VS 2008 Picturebox Not Updating In For Loop?
May 11, 2010
I am trying to make a for loop in which a picturebox is suppose to go up and then down. The problem I am having is that the picturebox is not animated; i.e, it does not update the image rather the image stays the same as from the start.
I am using timers to animate the picturebox and I have done something similar to:
For count = 1 to 8Select Case countCase 1tmrJump1.Enabled = TrueCase 2tmrJump2.Enabled = TrueAnd so forthEnd SelectNext
View 5 Replies
ADVERTISEMENT
Oct 13, 2011
I can do this with a for loop, but I was just curious if an arraylist can be updated using a for each loop. ie
For Each arrItem As String In myArrayList
arrItem = "My Stuff"
Next
If I loop through the arraylist again the values remain unchanged.
View 4 Replies
Sep 14, 2009
I am new to dotnet. I have an application with one login screen and three other screens.On login user can go to any of the other three screens by selecting the options.On all three screens i have a Picture box which i need to update the Image every one minute based on some logic.
View 2 Replies
Jun 8, 2012
In my winform application, I have 2 datatables, both contains 37000 rows. Table 1 has 171 columns and Table 2 has 4 columns. A While loop runs to update values in Table 1 from Table 2 for 4 columns. A For loop runs inside While twice to update values. It takes more than 5 min to do so. which i think should be a task of 5 seconds.
Columns being updated are:
Int64 - 1 Columns
String - 1 Columns
[Code]....
View 2 Replies
Mar 8, 2012
Windows Forms, VB application... Forgive me in advance for this very elementary question but I am overlooking something really simple here. I would like to have a label show the current value of a variable as the for each loop runs.. I created a very simple Button Click event to figure out where its failing. As it is right now the value does not display until after the for each loop finishes running, which it should actually display the counter value each time it runs through... I know this is possible and really simple because I did it years back but for the life of me cant figure out why I am missing the bar as it should constantly update the label to reflect that?Test Sub is as follows:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim counter As Integer = 0
For x As Integer = 1 To 200000
[code]....
View 2 Replies
Apr 10, 2012
I am working on trying to update a list of items to an Excel spreadsheet. I have created my own custom class called Songs and a List(Of Songs) that I want to update the spreadsheet with. It seems like everything is working -- I have even put in a debug msgbox that displays what Song it is currently on while iterating thru the loop -- but after the code iscomplete, I check the spreadsheet and only the first song in the list gets updated. I'm thinking it must have something to do with either the connection string or the parameters that prevents it from updating any other song records. BTW, there is no errors being tossed so it ats like it everything is being processed, just that the data doesn't change for the update inside the loop. Here is the section of
Private Sub btnProcessList_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnProcessList.Click
Dim adoConn As New Ole.OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;data source='" & _
[code].....
View 3 Replies
Sep 29, 2010
i have a screen capture running just as a picturebox on a winform updating with a timer... i have it so it shows my race in a game.... now all is running gr8 on my pc... im now looking to make it viewable to someone else thats connected to my chat server i have made a picturebox on the client form and have the capture code in my server im hosting on my pc...
so my question is how and what is the best/quickest way to do so? maybe memorystream? if so how do i go about that? how do i send a image over memory stream? or is there a better way?
View 2 Replies
Mar 18, 2011
I have the following code:
[Code]...
The problem I'm facing is that the update happens correctly only for the first of many values. All the other values are calculated and consequently, updated incorrectly in my table. I am almost certain that the looping is what is causing the problem but have been unable to find a way around it.
View 2 Replies
Nov 12, 2009
I'm trying to add picture boxes on my form for a connect 4 game. I'm trying to make the grid and use a loop to do so. This is the code I have so far, trying to make it a subroutine I can just call on my form_load.
'create picture boxes for game board
Private Sub pb()
Dim i, j As Int16
Dim space As Int16 = 5
For i = 0 To 3
[Code]...
View 2 Replies
Jun 22, 2010
I Have 100 Picture Box(PictureBox1-100) And I want to use Each PictureBox with loop like
[Code]...
