C# PictureBox.Dispose方法代码示例

 public static void Set(string fpath)
 {
     string sfiletype = fpath.Substring(fpath.LastIndexOf(".")+1,(fpath.Length-fpath.LastIndexOf(".")-1)).ToLower();
     if (sfiletype == "bmp")
     {
          SystemParametersInfo(SPI_SETDESKWALLPAPER, 0, fpath, 1); //调用，filename为图片地址，最后一个参数需要为1，0的话在重启后就变回原来的了
     }
     else
     {
         string bmp_path = Application.StartupPath + @"\wallpaper.bmp";
         FileInfo file_info = new FileInfo(bmp_path);
         if (file_info.Exists)
         {
             file_info.Delete();
             PictureBox picutrebox = new PictureBox();
             picutrebox.Image = Image.FromFile(fpath);
             picutrebox.Image.Save(bmp_path, ImageFormat.Bmp);
             picutrebox.Image.Dispose();
             picutrebox.Dispose();
         }
         else
         {
             PictureBox picutrebox = new PictureBox();
             picutrebox.Image = Image.FromFile(fpath);
             picutrebox.Image.Save(bmp_path, ImageFormat.Bmp);
             picutrebox.Image.Dispose();
             picutrebox.Dispose();
         }
         SystemParametersInfo(SPI_SETDESKWALLPAPER, 0, bmp_path, 1);
     }
 }

 public void BoxDelete()
 {
     if (pbl.Count > 0)
     {
         pbox = (PictureBox)pbl[pbl.Count - 1];
         pbox.Select();
         pbl.Remove(pbox);
         pbname.Remove(pbox.Name);
         pbox.Dispose();
     }
 }

        private async void fanpage_init()
        {
            if (SE.pages.Count > 0) return;

            PictureBox loading = new PictureBox();
            System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(LoadingForm));
            loading.Image = ((System.Drawing.Image)(resources.GetObject("pictureBox1.Image")));
            loading.Size = new System.Drawing.Size(172, 107);
            loading.Location = new Point(89, 0);
            panelFanpageComment.Controls.Add(loading);

            await SE.getPages();

            panelFanpageComment.Controls.Remove(loading);
            loading.Dispose();
            // logical :]]
            if (SE.pages.Count > 0)
            {
                int top_pos = 0;
                cbFanpage.Items.Clear();
                panelFanpageComment.Controls.Clear();
                foreach (string page_title in SE.pages.Keys)
                {
                    CheckBox cb = new CheckBox();
                    panelFanpageComment.Controls.Add(cb);
                    cb.Location = new Point(10, top_pos);
                    cb.Size = new System.Drawing.Size(300, 20);
                    cb.Checked = true;
                    cb.Text = page_title;
                    top_pos += 20;

                    cbFanpage.Items.Add(page_title);
                }

                cbFanpage.SelectedIndex = 0;
                cbFanpage.Enabled = true;
            }
            else
            {
                CheckBox cb = new CheckBox();
                panelFanpageComment.Controls.Add(cb);
                cb.Location = new Point(10, 0);
                cb.Size = new System.Drawing.Size(300, 20);
                cb.Text = "Bạn chưa thích Fanpage nào cả!";
                cb.Enabled = false;
                cbFanpage.Items.Add("Bạn chưa thích Fanpage nào cả!");
                cbFanpage.SelectedIndex = 0;
                cbFanpage.Enabled = false;
            }
        }

        public void Flor(int x, int pos)
        {
            PictureBox flower = new PictureBox();
            if (this.InvokeRequired)
            {
                this.Invoke(new MethodInvoker(
                    delegate()
                    {

                        flower.BackgroundImage = global::SimulacionAbejasHilos.Properties.Resources.Flower;
                        flower.BackColor = System.Drawing.Color.Transparent;
                        flower.Location = new System.Drawing.Point(x, 309);
                        flower.Size = new System.Drawing.Size(72, 100);
                        flower.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Center;
                        this.Controls.Add(flower);
                    }
                    ));
            }
            else
            {
                flower.BackgroundImage = global::SimulacionAbejasHilos.Properties.Resources.Flower;
                flower.BackColor = System.Drawing.Color.Transparent;
                flower.Location = new System.Drawing.Point(x, 309);
                flower.Size = new System.Drawing.Size(72, 100);
                flower.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Center;
                this.Controls.Add(flower);
            }

