Lesson 21.3 - Add a button and create its eventhandler in code, without the UI design screen

SuperAdventure.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO;

using Engine;

namespace SuperAdventure
{
    public partial class SuperAdventure : Form
    {
        private const string PLAYER_DATA_FILE_NAME = "PlayerData.xml";

        private Player _player;

        public SuperAdventure()
        {
            InitializeComponent();

            if(File.Exists(PLAYER_DATA_FILE_NAME))
            {
                _player = Player.CreatePlayerFromXmlString(File.ReadAllText(PLAYER_DATA_FILE_NAME));
            }
            else
            {
                _player = Player.CreateDefaultPlayer();
            }

            lblHitPoints.DataBindings.Add("Text", _player, "CurrentHitPoints");
            lblGold.DataBindings.Add("Text", _player, "Gold");
            lblExperience.DataBindings.Add("Text", _player, "ExperiencePoints");
            lblLevel.DataBindings.Add("Text", _player, "Level");

            dgvInventory.RowHeadersVisible = false;
            dgvInventory.AutoGenerateColumns = false;

            dgvInventory.DataSource = _player.Inventory;

            dgvInventory.Columns.Add(new DataGridViewTextBoxColumn
            {
                HeaderText = "Name",
                Width = 197,
                DataPropertyName = "Description"
            });

            dgvInventory.Columns.Add(new DataGridViewTextBoxColumn
            {
                HeaderText = "Quantity",
                DataPropertyName = "Quantity"
            });

            dgvQuests.RowHeadersVisible = false;
            dgvQuests.AutoGenerateColumns = false;

            dgvQuests.DataSource = _player.Quests;

            dgvQuests.Columns.Add(new DataGridViewTextBoxColumn
            {
                HeaderText = "Name",
                Width = 197,
                DataPropertyName = "Name"
            });

            dgvQuests.Columns.Add(new DataGridViewTextBoxColumn
            {
                HeaderText = "Done?",
                DataPropertyName = "IsCompleted"
            });

            cboWeapons.DataSource = _player.Weapons;
            cboWeapons.DisplayMember = "Name";
            cboWeapons.ValueMember = "Id";

            if(_player.CurrentWeapon != null)
            {
                cboWeapons.SelectedItem = _player.CurrentWeapon;
            }

            cboWeapons.SelectedIndexChanged += cboWeapons_SelectedIndexChanged;

            cboPotions.DataSource = _player.Potions;
            cboPotions.DisplayMember = "Name";
            cboPotions.ValueMember = "Id";

            _player.PropertyChanged += PlayerOnPropertyChanged;
            _player.OnMessage += DisplayMessage;

            _player.MoveTo(_player.CurrentLocation);
        }

        private void DisplayMessage(object sender, MessageEventArgs messageEventArgs)
        {
            rtbMessages.Text += messageEventArgs.Message + Environment.NewLine;

            if(messageEventArgs.AddExtraNewLine)
            {
                rtbMessages.Text += Environment.NewLine;
            }

            rtbMessages.SelectionStart = rtbMessages.Text.Length;
            rtbMessages.ScrollToCaret();
        }

        private void PlayerOnPropertyChanged(object sender, PropertyChangedEventArgs propertyChangedEventArgs)
        {
            if(propertyChangedEventArgs.PropertyName == "Weapons")
            {
                cboWeapons.DataSource = _player.Weapons;

                if(!_player.Weapons.Any())
                {
                    cboWeapons.Visible = false;
                    btnUseWeapon.Visible = false;
                }
            }

            if(propertyChangedEventArgs.PropertyName == "Potions")
            {
                cboPotions.DataSource = _player.Potions;

                if(!_player.Potions.Any())
                {
                    cboPotions.Visible = false;
                    btnUsePotion.Visible = false;
                }
            }

            if(propertyChangedEventArgs.PropertyName == "CurrentLocation")
            {
                // Show/hide available movement buttons
                btnNorth.Visible = (_player.CurrentLocation.LocationToNorth != null);
                btnEast.Visible = (_player.CurrentLocation.LocationToEast != null);
                btnSouth.Visible = (_player.CurrentLocation.LocationToSouth != null);
                btnWest.Visible = (_player.CurrentLocation.LocationToWest != null);

