La tête la Première, C# Lab1 Un Jour aux Courses de la méthode appelée la non-exécution

J'ai un problème avec le greyhound application que j'ai créé. lorsque j'utilise le bouton radio pour sélectionner qui est de placer un pari (Dire Bob) et de mettre son pari à hauteur de 10 sur le chien numéro 4, (voir image n ° 1) lorsque je clique sur Paris, pour mettre à jour le "Bob n'en a pas placé tout paris" de l'étiquette avec la description() la méthode, j'obtiens une erreur (voir image n ° 2)

La tête la Première, C# Lab1 Un Jour aux Courses de la méthode appelée la non-exécution

La tête la Première, C# Lab1 Un Jour aux Courses de la méthode appelée la non-exécution

Ce qui devait arriver est où il est dit "bob n'en a pas placé tout paris" désormais, il devrait lire "bob paris 10 mâles sur le chien n ° 4. J'ai créé ce est un échec en raison de la parieur de retourner NULL, mais je ne peux pas savoir pourquoi c'est quand Parieur est de référencement, le Gars de la classe qui contient le parieur nom.

Sur un côté notem lorsque la course se termine et si Bob gagne, il n'est pas payé donc, soit le Paiement() ou Collect() méthodes ne fonctionnent pas non plus.

Ci-dessous sont mes 3 classes et mon Form1.cs

Greyhound.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Drawing;
using System.Windows.Forms;

namespace A_Day_at_the_Races
{
    public class Greyhound
    {
        public int StartingPosition; //Where my PictureBox starts
        public int RacetrackLength; //How long the racetrack is
        public PictureBox MyPictureBox = null; //My PictureBox object
        public int Location = 0; //My Location on the racetrack
        public Random Randomizer; //An instance of Random

        public bool Run()
        {
            //1. Move forward either 1,2,3 or 4 spaces at random
            int moveforward = Randomizer.Next(1, 4); //declare an int called 'moveforward' will move forward 1,2,3 or 4 spaces at random

            //2. Update the position of my PictureBox on the form
            Point p = MyPictureBox.Location; //current location of the picture of the greyhound
            p.X += moveforward;
            MyPictureBox.Location = p;

            //3. Return true if I won the race
            if (p.X >= RacetrackLength)
                return true;
            else
                return false;
        }

        public void TakeStartingPosition()
        {
            //Reset my location to the start line
            //MyPictureBox.Location.X = StartingPosition;

            StartingPosition = 0;
        }
    }
}

Gars.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace A_Day_at_the_Races
{
public class Guy
{
public string Name; //The guy's name
public Bet MyBet = null; //An instance of bet() that has how much he's betting
public int Cash; //How much cash he has
//these last two fields are the guy's GUI controls on the form
public RadioButton MyRadioButton; //My RadioButton
public Label MyLabel; //My Label
public void UpdateLabels()
{
//1.Set my label to my bet's description, 
if (MyBet == null)
MyLabel.Text = Name + " hasnt placed any bets";
else
MyLabel.Text = MyBet.GetDescription();
//2.Set the label on my radio button to show my cash ("Joe has 43 dollars")
MyRadioButton.Text = Name + " has " + Cash + " bucks";
}
public void ClearBet()
{
//1.Reset my bet so it's zero
MyBet = null;
}
//1.Place a new bet and store it in my bet field
//2.Return true if the guy had enough money to bet
public bool PlaceBet(int Amount, int Dog)
{
this.MyBet = new Bet();
if (Cash >= Amount)
{
Cash = Cash - Amount;
MyLabel = new Label();
MyBet.Amount = Amount;
MyBet.Dog = Dog;
UpdateLabels();
return true;
}
else
{
return false;
}
}
public void Collect(int Winner)
{
if (MyBet != null)
//1.Ask my bet to pay out (hint use the bet object to do the work)
Cash += MyBet.PayOut(Winner);
}
}
}

