Question

C#GUI窗口中，怎么把第一个窗口中的picture Box图片传到另一个窗口From2中。

Answer 1

可通过如下3种方法，供你参考。
1. 通过设立公共变量访问
从 Form1 传到 Form3

public class Common
{
public static Image MyImage;
}
//Form1
public partial class Form1 : Form
{

private void button1_Click(object sender, EventArgs e)
{
Form3 frm3 = new Form3();
Common.MyImage = this.pictureBox1.Image;
frm3.Show();
}
}
//Form3
public partial class Form3 : Form
{
private void Form3_Load(object sender, EventArgs e)
{

if (Common.MyImage != null)
{
this.pictureBox1.Image = Common.MyImage;
}
}
}

2.通过窗体类的属性传递
从 Form1 传到 Form3
//Form1
public partial class Form1 : Form
{

private void button1_Click(object sender, EventArgs e)
{
Form3 frm3 = new Form3();
frm3.MyImage = this.pictureBox1.Image;
frm3.Show();
}
}
//Form3
public partial class Form3 : Form
{
public Image MyImage { get; set; }

private void Form3_Load(object sender, EventArgs e)
{
if (MyImage != null)
{
this.pictureBox1.Image = MyImage;

}

｝ ｝
3.通过委托与事件触发传递
从 Form3 通过事件触发传到 Form1
public delegate void PassInfoDelegate(Image myImage);
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

private void button1_Click(object sender, EventArgs e)
{
Form3 frm3 = new Form3();

frm3.FireInfoEvent += frm3_FireInfoEvent;

frm3.Show();
}

void frm3_FireInfoEvent(Image myImage)
{
if (this.IsHandleCreated)
{
this.BeginInvoke(new PassInfoDelegate(ShowInfo), new object[] { myImage });
}
}

private void ShowInfo(Image myImage)
{
this.pictureBox1.Image = myImage;
}
}

public partial class Form3 : Form
{
public Form3()
{
InitializeComponent();
}
public event PassInfoDelegate FireInfoEvent;

private void button1_Click(object sender, EventArgs e)
{

PassInfo(this.pictureBox1.Image );

}
private void PassInfo(Image myImage)
{
if (FireInfoEvent != null)
{
FireInfoEvent(myImage);
}
}
｝

当然还有其他的方法，如通过窗体的构造函数进行传递等。