I'm making a simple Image Debugger Visualizer. Code is below. I'm not sure if i need to manually dispose of the Image instance? Because i'm making a windows Form window and the PictureBox inside that contains my dynamic image .. do i need to add some special code when the form is terminating, to dispose of this?
here's the code..
using System.Diagnostics;
using System.Drawing;
using System.Windows.Forms;
using Microsoft.VisualStudio.DebuggerVisualizers;
using DebuggerVisualizers;
[assembly: DebuggerVisualizer(
typeof (ImageDebuggerVisualizer),
typeof (VisualizerObjectSource),
Target = typeof (Image),
Description = "Image Visualizer")]
namespace DebuggerVisualizers
{
public class ImageDebuggerVisualizer : DialogDebuggerVisualizer
{
protected override void Show(IDialogVisualizerService windowService, IVisualizerObjectProvider objectProvider)
{
Image image = (Image) objectProvider.GetObject();
Form form = new Form
{
Text = ("Image Visualizer - " + image.HorizontalResolution + " " + image.VerticalResolution),
Width = image.Width,
Height = image.Height
};
PictureBox pictureBox = new PictureBox {Image = image, SizeMode = PictureBoxSizeMode.AutoSize};
form.Controls.Add(pictureBox);
form.ShowDialog();
}
}
}
thanks for any help :)
Change your Show method to this:
protected override void Show(IDialogVisualizerService windowService,
IVisualizerObjectProvider objectProvider)
{
Image image = (Image) objectProvider.GetObject();
using (Form form = new Form())
{
PictureBox pictureBox = new PictureBox();
pictureBox.Image = image;
form.Controls.Add(pictureBox);
form.ShowDialog();
}
}
The using(){} block will call Dispose on the form after it closes, which will dispose of everything on the form also.
图片框控件不会处理图像,所以这取决于您,是的。
Um, I'm going to go out on a limb here and say you shouldn't dispose of it.
I never created a visualizer, and I don't exactly know Visual Studio does this, but it seems to me that if you dispose of an object in a visualizer, you might break the code you're debugging.
It all comes down to this line:
Image image = (Image) objectProvider.GetObject();
If that object isn't a clone, then you will be disposing the object created by the code that's being debugged. The code won't be expecting that object to be suddenly disposed, and S will hit the fan, causing you at least to have to restart your debugging.
I'd play it safe and NOT dispose of it. Think about it--you're debugging. That's not a long lived process. If you do leak a bitmap handle, its not the end of the world...
I think you should dispose it. It should be quite easy, just add a using() at the first line of your method (around the Image image = ... line) and end it after the form.ShowDialog().
I think it is safe to dispose the image, for if you want to change the visualized object you must call one of the TransferData/TranferObject/ReplaceDat/ReplaceObject methods to send it back.
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