How can I change window form size at runtime?
I saw examples, but every one requires Form.Size property. This property can be set like here: http://msdn.microsoft.com/en-us/library/25w4thew.aspx#Y456, but I've created my application form in a visual tool and the form is created like this:
static void Main()
{
Application.Run(new Form());
}
How do I set that Size
property now and then change it by the Form.Height
and Form.Width
methods?
As a complement to the answers given above; do not forget about Form MinimumSize Property, in case you require to create smaller Forms.
Example Bellow:
private void SetDefaultWindowSize()
{
int sizeW, sizeH;
sizeW = 180;
sizeH = 100;
var size = new Size(sizeW, sizeH);
Size = size;
MinimumSize = size;
}
private void SetNewSize()
{
Size = new Size(Width, 10);
}
You can change the height of a form by doing the following where you want to change the size (substitute '10' for your size):
this.Height = 10;
This can be done with the width as well:
this.Width = 10;
In order to call this you will have to store a reference to your form and pass the reference to the run method. Then you can call this in an actionhandler.
public partial class Form1 : Form
{
public void ChangeSize(int width, int height)
{
this.Size = new Size(width, height);
}
}
You cannot change the Width and Height properties of the Form as they are readonly. You can change the form's size like this:
button1_Click(object sender, EventArgs e)
{
// This will change the Form's Width and Height, respectively.
this.Size = new Size(420, 200);
}
Something like this works fine for me:
public partial class Form1 : Form
{
Form mainFormHandler;
...
}
private void Form1_Load(object sender, EventArgs e){
mainFormHandler = Application.OpenForms[0];
//or instead use this one:
//mainFormHandler = Application.OpenForms["Form1"];
}
Then you can change the size as below:
mainFormHandler.Width = 600;
mainFormHandler.Height= 400;
or
mainFormHandler.Size = new Size(600, 400);
Another useful point is that if you want to change the size of mainForm
from another Form
, you can simply use Property to set the size.
Source: Stackoverflow.com