Pari.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace A_Day_at_the_Races
{
public class Bet
{
public int Amount; //The amount of cash that was bet
public int Dog; //The number of the dog the bet is on
public Guy Bettor; //The guy who placed the bet
public string GetDescription()
{
if (Amount > 0)
return Bettor.Name + " bets " + Amount + " bucks on dog #" + Dog;
else
return Bettor.Name + " hasnt placed a bet";
}
public int PayOut(int Winner)
{
if (Winner == Dog)
return Amount;
else
return -1 * Amount;
}
}
}

Form1.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace A_Day_at_the_Races
{
public partial class Form1 : Form
{
Guy[] Bettors;
Greyhound[] Dogs;
Guy CurrentBettor;
public Form1()
{
InitializeComponent();
Random Randomizer = new Random();
//initialise all my guys and dogs
Bettors = new Guy[3];
Dogs = new Greyhound[4];
//guys
Bettors[0] = new Guy();
Bettors[0].Name = "Joe";
Bettors[0].MyRadioButton = joeRadioButton;
Bettors[0].MyLabel = joeBetLabel;
Bettors[0].Cash = 50;
Bettors[0].UpdateLabels();
Bettors[1] = new Guy();
Bettors[1].Name = "Bob";
Bettors[1].MyRadioButton = bobRadioButton;
Bettors[1].MyLabel = bobBetLabel;
Bettors[1].Cash = 75;
Bettors[1].UpdateLabels();
Bettors[2] = new Guy();
Bettors[2].Name = "Al";
Bettors[2].MyRadioButton = alRadioButton;
Bettors[2].MyLabel = alBetLabel;
Bettors[2].Cash = 45;
Bettors[2].UpdateLabels();
int StartPosition = pictureBoxDog1.Location.X;
int distance = pictureBox1.Width;
for (int i = 0; i < 4; i++)
{
Dogs[i] = new Greyhound();
Dogs[i].Randomizer = Randomizer;
Dogs[i].RacetrackLength = distance;
Dogs[i].Location = Dogs[i].StartingPosition = StartPosition;
}
Dogs[0].MyPictureBox = pictureBoxDog1;
Dogs[1].MyPictureBox = pictureBoxDog2;
Dogs[2].MyPictureBox = pictureBoxDog3;
Dogs[3].MyPictureBox = pictureBoxDog4;
CurrentBettor = Bettors[0];
}
private void RaceButton_Click(object sender, EventArgs e)
{
int winner = 0;
int num_winners = 0;
while (num_winners == 0)
{
for (int i = 0; i < Dogs.Length; i++)
{
if (Dogs[i].Run())
{
num_winners++;
winner = i + 1;
}
}
Application.DoEvents();
System.Threading.Thread.Sleep(3);
}
if (num_winners > 1)
MessageBox.Show("We have " + num_winners + " winners");
else
MessageBox.Show(" Dog #" + winner + "wins!");
for (int i = 0; i < Dogs.Length; i++)
{
Dogs[i].TakeStartingPosition();
}
for (int i = 0; i < Bettors.Length; i ++)
{
Bettors[i].Collect(winner);
Bettors[i].ClearBet();
Bettors[i].UpdateLabels();
}
numericUpDownBet.Value = numericUpDownBet.Minimum;
numericUpDownDog.Value = numericUpDownDog.Minimum;
}
private void joeRadioButton_CheckedChanged(object sender, EventArgs e)
{
SetBettor(0);
}
private void bobRadioButton_CheckedChanged_1(object sender, EventArgs e)
{
SetBettor(1);
}
private void alRadioButton_CheckedChanged_1(object sender, EventArgs e)
{
SetBettor(2);
}
private void BetsButton_Click(object sender, EventArgs e)
{
CurrentBettor.PlaceBet((int)numericUpDownBet.Value, (int)numericUpDownDog.Value);
CurrentBettor.UpdateLabels();
}
private void SetBettor(int index)
{
CurrentBettor = Bettors[index];
NameLabel.Text = CurrentBettor.Name;
if (CurrentBettor.MyBet != null)
{
numericUpDownBet.Value = CurrentBettor.MyBet.Amount;
numericUpDownDog.Value = CurrentBettor.MyBet.Dog;
}
else
{
numericUpDownBet.Value = numericUpDownBet.Minimum;
numericUpDownDog.Value = 1;
}
}
private void Form1_Load(object sender, EventArgs e)
{
minimumBetLabel.Text = "Minimum Bet $5.00";
}
private void ResetButton_Click(object sender, EventArgs e)
{
pictureBoxDog1.Location = new Point(61,32);
pictureBoxDog2.Location = new Point(61,84);
pictureBoxDog3.Location = new Point(61,131);
pictureBoxDog4.Location = new Point(61,181);
}
}
}