                // Display current location name and description
                rtbLocation.Text = _player.CurrentLocation.Name + Environment.NewLine;
                rtbLocation.Text += _player.CurrentLocation.Description + Environment.NewLine;

                if(_player.CurrentLocation.MonsterLivingHere == null)
                {
                    cboWeapons.Visible = false;
                    cboPotions.Visible = false;
                    btnUseWeapon.Visible = false;
                    btnUsePotion.Visible = false;
                }
                else
                {
                    cboWeapons.Visible = _player.Weapons.Any();
                    cboPotions.Visible = _player.Potions.Any();
                    btnUseWeapon.Visible = _player.Weapons.Any();
                    btnUsePotion.Visible = _player.Potions.Any();
                }
            }
        }

        private void btnNorth_Click(object sender, EventArgs e)
        {
            _player.MoveNorth();
        }

        private void btnEast_Click(object sender, EventArgs e)
        {
            _player.MoveEast();
        }

        private void btnSouth_Click(object sender, EventArgs e)
        {
            _player.MoveSouth();
        }

        private void btnWest_Click(object sender, EventArgs e)
        {
            _player.MoveWest();
        }

        private void btnUseWeapon_Click(object sender, EventArgs e)
        {
            // Get the currently selected weapon from the cboWeapons ComboBox
            Weapon currentWeapon = (Weapon)cboWeapons.SelectedItem;

            _player.UseWeapon(currentWeapon);
        }

        private void btnUsePotion_Click(object sender, EventArgs e)
        {
            // Get the currently selected potion from the combobox
            HealingPotion potion = (HealingPotion)cboPotions.SelectedItem;

            _player.UsePotion(potion);
        }

        private void SuperAdventure_FormClosing(object sender, FormClosingEventArgs e)
        {
            File.WriteAllText(PLAYER_DATA_FILE_NAME, _player.ToXmlString());
        }

        private void cboWeapons_SelectedIndexChanged(object sender, EventArgs e)
        {
            _player.CurrentWeapon = (Weapon)cboWeapons.SelectedItem;
        }

        private void btnTrade_Click(object sender, EventArgs e)
        {
        }
    }
}

SuperAdventure.Designer.cs

namespace SuperAdventure
{
    partial class SuperAdventure
    {
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
        protected override void Dispose(bool disposing)
        {
            if(disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Windows Form Designer generated code

