Want a label to the background color, in accordance with the order of the Bai Honglan each click a switch, code, and didn't think

CodePudding user response:

Novice ah, that we will not introduce you to what MVVM, data binding, a state machine class of senior stuff, global variables are not out, even in the click event once get the

 private void button1_Click (object sender, EventArgs e) 
{
The object tag=for. The tag; 
int i=0; 
If (tag!=null) 
{
I=(int) tag; 
I=(I + 1) % 3. 

} 

The switch (I) 
{
Case 0: 
For the BackColor=Color. White; 
break; 
Case 1: 
For the BackColor=Color. Red; 
break; 
Case 2: 
For the BackColor=Color. Blue; 
break; 
Default: 
break; 
} 

For the. Tag=I; 

}