with TIFF images of the size I am working with?
2. an approach that should produce reasonable scrolling performance for these extremely large images without excessive coding effort?
3. For an image that exceeds the picturebox size when displayed at 1:1 scale, is the picturebox capable of displaying a reduced size version of such an image without lots of code, and if so, how?
4. Many (most?) graphics display objects count on all of their display data being stored in memory rather than on disk. Would that be true of a TIFF image loaded into a bitmap object and displayed via a picturebox? If so, the amount of RAM required in order to buffer the entire image in memory could be a potential problem for images of this size. Is there an advisable way to have the picturebox or other display object only load portions of the image into memory on an as needed basis, and purge them once they are no longer required? Are there any built in objects/methods/properties or is there any sample code to show how to do this?
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May 14, 2009
I am trying to put colored text into a list box. I use the following
Private Sub ListBox1_DrawItem(ByVal sender As Object, ByVal e As System.Windows.Forms.DrawItemEventArgs) Handles ListBox1.DrawItem
e.DrawBackground()
Dim myBrush As Brush = Brushes.Blue
Select Case e.Index
[Code] .....
This works fine and dandy as long as I use 8 pt font, but when I change the font to 20 I get the following: How can I get the list box to display colored text in a large font?
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Mar 24, 2009
I am new to VB.Net, but I can tell you so far I love programming. That said, I'm building a tool basically to parse and display simple plain text log files. I'm hitting one stumbling block that really has me frustrated.
Other tools are able to load huge log files (500MB even) in a number of seconds. My tool, basically hangs loading a file that is maybe 5MB.
I'm using the MyString = StreamReader.ReadToEnd to read the contents into a string, and then RichTextBox1.Text = MyString to display the contents. That said, I really want to display the contents in a datagrid, but there has to be a better way of doing this?
How can I get my application to load larger files and display them faster? What am I doing wrong?
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Jan 7, 2011
Is there any way we can display welcome screen with vb.net?
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Mar 8, 2009
In the application i am developing is there a way i can see tha values of certain variables?[code]...
if i do: messagebox.show(varRequest1.ContentLength) it print numerically the value, but i really need to see what the cookie contains to see where i'm going wrong kinda thing i have tried .tostring but i get an error
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Jan 18, 2010
How do I get a VB program to display a character to the screen after clicking a button and then once the character has been pressed for the character to dissapear from the screen?
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Jun 9, 2011
I want to write a program to do Markov chain, but my states are quite large. First of all I calculate all the transition probabilities and revenues for all states(1381860 total states), and store in a multidimensional array. Public RevArr(0 To 9, 0 To 750, 0 To 282) As Long
After that the iteration of markov chain should use these as inputs to calculate the steady-state probabilities. But when I try to run the main code I got this error.Exception of type 'System.OutOfMemoryException' was thrown.
The following is the declaration of second array I add just another dimension for storing all the iterations, but I get this error. Dim stateprob(IT + 1, 0 To 9, 0 To 750, 0 To 282) As single
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May 26, 2009
I am working on a project where I have a signature displayed on the screen that is drawn via code based on data that has been transmitted from another device. This is from one of the samples from MS. The signature displays on screen just fine but I need to convert this to a bmp or jpg so I can save it to disk and/or print it on a report.
Code:
PrivateSub DrawSignature(ByVal g As Graphics)
' background
g.Clear(Color.Cornsilk)
' border
g.DrawRectangle(Pens.Gray, 0, 0, pictSignature.Width - 1, pictSignature.Height - 1)
' return if don't have a signature
[Code] .....
I have tried creating a new bitmap from the image property of pictSignature but it is empty even though it has an image displayed on screen. This is the first time I have tried to work with this type of coding and am totally at a loss as to what I need to do to get a bitmap from the data.
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Jun 10, 2010
i made a class which has speed,symbol (string "*") and location what is the acceptable way to actually display the class symbol property on the screen ?the class will be stored in a list<OF T> and will contains hundreds dynamically instances
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Jan 26, 2010
This is the current code I have so far[code]...
Currently the program starts by displaying a character to screen, but I would like it to first wait 5 seconds before displaying the first character.
Then the character should not change until the user presses the corresponding character, upon which after a further 5 seconds a new character appears.