        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            this.label1 = new System.Windows.Forms.Label();
            this.label2 = new System.Windows.Forms.Label();
            this.label3 = new System.Windows.Forms.Label();
            this.label4 = new System.Windows.Forms.Label();
            this.lblHitPoints = new System.Windows.Forms.Label();
            this.lblGold = new System.Windows.Forms.Label();
            this.lblExperience = new System.Windows.Forms.Label();
            this.lblLevel = new System.Windows.Forms.Label();
            this.label5 = new System.Windows.Forms.Label();
            this.cboWeapons = new System.Windows.Forms.ComboBox();
            this.cboPotions = new System.Windows.Forms.ComboBox();
            this.btnUseWeapon = new System.Windows.Forms.Button();
            this.btnUsePotion = new System.Windows.Forms.Button();
            this.btnNorth = new System.Windows.Forms.Button();
            this.btnEast = new System.Windows.Forms.Button();
            this.btnSouth = new System.Windows.Forms.Button();
            this.btnWest = new System.Windows.Forms.Button();
            this.rtbLocation = new System.Windows.Forms.RichTextBox();
            this.rtbMessages = new System.Windows.Forms.RichTextBox();
            this.dgvInventory = new System.Windows.Forms.DataGridView();
            this.dgvQuests = new System.Windows.Forms.DataGridView();
            this.btnTrade = new System.Windows.Forms.Button();
            ((System.ComponentModel.ISupportInitialize)(this.dgvInventory)).BeginInit();
            ((System.ComponentModel.ISupportInitialize)(this.dgvQuests)).BeginInit();
            this.SuspendLayout();
            // 
            // label1
            // 
            this.label1.AutoSize = true;
            this.label1.Location = new System.Drawing.Point(18, 20);
            this.label1.Name = "label1";
            this.label1.Size = new System.Drawing.Size(55, 13);
            this.label1.TabIndex = 0;
            this.label1.Text = "Hit Points:";
            // 
            // label2
            // 
            this.label2.AutoSize = true;
            this.label2.Location = new System.Drawing.Point(18, 46);
            this.label2.Name = "label2";
            this.label2.Size = new System.Drawing.Size(32, 13);
            this.label2.TabIndex = 1;
            this.label2.Text = "Gold:";
            // 
            // label3
            // 
            this.label3.AutoSize = true;
            this.label3.Location = new System.Drawing.Point(18, 74);
            this.label3.Name = "label3";
            this.label3.Size = new System.Drawing.Size(63, 13);
            this.label3.TabIndex = 2;
            this.label3.Text = "Experience:";
            // 
            // label4
            // 
            this.label4.AutoSize = true;
            this.label4.Location = new System.Drawing.Point(18, 100);
            this.label4.Name = "label4";
            this.label4.Size = new System.Drawing.Size(36, 13);
            this.label4.TabIndex = 3;
            this.label4.Text = "Level:";
            // 
            // lblHitPoints
            // 
            this.lblHitPoints.AutoSize = true;
            this.lblHitPoints.Location = new System.Drawing.Point(110, 19);
            this.lblHitPoints.Name = "lblHitPoints";
            this.lblHitPoints.Size = new System.Drawing.Size(0, 13);
            this.lblHitPoints.TabIndex = 4;
            // 
            // lblGold
            // 
            this.lblGold.AutoSize = true;
            this.lblGold.Location = new System.Drawing.Point(110, 45);
            this.lblGold.Name = "lblGold";
            this.lblGold.Size = new System.Drawing.Size(0, 13);
            this.lblGold.TabIndex = 5;
            // 
            // lblExperience
            // 
            this.lblExperience.AutoSize = true;
            this.lblExperience.Location = new System.Drawing.Point(110, 73);
            this.lblExperience.Name = "lblExperience";
            this.lblExperience.Size = new System.Drawing.Size(0, 13);
            this.lblExperience.TabIndex = 6;
            // 
            // lblLevel
            // 
            this.lblLevel.AutoSize = true;
            this.lblLevel.Location = new System.Drawing.Point(110, 99);
            this.lblLevel.Name = "lblLevel";
            this.lblLevel.Size = new System.Drawing.Size(0, 13);
            this.lblLevel.TabIndex = 7;
            // 
            // label5
            // 
            this.label5.AutoSize = true;
            this.label5.Location = new System.Drawing.Point(617, 531);