View 1 Replies
May 8, 2009
I know this may seen a simple request, but if you start a timer, and jump into a while loop, how come the timer stops working unless you use DoEvents?
However, using DoEvents, if you have a picturebox to click to stop the timer, you have to click it twice to stop the timer?[code]...
View 2 Replies
Mar 7, 2012
I have some problems with a for loop in visual basic.
Public Const numofblocks As Short = 88
Public Shared blocks(numofblocks) As PictureBox
For x = 1 To numofblocks
blocks((x)) = PictureBox(x)
Next
The error raised at the picturebox statement: PictureBox' is a type and cannot be used as an expression. The result of this for loop is that every picturebox in the designer form is named: blocks([number of picturebox]). I need this for some other for loops.
View 6 Replies
Feb 6, 2009
loop all pictures found in this path C:Images to a pictureboxin the code below it show's all the pictures to the form..
Private getpath As String = "C:Images"
Private imageFiles As String() = IO.Directory.GetFiles(getpath)
Private imageIndex As Integer = 0
[code].....
View 7 Replies
Feb 4, 2010
I am a new member that has just start coding. Im currently working on a small application for a desktop that will give me information from my system. I have code that works but might not be great. I have code that checks that the network is connected but need it to keep checking and updating. I Have tryed loops, goto and timers but not having any luck. Can anyone help point me in right direction. Here is my code so far.
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Label1.Text = TimeOfDay
Label8.Text = "Time :"
[CODE].........................
View 2 Replies
Feb 24, 2010
This is my first attempt at doing something in VB.net. I would like to be able to read a text file consisting of a column of data values and then pass the data as a variable to a sub that produces a line graph and updates it with each iteration through the loop. So far I have the code to read the file as well as some code that produces a line graph using hard coded values.
I am unsure how to call this sub from my loop such that I can pass that data value read from the file to the graphing sub.
How can I call the "PictureBox1_Paint" sub from my loop? How can I pass variables read from the data file to "PictureBox1_Paint" when I am calling it? Is there anything different that needs to be done if I want the graph to update with each iteration through the loop (for each data point)?
Public Class Form1
Private Sub Start_button_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Start_button.Click
[Code].....
View 2 Replies
Oct 5, 2010
How can i display images in a picturebox using For Loop. Actually i've tried it before but only one image displays x times. What should i do so that all images will display?
View 5 Replies
Oct 17, 2011
So basically, i have 2 int variables, x and y i am using to create a grid of pictureboxes.This is all fluid and built on runtime.I am trying to specifically change the picturebox on click if mine = 2.I cannot specifically change one, when i click any, it changes all of them.
Heres my code:
Public Class Form1
Inherits System.Windows.Forms.Form
Dim images(8) As Image 'declares image array
[code].....
View 2 Replies
Mar 31, 2010
I have a PaintEventHandler connected to a picturebox via AddHandler.
In PaintEventHandler I have coded this for writing the drawing to PictureBox1.Image:
Dim PictureBox1 As PictureBox = CType(sender, PictureBox)
PictureBox1.Image = New Bitmap(PictureBox1.Width, PictureBox1.Height)
Dim bmp As Image = PictureBox1.Image
Dim g As Graphics = Graphics.FromImage(bmp)
... drawing something ...
PictureBox1.Image = bmp
Everything works fine but after running through the paint event handler and showing the picture on the screen it calls the painthandler again and again. It does not stop.
Replacing the code above with
Dim g As Graphics = e.Graphics
Makes it running. But then I cant save the Image to a file.
View 6 Replies
Feb 8, 2010
i'm doing a simple form tat could add picturebox during runtime and i could add several picture into it.
View 5 Replies
Jan 4, 2011
I am trying to draw a line on top of a picturebox but it keeps going behind the picturebox, even when I do Line.BringToFront()
View 10 Replies
Jul 13, 2009
I was wondering how could I drag an image from a picturebox to another picture box. Anyone knows? Any tut or something.
View 10 Replies
Aug 11, 2009
I assigned an integer as 1, and looped my program using:[code]I can recieve the packets without looping, but once i loop, i receive nothing.
