Updating a picture box in one class from a different class.

tomprice0189 · #1 09-08-2010, 01:55 PM

Hi all,

So here is my situation:

2 classes

1st class is a windows form created in VS2008. It has a picture box on it which i want to update with images.

2nd class is a custom class called 'camera' which uses the AForge.Net framework to grab images from my webcam. The important part is that there is an event handler that fires everytime a new frame is got from the webcam and creates a bitmap.

So... I need some advice on the best way of updating the picturebox in the form class with the latest frame in the camera class..

At the moment I have a set method in the form class like so...

public static void setPB(Bitmap image)
{

var form = Forms.ActiveForm as Form1;
form.PictureBox.Image = image

}

this method is then called in the newframe event handler within the camera class.

This code works fine however I would like to know if this is the best way to attack the problem?

The other way I thought of doing it was when i create an object of the camera class, to pass my form as a parameter so that I can set the picturebox image from within the camera class itself.

Please note: i only have 1 thread at the moment.

Thanks in advance, much appreciated.

Tom

techforum4u · #2 11-30-2010, 10:07 PM

This can be achieved with the use of "Interform Control Access"...
let me give u an example:-

Code:

public partial class Form1 : Form
      {
          public Form1()
          {
              InitializeComponent();
          }
   
          private void Form1_Load(object sender, EventArgs e)
          {
              Form2 frm2 = new Form2(this); //pass reference to this form in constructor
          }
           
    }


      public partial class Form2 : Form
      {
          Form1 frm1;
          public Form2(Form1 callingForm)
          {
              InitializeComponent();
              frm1 = callingForm;  //store local reference to Form1
          }
   
          private void Form2_Load(object sender, EventArgs e)
          {
              frm1.picturebox.Image=”path”;
          }
      }

Let me know for any concerns...