DoubleInputBox

using System;
using System.Collections.Generic;
using System.Diagnostics.Eventing.Reader;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace DatabankFiller {
    public sealed class CredentialsBox {

        #region Property
        public static Color BackColor { get; set; } = Color.White;
        public static Color ForeColor { get; set; } = Color.Black;
        #endregion

        #region Designer

        private static DialogResult _ShowLoginBox(string message,string title,Bitmap icon,ref string login,ref string password) {
            Form crdBox = new Form();
            crdBox.Text = title;
            crdBox.ShowIcon = false;
            crdBox.MaximizeBox = false;
            crdBox.MinimizeBox = false;
            crdBox.BackColor = BackColor;
            crdBox.ForeColor = ForeColor;
            crdBox.StartPosition = FormStartPosition.CenterScreen;
            crdBox.FormBorderStyle = FormBorderStyle.FixedDialog;

            PictureBox pictureBox = new PictureBox();
            pictureBox.Image = icon;
            pictureBox.Location = new Point(10, 10);
            pictureBox.SizeMode = PictureBoxSizeMode.AutoSize;
            //pictureBox.BorderStyle = BorderStyle.FixedSingle;
            if(pictureBox.Size.Width > 64 || pictureBox.Size.Height > 64) {
                pictureBox.SizeMode = PictureBoxSizeMode.StretchImage;
                pictureBox.Size = new Size(64, 64);
            }
            crdBox.Controls.Add(pictureBox);

            Label lbl = new Label();
            lbl.Text = message;
            int lblWidth = crdBox.ClientSize.Width - icon.Width - 30;
            lbl.MaximumSize = new Size(lblWidth, 500);
            lbl.AutoSize = true;
            //lbl.BorderStyle = BorderStyle.FixedSingle;
            crdBox.Controls.Add(lbl);

            int grpBoxStart = 0;

            if(lbl.Height > icon.Height) {
                //Labelhoehe ist groeßer Iconhoehe
                double labelMid = lbl.Height / 2.0;
                double iconMid = icon.Height / 2.0;
                pictureBox.Location = new Point(10, 10 + (int)(labelMid - iconMid));
                lbl.Location = new Point(pictureBox.Location.X + pictureBox.Width + 10, 10);
                grpBoxStart = lbl.Location.Y + lbl.Height + 10;
            }else if(lbl .Height < icon.Height) {
                //Labelhoehe ist kleiner Iconhoehe
                double labelMid = lbl.Height / 2.0;
                double iconMid = icon.Height / 2.0;
                pictureBox.Location = new Point(10, 10);
                lbl.Location = new Point(pictureBox.Location.X + pictureBox.Width + 10, 10 + (int)(iconMid - labelMid ));
                grpBoxStart = pictureBox.Location.Y + pictureBox.Height + 10;
            } else {
                //Gleich
                pictureBox.Location = new Point(10, 10);
                lbl.Location = new Point(pictureBox.Location.X + pictureBox.Width + 10, 10);
                grpBoxStart = lbl.Location.Y + lbl.Height + 10;
            }

            //GroupBox mit Textboxen und Labels

            GroupBox grpBox = new GroupBox();
            grpBox.Text = "Login";
            grpBox.ForeColor = ForeColor;
            grpBox.Size = new Size(crdBox.ClientSize.Width - 20, 40);
            grpBox.Location = new Point(10, grpBoxStart);
            crdBox.Controls.Add(grpBox);

            //Wir holen Abstand 5.
            Label lgn = new Label();
            lgn.Text = "Anmeldename: ";
            lgn.AutoSize = true;
            grpBox.Controls.Add(lgn);
            lgn.Location = new Point( 5,  15);