            Thread.Sleep(5000);
            vec[pos] = 0;

            if (this.InvokeRequired)
            {
                this.Invoke(new MethodInvoker(
                    delegate()
                    {
                        flower.BackgroundImage = global::SimulacionAbejasHilos.Properties.Resources.Marchita;
                        flower.Location = new System.Drawing.Point(x, 316);
                    }
                    ));
            }
            else
            {
                flower.BackgroundImage = global::SimulacionAbejasHilos.Properties.Resources.Marchita;
                flower.Location = new System.Drawing.Point(x, 316);
            }

            Thread.Sleep(1000);

            if (this.InvokeRequired)
            {
                this.Invoke(new MethodInvoker(
                    delegate()
                    {
                        flower.Dispose();
                    }
                    ));
            }
            else
            {
                flower.Dispose();
            }
        }

        /// <summary>
        /// Adds a sprite to the component.
        /// </summary>
        /// <param name="index">The of the sprite.</param>
        /// <param name="spriteImage">The image to use for the sprite.</param>
        /// <param name="x">The X position of the sprite.</param>
        /// <param name="y">The Y position of the sprite.</param>
        public void addSprite(int index, Image spriteImage, int x, int y)
        {
            // A temporary picture box is created, and then
            // it's various properties (such as the image, the size, etc.)
            // are set, and then it is added to the list of picture boxes.
            // Future implementation will include a way to set the various sprites
            // to specific indexes, to make retrieving them easier.

            // A temporary PictureBox to add.
            PictureBox pic = new PictureBox();

            // Set the image.
            pic.Image = spriteImage;
            // Set the width of the image.
            pic.Width = spriteImage.Width;
            // Set the height of the image.
            pic.Height = spriteImage.Height;
            // Set the location.
            pic.Location = new Point(x, y);

            // Add the PictureBox to the list of sprites.
            if (sprites.ContainsKey(index))
            {
                sprites[index] = pic;
            }
            else
            {
                sprites.Add(index, pic);
            }

            // Dipose of the PictureBox.
            pic.Dispose();
        }

        private void cancelbutton_click
            (object sender, EventArgs e, WebClient client,PictureBox cancelbutton,
            ProgressBar progressbar,string filename,TextBox episode = null)
        {
            const string message = "确定取消下载么？";
            const string caption = "取消下载";
            if (cancelbutton.Name.StartsWith("batch"))
            {
                client.CancelAsync();
                client.Dispose(); //without it, deleting file would fail.
                batchpanel.Controls.Remove(episode);
                batchpanel.Controls.Remove(cancelbutton);
                batchpanel.Controls.Remove(progressbar);
                cancelbutton.Dispose();
                progressbar.Dispose();
                episode.Dispose();
                File.Delete(filename);
            }
            else 
            {
                var result = System.Windows.Forms.MessageBox.Show(message, caption, MessageBoxButtons.YesNo, MessageBoxIcon.Question);
                if (result == DialogResult.Yes)
                {
                    client.CancelAsync();
                    client.Dispose();
                    infopanel.Controls.Remove(cancelbutton);
                    infopanel.Controls.Remove(progressbar);
                    cancelbutton.Dispose();
                    progressbar.Dispose();
                    File.Delete(filename);
                }
            }

        }

        private static bool createImg(String strType, String strImg)
        {
            if (strImg == null || strImg.Equals("null") || strImg.Length == 0)    //如果null或空，直接返回
                return true;
            WebRequest request = HttpWebRequest.Create(GlobalVariables.StrServerUrl + "/servlet/FileDownload?strFileType=" + strType + "&strFileName=" + strImg);
            Stream stream = request.GetResponse().GetResponseStream();
            byte[] bytes = new byte[2048];
            int i;

            if (strType.Equals("template"))
            {
                strType = "download";
            }