Form1.Le concepteur.cs

namespace A_Day_at_the_Races
{
partial class Form1
{
///<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()
{
System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(Form1));
this.pictureBox1 = new System.Windows.Forms.PictureBox();
this.pictureBoxDog1 = new System.Windows.Forms.PictureBox();
this.pictureBoxDog2 = new System.Windows.Forms.PictureBox();
this.pictureBoxDog3 = new System.Windows.Forms.PictureBox();
this.pictureBoxDog4 = new System.Windows.Forms.PictureBox();
this.RaceButton = new System.Windows.Forms.Button();
this.minimumBetLabel = new System.Windows.Forms.Label();
this.joeRadioButton = new System.Windows.Forms.RadioButton();
this.bobRadioButton = new System.Windows.Forms.RadioButton();
this.alRadioButton = new System.Windows.Forms.RadioButton();
this.BetsLabel = new System.Windows.Forms.Label();
this.joeBetLabel = new System.Windows.Forms.Label();
this.bobBetLabel = new System.Windows.Forms.Label();
this.alBetLabel = new System.Windows.Forms.Label();
this.NameLabel = new System.Windows.Forms.Label();
this.BetsButton = new System.Windows.Forms.Button();
this.numericUpDownBet = new System.Windows.Forms.NumericUpDown();
this.label1 = new System.Windows.Forms.Label();
this.numericUpDownDog = new System.Windows.Forms.NumericUpDown();
this.ResetButton = new System.Windows.Forms.Button();
((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).BeginInit();
((System.ComponentModel.ISupportInitialize)(this.pictureBoxDog1)).BeginInit();
((System.ComponentModel.ISupportInitialize)(this.pictureBoxDog2)).BeginInit();
((System.ComponentModel.ISupportInitialize)(this.pictureBoxDog3)).BeginInit();
((System.ComponentModel.ISupportInitialize)(this.pictureBoxDog4)).BeginInit();
((System.ComponentModel.ISupportInitialize)(this.numericUpDownBet)).BeginInit();
((System.ComponentModel.ISupportInitialize)(this.numericUpDownDog)).BeginInit();
this.SuspendLayout();
//
//pictureBox1
//
this.pictureBox1.Image = ((System.Drawing.Image)(resources.GetObject("pictureBox1.Image")));
this.pictureBox1.Location = new System.Drawing.Point(12, 12);
this.pictureBox1.Name = "pictureBox1";
this.pictureBox1.Size = new System.Drawing.Size(602, 201);
this.pictureBox1.TabIndex = 0;
this.pictureBox1.TabStop = false;
//
//pictureBoxDog1
//
this.pictureBoxDog1.Image = ((System.Drawing.Image)(resources.GetObject("pictureBoxDog1.Image")));
this.pictureBoxDog1.Location = new System.Drawing.Point(22, 21);
this.pictureBoxDog1.Name = "pictureBoxDog1";
this.pictureBoxDog1.Size = new System.Drawing.Size(75, 21);
this.pictureBoxDog1.TabIndex = 1;
this.pictureBoxDog1.TabStop = false;
//
//pictureBoxDog2
//
this.pictureBoxDog2.Image = ((System.Drawing.Image)(resources.GetObject("pictureBoxDog2.Image")));
this.pictureBoxDog2.Location = new System.Drawing.Point(22, 70);
this.pictureBoxDog2.Name = "pictureBoxDog2";
this.pictureBoxDog2.Size = new System.Drawing.Size(75, 22);
this.pictureBoxDog2.TabIndex = 2;
this.pictureBoxDog2.TabStop = false;
//
//pictureBoxDog3
//
this.pictureBoxDog3.Image = ((System.Drawing.Image)(resources.GetObject("pictureBoxDog3.Image")));
