C# 从单独的类访问表单成员

发布于 2024-09-18 00:49:24 字数 461 浏览 8 评论 0原文

我需要一些关于实现特定结果的最佳方法的建议...

我的场景...

我有一个 Form1 类，这是我的主窗体，上面有一个图片框。

我有一个称为相机的第二类，它使用事件处理程序从我的网络摄像头抓取帧（位图）。

然后我想以最好的方式将此框架传递到主窗体中的图片框。

目前在主窗体中我有代码：

public static void setPB(Bitmap image) 
{

var form = Form.ActiveForm as Form1;
form.pbWebCamDisplay = image;

}

然后在 Camera 类中我使用

Form1.setPB(currentFrame);

这工作正常，但是我不确定这是否是最佳编程实践？是否可以使用自定义事件？

预先感谢

汤姆的任何帮助

原文

I need some advice please on the best way to achieve a particular outcome...

My scenario...

I have a Form1 class, which is my main Form with a picture box on it.

I have a second class called camera that using an event handler grabs a frame (bitmap) from my webcam.

I then want to pass this frame to the picture box in the main form in the best fashion.

At the moment in the main form I have the code:

public static void setPB(Bitmap image) 
{

var form = Form.ActiveForm as Form1;
form.pbWebCamDisplay = image;

}

then in the Camera class I use

Form1.setPB(currentFrame);

This works fine, however I wasn't sure if this was best programming practice? Is it possible to use custom events?

Thanks in advance for any help

Tom

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独夜无伴 2024-09-25 00:49:25

我将在 Camera 类上创建一个方法，该方法拍摄照片并返回 Bitmap 对象。

因此，在按钮的 OnLoad 或 OnClick 中，调用该方法并将返回值设置为 PictureBox...

var picture = new Camera().TakePicture();
myPictureBox.Image = picture;

类似的东西:)

编辑：如果 Camera 类是事件驱动的组件（Camera.NewFrame 事件），请尝试:

(在构造函数中):

var camera = new Camera();
camera.OnNewFrame += new OnNewFrameEventHandler(MyEventHandler);

(事件处理程序)

public void MyEnventHandler(EventArgs comingFromComponent)
{
   var image = comingFromComponent.Frame; // (hopefully this is the case :))
   myPictureBox.Image = image;
}

I would create a method on the Camera class, which takes the picture and returns a Bitmap object.

So in the OnLoad or in the OnClick of a button, call that method and set the return value to the PictureBox...

var picture = new Camera().TakePicture();
myPictureBox.Image = picture;

Something like that :)

Edit: If the Camera class is an Event driven component (Camera.NewFrame event), try:

(in the constructor):

var camera = new Camera();
camera.OnNewFrame += new OnNewFrameEventHandler(MyEventHandler);

(event handler)

public void MyEnventHandler(EventArgs comingFromComponent)
{
   var image = comingFromComponent.Frame; // (hopefully this is the case :))
   myPictureBox.Image = image;
}

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