how to remove a user control from a flowloayout

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hello friends.
this is my question.
i have a form and a user control and a flowlayoutpanel.
i have a button on the form to name of "add".
As you see i have a button on user control.it S name is del.

http://upload7.ir/viewer.php?file=30884462722471978649.jpg[^]
when i click add button_ one user control add to my flowlayoutpanel and so on.
i want that when i click on delete button on user control _the same user control remove from
my flowlayoutpanel and so on.
this is my code for delete and add button.
add:this work fine.

C#

int counter;
      private void button1_Click(object sender, EventArgs e)
      {
          counter++;
          if (counter == 10) { counter = 0; }
          UserControl1 btnAdd = new UserControl1();

        //  this.Text = counter.ToString();
          // btnAdd.Name = "click" + counter.ToString();
          btnAdd.Name = "usercontrol" + counter.ToString();
          btnAdd.button1.Name = "click";

         // btnAdd.Click += new EventHandler(btnAdd_Click);
          btnAdd.button1.Click += new EventHandler(btnAdd_Click);
          btnAdd.button1.BackColor = Color.Gray;
          btnAdd.button1.Text = "Add";

          //  btnAdd.Location = new System.Drawing.Point(20, 20);

          flowLayoutPanel1.Controls.Add(btnAdd);
      }

delete:this dont work.

C#

private void button1_Click(object sender, EventArgs e)
       {
           UserControl1 btn = new UserControl1();

          // Button btn = (Button)sender;
           Form4 hh=new Form4();
           // Form4 gg = new Form4();
           if (btn != null)
           {
           hh.flowLayoutPanel1.Controls.RemoveByKey(btn.Name);
              // flowLayoutPanel1.Controls.RemoveByKey(btn.Name);
           this.Text = (btn.Name + " removeded");
           }

       }

Posted 24-Apr-13 20:13pm

mahmoodof

Updated 24-Apr-13 20:51pm

Maciej Los

v2

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toATwork · Accepted Answer · 2013-04-24T20:57:00

Solution 1

I think I know why this does not work. You tried to remove the delete button from the flowlayout. But you want to remove the UserControl1 from the flowlayout.
Try something like:

C#

private void button1_Click(object sender, EventArgs e)
{
	Button btn = sender as Button;
	if (btn != null)
	{
		flowLayoutPanel1.Controls.RemoveByKey(btn.Parent.Name);
		this.Text = (btn.Name + " removeded");
	}
}

Or if the delete button is in a panel you might need "Parent.Parent.Name" - and so on. I think the RemoveByKey is not recursive!

EDIT:
And of course you need to change your event registering from:

C#

btnAdd.button1.Click += new EventHandler(btnAdd_Click);

to

C#

btnAdd.button1.Click += new EventHandler(button1_Click);

otherwise you will recursivly add controls to your flowpanel.

Posted 24-Apr-13 20:57pm

toATwork

Updated 24-Apr-13 21:05pm

v2

Comments

mahmoodof 25-Apr-13 3:33am

thanks alot.it work fine.
one another question.
if i want have a ADD button on my user control not on my form.
how change does my code make?

toATwork 25-Apr-13 3:36am

You have 2 possibilites. Either handle the add in your control and add a new UserControl1 to the (parent) flowpanel there. Or call the add functionality from the main form.

mahmoodof 25-Apr-13 3:44am

ok.but how i handle addbutton in my control .
i am new in c#.
do you have a sample for me.
thanks.

toATwork 25-Apr-13 4:31am

Sample is rather difficult.
You could change the constructor of your UserControl1 that it requieres a variable with the type of your parent control.
In your parent control define a public method which handles all the adding of new controls.
Then you can simply call in your control the function of the main (parent) control.