this.pictureBoxDog3.Location = new System.Drawing.Point(22, 120);
this.pictureBoxDog3.Name = "pictureBoxDog3";
this.pictureBoxDog3.Size = new System.Drawing.Size(75, 24);
this.pictureBoxDog3.TabIndex = 3;
this.pictureBoxDog3.TabStop = false;
//
//pictureBoxDog4
//
this.pictureBoxDog4.Image = ((System.Drawing.Image)(resources.GetObject("pictureBoxDog4.Image")));
this.pictureBoxDog4.Location = new System.Drawing.Point(22, 170);
this.pictureBoxDog4.Name = "pictureBoxDog4";
this.pictureBoxDog4.Size = new System.Drawing.Size(75, 24);
this.pictureBoxDog4.TabIndex = 4;
this.pictureBoxDog4.TabStop = false;
//
//RaceButton
//
this.RaceButton.Location = new System.Drawing.Point(468, 269);
this.RaceButton.Name = "RaceButton";
this.RaceButton.Size = new System.Drawing.Size(146, 73);
this.RaceButton.TabIndex = 5;
this.RaceButton.Text = "Race!";
this.RaceButton.UseVisualStyleBackColor = true;
this.RaceButton.Click += new System.EventHandler(this.RaceButton_Click);
//
//minimumBetLabel
//
this.minimumBetLabel.AutoSize = true;
this.minimumBetLabel.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
this.minimumBetLabel.Location = new System.Drawing.Point(9, 241);
this.minimumBetLabel.Name = "minimumBetLabel";
this.minimumBetLabel.Size = new System.Drawing.Size(0, 13);
this.minimumBetLabel.TabIndex = 6;
//
//joeRadioButton
//
this.joeRadioButton.AutoSize = true;
this.joeRadioButton.Location = new System.Drawing.Point(12, 269);
this.joeRadioButton.Name = "joeRadioButton";
this.joeRadioButton.Size = new System.Drawing.Size(85, 17);
this.joeRadioButton.TabIndex = 7;
this.joeRadioButton.TabStop = true;
this.joeRadioButton.Text = "radioButton1";
this.joeRadioButton.UseVisualStyleBackColor = true;
this.joeRadioButton.CheckedChanged += new System.EventHandler(this.joeRadioButton_CheckedChanged);
//
//bobRadioButton
//
this.bobRadioButton.AutoSize = true;
this.bobRadioButton.Location = new System.Drawing.Point(12, 293);
this.bobRadioButton.Name = "bobRadioButton";
this.bobRadioButton.Size = new System.Drawing.Size(85, 17);
this.bobRadioButton.TabIndex = 8;
this.bobRadioButton.TabStop = true;
this.bobRadioButton.Text = "radioButton1";
this.bobRadioButton.UseVisualStyleBackColor = true;
this.bobRadioButton.CheckedChanged += new System.EventHandler(this.bobRadioButton_CheckedChanged_1);
//
//alRadioButton
//
this.alRadioButton.AutoSize = true;
this.alRadioButton.Location = new System.Drawing.Point(12, 317);
this.alRadioButton.Name = "alRadioButton";
this.alRadioButton.Size = new System.Drawing.Size(85, 17);
this.alRadioButton.TabIndex = 9;
this.alRadioButton.TabStop = true;
this.alRadioButton.Text = "radioButton2";
this.alRadioButton.UseVisualStyleBackColor = true;
this.alRadioButton.CheckedChanged += new System.EventHandler(this.alRadioButton_CheckedChanged_1);
//
//BetsLabel
//
this.BetsLabel.AutoSize = true;
this.BetsLabel.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
this.BetsLabel.Location = new System.Drawing.Point(164, 241);
this.BetsLabel.Name = "BetsLabel";
this.BetsLabel.Size = new System.Drawing.Size(32, 13);
this.BetsLabel.TabIndex = 10;
