In VB6 I have drawn lines on a picturebox and if I display another form the lines remain (I haven't drawn them in the paint event).In vb2008 doing the same the display is erased when another form is displayed.How can I reproduce the vb6 functionality in vb2008?
View 1 RepliesI've had 2008 express on this PC since it came out -- I basically have ONE important project that now is being troublesome.
Just had an "unhandled exception" and "configuration system failed" -- errors I've never received before and I've just made minor changes to the program.
For one, I was thinking about a fresh install of 2010 express (but remember some real problems when I upgraded from 2005, so ??) be afraid ? very afraid?
ALSO --
What are the mandatory files I need to save in a project folder?
If I delete the bin and obj folders (plus?) and let it write new ones will that sometimes cure some problems?
What is a good way to SAFELY keep all your hard work but get rid of possible clutter and ?
Configuration system failed to initialize --
I have an old VB6 project converted into VB2008 express. It contains a datagrid control called AxMSDataGridLib.AxDataGrid. This is probably legacy control from previous VB versions, am I right?
The application reads data to this grid using ADO and it works most of the time. It is supposed to be read only but I cannot parametrize it correctly and sometimes when I exit the application I get an exception. Now, I seriously lack skills of this IDE and .net framework since I don't know how to get more info about the exception. The exception is just a messagebox saying something like "Key column invalid or not sufficient. Update changed too many columns". This exception comes from this datagrid.
Now, since there's a high probability that this is an old control and I cannot get the exception handled, I was thinking to upgrade it to .net DataGridView. Does anyone know if upgrading this old AxDataGrid to .net DataGridView is possible and how to do it?
I am abit afraid to just delete the old control and replace it with new since the application works and I am not attached to any source control (for reverting changes). Maybe it's possible to make a copy of this project with another name and safely play with it?
i have got the copy of the VS 2008-professional currently i am using & all my projects are in VS-2008 EXPRESS how can i upgrade?
View 4 RepliesI have been using VB6 forever, but I need to to create new app versions for Vista/7, and beyond. My employer bought Visual Studio 2005 Pro a few years back, but i have never opened it.What would be the best upgrade step for me from VB6? Is 2005 adequate, or 2008, or 2010?
We primarily create apps for building and hardware controls, monitoring, logging, and communications. Will be using MySQL in the cloud with apps too.
I have a Visual Basic 6 program that I would like to update to Visual Basic .NET I am running Windows 7 Professional and have downloaded and installed Microsoft Visual Basic 2008 Express Edition. The problem I have encountered is that when I open my VB6 project file (.vbp) the Upgrade Wizard does not open. Instead, a list of references, objects and forms from my project appear. Is there any other way to run the wizard? Or am I missing something?
View 4 RepliesI have a couple of VB6 programs which work 100%, however not under W7, so I need to upgrade them to Visual studio 2008 pro which I own a copy of.The VB6 software used to open a file, read in a line of data and process it then save it in a new file, before going on to the next line input.I need to convert this process to VS2008 pro and can't get my head around it..... getting old you see.I also have a few other needs to do with file handling, but I may be able to sort them myself if I get a start with the above problem....
View 17 RepliesWe have a GIS application that has some performance issues. It creates and sends an image to a web browser. We start with a Bing Maps imager, add complex polygons (complete with transparent fill), save the finished image as a PNG, and send it to the browser.
The idea has come up that we could possibly install a graphics card and use DirectX or OpenGL to improve performance. I believe this would be the case even though we ultimately generate an image instead of sending the data the the screen. I believe our processes could still make use of the API and the hardware acceleration it provides. Our process is not unlike what CGI film makers do to render individuals frames of a film, though we simply render a single image and send it, as opposed to the hundreds of thousands of images needed for a single CGI film.
So my question is: would a powerful graphics card and use of DirectDraw or OpenGL provide us a worthwhile performance boost? It can take us 20-30 seconds to render a more complex map. Which is a long time to wait on a web page...
Im working on a project that needs to print a report of one client.Everything went smooth untill i came across my multiline input text data.When i display it in the PrintPagePreview the text go's outside my page. Even when im printing it only the halve of my text is displayed. I googled and looked everywhere but i can't get a clear fix for it.
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I used to program with Visual Basic 6, so I have alot of old programs that I'm updating, plus I'm learning the new VB2008 methods. I'm writing a program that replaces the old "BitBlit" function which is no longer supported by Visual Basic 2008. It involves three picture boxes, one holds the sprite bitmap, a second holds the mask (silhouette) of the sprite bitmap, and a third has a background image.
