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[WinForm] Delegate values between Winform forms

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Posted on 12/28/2015 12:27:20 PM | | | |
The first form (which is the main form):

  1. using System;
  2. using System.Collections.Generic;
  3. using System.ComponentModel;
  4. using System.Data;
  5. using System.Drawing;
  6. using System.Linq;
  7. using System.Text;
  8. using System.Windows.Forms;

  10. namespace winformDelegate
  11. {
  12.     public partial class Form1 : Form
  13.     {
  14.         public Form1()
  15.         {
  16.             InitializeComponent();
  17.         }

  19.         private void button1_Click(object sender, EventArgs e)
  20.         {
  21.            Form2 frm=new Form2();
  22.            frm.Myevent += GetValue;
  23.             frm.Show();
  24.         }

  26.         public void GetValue(string text)
  27.         {
  28.             textBox1.Text = text;
  29.         }
  30.     }
  31. }
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Second form:
  1. using System;
  2. using System.Collections.Generic;
  3. using System.ComponentModel;
  4. using System.Data;
  5. using System.Drawing;
  6. using System.Linq;
  7. using System.Text;
  8. using System.Windows.Forms;

  10. namespace winformDelegate
  11. {
  12.     public partial class Form2 : Form
  13.     {
  14.         public delegate void DelegaeValue
  15.             (string text);

  17.         public event DelegaeValue Myevent;

  19.         protected virtual void ValueInformation(string text)
  20.         {
  21.             DelegaeValue handler = Myevent;
  22.             if (handler != null)
  23.                 handler(text);
  24.         }

  26.         public Form2()
  27.         {
  28.             InitializeComponent();
  29.         }

  31.         private void button1_Click(object sender, EventArgs e)
  32.         {
  33.             if (Myevent != null)
  34.             {
  35.             }
  36.             ValueInformation(textBox1.Text);
  37.         }


  40.     }
  41. }
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Related Posts
 Landlord| Posted on 8/17/2017 11:28:12 AM |


You can pass value without delegation

Form 1 code:



Form 2 code:



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