this.BetsLabel.Text = "Bets";
//
//joeBetLabel
//
this.joeBetLabel.AutoSize = true;
this.joeBetLabel.Location = new System.Drawing.Point(164, 269);
this.joeBetLabel.Name = "joeBetLabel";
this.joeBetLabel.Size = new System.Drawing.Size(35, 13);
this.joeBetLabel.TabIndex = 11;
this.joeBetLabel.Text = "label1";
//
//bobBetLabel
//
this.bobBetLabel.AutoSize = true;
this.bobBetLabel.Location = new System.Drawing.Point(164, 293);
this.bobBetLabel.Name = "bobBetLabel";
this.bobBetLabel.Size = new System.Drawing.Size(35, 13);
this.bobBetLabel.TabIndex = 12;
this.bobBetLabel.Text = "label1";
//
//alBetLabel
//
this.alBetLabel.AutoSize = true;
this.alBetLabel.Location = new System.Drawing.Point(164, 317);
this.alBetLabel.Name = "alBetLabel";
this.alBetLabel.Size = new System.Drawing.Size(35, 13);
this.alBetLabel.TabIndex = 13;
this.alBetLabel.Text = "label1";
//
//NameLabel
//
this.NameLabel.AutoSize = true;
this.NameLabel.Location = new System.Drawing.Point(9, 359);
this.NameLabel.Name = "NameLabel";
this.NameLabel.Size = new System.Drawing.Size(0, 13);
this.NameLabel.TabIndex = 14;
//
//BetsButton
//
this.BetsButton.Location = new System.Drawing.Point(54, 354);
this.BetsButton.Name = "BetsButton";
this.BetsButton.Size = new System.Drawing.Size(75, 23);
this.BetsButton.TabIndex = 15;
this.BetsButton.Text = "Bets";
this.BetsButton.UseVisualStyleBackColor = true;
this.BetsButton.Click += new System.EventHandler(this.BetsButton_Click);
//
//numericUpDownBet
//
this.numericUpDownBet.Location = new System.Drawing.Point(135, 357);
this.numericUpDownBet.Minimum = new decimal(new int[] {
5,
0,
0,
0});
this.numericUpDownBet.Name = "numericUpDownBet";
this.numericUpDownBet.Size = new System.Drawing.Size(72, 20);
this.numericUpDownBet.TabIndex = 16;
this.numericUpDownBet.Value = new decimal(new int[] {
5,
0,
0,
0});
//
//label1
//
this.label1.AutoSize = true;
this.label1.Location = new System.Drawing.Point(214, 359);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(113, 13);
this.label1.TabIndex = 17;
this.label1.Text = "bucks on dog number ";
//
//numericUpDownDog
//
this.numericUpDownDog.Location = new System.Drawing.Point(334, 356);
this.numericUpDownDog.Maximum = new decimal(new int[] {
4,
0,
0,
0});
this.numericUpDownDog.Minimum = new decimal(new int[] {
1,
0,
0,
0});
this.numericUpDownDog.Name = "numericUpDownDog";
this.numericUpDownDog.Size = new System.Drawing.Size(79, 20);
this.numericUpDownDog.TabIndex = 18;
this.numericUpDownDog.Value = new decimal(new int[] {
1,
0,
0,
0});
//
//ResetButton
//
this.ResetButton.Location = new System.Drawing.Point(468, 349);
this.ResetButton.Name = "ResetButton";
this.ResetButton.Size = new System.Drawing.Size(146, 41);
this.ResetButton.TabIndex = 19;
this.ResetButton.Text = "Reset";
this.ResetButton.UseVisualStyleBackColor = true;
this.ResetButton.Click += new System.EventHandler(this.ResetButton_Click);
//
//Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(626, 410);
this.Controls.Add(this.ResetButton);
this.Controls.Add(this.numericUpDownDog);
this.Controls.Add(this.label1);