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drawing text on a window which is not the current form's window.I remember doing this in Win32 api with getwindowdc(handle) to obtain a DC for the Window, then textout() on the DC.
View 2 RepliesOk, I want to create a class that will handle a special rectangle graphic.In my form, I want to have two of these special rectangles. So, basically, I need two instances of that class in my form, right?I manage to initialize two, alright. But, how exactly am I supposed tomanage drawing/graphics etc in a class, and the results to be displayed in my form?
View 13 RepliesUsing graphics paths for designing...but am getting an error when trying to add a shape to : _shapelist.add(createshape())
It says : Value of type 'system.drawing.drawing2d.graphicspath' cannot be converted to '1-dimensional array of system.drawing.drawing2d.graphicspath'
I have just upgraded to 2010 and i am having a problem with my first conversion. Part of the applications form load which as been converted from 2008 to 2010 is to check if a string in my settings is empty or not (databasepath), if its empty then browse for the file. If the user prsses cancel then it should close the application. This was working fine on 2008 but now it gets to Me.Close, goes to formclosing then comes back to where it was in form load and carrys on until it throws an error further down the code where it shouldnt really get to. Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
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ok, i know the code is a little rough, but it should be good to give you an idea of what im trying to do, if not i will still explain.simply draw 2 lines one from left to right, another from top to bottom, intersecting through the tip of the mouse.ok, theres no problem there the lines draw perfectally the way i want them.... BUT! now heres the issue im having.i cant get rid the previous lines.i did a bit of good old "Google'ing" and ran across a few links that all pointed me to the ReDrawWindow API, so i tried (as you can see in the above code) but i just cant seem to get it worked out.
So I decided to make my famous tile selector project, but instead of drawing in a form's graphics, do it inside a tabpage.Well, I managed to get it working, but it seems to... flicker.Normally, setting the form's DoubleBuffered property to True would help a lot there, but apparently, the tabpage has no such property.
When I invalidate the tabpage, I draw two images and fill one rectangle.Following past advice, those two images were created before, just once, and are stored in a variable so I don't create them every time I invalidate the tabpage.
Ok I have this: This makes a sub called 'graphicspaint' then writes "demo version" to a picturebox1
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Imports System.Drawing
Imports System.Windows.Forms
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i whant do my own shadow effect. i can do the shandow. but how can i plus 2 bitmap images(1 above the other)?
View 15 RepliesI just upgraded a project from VB 2008 to VB 2010. Before, the project did not use LINQ. I have started implementing it. So, I have updated the target framework from 2.0 to 3.5, and added a reference to System.Core, and imported the namespace System.LINQ to the entire project and also imported System.Data.LINQ into the form I'm working with (because it was not available in the list for Imported Namespaces in the references tab).
It's not throwing any errors now, but my IntelliSense is not working for LINQ stuff.
For example... I write this:
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Then, if I type S. on the next line, the IntelliSense doesn't grab what it should for S (Only get Equals, GetHashCode, GetType, ReferenceEquals, and ToString, instead of the options I should get like Count, First, FirstOrDefault, etc...). If I Type S.First. then its the same thing, no IntelliSense that lists the available fields for S, just the standard options (Equals, GetHashCode, GetType, ReferenceEquals, and ToString). I should be seeing my column names in my table when I type S.FirstOrDefault.
So any ideas what is going on? When I type the code, for example, MessageBox.Show(S.FirstOrDefault.FirstName), it works perfectly. But it doesn't change the casing of the text (so it would read s.firstordefault.firstname) and no intellisense while doing it. But no errors. BTW - Everything works perfectly when creating a NEW VS 2010 application, it's just my projects upgraded from Visual Basic 2008 that have this issue.
I have one panel, is there anyway I can control two different drawings in that one panel? I have a gradient background which changes colors, then I have an Ellipse which I would like to move around the panel, without effecting the background gradient.
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I have written an address book and for its database, I used Access to create a .mdb database and store my data programmatically into this .mdb file.However, the problem is that when reading and saving data to this kind of database I have to use Jet 4.0 which is NOT available on 64-bit systems and I have to compile my application as 32-bit in order to run on all systems.I just want to know how is upgrade to SQL?I never used SQL, can I create a stand-alone database file using SQL like Access and create tables/fields so I can modify it programmatically?I also need the database file to be independent and don't need any special requirements to run on target systems, like the .mdb file I've created in Access!