View 29 Replies
Jun 22, 2010
I have two Datagrids, One grid has all the customers garments on it with style number and contact length. The other grid has the users who have garment issued to them. the style number is in both grids. I need to loop through the users grid and say if the contract number is 1 from the first grid then the contract date on the second grid will be todays date + 365 days (year contract) I have looked at using a stored procedure and also a for each command but I am just getting stuck with it all. [Code]
View 1 Replies
Mar 14, 2011
Makes the following statement about the code below:
**"The computer evaluates the loop condition in the Do...Loop statment to determine whether the loop instructions should be processed. In this case, the inputsales <> String.Empty condition compares the contenst of the input sales variable to the String.Empty value. As you know the String.Empty value represents a zero length, or empty, string if the inputsales variable is empty, the loop condition evaluates to True and the computer process the loop instructions. *If on the other hand the inputsales variable is not empty, the loop condition evaluates to false and the computer skips over the loop instructions.
Based on the code I think it is the opposite: ...that while the inputsales value is not empty it should evaluate to true and process the loop and if it is empty it should evaluate to false and skip the loop?
See below.
Option Explicit On
Option Strict On
Imports System.Globalization
[CODE]...
View 2 Replies
Apr 27, 2010
Having problem in updating an existing record. An error occurs "Data Type Mismatch in Criteria Expression"
Private Sub ToolStripButton1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ToolStripButton1.Click
Dim myBuilder As OleDb.OleDbCommandBuilder = New OleDb.OleDbCommandBuilder(dataAdapter)
[code].....
View 1 Replies
Jan 25, 2012
I have a webpage with a form that is used to edit some object. This object contains a Collection of other objects defined like this: Public Overridable Property Employees As List(Of Employee)
On a form I can delete an employee, add a new one or modify existing one. When I click save new values are sent to the server. On a server I check if the user exists. If exists then I modify its values, if it does not exist then I add it. All employees that exist on the server and were not sent are marked as deleted (State changed to EntityState.Deleted). I try to use the following code (dbCollection = database entities, newCollection = collection sent from the form):
[Code]...
This code does not work, because changing to EntityState.Deleted removes the object from collection, and for each loop breaks, since the collection is modified...I know that I can overcome this problem by using a for loop or adding objects to delete to some other list first, but I hope maybe there is a pattern that would make my code nicer.
View 1 Replies
Jul 28, 2009
I have spent several hours trying to delete a row and insert a row into an Access database using the OLEDBDataadapter and dataSets without any success. I don't get any errors it just doesn't update the datatable. Here is the last version of the code I have been trying to get to work. I have done a lot of searching and have
Data save
Private Sub SaveNumDte(ByVal ltoNum As String, ByVal ltoDate As Date)
Dim numTotal, x, MaxRows As Integer
[code].....
View 4 Replies
Jan 11, 2009
how to update the data of an SQL server 2008 express using vb.net 2008? My raw data actually from excel file only and i want to transfer all the data and merge it in my newly installed SQL server 2008.Normally im updating it daily that is why i want to create code.
View 6 Replies
Nov 4, 2009
I have made an updater program which updates several files used by another application (again made by me). It works great. But when it comes to updating the updater itself I was in a dilemma.My updater program can download a file from the server but because it is running it can't update itself. I wanna know what would be the best way for the updater to update itself.
I thought after the updater downloads its own new executable i would run a .bat file which would remove the old updater and rename the newly downloaded exe. But again as the updater runs the .bat file and shut down itself, there could be a violation.How can updater update itself in the best way ? (just need a way for updater to get a new exe and get it replaced)
Note: Updater is a single exe application made in .net 3.5. It updater another application by downloading and replacing files.
View 15 Replies
May 30, 2012
I am trying to get information into a database from VB 2008. I have an established connection and have pulled fields onto my form. I am able to see data already in the database on the form. Originally, I tried to use an Update button to send the data from the dataset to the database. This did not work. I then added a Save button to the Navigator on my form in hopes this would do it. This too, failed.
View 10 Replies