this.Controls.Add(this.numericUpDownBet);
this.Controls.Add(this.BetsButton);
this.Controls.Add(this.NameLabel);
this.Controls.Add(this.alBetLabel);
this.Controls.Add(this.bobBetLabel);
this.Controls.Add(this.joeBetLabel);
this.Controls.Add(this.BetsLabel);
this.Controls.Add(this.alRadioButton);
this.Controls.Add(this.bobRadioButton);
this.Controls.Add(this.joeRadioButton);
this.Controls.Add(this.minimumBetLabel);
this.Controls.Add(this.RaceButton);
this.Controls.Add(this.pictureBoxDog4);
this.Controls.Add(this.pictureBoxDog3);
this.Controls.Add(this.pictureBoxDog2);
this.Controls.Add(this.pictureBoxDog1);
this.Controls.Add(this.pictureBox1);
this.Name = "Form1";
this.Text = "Form1";
this.Load += new System.EventHandler(this.Form1_Load);
((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).EndInit();
((System.ComponentModel.ISupportInitialize)(this.pictureBoxDog1)).EndInit();
((System.ComponentModel.ISupportInitialize)(this.pictureBoxDog2)).EndInit();
((System.ComponentModel.ISupportInitialize)(this.pictureBoxDog3)).EndInit();
((System.ComponentModel.ISupportInitialize)(this.pictureBoxDog4)).EndInit();
((System.ComponentModel.ISupportInitialize)(this.numericUpDownBet)).EndInit();
((System.ComponentModel.ISupportInitialize)(this.numericUpDownDog)).EndInit();
this.ResumeLayout(false);
this.PerformLayout();
}
#endregion
private System.Windows.Forms.PictureBox pictureBox1;
private System.Windows.Forms.PictureBox pictureBoxDog1;
private System.Windows.Forms.PictureBox pictureBoxDog2;
private System.Windows.Forms.PictureBox pictureBoxDog3;
private System.Windows.Forms.PictureBox pictureBoxDog4;
private System.Windows.Forms.Button RaceButton;
private System.Windows.Forms.Label minimumBetLabel;
private System.Windows.Forms.RadioButton joeRadioButton;
private System.Windows.Forms.RadioButton bobRadioButton;
private System.Windows.Forms.RadioButton alRadioButton;
private System.Windows.Forms.Label BetsLabel;
private System.Windows.Forms.Label joeBetLabel;
private System.Windows.Forms.Label bobBetLabel;
private System.Windows.Forms.Label alBetLabel;
private System.Windows.Forms.Label NameLabel;
private System.Windows.Forms.Button BetsButton;
private System.Windows.Forms.NumericUpDown numericUpDownBet;
private System.Windows.Forms.Label label1;
private System.Windows.Forms.NumericUpDown numericUpDownDog;
private System.Windows.Forms.Button ResetButton;
}
}
Trop de code, de réduire votre question du cœur du problème. Ce n'est ni Codereview, ni WriteMyCode.
Toutes mes excuses, je pensais que vous pourriez voulez tout voir et pour être honnête avec vous, je ne suis pas 100% sûr de l'endroit où se trouve le problème donc n'a pas voulu deviner et de supprimer quelque chose de nécessaire.
J'ai reformaté et minimified votre code un peu. Veuillez noter que vous avez oublié d'ajouter Form1.Le concepteur.cs et comme nous ne peut pas EXÉCUTER les exemples de code, lire et imaginer 🙂
le retrait et l'essayer c'est une façon de débogage! Il n'y a pas de faute en enlevant lentement code et essayer de voir si le problème persiste.

OriginalL'auteur JsonStatham | 2012-08-31