I have a little question about the following Array in my project:
Dim mycuts() As String
I have certain paint method in my code that may only be executed if the array is not empty and has values in it: I have tried to achieve this in this way:
Private
Sub
xxx_Paint(ByVal
sender As
Object
[Code] .....
Can any body tell me why this simple paint project wont work.
View 1 RepliesOk I'm trying write a simple 2d game. I have a base class to render the game sprites. It uses the forms graphics object to update the scene. The problem is it will draw only one picture then it seems like the onpaint event isn't raised again to update it. How do I use the raiseevent method to make a call to the onpaint method. Here is the code so you can understand a litte what I am doing. TYVM
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With reference to my previous thread on Paint event handler.. [URL] I went to read up more on Paint Event Handler.. I have a button which draw out a path based on the user selection.. Below contains the drawing of the path portion of the button click event code
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However It did not activate the paint event when I clicked on the button.. Instead, the paint event still activate even before I click on the button? So can anyone teach me on how to activate the paint event when I click on a button?
i am making a program that can paint something.the painting code is easy to do, but i cannot find out how can i make the clearing of what i have drew.in this code u can see that i made it on the mouse click/down and while moving it it will draw a line.
private shouldpaint as boolean = false
Private Sub Form1_MouseDown(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles Me.MouseDown
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I have a UserControl that has a ProgressBar on it. The purpose of the UserControl is to be able to show the progress % on the ProgressBar as text. To do this it uses the MyBase.Paint event. To make it work the ProgressBar is made invisible and the UserControl is 'painted' with an image of the ProgressBar and then the text is painted on top. The UserControl has a Value property that is passed through to the ProgressBar.Value property.
I use this UserControl in two places, on a Splash form (not a standard Splash Screen) and also on the main form of the application. It works on the Splash form but not on the main form - by work I mean that changes to the ProgressBar.Value property cause the ProgressBar to show its progress. The cause appears to be that in the Splash form case the MyBase.Paint event is called as a consequence of calling Me.Refresh in the Set procedure of the UserControl.Value property, in the main form case it isn't,
i.e. Me.Refresh isn't causing MyBase.Paint to run.
The main form has two BackgroundWorker components. The first gets called (RunWorkerAsync) from Form_Load after the Splash form has been shown. The BackgroundWorker.ProgressChanged event updates the Value property of the UserControl and it works exactly as intended. The second gets called as a result of a user starting an operation and again the BackgroundWorker.ProgressChanged event updates the Value property of the UserControl but MyBase.Paint doesn't run so the ProgressBar remains resolutely static.
Any ideas why it won't respond to Me.Refresh in one case but does in the other? Happy to make any of the code avaialble but didn't want to fllod the first post with reams of it. Here's what I think are the most relevant code sections. First the UserControl
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To .NET after getting tired of using VB6 due to the lack of functionality. I'm trying to create a log on method for a system which will involve users selecting a colour from a paint panel and then placing/drawing the colour in 1 or more tiles of a grid, basically a 3x3 grid in which for example they selected the blue colour and drew in the top left tile and the bottom left tile. The logon is selecting the correct colour and placing the colour in the appropriate tile. What i want them to be able to do is place even a single pixel of colour so it has a high accuracy. So far i have a timer which loops from the width of the grid to the height of the grid.
Private Sub Timer1_Tick(sender As System.Object, e As System.EventArgs) Handles Timer1.Tick
Dim 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), _
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To start with i have just hard coded the colour i want it to detect. At present it produces an error. Parameter must be positive and < Width the error is on System.Drawing.Point(i,j). If i place the mouse over the colour then run the program it will say it has been found, but otherwise it wont find the colour. I believe i am not updating the location of the pixel or something to that effect.
How to create a Paint program with all the functions of Microsoft Paint?
View 5 RepliesHow can microsoft paint(or any other painting software) be included in a VB.net project? I need to used its functionalities to maipulate jpg and movie file. Is there any ways this can be done on VB.net (or Visual Studio).
