C#textbox1(小数,如1.5)乘以textbox2（整数,如2）等于textbox3

Question

C# textbox1 (小数,如1.5)乘以textbox2（整数,如2）等于textbox3

Answer 1

try
{
textbox3.text=((double)textbox1.text)*((double)textbox2.text)).tostring();
}
catch(exception ex)
{
//throw new exception(ex.message);
//做某事 ,如提示用户 输入有错误
}