我试图清除游戏结束后从列表中创建的图片框，我清除了列表，但图片框仍显示，我尝试使用以下代码在游戏结束时启用的计时器中
foreach (Invader ship in invaders)
{
ship.isDisposed = true;
ship.ship.Dispose();
}
这没什么用，所以有人对我该怎么做有任何想法吗？
public partial class Form1 : Form
{
private List<Invader> invaders = new List<Invader>();
private List<Laser> lasers = new List<Laser>();
int invaderNumber = 0;
int score = 0;
public Form1()
{
InitializeComponent();
}
private void Form1_KeyDown(object sender, KeyEventArgs e)
{
// moves the spacefighter up when clicked
if (e.KeyCode.Equals(Keys.W))
{
if (SpaceFighter.Top > 0)
{
SpaceFighter.Top = SpaceFighter.Top - 30;
}
}
// moves the spacefighter left when clicked
if (e.KeyCode.Equals(Keys.A))
{
if (SpaceFighter.Left > 0)
{
SpaceFighter.Left = SpaceFighter.Left - 10;
}
}
// moves the spacefighter right when clicked
if (e.KeyCode.Equals(Keys.D))
{
if (SpaceFighter.Right < this.Width)
{
SpaceFighter.Left = SpaceFighter.Left + 10;
}
}
// moves the spacefighter down when clicked
if (e.KeyCode.Equals(Keys.S))
{
if (SpaceFighter.Bottom < this.Height - 10)
{
SpaceFighter.Top = SpaceFighter.Top + 10;
}
}
// fires lasers when clicked
if (e.KeyCode.Equals(Keys.Space))
{
System.Media.SoundPlayer LaserSound = new System.Media.SoundPlayer(Properties.Resources.LaserSound);
LaserSound.Play();
this.lasers.Add(new Laser(this, SpaceFighter));
}
}
private void timer1_Tick(object sender, EventArgs e)
{
// introduces 10 enemies once the game starts
if (invaderNumber > 9 )
{
timer1.Enabled = false;
timer2.Enabled = true;
}
else
{
invaders.Add(new Invader(this));
invaderNumber++;
}
}
private void timer2_Tick(object sender, EventArgs e)
{
// detects if the enemy ship interacts with the spacefighter and ends the game if this happens
invaders.RemoveAll(ship => ship.isDisposed);
foreach(Invader ship in invaders)
{
ship.MoveInvader(this);
if (SpaceFighter.Bounds.IntersectsWith(ship.ship.Bounds))
{
// plays sound for exploding ship
System.Media.SoundPlayer SpaceshipSound = new System.Media.SoundPlayer(Properties.Resources.SpaceshipSound);
SpaceshipSound.Play();
timer2.Enabled = false;
timer3.Enabled = false;
timer4.Enabled = true;
invaders.Clear();
listBox1.Items.Add(lblScore.Text); // adds score to listbox
MessageBox.Show("You Lose!");
return;
}
}
// detects if an enemy ship his hit by a laser
lasers.RemoveAll(laser => laser.isDisposed);
foreach (Laser laser in lasers)
{
laser.MoveLaser(this);
foreach (Invader ship in invaders)
{
if (laser.laser.Bounds.IntersectsWith(ship.ship.Bounds))
{
laser.isDisposed = true;
laser.laser.Dispose();
ship.isDisposed = true;
ship.ship.Dispose(); // makes the ship dissappear once its shot
System.Media.SoundPlayer ShipSound = new System.Media.SoundPlayer(Properties.Resources.EnemySound); // sound for the enemy ship being destroyed
ShipSound.Play();
score = score + 2; //adds 2 points to players score if enemy is hit
lblScore.Text = score.ToString(); //updates the score label
invaderNumber = invaderNumber - 1;
}
}
}
foreach (Invader ship in invaders)
{
if (ship.ship.Top > 485)
{
ship.isDisposed = true;
ship.ship.Dispose();
invaderNumber = invaderNumber - 1;
}
}
}
private void btnStart_Click(object sender, EventArgs e)
{
timer1.Enabled = true; // activates timer 1
timer3.Enabled = true; // activates timer 3
btnStart.Visible = false; // hidesthe start button
lblScore.Text = "0"; // updates score label to 0 for start of game
lblName.Text = txtName.Text; // updates the name label to user nput
txtName.Visible = false; // hides the textbox
lblEnterName.Visible = false; // hides the enter name label
SpaceFighter.Visible = true; // makes the spacefighter visible
}
// code for the countdown clock
int m = 2;
int s = 60;
private void timer3_Tick(object sender, EventArgs e)
{
if(s > 0)
{
s = s - 1;
lblTimer.Text = "0" + m.ToString() + ":" + s.ToString();
}
if(s == 0)
{
s = 59;
m = m - 1;
lblTimer.Text = "0" + m.ToString() + ":" + s.ToString();
}
if(s < 10)
{
s = s - 1;
lblTimer.Text = "0" + m.ToString() + ":" + "0" + s.ToString();
}
if (m < 0)
{
listBox1.Items.Add(lblScore.Text + " " + lblName.Text); // adds score to list box
timer4.Enabled = true;
invaders.Clear();
}
if (m >= 0)
{
timer1.Enabled = true;
}
}
private void Form1_Load(object sender, EventArgs e)
{
SpaceFighter.Visible = false; // hides the space fighter until the player starts the game
listBox1.Visible = false; // keepsscore table hidden
lblScoreTable.Visible = false; // score table lables kept hidden
lblNameTable.Visible = false;
btnMenu.Visible = false;
}
private void Timer4_Tick(object sender, EventArgs e)
{
lblTimer.Text = "00:00"; // sets game timer to 00:00
timer3.Enabled = false; // disbales timer 3
listBox1.Visible = true; // makes score card visible
listBox1.Sorted = true;
lblNameTable.Visible = true; // displays score table labels
lblScoreTable.Visible = true;
btnMenu.Visible = true;
foreach (Invader ship in invaders)
{
ship.isDisposed = true;
ship.ship.Dispose();
}
}
private void BtnMenu_Click(object sender, EventArgs e)
{
// resets game to its original state in order to play another game
m = 2;
s = 60;
lblTimer.Text = "03:00";
timer1.Enabled = false;
timer2.Enabled = false;
timer3.Enabled = false;
timer4.Enabled = false;
listBox1.Visible = false;
lblNameTable.Visible = false;
lblScoreTable.Visible = false;
lblEnterName.Visible = true;
txtName.Visible = true;
SpaceFighter.Visible = false;
btnMenu.Visible = false;
btnStart.Visible = true;
score = 0;
lblScore.Text = "Score";
lblName.Text = "Name";
txtName.Clear();
invaderNumber = 0;
SpaceFighter.Top = 380;
SpaceFighter.Left = 400;
}
}
答案 0 :(得分：1)
这可以做到：
foreach (var control in this.Controls)
{
var pb = control as PictureBox;
if (pb != null)
{
if (pb.Name != "SpaceFighter")
{
pb.Dispose();
this.Controls.Remove(pb);
}
}
}
用于列表框排序：
using System.Collections;
ArrayList Sorting = new ArrayList();
foreach (var o in listBox1.Items)
{
Sorting.Add(o);
}
Sorting.Sort();
Sorting.Reverse();
listBox1.Items.Clear();
foreach (var o in Sorting)
{
listBox1.Items.Add(o);
}