For converting key input

CodePudding user response:

Implementation is as follows:

 
Double c=0, f; 
Try//test input errors against an exception is thrown, but instead of regular, 
{c=the Convert. ToDouble (textBox1. Text. The ToString ()); }//Convert conversion function, easy and convenient to use 
The catch (Exception) 
{
TextBox1. The Clear (); 
Label2. Text="please enter a number!" ; 
Label2. Visible=true; 
return;//must be returned, otherwise will still perform the following code 
}; 
F=1.8 * c + 32;//Celsius to Fahrenheit formula 
Label2. Text="c" + c + "degrees into degrees Fahrenheit is:" + f; 
Label2. Visible=true; 

On the button1_Click click event,