picturebox

Switching PictureBox Images C#

I'm trying to make a "checkbox" that has a custom check image. I need it to toggle between checked and unchecked when the user clicks the picturebox. I've tried the following code, and the first click shows the checked image fine, however a second click does nothing. Any ideas? private void pictureBox7_Click(object sender, EventArgs...

Making a TextBox Transparent

Hello, I have a TextBox in my Form that I want to let it be tranparent and show a picture that is in a PictureBox, behind it, but how I can do this? Thanks. ...

Alternating pPicture boxes with updating images stop showing on form after a while

Hi, I've got two pictureboxes in a windows form which are assigned a new image in a separate thread, then are made visible to the windows form. So if we had two pictureboxes, A and B, if A is visible with an image on, B is invisible and a bitmap is loaded from a file and is assigned on the image property of B on a separate thread, then ...

Transparent PNG in PictureBox

Hi I am trying to make simple app that allows one to compare image to transparent PNG templates, by dragging the template over picture. For this I need a way to create a PictureBox that will contain the PNG image and be transparent where the the png is transparent. Everything works fine but the transparency part: When I load a PNG image ...

How can I cause a panel to scroll programatically to expose its AutoSized picture box

I have a picture box set to AutoSize so that the image forces it to grow to the image's full size. The picture box is in a panel with autoScroll = true, so that scroll bars appear when the picture is larger than the panel. How can I programmatically scroll the panel as the user clicks the drags on the image, thereby repositioning the i...

scroll using mousewheel inside panel with dynamically added picturebox controls

I've dynamically added 20 pictureboxes to a panel. i would like to see the panel scroll when I use the mousewheel. I set the autoscroll = true on panel control. Here is the code. For i As Integer = 1 To 20 Dim b As New PictureBox() b.Image = Nothing b.BorderStyle = BorderStyle.FixedSingle b.Text =...

c# picturebox memory releasing problem

Hi everybody. I'm a newby in C#. I have to repeatedly refresh a GUI picture box in a worker thread. The image is acquired from a camera polling a driver with a GetImage method that retrives the image to be displayed. Even if I allocate the bitmap using directive "using" and explicitly call G.C, memory seems to be never deallocated. The...

winform .net best way if you want to display images in a datagridview

hello i am a .net webdeveloper and usually don't make any win32 apps. but now i have to. i have a list with about 2000 entries. each entry should be displayed as, a label with textbox another label and picture. i have made this with a flowlayoutpanel and i did a foreach on the entries to make a panel for each entry with the label, textbo...

PictureBox.Refresh() is slow when drawing in a PictureBox

I have a Windows Form Application in Visual Studio 2008 - PictureBox.Refesh() method causes a delay when drawing on a PictureBox. Is there any method that gives the same result without delay? ...

Moving pictureBox in panel

Hello ! I have a project in C#, WindowsForms and I created a panel that contains a pictureBox that is much bigger than his parent. I turned panel.AutoScroll to true and what I want to do is dragging this pictureBox in panel instead of catching a scroll and moving it. I.e. when I grab an image and move cursor to left and down I wou...

C# Panel.BackgroundImage + transparent Controls = flickering?

Hello, I've got a Panel with a jpg BackgroundImage (with BackgroundImageLayout = Stretch). On the panel it's Controls I add some PictureBoxes with a PNG which has transparent borders. Displaying this doesn't give any problems, but moving (the boxes are draggable) the PictureBoxes does. The result is that the moving PictureBox "disturbs...

"A generic error occurred in GDI+" after loading a PictureBox with an animated GIF

I have a Windows Forms application in .NET 2.0 with a PictureBox on a form and I load it with an animated GIF by setting the PictureBox's ImageLocation property. When it is time for the animation to render the next frame, I get the following exception and stack trace: A generic error occurred in GDI+. at System.Drawing.Image.SelectAc...

[WindowsForms] Graphics transparency on PictureBox

First of all, this is not about making the PictureBox control transparent. It's about bitmap transparency on the fully opaque "canvas". The PictureBox will always have the size of 300*300 with white background. No transparency is needed for the control. What I need is the way to draw the transparent rectangle (or whatever else) onto th...

WinForm: Selection box flickers when dragging the mouse

Hi. I made a click-drag selection box in a picture box. In the picturebox Paint event hander I use e.Graphics.DrawRectangle(pen, rectangle); and update the rectangle and refreshe the picturebox in the mouse move event handler. The selection box looks smooth as long as the mouse remains at the bottom-right corner (i.e. drag to right/b...

C# WinForms: How to load an image, then wait a few seconds, then play a mp3 sound ?

Hello everybody, (after pressing a button) i would like to show an image (using a picturebox), wait a few seconds and then play a mp3 sound, but i dont get it to work. To wait a few seconds i use "System.Threading.Thread.Sleep(5000)". The problem is, the image alway appears AFTER the wait time, but i want it to show first, then wait, ...

Add PNG image to picturebox dynamically?

I can't add a PNG image that contains alpha chanel into a picturebox dynamically by code because it always replace the transparent area with the black color. Is there a way to do it? ...

WinForms performance mystery: derived PictureBox control slower than the original?

In my .NET 2.0 project, I made an empty derived class of System.Windows.Forms.PictureBox: public class NewPictureBox : PictureBox { //absolutely nothing } Then I did the following: set both the derived control's and the base control's Image property to a rather large image (800x600), SizeMode is Normal (only the upper-left port...

images vb.net file used by another process error

Hi I'm writing a little program where I select a picture through an open file dialogue. When I selected a picture I want it to overwrite the current picture and display the new image. Now I don't have any problems with picking an image with a different extension. So when I currently have a .png I can select a .jpg but when I choose an i...

C# System.Drawing.Bitmap <-- how to check if image is valid before adding it to picturebox!

How do I do that in C#? :) Thx! ...

How can I load a generated Bitmap into a PictureBox?

There seem to be many picturebox questions out there, but I haven't found any that deal with changing the contents of a picturebox to a bitmap that was not simply loaded from file. My application takes an array of bytes and generates a bitmap from them. I really want to avoid writing to a file as an intermediate processing step. Becaus...