            TextBox lgnName = new TextBox();
            lgnName.Width = grpBox.ClientSize.Width - 15 - lgn.Width;
            lgnName.Location = new Point(grpBox.ClientSize.Width - lgnName.Width - 5, 15);
            grpBox.Controls.Add(lgnName);
            double TextBoxNameMid = lgnName.Height / 2.0;
            double LabelName = lgn.Height / 2.0;
            lgn.Location = new Point(5,15 + (int)(TextBoxNameMid - LabelName));

            TextBox txtBoxPW = new TextBox();
            txtBoxPW.Width = grpBox.ClientSize.Width - 15 - lgn.Width;
            txtBoxPW.Location = new Point(lgnName.Location.X, lgnName.Location.Y + lgnName.Height + 5);
            txtBoxPW.UseSystemPasswordChar = true;
            grpBox.Controls.Add(txtBoxPW);
            grpBox.Height = txtBoxPW.Location.Y + txtBoxPW.Height + 10;


            Label kwt = new Label();
            kwt.Text = "Kennwort: ";
            kwt.AutoSize = true;
            grpBox.Controls.Add(kwt);
            double TextBoxNameMid2 = txtBoxPW.Height / 2.0;
            double LabelName2 = kwt.Height / 2.0;
            kwt.Location = new Point(5, txtBoxPW.Location.Y + (int)(TextBoxNameMid2 - LabelName2));

            //Ende Groupbox

            Button abbr = new Button();
            abbr.Text = "&Abbrechen";
            abbr.Location = new Point(crdBox.ClientSize.Width - 10 - abbr.Width, grpBox.Location.Y + grpBox.Height + 5);
            abbr.DialogResult = DialogResult.Cancel;
            crdBox.Controls.Add(abbr);

            Button loginbutton = new Button();
            loginbutton.Text = "&Login";
            loginbutton.Location = new Point(abbr.Location.X - 5 - loginbutton.Width, abbr.Location.Y);
            loginbutton.DialogResult = DialogResult.OK;
            crdBox.Controls.Add(loginbutton);

            crdBox.ClientSize = new Size(crdBox.ClientSize.Width, loginbutton.Location.Y + 5 + loginbutton.Height);

            crdBox.AcceptButton = loginbutton;
            crdBox.CancelButton = abbr;

            DialogResult result = crdBox.ShowDialog();

            if(result == DialogResult.OK) {
                login = lgnName.Text;
                password = txtBoxPW.Text;
            }

            //Aufräumen
            foreach (Control control in crdBox.Controls) {
                foreach (Control innerControl in control.Controls) {
                    innerControl.Dispose();
                }
                control.Dispose();
            }
            crdBox.Dispose();

            return result;
        }

        #endregion

        #region Aufrufen
        /// <summary>
        /// Erstellt einen Logindialog
        /// </summary>
        /// <param name="message">Die Nachricht die angezeigt werden soll.</param>
        /// <param name="title">Der Title im Fensterrahmen</param>
        /// <param name="ico">Eine Bitmap zum anzeigen</param>
        /// <param name="login">Loginstring zum speichern</param>
        /// <param name="password">Passwordstring zum speichern</param>
        /// <returns></returns>
        public static DialogResult ShowLoginBox(string message, string title, Bitmap icon, ref string login, ref string password) {
            return  _ShowLoginBox(message, title, icon, ref login,ref password) ;
        }

        /// <summary>
        /// Erstellt einen Logindialog
        /// </summary>
        /// <param name="message">Die Nachricht die angezeigt werden soll.</param>
        /// <param name="title">Der Title im Fensterrahmen</param>
        /// <param name="ico">Viele Icons bekommen sie aus SystemIcons....</param>
        /// <param name="login">Loginstring zum speichern</param>
        /// <param name="password">Passwordstring zum speichern</param>
        /// <returns></returns>
        public static DialogResult ShowLoginBox(string message, string title, Icon ico, ref string login, ref string password) {
            Bitmap bico =  ico.ToBitmap();
            return _ShowLoginBox(message, title, bico, ref login, ref password);
        }

        #endregion

    }

}