C# Form.Update方法代码示例

		/// <summary>
		/// Gets an image snapshot of the specified control, which does not have to be
		/// mapped to a <see cref="System.Windows.Forms.Form"/> and does not have to be
		/// fully visible.
		/// </summary>
		/// <param name="control">The control to get an image snapshot of.</param>
		/// <returns>An image snapshot of the control.</returns>
		public static Image OffscreenGrab(Control control) {
			// Save the old parent and location.
			Control oldParent = control.Parent;
			Point oldLocation = control.Location;

			// Create a form offscreen
			Form transpForm = new Form();
			transpForm.StartPosition = FormStartPosition.Manual;
			transpForm.Location = new Point(Screen.PrimaryScreen.Bounds.Right + 10, 0);
			transpForm.ClientSize = new Size(control.Width + 10, control.Height + 10);

			// Make the form semi-transparent so windows turns on layering.
			transpForm.Opacity = .8;

			// Add the control.
			transpForm.Controls.Add(control);
			control.Location = new Point(0, 0);

			// Show the form (offscreen).
			transpForm.Show();
			transpForm.Visible = true;
			transpForm.Refresh();
			transpForm.Update();

			// Grab the control.
			Image img = GrabControl(control);

			// Put the control back on its original form.
			control.Parent = oldParent;
			control.Location = oldLocation;

			// Get rid of our temporary form.
			transpForm.Close();

			// Return the image.
			return img;
		}

        public static void InstallComShellExt(bool install, Form form, bool silent)
        {
            //Debug.Assert(false);
            if (!CSScriptInstaller.IsInstalled())
            {
                MessageBox.Show("Advanced Shell Extensions can be installed only after CS-Script configuration completed.\nPlease execute config.bat to configure the CS-Script.");
            }
            else
            {
                if (install)
                {
                    EnsureComShellExtensionPlacement();

                    DialogResult response = DialogResult.Yes;
                    if (!silent)
                    {
                        response = MessageBox.Show(form,
                                                    "You are about to install/activate additional Advanced Shell Extensions.\n" +
                                                    "\nPlease note that the structure of the shell extensions will follow the file structure of the\n" +
                                                    "'" + Path.GetDirectoryName(comShellEtxDLL32) + "' folder\n" +
                                                    "(See CS-Script documentation for details)\n" +
                                                    "\n" +
                                                    "Do you want to proceed with the installation?", "CS-Script", MessageBoxButtons.YesNo);

                        if (form != null)
                            form.Update();
                    }

                    if (DialogResult.Yes == response)
                    {
                        if (Directory.Exists(Environment.ExpandEnvironmentVariables(@"%windir%\SysWOW64")))
                        {
                            RunApp(Environment.ExpandEnvironmentVariables(@"%windir%\SysWOW64\regsvr32.exe"), (silent ? "/s \"" : "\"") + comShellEtxDLL32 + "\"");
                            RunApp(Environment.ExpandEnvironmentVariables(@"%windir%\System32\regsvr32.exe"), (silent ? "/s \"" : "\"") + comShellEtxDLL64 + "\"");
                        }
                        else
                        {
                            RunApp(Environment.ExpandEnvironmentVariables(@"%windir%\System32\regsvr32.exe"), (silent ? "/s \"" : "\"") + comShellEtxDLL32 + "\"");
                        }
                    }
                }
                else
                {
                    DialogResult response = DialogResult.Yes;
                    if (!silent)
                    {
                        response = MessageBox.Show("You are about to uninstall/deactivate additional Advanced Shell Extentions.\n" +
                                                    "\nPlease note that some files of '" + Path.GetDirectoryName(comShellEtxDLL32) + "'\n" +
                                                    "will be locked until Windows Explorer is restarted.\n" +
                                                    "\n" +
                                                    "Do you want to proceed with uninstallating?", "CS-Script", MessageBoxButtons.YesNo);

                        if (form != null)
                            form.Update();
                    }

                    if (DialogResult.Yes == response)
                    {
                        string dll = GetComShellExtRegisteredDll();

                        if (dll != null)
                        {
                            if (Directory.Exists(Environment.ExpandEnvironmentVariables(@"%windir%\SysWOW64")))
                            {
                                //dll will be the path to either ShellExt or ShellExt64 (depending which one registry search returns); both are in the same directory
                                string dll32 = dll.Replace("ShellExt64.", "ShellExt.");
                                string dll64 = dll.Replace("ShellExt.", "ShellExt64.");

