Dynamically add form and button that uses the properties of form in C#

Question

I want to create a form dynamically and than add a new button to form(also dynamically). now I want to write code on button click event , how I can use form properties. (It generates scope issue. ), should I declare my form as public...? [code of program ][1]

    private void button3_Click(object sender, EventArgs e)
    {
         Form myform = new Form();
        myform.Show();
        myform.Text = "New Dynamic Window";
        Button hide = new Button();
        hide.Text = "Hide";
        hide.Show();
        hide.Location = new Point(50, 50);
        hide.Click += hide_Click;
        myform.Controls.Add(hide);
    }

    void hide_Click(object sender, EventArgs e)
    {

                   // myform.Hide();

    }

when I write myform.Hide(); in my click event of button it generates error.

coul you please post your code ? instead of image.

Sudhakar Tillapudi
– Sudhakar Tillapudi

2013-12-24 06:38:57 +00:00
Commented Dec 24, 2013 at 6:38 — Sudhakar Tillapudi
– Sudhakar Tillapudi, Commented Dec 24, 2013 at 6:38
I write code kindly check...

Allah Rakha
– Allah Rakha

2013-12-24 06:41:23 +00:00
Commented Dec 24, 2013 at 6:41 — Allah Rakha
– Allah Rakha, Commented Dec 24, 2013 at 6:41
YOu have to declare myForm outsite the button3_click event

Rad
– Rad

2013-12-24 06:45:53 +00:00
Commented Dec 24, 2013 at 6:45 — Rad
– Rad, Commented Dec 24, 2013 at 6:45

Alexander Galkin · Accepted Answer · 2013-12-24 06:51:07Z

2

In your event handler you have access to the sender parameter. You can use this parameter to access the parent form. Here is the sample code:

  void hide_Click(object sender, EventArgs e)
    {

         ((sender as Button).Parent as Form).Hide();

    }

answered Dec 24, 2013 at 6:51

Alexander Galkin

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Comments

Mark Hall · Accepted Answer · 2013-12-24 06:59:57Z

You are creating your myForm in your click event. The variable has method level scope. Try declaring it as a class scoped variable and new it up in your click event.

 Form myform; //Notice that I have removed your declaration from your click event
              //this variable now has visibility throughout the entire class.

private void button3_Click(object sender, EventArgs e)
{
    myForm = new Form();  // I have instantiated it here
    myform.Show();
    myform.Text = "New Dynamic Window";
    Button hide = new Button();
    hide.Text = "Hide";
    hide.Show();
    hide.Location = new Point(50, 50);
    hide.Click += hide_Click;
    myform.Controls.Add(hide);
}

void hide_Click(object sender, EventArgs e)
{

               // myform.Hide();

}

Or You can leave it the way you have it and cast the sender object in your hide_Click event to a Button since it is the object the originated the event and its parent is the Form you can then cast it to Form then call its Hide method.

void hide_Click(object sender, EventArgs e)
{
    ((Form)((Button)sender).Parent).Hide();
}

Tony · Accepted Answer · 2013-12-24 07:00:30Z

2

Try this:

void hide_Click(object sender, EventArgs e)
{
     ((Control)sender).FindForm().Hide();
}

answered Dec 24, 2013 at 7:00

Tony

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Comments

Pouya Samie · Accepted Answer · 2013-12-24 07:02:57Z

0

Your form is not accessible in Button click . you should declare your form as a class member.

answered Dec 24, 2013 at 7:02

Pouya Samie

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