[Balloon] winform in use Help.ShowPopup () do prompt box information

When do winform development, commonly used MessageBox.Show("Test");to make prompt box, with a lot of inconvenience for authentication information when prompted.
Try Help.ShowPopup()to make a prompt box prompt box in imitation web
effect is shown

first look at methods

//
// 摘要:
//     显示帮助的弹出窗口。
//
// 参数:
//   parent:
//     一个 System.Windows.Forms.Control 标识帮助对话框中的父级。
//
//   caption:
//     要在弹出窗口中显示的消息。
//
//   location:
//     一个值，指定要显示弹出窗口中的，相对于屏幕左上角的水平和垂直坐标。
public static void ShowPopup(Control parent, string caption, Point location);

Very simple, a parent Control, a stringmessage, a Pointis the coordinate of
the first two did not say, focus on the coordinates of the acquisition, the above locationcomments face, we know that this Pointis a relative of the screen, so we get parentthe coordinates relative to the container,

then converted into screen coordinates on the line

//上面视图中，TextBox为txt_IP，Button为btn_Connect
//实现上面的效果具体如下

/// <summary>
/// 连接
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Btn_Connect_Click(object sender, EventArgs e)
{
    if (!IPAddress.TryParse(txt_IP.Text.Trim(), out IPAddress iP)) 
    {
        Help.ShowPopup(txt_IP, "请检查IP地址格式", PointToScreen(txt_IP.Location));
        return;
    }

    MessageBox.Show("连接成功");
}

Get tips above should be like this

so we have to control this position based on Sizeadjustments to
where we split into 9 position, as shown

position enum class

/// <summary>
/// 显示位置
/// </summary>
public enum ShowPosition
{
    /// <summary>
    /// 上左
    /// </summary>
    Top_Left,
    /// <summary>
    /// 上中
    /// </summary>
    Top_Mid,
    /// <summary>
    /// 上右
    /// </summary>
    Top_Right,
    /// <summary>
    /// 中左
    /// </summary>
    Mid_Left,
    /// <summary>
    /// 中中
    /// </summary>
    Mid_Mid,
    /// <summary>
    /// 中右
    /// </summary>
    Mid_Right,
    /// <summary>
    /// 底左
    /// </summary>
    Bottom_Left,
    /// <summary>
    /// 底中
    /// </summary>
    Bottom_Mid,
    /// <summary>
    /// 底右
    /// </summary>
    Bottom_Right
}

Write an extension method easy to use

/// <summary>
/// 提示框
/// </summary>
/// <param name="form"></param>
/// <param name="hint"></param>
public static void Hint(this Form form, Control control, string hint, ShowPosition position = ShowPosition.Bottom_Right)
{
    Point point;

    switch (position)
    {
        case ShowPosition.Top_Left:
            point = new Point
            {
                X = control.Location.X,
                Y = control.Location.Y
            };
            break;
        case ShowPosition.Top_Mid:
            point = new Point
            {
                X = control.Location.X + control.Size.Width / 2,
                Y = control.Location.Y
            };
            break;
        case ShowPosition.Top_Right:
            point = new Point
            {
                X = control.Location.X + control.Size.Width,
                Y = control.Location.Y
            };
            break;
        case ShowPosition.Mid_Left:
            point = new Point
            {
                X = control.Location.X,
                Y = control.Location.Y + control.Size.Height / 2
            };
            break;
        case ShowPosition.Mid_Mid:
            point = new Point
            {
                X = control.Location.X + control.Size.Width / 2,
                Y = control.Location.Y + control.Size.Height / 2
            };
            break;
        case ShowPosition.Mid_Right:
            point = new Point
            {
                X = control.Location.X + control.Size.Width,
                Y = control.Location.Y + control.Size.Height / 2
            };
            break;
        case ShowPosition.Bottom_Left:
            point = new Point
            {
                X = control.Location.X,
                Y = control.Location.Y + control.Size.Height
            };
            break;
        case ShowPosition.Bottom_Mid:
            point = new Point
            {
                X = control.Location.X + control.Size.Width / 2,
                Y = control.Location.Y + control.Size.Height
            };
            break;
        case ShowPosition.Bottom_Right:
            point = new Point
            {
                X = control.Location.X + control.Size.Width,
                Y = control.Location.Y + control.Size.Height
            };
            break;
        default:
            point = new Point
            {
                X = control.Location.X + control.Size.Width,
                Y = control.Location.Y + control.Size.Height
            };
            break;
    }

    //提示框
    Help.ShowPopup(control, hint, form.PointToScreen(point));
}

Instructions

this.Hint(txt_IP, "请检查IP地址格式", ShowPosition.Mid_Right);

Note that, ShowPopup only a simultaneous display, consider using environment