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How to invoke a form inside another form task

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-2

In my Windows Form application I have created 2 Forms. In form 1 when I click button1, a new task will start. Inside the task I have created an instance of the form2 and show form2. I am calling the showData Method of Form2.

//Form1
public event TickHandler Tick;
public EventArgs e = null;
public delegate void TickHandler(int a1, EventArgs e);

private void button1_Click(object sender, EventArgs e)

 Task.Factory.StartNew(() =>
 
 Form2 form2 = new Form2();
 form2.Show();
 


//Form2
public void showData(Form1 m)

 m.Tick += new Form1.TickHandler(test);


public void test(int a1,EventArgs e)

 Task.Factory.StartNew(() =>
 
 for (int i = a1; i < 1000; i++)
 
 label1.Invoke(new MethodInvoker(delegate label1.Text = i.ToString(); ));
 
 );

c# task begininvoke

share|improve this question

edited Mar 24 at 11:27

Han

2,34821525

asked Mar 24 at 10:55

RamRam

25212

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Invoke when you do anything on UI elements including new Form2()
  
  – kenny
  Mar 24 at 10:58
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I added Invoke but it showing error message on test method in form2 like this 'Invoke or BeginInvoke cannot be called on a control until the window handle has been created.'
  
  – Ram
  Mar 24 at 11:31
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  move that code to execute on the Loaded event on the form
  
  – kenny
  Mar 24 at 11:34
  
  

  
  
  
  

add a comment | 

-2

In my Windows Form application I have created 2 Forms. In form 1 when I click button1, a new task will start. Inside the task I have created an instance of the form2 and show form2. I am calling the showData Method of Form2.

//Form1
public event TickHandler Tick;
public EventArgs e = null;
public delegate void TickHandler(int a1, EventArgs e);

private void button1_Click(object sender, EventArgs e)

 Task.Factory.StartNew(() =>
 
 Form2 form2 = new Form2();
 form2.Show();
 


//Form2
public void showData(Form1 m)

 m.Tick += new Form1.TickHandler(test);


public void test(int a1,EventArgs e)

 Task.Factory.StartNew(() =>
 
 for (int i = a1; i < 1000; i++)
 
 label1.Invoke(new MethodInvoker(delegate label1.Text = i.ToString(); ));
 
 );

c# task begininvoke

share|improve this question

edited Mar 24 at 11:27

Han

2,34821525

asked Mar 24 at 10:55

RamRam

25212

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Invoke when you do anything on UI elements including new Form2()
  
  – kenny
  Mar 24 at 10:58
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I added Invoke but it showing error message on test method in form2 like this 'Invoke or BeginInvoke cannot be called on a control until the window handle has been created.'
  
  – Ram
  Mar 24 at 11:31
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  move that code to execute on the Loaded event on the form
  
  – kenny
  Mar 24 at 11:34
  
  

  
  
  
  

add a comment | 

In my Windows Form application I have created 2 Forms. In form 1 when I click button1, a new task will start. Inside the task I have created an instance of the form2 and show form2. I am calling the showData Method of Form2.

//Form1
public event TickHandler Tick;
public EventArgs e = null;
public delegate void TickHandler(int a1, EventArgs e);

private void button1_Click(object sender, EventArgs e)

 Task.Factory.StartNew(() =>
 
 Form2 form2 = new Form2();
 form2.Show();
 


//Form2
public void showData(Form1 m)

 m.Tick += new Form1.TickHandler(test);


public void test(int a1,EventArgs e)

 Task.Factory.StartNew(() =>
 
 for (int i = a1; i < 1000; i++)
 
 label1.Invoke(new MethodInvoker(delegate label1.Text = i.ToString(); ));
 
 );

c# task begininvoke

share|improve this question

edited Mar 24 at 11:27

Han

2,34821525

asked Mar 24 at 10:55

RamRam

25212

//Form1
public event TickHandler Tick;
public EventArgs e = null;
public delegate void TickHandler(int a1, EventArgs e);

private void button1_Click(object sender, EventArgs e)

 Task.Factory.StartNew(() =>
 
 Form2 form2 = new Form2();
 form2.Show();
 


//Form2
public void showData(Form1 m)

 m.Tick += new Form1.TickHandler(test);


public void test(int a1,EventArgs e)

 Task.Factory.StartNew(() =>
 
 for (int i = a1; i < 1000; i++)
 
 label1.Invoke(new MethodInvoker(delegate label1.Text = i.ToString(); ));
 
 );

share|improve this question

edited Mar 24 at 11:27

Han

2,34821525

asked Mar 24 at 10:55

RamRam

25212

share|improve this question

edited Mar 24 at 11:27

Han

2,34821525

asked Mar 24 at 10:55

RamRam

25212

edited Mar 24 at 11:27

Han

2,34821525

edited Mar 24 at 11:27

Han

2,34821525

asked Mar 24 at 10:55

RamRam

25212

asked Mar 24 at 10:55

RamRam

25212

1 Answer
1

active

oldest

votes

1

As kenny suggested i have modified the code. now it running how i am expected.