            this.label5.Name = "label5";
            this.label5.Size = new System.Drawing.Size(69, 13);
            this.label5.TabIndex = 8;
            this.label5.Text = "Select action";
            // 
            // cboWeapons
            // 
            this.cboWeapons.FormattingEnabled = true;
            this.cboWeapons.Location = new System.Drawing.Point(369, 559);
            this.cboWeapons.Name = "cboWeapons";
            this.cboWeapons.Size = new System.Drawing.Size(121, 21);
            this.cboWeapons.TabIndex = 9;
            // 
            // cboPotions
            // 
            this.cboPotions.FormattingEnabled = true;
            this.cboPotions.Location = new System.Drawing.Point(369, 593);
            this.cboPotions.Name = "cboPotions";
            this.cboPotions.Size = new System.Drawing.Size(121, 21);
            this.cboPotions.TabIndex = 10;
            // 
            // btnUseWeapon
            // 
            this.btnUseWeapon.Location = new System.Drawing.Point(620, 559);
            this.btnUseWeapon.Name = "btnUseWeapon";
            this.btnUseWeapon.Size = new System.Drawing.Size(75, 23);
            this.btnUseWeapon.TabIndex = 11;
            this.btnUseWeapon.Text = "Use";
            this.btnUseWeapon.UseVisualStyleBackColor = true;
            this.btnUseWeapon.Click += new System.EventHandler(this.btnUseWeapon_Click);
            // 
            // btnUsePotion
            // 
            this.btnUsePotion.Location = new System.Drawing.Point(620, 593);
            this.btnUsePotion.Name = "btnUsePotion";
            this.btnUsePotion.Size = new System.Drawing.Size(75, 23);
            this.btnUsePotion.TabIndex = 12;
            this.btnUsePotion.Text = "Use";
            this.btnUsePotion.UseVisualStyleBackColor = true;
            this.btnUsePotion.Click += new System.EventHandler(this.btnUsePotion_Click);
            // 
            // btnNorth
            // 
            this.btnNorth.Location = new System.Drawing.Point(493, 433);
            this.btnNorth.Name = "btnNorth";
            this.btnNorth.Size = new System.Drawing.Size(75, 23);
            this.btnNorth.TabIndex = 13;
            this.btnNorth.Text = "North";
            this.btnNorth.UseVisualStyleBackColor = true;
            this.btnNorth.Click += new System.EventHandler(this.btnNorth_Click);
            // 
            // btnEast
            // 
            this.btnEast.Location = new System.Drawing.Point(573, 457);
            this.btnEast.Name = "btnEast";
            this.btnEast.Size = new System.Drawing.Size(75, 23);
            this.btnEast.TabIndex = 14;
            this.btnEast.Text = "East";
            this.btnEast.UseVisualStyleBackColor = true;
            this.btnEast.Click += new System.EventHandler(this.btnEast_Click);
            // 
            // btnSouth
            // 
            this.btnSouth.Location = new System.Drawing.Point(493, 487);
            this.btnSouth.Name = "btnSouth";
            this.btnSouth.Size = new System.Drawing.Size(75, 23);
            this.btnSouth.TabIndex = 15;
            this.btnSouth.Text = "South";
            this.btnSouth.UseVisualStyleBackColor = true;
            this.btnSouth.Click += new System.EventHandler(this.btnSouth_Click);
            // 
            // btnWest
            // 
            this.btnWest.Location = new System.Drawing.Point(412, 457);
            this.btnWest.Name = "btnWest";
            this.btnWest.Size = new System.Drawing.Size(75, 23);
            this.btnWest.TabIndex = 16;
            this.btnWest.Text = "West";
            this.btnWest.UseVisualStyleBackColor = true;
            this.btnWest.Click += new System.EventHandler(this.btnWest_Click);
            // 
            // rtbLocation
            // 
            this.rtbLocation.Location = new System.Drawing.Point(347, 19);
            this.rtbLocation.Name = "rtbLocation";
            this.rtbLocation.ReadOnly = true;
            this.rtbLocation.Size = new System.Drawing.Size(360, 105);
            this.rtbLocation.TabIndex = 17;
            this.rtbLocation.Text = "";
            // 
            // rtbMessages
            // 
            this.rtbMessages.Location = new System.Drawing.Point(347, 130);
            this.rtbMessages.Name = "rtbMessages";
            this.rtbMessages.ReadOnly = true;
            this.rtbMessages.Size = new System.Drawing.Size(360, 286);
            this.rtbMessages.TabIndex = 18;
            this.rtbMessages.Text = "";
            // 
            // dgvInventory
            // 
            this.dgvInventory.AllowUserToAddRows = false;
