Question

Lets say I have two forms ( Form1 And Form2 ).

• Form1 has a PictureBox
• Form2 I has an OpenFileDialog

Form1 is the main form, so when I run the project I see Form1.

How can I change the Image in the PictureBox in Form1 from Form2?

Answer 1

You can very simply do this.
At first change your code(in Form1) that show Form2 to looks like this:

<variable-of-type-Form2>.ShowDialog(this);

or if you dont want form2 to be modal

<variable-of-type-Form2>.Show(this);

Next when you got path to image, you can access pictureBox like this

((PictureBox)this.Owner.Controls["pictureBox1"]).Image=Image.FromFile(<filename>);

Assume that you have PictureBox on Form1 with name “pictureBox1”