Change form size at runtime in C

Question

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

User · Answer

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

User · Answer

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

User · Answer

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

User · Answer

If you want to manipulate the form programmatically the simplest solution is to keep a reference to it   static Form myForm   static void Main         myForm   new Form        Application Run myForm       You can then use that to change the size  or what ever else you want to do  at run time  Though as Arrow points out you can t set the Width and Height directly but have to set the Size property

User · Answer

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

User · Answer

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

[c#] Change form size at runtime in C#

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