View 2 RepliesI wanna create extension method for IEnumerable(Of FileSystemInfo). However, compiler says "'Sort' is not a member of'System.Collections. Generic. IEnumerable(Of System.IO.FileSystemInfo)". What is strange is that IntelliSense shows this method. Where's error? [code]
View 1 Repliesi copied
' This example demonstrates the
'Console.CursorLeft and
' Console.CursorTop properties, and the[code].....
the code straight from the source <<< a couple of pages back thataway i'm getting a build error about the users ameappdataloca emporary projectsfile.exe not found.VB Express 2008 on Windows 7. how to output text to different parts of the screen.
I have a function that I use to copy files from one location to another.I want to incorporate a status bar to illustrate the progress of copy.I am assuming that I need to put additional logic after my File.Copy stmt below. [code]
View 9 RepliesI have a function that I use to copy files from one location to another. I want to incorporate a status bar to illustrate the progress of copy. I am assuming that I need to put additional logic after my File.Copy stmt below.
Public Sub CopyFiles(ByVal sourcePath As String, ByVal DestinationPath As String, ByVal fName As String)
If (Directory.Exists(sourcePath)) Then
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I am trying to post simple data to some site, in this example to a php file on my local server. My VB.NET Code:
Dim W As New Net.WebClient
Dim A As String = ""
W.Encoding = System.Text.Encoding.UTF8
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so, when I start the VB.NET App, it just simple calls the p.php (GET) but POST doesnt work. Tried everything. Upladed the p.php to other servers, checked other variables in php ($_REQUEST), used the UploadString(URL,"POST","bla=test), used PERL, ASP.. nothing.I am using .NET Framework 3.5 how to Post data with vb.net?
I can't figure this out. I have a bitmap that will be used throughout an application, so I can't declare it with a Dim statement in a procedure, or it isn't recognized as having been declared in other procedures. So I declared it at the top of the form class, two ways. This one works: Private MyBitmap As New Bitmap(622, 461) It makes a bitmap to the exact size of a picturebox I have. But I want to be able to change the size of the picturebox and not have to worry about going back into this declaration to set things up, every time I decide to change the box's dimensions. So I tried this next version, but it doesn't work:
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I Have a Function on my frmMain Class wich will update my control to something else after an invoke. When i type "?Label1.Text" on the Immediate Window, the text property IS updated, but when i go check the Form, nothing happened. The code is just like this
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I have a .dll file (Interop.ACTMULTILib.dll) that I use to connect to a PLC. This .dll contains a sub called ReadDeviceBlock2(byval devicename as string, byval size as integer, byref data as short). When I call this method in my main it works fine, if I call it from another method that was called by main it works as well.However, it doesn't work when I call it from my Timer_Elapsed sub? I guess this has to do something with threads but I can't figure it out.
Module Main
Private Timer As New System.Timers.Timer
Private PLC As New ACTMULTILib.ActEasyIF
Private DataSet As new DataSet[code].....
Will the list in this shared method keep its state throughout the life of the method? Or will a new list be created every time this method is called?
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I am experimenting with a transition from my application built in VB6 to vb.net. I know, about time. At the same time, i am making changes and improving upon the original. One area that I am working on is within my employee class. very standard class, nothing fancy. One change I want to make though is allow for an employee to be assigned more than one work location. Employee has (is assigned) Stores. In reading about collections, it appears they are different in .net (as they should be), but I don't know what the sytax changes will be to implement my changes.
View 6 RepliesI've got a simple tool written in VB in VS 2010 that has a series of command buttons which run Windows command files and the output is sent to a Rich textbox object on the main form (the comand files take awhile to run so I wanted the output to show up in the RTB as it was produced to show progress). All worked well until I made an update to the tool so that the series of buttons are no longer hard-coded, but created dynamically from information in the app.config file. To do this, I use a button
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I'm building an online shop, but have run into a problem.When the user click that they want to add a product to their basket, i add the product ID to an array that is held on the session.This all works great and i display how many items they have selected etc..The problem comes when i get to the checkout page.Whats the best way of displaying the items that the user has selected?
should i use a datagridview? if so, how do i pass the array into the SQL in order to get all the data rows that i need?
should i use a repeater? this gives me the same problem as above though.I just cant seem to work out how to get the values fro the array and then run the sql for each ID to get the information to show on the screen.I could loop through the array using each ID as a parameter in the SQL but then where do i put the data? in a dataset? a datatable?
