控制C#中的文本输入只能是数字类型

 

privatevoid NumberAccpter(object sender, KeyPressEventArgs e)
        {
            int keyValue = (int)e.KeyChar;
            if ((keyValue >=48&& keyValue <=57) || keyValue ==8|| keyValue ==46)
            {
                if (sender !=null&& sender is TextBox && keyValue ==46)
                {
                    if (((TextBox)sender).Text.IndexOf(".") >=0)
                        e.Handled =true;
                    else
                        e.Handled =false;
                }
                else
                    e.Handled =false;
            }
            else
                e.Handled =true;
        }