            this.dgvInventory.AllowUserToDeleteRows = false;
            this.dgvInventory.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize;
            this.dgvInventory.EditMode = System.Windows.Forms.DataGridViewEditMode.EditProgrammatically;
            this.dgvInventory.Location = new System.Drawing.Point(16, 130);
            this.dgvInventory.MultiSelect = false;
            this.dgvInventory.Name = "dgvInventory";
            this.dgvInventory.ReadOnly = true;
            this.dgvInventory.Size = new System.Drawing.Size(312, 309);
            this.dgvInventory.TabIndex = 19;
            // 
            // dgvQuests
            // 
            this.dgvQuests.AllowUserToAddRows = false;
            this.dgvQuests.AllowUserToDeleteRows = false;
            this.dgvQuests.AllowUserToResizeRows = false;
            this.dgvQuests.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize;
            this.dgvQuests.EditMode = System.Windows.Forms.DataGridViewEditMode.EditProgrammatically;
            this.dgvQuests.Location = new System.Drawing.Point(16, 446);
            this.dgvQuests.MultiSelect = false;
            this.dgvQuests.Name = "dgvQuests";
            this.dgvQuests.ReadOnly = true;
            this.dgvQuests.Size = new System.Drawing.Size(312, 189);
            this.dgvQuests.TabIndex = 20;
            // 
            // btnTrade
            // 
            this.btnTrade.Location = new System.Drawing.Point(493, 620);
            this.btnTrade.Name = "btnTrade";
            this.btnTrade.Size = new System.Drawing.Size(75, 23);
            this.btnTrade.TabIndex = 21;
            this.btnTrade.Text = "Trade";
            this.btnTrade.UseVisualStyleBackColor = true;
            this.btnTrade.Click += new System.EventHandler(this.btnTrade_Click);
            // 
            // SuperAdventure
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(719, 651);
            this.Controls.Add(this.btnTrade);
            this.Controls.Add(this.dgvQuests);
            this.Controls.Add(this.dgvInventory);
            this.Controls.Add(this.rtbMessages);
            this.Controls.Add(this.rtbLocation);
            this.Controls.Add(this.btnWest);
            this.Controls.Add(this.btnSouth);
            this.Controls.Add(this.btnEast);
            this.Controls.Add(this.btnNorth);
            this.Controls.Add(this.btnUsePotion);
            this.Controls.Add(this.btnUseWeapon);
            this.Controls.Add(this.cboPotions);
            this.Controls.Add(this.cboWeapons);
            this.Controls.Add(this.label5);
            this.Controls.Add(this.lblLevel);
            this.Controls.Add(this.lblExperience);
            this.Controls.Add(this.lblGold);
            this.Controls.Add(this.lblHitPoints);
            this.Controls.Add(this.label4);
            this.Controls.Add(this.label3);
            this.Controls.Add(this.label2);
            this.Controls.Add(this.label1);
            this.Name = "SuperAdventure";
            this.Text = "My Game";
            this.FormClosing += new System.Windows.Forms.FormClosingEventHandler(this.SuperAdventure_FormClosing);
            ((System.ComponentModel.ISupportInitialize)(this.dgvInventory)).EndInit();
            ((System.ComponentModel.ISupportInitialize)(this.dgvQuests)).EndInit();
            this.ResumeLayout(false);
            this.PerformLayout();

        }

        #endregion

        private System.Windows.Forms.Label label1;
        private System.Windows.Forms.Label label2;
        private System.Windows.Forms.Label label3;
        private System.Windows.Forms.Label label4;
        private System.Windows.Forms.Label lblHitPoints;
        private System.Windows.Forms.Label lblGold;
        private System.Windows.Forms.Label lblExperience;
        private System.Windows.Forms.Label lblLevel;
        private System.Windows.Forms.Label label5;
        private System.Windows.Forms.ComboBox cboWeapons;
        private System.Windows.Forms.ComboBox cboPotions;
        private System.Windows.Forms.Button btnUseWeapon;
        private System.Windows.Forms.Button btnUsePotion;
        private System.Windows.Forms.Button btnNorth;
        private System.Windows.Forms.Button btnEast;
        private System.Windows.Forms.Button btnSouth;
        private System.Windows.Forms.Button btnWest;
        private System.Windows.Forms.RichTextBox rtbLocation;
        private System.Windows.Forms.RichTextBox rtbMessages;
        private System.Windows.Forms.DataGridView dgvInventory;
        private System.Windows.Forms.DataGridView dgvQuests;
        private System.Windows.Forms.Button btnTrade;
    }
}