 public partial class Form1 : Form
 

 public Form1()
 
 InitializeComponent();
 
 private void button1_Click(object sender, EventArgs e)
 
 Task.Factory.StartNew(() =>
 
 Action act1 = (() =>
 
 Form2 form2 = new Form2();
 form2.StartPosition = FormStartPosition.CenterParent;
 form2.Show();
 );
 this.BeginInvoke(act1);
 );
 

// FORM2

private void Form2_Load(object sender, EventArgs e)
 
 test(1);
 
 public void test(int a1)
 
 Task.Factory.StartNew(() =>
 
 for (int i = a1; i < 1000; i++)
 
 label1.Invoke(new MethodInvoker(delegate label1.Text = i.ToString(); ));
 
 );
 

Once again thanks Kenny

share|improve this answer

answered Mar 24 at 12:05

RamRam

25212

add a comment | 

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1

As kenny suggested i have modified the code. now it running how i am expected.

 public partial class Form1 : Form
 

 public Form1()
 
 InitializeComponent();
 
 private void button1_Click(object sender, EventArgs e)
 
 Task.Factory.StartNew(() =>
 
 Action act1 = (() =>
 
 Form2 form2 = new Form2();
 form2.StartPosition = FormStartPosition.CenterParent;
 form2.Show();
 );
 this.BeginInvoke(act1);
 );
 

// FORM2

private void Form2_Load(object sender, EventArgs e)
 
 test(1);
 
 public void test(int a1)
 
 Task.Factory.StartNew(() =>
 
 for (int i = a1; i < 1000; i++)
 
 label1.Invoke(new MethodInvoker(delegate label1.Text = i.ToString(); ));
 
 );
 

Once again thanks Kenny

share|improve this answer

answered Mar 24 at 12:05

RamRam

25212

add a comment | 

1

As kenny suggested i have modified the code. now it running how i am expected.

 public partial class Form1 : Form
 

 public Form1()
 
 InitializeComponent();
 
 private void button1_Click(object sender, EventArgs e)
 
 Task.Factory.StartNew(() =>
 
 Action act1 = (() =>
 
 Form2 form2 = new Form2();
 form2.StartPosition = FormStartPosition.CenterParent;
 form2.Show();
 );
 this.BeginInvoke(act1);
 );
 

// FORM2

private void Form2_Load(object sender, EventArgs e)
 
 test(1);
 
 public void test(int a1)
 
 Task.Factory.StartNew(() =>
 
 for (int i = a1; i < 1000; i++)
 
 label1.Invoke(new MethodInvoker(delegate label1.Text = i.ToString(); ));
 
 );
 

Once again thanks Kenny

share|improve this answer

answered Mar 24 at 12:05

RamRam

25212

add a comment | 

As kenny suggested i have modified the code. now it running how i am expected.

 public partial class Form1 : Form
 

 public Form1()
 
 InitializeComponent();
 
 private void button1_Click(object sender, EventArgs e)
 
 Task.Factory.StartNew(() =>
 
 Action act1 = (() =>
 
 Form2 form2 = new Form2();
 form2.StartPosition = FormStartPosition.CenterParent;
 form2.Show();
 );
 this.BeginInvoke(act1);
 );
 

// FORM2

private void Form2_Load(object sender, EventArgs e)
 
 test(1);
 
 public void test(int a1)
 
 Task.Factory.StartNew(() =>
 
 for (int i = a1; i < 1000; i++)
 
 label1.Invoke(new MethodInvoker(delegate label1.Text = i.ToString(); ));
 
 );
 

Once again thanks Kenny

share|improve this answer

answered Mar 24 at 12:05

RamRam

25212

 public partial class Form1 : Form
 

 public Form1()
 
 InitializeComponent();
 
 private void button1_Click(object sender, EventArgs e)
 
 Task.Factory.StartNew(() =>
 
 Action act1 = (() =>
 
 Form2 form2 = new Form2();
 form2.StartPosition = FormStartPosition.CenterParent;
 form2.Show();
 );
 this.BeginInvoke(act1);
 );
 

private void Form2_Load(object sender, EventArgs e)
 
 test(1);
 
 public void test(int a1)
 
 Task.Factory.StartNew(() =>
 
 for (int i = a1; i < 1000; i++)
 
 label1.Invoke(new MethodInvoker(delegate label1.Text = i.ToString(); ));
 
 );
 

share|improve this answer

answered Mar 24 at 12:05

RamRam

25212

answered Mar 24 at 12:05

RamRam

25212

answered Mar 24 at 12:05

RamRam

25212