C#写计算器,键盘keypress关联鼠标click点击事件,只响应数字按键,无法响应加,减,乘,除,小数点按键.该如何解决

C#写计算器,键盘keypress关联鼠标click点击事件,只响应数字按键,无法响应加,减,乘,除,小数点按键.
C#写计算器,键盘keypress关联鼠标click点击事件,只响应数字按键,无法响应加,减,乘,除,小数点按键.
我重载了button1_Click(sender, e,inputText)和buttonAdd_Click(sender, e,inputText)事件,以获取所按键字符,
数字按键和小数点按键都调用button1_Click()
运算符号调用buttonAdd_Click()
求大大给出详细原因,部分代码如下:

C# code

private void Form1_KeyPress(object sender, KeyPressEventArgs e)        {             switch ((Keys)e.KeyChar)            {                   case Keys.Add:                    case Keys.Subtract:                case Keys.Multiply:                case Keys.Divide:                     inputText = e.KeyChar.ToString();                     buttonAdd_Click(sender, e, inputText);                     break;                case Keys.D1:                case Keys.D2:                case Keys.D3:                case Keys.D4:                case Keys.D5:                case Keys.D6:                case Keys.D7:                case Keys.D8:                case Keys.D9:                case Keys.D0:                case Keys.Decimal:                    inputText = e.KeyChar.ToString();                    button1_Click(sender, e,inputText);                    break;                         }                 }