Control

[ImanMahmoud]

i want, form another form, and at a specified condition, to create an object from a certain control and add it to the first form, like :

namespace Win
{
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.Button button1 = new Button();
private System.Windows.Forms.Button button2 = new Button();
public System.Windows.Forms.Panel panel1;

	public Form1()
	{
		InitializeComponent();
	}

	static void Main() 
	{
		Application.Run(new Form1());
	}

	private void button1\_Click(object sender, System.EventArgs e)
	{
		this.Close();
	}

	private void button2\_Click(object sender, System.EventArgs e)
	{
		Form2 f2 = new Form2();
		f2.Show();
	}
}// Form1

public class Form2 : System.Windows.Forms.Form
{
	private System.Windows.Forms.Button button1 = new Button() ;

	public Form2()
	{
		InitializeComponent();
	}

	private void button1\_Click(object sender, System.EventArgs e)
	{
		// at a specified condition :

		Button b = new Button();
		b.Text = "Hello" ;
		Form1 f1 = new Form1();
		f1.panel1.Controls.Add(b);
	}

}// Form2

}// namespace Win

this code does not work. What is the wrong here ? thanks

[Charlie Williams]

In Form2.button1_Click you're creating a new instance of Form1, adding a Button to its panel1 control and... well, that's it. f1 is going the way of the dodo bird when the method exits. What I think you're trying to do is add the Button to the instance of Form1 that called Form2.Show in the first place. You'll need a reference to that object in Form2. You can pass it in Form2's constructor or as a property. Here's an example:

public class Form2 : Form
{
Form1 _form1;
public Form2(Form1 form1)
{
_form1 = form1;
}

private void button1_Click(object sender, EventArgs e)
{
// create button as before
_form1.panel1.Controls.Add(b);
}

// rest of class
}

public class Form1 : Form
{
private void button2_Click(object sender, System.EventArgs e)
{
Form2 f2 = new Form2(this);
f2.Show();
}

// rest of class
}

Charlie if(!curlies){ return; }

[WillemM]

ImanMahmoud wrote: public Form1() { InitializeComponent(); } I don't see the method InitializeComponent. Either create it, or get rid of this line :) "Every rule in a world of bits and bytes can be bend or eventually be broken"