Example of C# delegate/event to pass data from one form to another

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
  public partial class Form1 : Form
  {
    private Form2 Frm2 = new Form2();

    public Form1()
    {
      InitializeComponent();
      Frm2.AdviseParent += new Form2.AdviseParentEventHandler(SetFromForm2);
    }

    private void button1_Click(object sender, EventArgs e)
    {
      Frm2.ShowDialog();
    }


    public void SetFromForm2(string label)
    {
      label1.Text = label;
    }

  }
}


//Form 2

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
  public partial class Form2 : Form
  {
    public delegate void AdviseParentEventHandler(string text);
    public event AdviseParentEventHandler AdviseParent;

    public Form2()
    {
      InitializeComponent();
    }

    private void button1_Click(object sender, EventArgs e)
    {
      SetLabelOnForm1(textBox1.Text);
    }

    public void SetLabelOnForm1(string label)
    {
      if (AdviseParent != null)
        AdviseParent(label);
    }
  }
}

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Windows.Forms;

namespace WindowsFormsApplication1

{

public partial class Form1 : Form

{

private Form2 Frm2 = new Form2();

public Form1()

{

InitializeComponent();

Frm2.AdviseParent += new Form2.AdviseParentEventHandler(SetFromForm2);

}

private void button1_Click(object sender, EventArgs e)

{

Frm2.ShowDialog();

}

public void SetFromForm2(string label)

{

label1.Text = label;

}

//Form 2

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Windows.Forms;

namespace WindowsFormsApplication1

{

public partial class Form2 : Form

{

public delegate void AdviseParentEventHandler(string text);

public event AdviseParentEventHandler AdviseParent;

public Form2()

{

InitializeComponent();

}

private void button1_Click(object sender, EventArgs e)

{

SetLabelOnForm1(textBox1.Text);

}

public void SetLabelOnForm1(string label)

{

if (AdviseParent != null)

AdviseParent(label);

}

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Example of C# delegate/event to pass data from one form to another