如何将图像从Form1分配给Form2 Picturebox

Question

I am creating Image editor using C# Windows application, and now I have problem to assign a image to Form2 picturebox from Form1.

I am trying shown below code
The below code is written in Form1.cs page

    if(flag==0)
    {
        Form2 f2 = new Form2(glb_image_list_arr[0]);
        f2.Show();                
    }

And the below code is written in Form2.cs page

public Form2()
{
    InitializeComponent();
}

public Form2(Image img)
{
    this.Show();
    this.pictureBox1.Image = img;
}

In the " this.pictureBox1.Image = img; " line, I got the following error " An unhandled exception of type 'System.NullReferenceException "

Answer 1

You are missing InitializeComponents() method call in Form2(Image img) constructor use

public Form2()
{
    InitializeComponent();
}

public Form2(Image img)
{
    InitializeComponent();
    this.pictureBox1.Image = img;
}

will work.