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Dec 7, 2009
I'm writing a small app which I want to display a splash screen. The problem is my form 1 is appearing before the splash screen disappears. In fact is appears on startup blocking the splash screen. I have some code in form_load and have managed to figure out which line is causing the error, but I cant figure out why or how to prevent it.
The line reads
LoadSettings()
If I comment out this line everything runs fine and there's nothing in that sub that should affect form1. I'm doing this in vb express 2010.
Here's the code for my form_load:
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
LoadSettings() ' this line is causing the problem
My.Application.MinimumSplashScreenDisplayTime = intSSDelay * 1000
'resolution check
[Code] .....
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Nov 25, 2010
I've a form set to size 1240:750. On my PC where I've VB2010 installed, the screen size is set to 1680:1024 and the form can be viewed fine but on a PC with screen size set to 1280:1024 (higher than the form) the form in question is cropped almost a third of it. To adjust the form to everyone screen size I set the below code at load with no avail.
'Autosize form to screen
Me.Height = (SystemInformation.PrimaryMonitorSize.Height) * (0.9)
Me.Width = (SystemInformation.PrimaryMonitorSize.Width) '* (0.9)
Me.MaximumSize = New System.Drawing.Size(Me.Width, Me.Height)
Me.MinimumSize = New System.Drawing.Size(1240, 750)
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Jan 14, 2010
I created a bitmap, that is supposed to be displayed on the screen, in the middle. It will have to be on top of EVERYTHING!! Even if a full screen application is running, I want it to show. My questions are: Is it possible to even display a CUSTOM MADE bitmap on the screen?
Option Strict Off
Imports System.Drawing.Drawing2D
Imports System.IO[code]....
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Feb 15, 2012
In data base data is stored as
task line_item Amount
task1 lineitem1 amount
task2 lineitem2 amount
[code]......
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Jul 1, 2009
I want to display a scrolling text on screen just a bit above the bottom of screen. Like news text scrolling at the bottom of screen. How can i do that using vb express?
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Jan 14, 2010
Hello.. I'm using a splash screen for the first time in an exercise. I have it set up to display the splash screen before going to the main form. I made changes to the splash screen title and copyright information. When I execute the program, the splash screen comes up but it's not displaying the information I changed. When I view the splash screen the changes are saved. It displays the project name where the application name should be.
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Oct 31, 2011
I have an application with a SplashScreen. While loading the application, the application will check certain conditions and if the condition fails it throws a message window. I problem is when the message window is thrown it is displayed just behind the splashscreen and user is not able to see the message and unable to understand whats happening while the SplashScreen is displayed as it is till he clicks ok on the message box.
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Apr 20, 2010
how to read the screen resolution value of the Current display (which is not the Primary display)? I have three monitors and want to place a label on a form so that when the form is moved from one monitor to another the text in the label reports the resolution currently set on that monitor.
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Jul 31, 2011
I need to display two forms on the screen. When I change the record being viewed on form1 I need to change the display info on the second screen. I now know how to share the info, but need to be able to 'refresh' the information on the second form
[Code]...
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Jun 29, 2011
BTW this issue occurs in any MS office program when the VB.Net (or even VBA) is processing information.Example: In Excel, a worksheet is displayed on the screen. I start either, a VB.Net or VBA procedure and within 30 seconds the Excel worksheet (previously displayed) blanks out. In both VB.Net and VBA,ScreenUpdating = False. My expectation is that the previously displayed screen would stay static as if I left my desk to get a cup of coffee; came back and the same ole Excel worksheet was still there?Of course, setting VBA Screen Updating = False accomplishes two goals: 1) speeds up processing and 2) saves the user from seeing unnecessary "garbage-processing" steps.Why does VBA or VB.Net ScreenUpdating = False not freeze the screen at the time of its invoking?
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Apr 26, 2010
What I am attempting to do is make a form for a tire shop. I want to put comboboxes on the left side of the form that the employees make choices from. I then want to put some kind of a table or grid looking thing on the right side of the form that will display their choices so that everyone in the shop can look at it see that "John is on bay 5 until 3:00pm". At the end of the day I want all of the combobox choices to save to a file..I dont really need the table or the grid thing to save..just the choices. If I want to do this, do I need to use that gridview tool? or can I make my own table thing to display the choices in.
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