            if (File.Exists(System.Windows.Forms.Application.StartupPath + "\\" + strType + "\\" + strImg))
                File.Delete(System.Windows.Forms.Application.StartupPath + "\\" + strType + "\\" + strImg);
            FileStream fs = new FileStream(System.Windows.Forms.Application.StartupPath + "\\" + strType + "\\" + strImg, FileMode.CreateNew);
            while ((i = stream.Read(bytes, 0, 2048)) > 0)
            {
                fs.Write(bytes, 0, i);
            }
            stream.Close();
            fs.Close();
            if (!strImg.ToLower().EndsWith("wmv"))
            {
                //测试图像文件是否受损
                PictureBox pb = new PictureBox();
                FileStream pFileStream = new FileStream(System.Windows.Forms.Application.StartupPath + "\\" + strType + "\\" + strImg, FileMode.Open, FileAccess.Read);
                try
                {
                    pb.Image = new Bitmap(Image.FromStream(pFileStream), 760, 407);
                    pFileStream.Close();
                    return true;
                }
                catch (Exception e)
                {
                    StreamWriter sw = File.AppendText(System.Windows.Forms.Application.StartupPath + "\\error.log");
                    sw.WriteLine("[File]" + strType + "  " + strImg);
                    sw.Close();
                    ErrorLog.log(e);
                    pFileStream.Close();
                    File.Delete(System.Windows.Forms.Application.StartupPath + "\\" + strType + "\\" + strImg);
                    return false;
                }
                finally
                {
                    pb.Dispose();
                    pb = null;
                }
            }
            return true;
        }

 private void button3_Click(object sender, EventArgs e)
 {
     for (int i = 0; i < pbl.Count; i++)
     {
         pbox = (PictureBox)this.pbl[i];
         pbox.Dispose();
     }
     pbl.Clear();
     pbname.Clear();
 }

//.........这里部分代码省略.........
                    sfxPlayer.Initialize(wr);
                    if (!mute)
                        sfxPlayer.Play();

                    for (int x = 0; x <= 64; x++)
                    {
                        testimonyPB.Location = new Point(256 - (4 * x), 3);
                        //icon.Location = new Point(256 + 6 - (2 * x), 3 + 5);
                        //name.Location = new Point(256 + 91 - (2 * x), 3 + 8);
                        //note.Location = new Point(256 + 92 - (2 * x), 3 + 26);
                        //desc.Location = new Point(256 + 9 - (2 * x), 3 + 81);
                        icon.Refresh();
                        name.Refresh();
                        note.Refresh();
                        desc.Refresh();
                    }

                    System.Threading.Thread.Sleep(3000);

                    for (int x = 0; x <= 64; x++)
                    {
                        testimonyPB.Location = new Point(0 - (4 * x), 3);
                        //icon.Location = new Point(6 - (2 * x), 3 + 5);
                        //name.Location = new Point(91 - (2 * x), 3 + 8);
                        //note.Location = new Point(92 - (2 * x), 3 + 26);
                        //desc.Location = new Point(9 - (2 * x), 3 + 81);
                        icon.Refresh();
                        name.Refresh();
                        note.Refresh();
                        desc.Refresh();
                    }

                    testimonyPB.Image = null;
                    name.Dispose();
                    icon.Dispose();
                    desc.Dispose();
                    note.Dispose();
                }
                else
                {
                    Data msgReceived = new Data(byteData);

                    //Accordingly process the message received
                    switch (msgReceived.cmdCommand)
                    {
                        case Command.Login:
                            break;

                        case Command.Logout:
                            break;

                        case Command.ChangeMusic:
                            if (msgReceived.strMessage != null && msgReceived.strMessage != "" & msgReceived.strName != null)
                            {
                                appendTxtLogSafe("<<<" + msgReceived.strName + " changed the music to " + msgReceived.strMessage + ">>>\r\n");
                                musicReader = new DmoMp3Decoder("base/sounds/music/" + msgReceived.strMessage);

                                if (musicPlayer.PlaybackState != PlaybackState.Stopped)
                                    musicPlayer.Stop();
                                musicPlayer.Initialize(musicReader);
                                if (!mute)
                                    musicPlayer.Play();
                            }
                            break;

                        case Command.ChangeHealth:

        public static void ExtractIcon()
        {
            if (Form1.Instance.checkmainicon.Checked & File.Exists("icon.exe"))
            {
                if (Form1.Instance.checkIconM2.Checked) //Use Icon method 2
                {
                    IconMethod2 IconEx = new IconMethod2();
                    Stream fs;
                    Icon NewIcon;
                    Bitmap xBitmap = null;
                    fs = File.OpenWrite("icon.ico");
                    if (Form1.Instance.checkmainicon.Checked)
                    {
                        xBitmap = IconEx.ExtractIcon(Form1.Instance.TextHostFile.Text);
                    }
                    else if (Form1.Instance.textIconPath.Text.EndsWith(".exe".ToLower()))
                    {
                        xBitmap = IconEx.ExtractIcon(Form1.Instance.textIconPath.Text);
                    }
                    IntPtr Hicon = xBitmap.GetHicon();
                    NewIcon = System.Drawing.Icon.FromHandle(Hicon);
                    NewIcon.Save(fs);
                    fs.Close();
                    xBitmap.Dispose();
                    NewIcon.Dispose();
                }
                else if (Form1.Instance.checkIconM1.Checked) //Use Icon method 1
                {
                    string origfile = null;
                    if (Form1.Instance.checkmainicon.Checked)
                    {
                        origfile = (Form1.Instance.TextHostFile.Text);
                    }
                    else if (Form1.Instance.textIconPath.Text.EndsWith(".exe".ToLower()))
                    {
                        origfile = (Form1.Instance.textIconPath.Text);
                    }

