C# - How to Resize my form size with CheckBox

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I have a problem

I want to increase my form size
so i created a Checkbox to decide Increase/Decrease the size

here is the code

private void ExtandedColorBox(object sender, EventArgs e)
{
      CheckBox CheckBox1 = new CheckBox();      //--> CheckBox1=name of the form
      CheckBox1.Checked = true;

     if (CheckBox1.Checked == true)
     {
         this.MaximumSize = new Size(300, 303); //--> this=Form
         this.Size = new Size(300, 303);
     }

     if (CheckBox1.Checked == false)
     {
         this.MaximumSize = new Size(300, 280);
         this.Size = new Size(300, 280);
     }
}

when i check then the form getting increased but when i check again it's does'nt getting decreased

[edit]Code block added - OriginalGriff[/edit]
because the status of the Checkbox never getting changed to False

Please help :-)

Posted 9-Jul-11 3:30am

Eddie1987

Updated 9-Jul-11 3:51am

v3

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Sergey Alexandrovich Kryukov 10-Jul-11 2:36am

Tag it: Forms.
--SA

1 solution

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OriginalGriff · Accepted Answer · 2011-07-09T03:51:00

That's because you keep on creating a new checkbox - which does nothing useful for you.
Every time into the method, you create a new checkbox, and give set it's "Checked" property to True. So when you test it to see what you should be doing with teh form size, you always get "Checked" equals True, so you always set the size to 300 by 303.

Instead, delete the

CheckBox CheckBox1 = new CheckBox();
CheckBox1.Checked = true;

lines, and replace CheckBox1 with the name of the actual CheckBox on your form (probably checkBox1, but you may have changed it):

private void ExtandedColorBox(object sender, EventArgs e)
{
     if (checkBox1.Checked)
     {
         this.MaximumSize = new Size(300, 303); //--> this=Form
         this.Size = new Size(300, 303);
     }
     else
     {
         this.MaximumSize = new Size(300, 280);
         this.Size = new Size(300, 280);
     }
}

In addition, you don't need to check for false explicitly - if it isn't true then it is false: I have altered your code to be neater!

BTW: you don't need to keep typing this. either - it is implied in all non-static class methods:

private void ExtandedColorBox(object sender, EventArgs e)
{
     if (checkBox1.Checked)
     {
         MaximumSize = new Size(300, 303);
         Size = new Size(300, 303);
     }
     else
     {
         MaximumSize = new Size(300, 280);
         Size = new Size(300, 280);
     }
}