Changing An Image At Run Time?

Nov 11, 2009

I am attempting to change an image at run time but continue to get an error stating, "File not found, Exception was unhandled. I am assuming the error is with the file path but I have not been able to find a working variation.

Below is the code I believe would be correct but I continue to get the error. If working properly, the program would change the text and picture based on user input.

Private Sub btnInfo_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnInfo.Click
Dim strFriendName As String

[Code]......

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Private Sub Timer2_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer2.Tick
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Label6.Text = Now.AddHours(3)

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VS 2008 Changing Button Propertis At Run Time?

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i've got buttons i'd like to highlight on mouseover. how does one change the image associated with a button?

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my environment: windows xp pro (sp3), visual studio 2008 pro, (sp1, sdk 1.1)

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[Code]...

When I click the button nothing happens. What am I doing wrong here ?

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VS 2008 For Loop - Changing Panel Number Each Time?

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For Each Ctrl As Control In Panel20.Controls
If TypeOf Ctrl Is CheckBox Then
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End If
Next
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i have a program i've made a while, and one of the users wants to be able to load his own images to the background instead of the plain grey that is there now. i've searched and searched, and basically can get this working

BackgroundImage = Image.FromFile("C:UsersMeFileName.png")

i just slapped that onto a button just to get it to work as i was experimenting. but that only works for a file of that name, on my computer, in that folder. what i'm looking to do is get it so a user can browse his own directories for images and upload them as the background on the form. and be able to save the settings as well. but so far i have only seen different ways to load preset images that you can load. if it's even possible? i'd assume that you'd use the openfiledialog command, but i'm not that well versed in vb as of yet.

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Although my code compiles, it does not result in a change of the background picture of button1 here is my current code. Is it possible that my condition contains some error? or is the command itself wrong? [code]

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End Sub

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Private Sub TileClick(ByVal sender As System.Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles PictureBox99.MouseClick, PictureBox98.MouseClick, PictureBox97.MouseClick, PictureBox96.MouseClick, PictureBox95.MouseClick, PictureBox94.MouseClick, PictureBox93.MouseClick, PictureBox92.MouseClick, PictureBox91.MouseClick, PictureBox90.MouseClick, PictureBox9.MouseClick,

[code].....

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[Code]...

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Unwanted Image Changing Between 2 Picture Boxes

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I started computing at college about a month ago and have been learning to program in Visual Basic 2008 Express. I decided one weekend that I would try and make a pretty simple game that I may be able to use for my coursework at some point (I know Visual Basic isn't everyone's first choice for games programming but I thought I could try), I have learn a great deal from doing this but have encountered a rather odd bug in the program.

[Code]...

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sButton1.Image = My.Resources.image1

But I'd prefer to change all in one go (Loop) instead.

sButton(0) = "item1, item2, item3"
sButton(1) = "item2, item3"
sButton(2) = "item1, item3"

[code]....

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I have a DataGridViewImageColumn that should display an image for only certain rows. After I bind a generic list of classes to my datagrid, I loop through each row and update the image cell with an image that is an embedded resource for the rows that require the image. This works great if the form has been fully loaded. However, when I attempt this on form load the image doesn't show up? I also can't perform simpler things such as changing the row background color on form load. Should I be performing this logic in a different event after form load?

For i As Integer = 0 To dgvRoles.Rows.Count - 1
Dim imageStream As System.IO.Stream = Nothing
imageStream = Me.GetType().Assembly.GetManifestResourceStream("MyApplication.Timer.png")

[Code]....

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I want to programatically delete some pixels that are unused in order to reduce the image size.Can anyone tell me how to reduce the size of an image file without changing the pixels values..

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VS 2010 Function For Changing Picturebox Background Image With String?

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What I have done is named a bunch of picture boxes "Q," "W," "E," etc. (the whole alphabet) and named picture that correspond to these picture boxes ("Q.png," "W.png," and so on) and added them to my resources.

For example, the following code would give the picture box named "Q" it's corresponding image "Q.png":

vb
Q.BackgroundImage = My.Resources.Q

Of course, it's kind of a pain in the backside to copy and paste this code and change all the Q's to W's and so on, so I was hoping to create a function to do the job for me:

vb
Private Sub Form1_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
'So that I can run the letter as a string through the function,

[Code].....

Hopefully I've provided enough detail so that it is obvious what I'm trying to do.

Obviously, the code I tried above (the second block) doesn't work - it gives a syntax error. I need to change/write to make this function functional.

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Any thoughts on what might cause a thread error like this?Error:InvalidOperationException was unhandledCross-thread operation not valid: Control 'Form1' accessed from a thread other than the thread it was created on.

Relavent Code:
Private Sub SerialPort_DataReceived(ByVal sender As System.Object, ByVal e As System.IO.Ports.SerialDataReceivedEventArgs) Handles SerialPort1.DataReceived

[code].....

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