A new delegate program! Objective To consolidate! Delegate usage!

The Code is as follows: Public Delegate void selectlable (string E );
Public partial class form1: Form
{
Public form1 ()
{
Initializecomponent ();
Checkbox1.enabled = false;
Checkbox2.enabled = false;
Checkbox3.enabled = false;
If (STR = "")
{
Label1.text = "enter a string! ";
}
}
Public String STR {get {return textbox1.text. tostring () ;}set {STR = value ;}}

Private void button#click (Object sender, eventargs E)
{
If (checkbox1.checked = true & checkbox2.checked = false & checkbox3.checked = false)
{
Label1.forecolor = system. Drawing. color. Red;
}
Else if (checkbox1.checked = false & checkbox2.checked = true & checkbox3.checked = false)
{
Label1.forecolor = system. Drawing. color. Green;
}
Else if (checkbox1.checked = false & checkbox2.checked = false & checkbox3.checked = true)
{
Label1.forecolor = system. Drawing. color. Black;
}
Else
{
Label1.text = STR;
}
}
Public event selectlable onselectlable;
Private void radiobutton1_checkedchanged (Object sender, eventargs E)
{
Try
{
Checkbox1.checked = radiobutton1.checked;
Checkbox2.checked = false;
Checkbox3.checked = false;
If (radiobutton1! = NULL)
{
Onselectlable (radiobutton1.checked. tostring ());
}
}
Catch {
Label1.text = STR;
}
}

Private void radiobutton2_checkedchanged (Object sender, eventargs E)
{
Try
{
Checkbox1.checked = false;
Checkbox2.checked = radiobutton2.checked;
Checkbox3.checked = false;
If (radiobutton2! = NULL)
{
Onselectlable (radiobutton2.checked. tostring ());
}
}
Catch {
Label1.text = STR;
}

}

Private void radiobutton3_checkedchanged (Object sender, eventargs E)
{
Try
{
Checkbox1.checked = false;
Checkbox2.checked = false;
Checkbox3.checked = radiobutton3.checked;
If (radiobutton3! = NULL)
{
Onselectlable (radiobutton3.checked. tostring ());
}
}
Catch {
Label1.text = STR;
}

}

Private void button2_click (Object sender, eventargs E)
{
Try
{
Radiobutton1.checked = false;
Radiobutton2.checked = false;
Radiobutton3.checked = false;

}
Catch
{
STR = "data has been cleared! ";
Label1.text = STR;
}
}
}

 

The interface is as follows:

 

 

When you click Cancel, you will find that you do not need to repeatedly write the checkbox status, but directly write radiobutton to clear it! The input box is not cleared. Sorry ~ Haha ~ But it's good!

The function of the delegate function is that when the following radiobutton is selected, the above checkbox will be moved. Maybe you will say, Who is checkbox1.checked = true in radiobutton;
Checkbox2.checked = false;
Checkbox3.checked = false;

Why checkbox1.checked = false;
Checkbox2.checked = false;
Checkbox3.checked = radiobutton3.checked;
If (radiobutton3! = NULL)
{
Onselectlable (radiobutton3.checked. tostring ());
}

And handle exceptions! It's troublesome. Wait, friend. You will come back to write me when you call this function. This is the benefit of writing your own time and calling the delegate function. If there are too many, I will not explain it!