Change width of a Windows Forms form at runtime

Question

I want to change width of a Windows Forms form at runtime. I am also executing SuspendLayout and resumelayout method, but it doesn't work.

  System.Windows.Forms.Control form = this.currentForm;
  form.SuspendLayout();
  form.Width = form.Width + 100;
  form.ResumeLayout();

How can I make it work?

http://msdn.microsoft.com/en-us/library/aa984427(v=vs.71).aspx — prospector, Jul 12 '13 at 05:13
In which context do you use the above code? Please show more. What is `this` and what is `this.currentForm`? — joe, Jul 12 '13 at 05:30
Related: *[How do I resize a Windows Forms form in C#?](http://stackoverflow.com/questions/12682506)* — Peter Mortensen, May 12 '17 at 12:31

score 3 · Answer 1 · answered Jul 12 '13 at 05:31

Set the size of form like this

Form1.Size = new System.Drawing.Size(100, 100);

or

Form1.Size = new System.Drawing.Size(100, Form1.Size.Height);

Once the Size has been defined, you can change Form size like this

Form1.Width += 200;

score 2 · Answer 2 · answered Jul 12 '13 at 05:29

2

form.Size = new Size(form.Size.Width + 100, form.Size.Height);

answered Jul 12 '13 at 05:29

John Smith

score 0 · Answer 3 · answered Jul 12 '13 at 05:16

0

Obviously, replace "Form1" with your form name. It's this easy:

Form1.ActiveForm.Width += 100;

answered Jul 12 '13 at 05:16

prospector

1

Are you sure it's different than `form.Width = form.Width + 100;` ? .. and how if it's not activeform ? – matzone Jul 12 '13 at 07:33

3 Answers3