Basically on form2 i have a listbox. And on form3 i have 6 listboxes. I want listbox 2 to equal listbox (a listbox on form3) my current code does not work Private Sub formAustralia_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
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I am trying to write data to a binary file using the Print() method, but when I run it I get the System.IO exception Bad File Mode.
Here's the code for the FileOpen declaration, that might have something to do with it?
FileOpen(filenumber, "path to file", OpenMode.Binary, OpenAccess.Write, OpenShare.LockReadWrite)
Print(filenumber, expression(variable))
I have a program that will compare an array of grocery list items glist and an array of coupon item clist.When I compare the two and if there is a match somewhere in the array I want to have a picturebox visible.When there is no match, I want the picture box not to be visible. [code] The code seems to work great until I come to the else statement.When the code finds a match it displays the picture box and the msgbox without error, but as soon as the message box is cleared, even though i've input it as an ELSE statement, the picturebox goes false again.Does anyone have any idea of how I can "hold" the picturebox to stay visible while the match between the arrays exists?
View 18 RepliesI gather case info from a DB table into a list(of T) list and display it in a checkedlistbox. When an item in the checkedlistbox is selected (highlighted, not checked), the selectedindexchanged event then retrieves account information from the DB for that case and loads the different accounts for that case in another checkedlistbox.
My issue is figuring out the best way to save the different items that are checked in the accounts checked list box. Since the accounts are loaded dynamically given the selected item in the cases listbox, what would be the best way to save which accounts are selected for each case?Below is my current method of loading the listboxes and selectedindexchanged procedure. I'm fairly new to programing and this is how I was taught load most controls, by list after saving to the list from the DB (which gets very complicated when you have to keep relations between items in separate lists).
Private Sub btnSearch_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSearch.Click
Dim CasesList As New List(Of String)
CasesList = Db.GetAccounts(CDbl(txtAccountBalance.Text))
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I am using visual absic 2008 express edition. I am trying to produce two (FromNode, ToNode) random numbers and store in an array (ArrayTo(NoConnections)). The array should not have same values at the same time and the aary should not have the same number or the other way around. For example, The array should not have numbers like 22, 55, 66¦etc If the array has 13 and 45 then 31 and 54 is not allowed in the array and vise versa.
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The values for the 10 variables belonging to the modified array should be equal to the ages of 10 of your classmates. You must begin by gathering ages from 10 of your classmates and recording them for use in your program. Instead of calculating and displaying the total of the array values, find and display the average age of your 10 classmates.
Module Module1
Sub Main()
'define variables
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ok, I got a lot of conceptual code for major chunks of the game's engine...like an inventory array of variables... he says that we will be using a lot of variable arrays, and I am trying to get a variable array dimmed in an inventory module, but when I try to declare what each index of the array should be, it says "declaration expected" and simply trying to reference the array from within another form, it does not register as existing...
the code is as follows, for he has not a clue how to program in vb.net
dim character_inventory(19) as array
and when trying to tell vb.net to set an individual index to nothing, it throws a "declaration expected" error...
character_inventory(0) = nothing is when it throws that error...
Public Shared Function EncryptRSA(ByVal infilename As String, ByVal outfilename As String, ByVal pubkey As String) As String
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how to use Array.Exist. I want to check if a value already exist in the array or not. Below are my sample code.
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Type argument inference failed for type parameter 'T' of 'Public Shared Function Exists(Of T)(array() As T, match As System.Predicate(Of T)) As Boolean'. Type argument inferred from the argument passed to parameter 'match' conflicts with the type argument inferred from the argument passed to parameter 'array'.