C#WinForms中限制文本框隻能輸入數字

給指定TextBox添加KeyPress事件：

代碼如下：

private void txtPrice_KeyPress(object sender, KeyPressEventArgs e)         {             if (e.KeyChar ==(char)8)             {                 return;             }             if (e.KeyChar > (char)47 && e.KeyChar < (char)58)             {                 e.Handled = false;             }             else             {                 e.Handled = true;             }         }