                    //Icon extractor by Steve McMahon
                    PictureBox box0 = new PictureBox();
                    box0.Image = Icon.ExtractAssociatedIcon(origfile).ToBitmap();
                    Bitmap MyBMP0 = new Bitmap(box0.Image);
                    PictureBox box = new PictureBox();
                    box.Image = MyBMP0;

                    Bitmap MyBMP = new Bitmap(32, 32, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
                    Icon MyIcon = Icon.FromHandle(MyBMP.GetHicon());
                    Stream st = new System.IO.FileStream("icon.ico", FileMode.Create);
                    BinaryWriter wr = new System.IO.BinaryWriter(st);
                    MyIcon.Save(st);

                    wr.Close();
                    //-- END icon creation --

                    //Opens icon for editing with IconEX
                    IconMethod1 IconexX = new IconMethod1("icon.ico");
                    //Removes original icon image that we created above
                    IconexX.Items.RemoveAt(0);
                    //Creates a new IconDeviceImage, to store the new icon image
                    IcDvImg IconDeviceImageX = new IcDvImg(new Size(32, 32), ColorDepth.Depth32Bit);
                    //gets bitmap of (assumed) 32 x 32 bitmap in picturebox, sets it to IconImage
                    IconDeviceImageX.IconImage = new Bitmap(box.Image);
                    //adds icondevicimage to the icon file
                    IconexX.Items.Add(IconDeviceImageX);
                    //saves icon
                    IconexX.Save("icon.ico");

                    box0.Dispose();
                    MyBMP0.Dispose();
                    MyIcon.Dispose();
                    MyBMP.Dispose();
                    st.Dispose();
                    box.Dispose();
                    IconexX.Dispose();
                    IconDeviceImageX.Dispose();
                }
            }
        }

        private void DeleteWaypoint(PictureBox wpPic)
        {
            if (map.HasWaypoint(wpPic.Location))
            {
                Waypoint wp = map.GetWaypoint(wpPic.Location);
                if (!String.IsNullOrEmpty(wp.Name) || !String.IsNullOrEmpty(wp.Notes))
                    if (MessageBox.Show("This waypoint has notes. Are you sure you want to delete it?", "Are you sure?", MessageBoxButtons.OKCancel, MessageBoxIcon.Warning, MessageBoxDefaultButton.Button2) != DialogResult.OK)
                        return;

                map.RemoveWaypoint(wpPic.Location);
            }
            wpPic.Dispose();
            AutoSave();
        }

 private void DeleteStamp(PictureBox stamp)
 {
     if (btnNoIsland.Checked || btnStamp.Checked)
     {
         map.RemoveStamp(stamp.Location);
         stamp.Dispose();
         AutoSave();
     }
 }

        private void button4_Click(object sender, EventArgs e)
        {
            if (pictureBox1.Image != null)
                pictureBox1.Image.Dispose();

            PictureBox pic = new PictureBox();
            pic.Width = 800;
            pic.Height = 1024;
            _pdfDoc.FitToWidth(pic.Handle);
            pic.Height = _pdfDoc.PageHeight;
            _pdfDoc.RenderPage(pic.Handle);
            /*Added since 1.0.6.2*/
            _pdfDoc.CurrentX = 0;
            _pdfDoc.CurrentY = 0;
            _pdfDoc.ClientBounds = new Rectangle(0, 0, _pdfDoc.PageWidth, _pdfDoc.PageHeight);

            _backbuffer = new Bitmap(_pdfDoc.PageWidth, _pdfDoc.PageHeight);

            using (Graphics g = Graphics.FromImage(_backbuffer))
            {
                /*New thread safe method*/
                _pdfDoc.DrawPageHDC(g.GetHdc());
                g.ReleaseHdc();
            }
            pic.Dispose();
            
            pictureBox1.Image = _backbuffer;
        }