View 1 RepliesI have been looking through the code bank and i cant find anything that is helping me with my problem what i have is a print button that when clicked it goes to my print preview page, then i can print the file. i have got all the other controls on my page to display correctly using this example
e.Graphics.DrawString(sType, New Font("Arial", 10, FontStyle.Underline), Brushes.Black, 110, 650)
but how can i get my ListView header and content to preview on the page as well. my listView has 5 columns and i am using the PrintDocument control.
I want to be able to do collision detection with graphics and a picturebox. I have a character that is moving on the screen and I have drawn both the background and the character using graphics. I have put a picturebox in place of the block that is suppose to be like a square which the character has to jump over. How would I do this?
View 6 RepliesAs we know, the Graphics class does not support for Indexed formats,like 8bpp, 4bpp, and 1bpp. Now I want to draw text on 8bppIndexed image displayed in my Picturebox. Also I want to PAN my image. If at all the "Graphics" Class supported 8bppIndexed Images, I would have done PAN Image using "LockBits" Method and drawn text on the Image using Solid Brush. But since that is not the case, how can I do these 2 operations without "Graphics" class.
View 6 RepliesI need to draw visuals in my program where a block of mass moves from position A to position B down a varying incline. The incline variable is set by the program. I know how to draw the block But do not know how to vary the slope and make block travel parallel to it. program to use for inspiration
View 1 RepliesI'm using the 2D graphics engine of Visual Basic. The graphics are fine for my purposes, however they erase when they move out of sight.I was looking at the System.Drawing.Graphics properties, and came across a save funtion, however that did not prevent the erasing.How do I prevent this from happening?
View 3 Repliesi recently posted a thread about the same project, but decided this was a more specific question, so i decided to open a new thread My question regards the graphics class in visual basic 2008. Ive searched the internet low and high for an answer to this, but i cannot find anything! I am attempting to 'shoot' a circle drawn on the form when the user presses the 'r' key. if a string property is set to right, the graphic should be drawn, then updated to different x coordinates based on an interval. if the property is 'up' or 'down' then the y coordinate of the graphic should be changed based on another interval. Now i cannot use one preset timer, because i would be able to shoot only one bullet at a time, which would not work!
Does anyone know how i can either create an array of graphics(bullets) and add to the list every time the user presses r, then using one preset timer, update them all, or simple create a timer every time a bullet is created, then update the bullet position with its own timer.
I am trying to make a graphics program with mousewheel-controlled zooming using GDI+. My plan is to provide rapid feedback, such as a low resolution render or even just a bounding rectangle, followed by a full resolution render as soon as possible afterwards. It seems logical to me to try a BackgroundWorker for the latter task. This is my first attempt to use one of these, or any other way of multithreading for that matter. Mousewheel events can follow one another much more quickly than I can render to the screen. That means I need to kill any rendering process that is already running and start a new one with the latest value of the zoom scaling factor.[code]The above class coexists with a DrawingSurface class, a UserControl which listens for the ProvideFeedback and ScaledImageReady events and paints the image accordingly. It also raises mouse/keyboard events for the zoom and other tools to deal with. My problem arises in the DO loop waiting for Cancellation to finish. The zooming routine works for one or maybe half a dozen renders, depending on the image size, but then it hangs in that loop and never comes out.
View 2 RepliesI need serious advice here please. I use Visual Basic Graphics Programming by Rod Stephens as a reference, and I have visited his site vb-helper.com to try some of his tutorials. I tried the scribble application and it's working out fine (you can download the snippet from his site).
What I have trouble with is zooming in. I am not sure where to start. I would like to zoom in to x2, x3 and etc. of the bitmap I am working on and I would like to be able to continue to edit the bitmap. This would mean that I have a larger pixel brush under the mouse cursor, to lay down pixels. So a x2 zoom would mean a 2 x 2 pixel.
Has someone done this. Do you have a reference I can use for this. This kind of editing is standard in almost every paint package. Even Microsoft Paint, but there is not too much basic information on how it fits together in code for vb .net. So I am looking for someone to point me in the right direction. As I said, I am using the scribble application as a base, so here is the link. [URL]..
Possible Duplicate: Best Strategy for moving from VB6 to .NET Conversion tool comparisons for visual basic 6.0 Is there a good tool anyone can recommend to convert a commercial VB6 application into a VB.NET application. I have discovered some free ones and some commercial one's, but can't find any reviews and opinions of developers who have tried and failed or tried and succeeded.
What are the complexities involved? I know that .NET uses managed code and multi threaded apartments etc whereas VB6 is based on COM.