                                RunApp(Environment.ExpandEnvironmentVariables(@"%windir%\SysWOW64\regsvr32.exe"), (silent ? "/s /u \"" : "/u \"") + dll32 + "\"");
                                RunApp(Environment.ExpandEnvironmentVariables(@"%windir%\System32\regsvr32.exe"), (silent ? "/s /u \"" : "/u \"") + dll64 + "\"");
                            }
                            else
                            {
                                RunApp(Environment.ExpandEnvironmentVariables(@"%windir%\System32\regsvr32.exe"), (silent ? "/s /u \"" : "/u \"") + dll + "\"");
                            }
                        }
                    }
                }
            }
        }

        protected bool TrackHandle(int nHandle,Control frm,Point point,Form frmClipTo)
        {
            Debug.Assert(nHandle >= 0);
            Debug.Assert(nHandle <= 8);   // handle 8 is inside the rect

            // don't handle if capture already set
            //if(frm.Capture) return false;

            Debug.Assert(!m_bFinalErase);

            // save original width & height in pixels
            int nWidth = m_rect.Width;
            int nHeight = m_rect.Height;

            // set capture to the window which received this message
            frm.Capture=true;
            Debug.Assert(frm.Capture);
            frm.Update();
            if (frmClipTo!=null)
                frmClipTo.Update();
            Rectangle rectSave = m_rect;

            // find out what x/y coords we are supposed to modify
            int px=0, py=0;
            int xDiff=0, yDiff=0;
            GetModifyPointers(nHandle,ref px,ref py,ref xDiff,ref yDiff,true);
            xDiff = point.X - xDiff;
            yDiff = point.Y - yDiff;

            // get DC for drawing
            Graphics gs;
            if (frmClipTo!=null)
            {
                // clip to arbitrary window by using adjusted Window DC
                gs=frmClipTo.CreateGraphics();
            }
            else
            {
                // otherwise, just use normal DC
                gs=frm.CreateGraphics();
            }

            Rectangle rectOld;
            bool bMoved = false;

            // get messages until capture lost or cancelled/accepted
            for (;;)
            {
                MSG msg=new MSG();
                if(GetMessage(ref msg, 0, 0, 0)!=1) break;
                if(!frm.Capture) break;

                switch (msg.message)
                {
                        // handle movement/accept messages
                    case WM_LBUTTONUP:
                    case WM_MOUSEMOVE:
                        rectOld = m_rect;
                        // handle resize cases (and part of move)
                        SetRectInt(px,LoWord(msg.lParam) - xDiff);
                        SetRectInt(py,HiWord(msg.lParam) - yDiff);
                        // handle move case
                        if (nHandle == (int)TrackerHit.hitMiddle)
                        {
                            m_rect.Width=nWidth;
                            m_rect.Height=nHeight;
                        }
                        // allow caller to adjust the rectangle if necessary
                        AdjustRect(nHandle,ref m_rect);

                        // only redraw and callback if the rect actually changed!
                        m_bFinalErase = (msg.message == WM_LBUTTONUP);
                        if (m_bFinalErase)
                            goto ExitLoop;

                        if (!rectOld.Equals(m_rect) || m_bFinalErase)
                        {
                            if (bMoved)
                            {
                                m_bErase = true;
                                DrawTrackerRect(rectOld, frmClipTo, gs, frm);
                            }
                            OnChangedRect(rectOld);
                            if (msg.message != WM_LBUTTONUP)
                                bMoved = true;
                        }
                        if (m_bFinalErase)
                            goto ExitLoop;

                        if (!rectOld.Equals(m_rect))
                        {
                            m_bErase = false;
                            DrawTrackerRect(m_rect, frmClipTo, gs, frm);
                        }
                        break;

                        // handle cancel messages
                    case WM_KEYDOWN:
                        if (msg.wParam != 0x1B)//VK_ESCAPE
                            break;
//.........这里部分代码省略.........

        public Updater(Form uForm, string uLocator, string uProgramName, string uVersionInfo, string uReplaceFile)
        {
            //uReplaceFile is empty => check for new version and download if necessary
            if (uReplaceFile == "")
            {
                //create update form
                uLabel.Size = new Size(400,20);
                uLabel.Text = "Checking for Updates...";
                uLabel.Location = new Point(10, 10);

                uPBar.Size = new Size(480, 30);
                uPBar.Location = new Point(10, 40);
                uPBar.Minimum = 0;
                uPBar.Maximum = 100;
                uPBar.Value = 1;

                uProgress.FormBorderStyle = FormBorderStyle.None;
                uProgress.Text = "Updater";
                uProgress.SetBounds(0, 0, 500, 80);
                uProgress.StartPosition = FormStartPosition.CenterScreen;
                //uProgress.ShowInTaskbar = false;

                uProgress.Controls.Add(uLabel);
                uProgress.Controls.Add(uPBar);

                uProgress.Show();
                uProgress.Update();

                // generate license key
                //string hw_key = generateKey();
                string hw_key = "null";

                // test the key
                if (testKey(hw_key) == false)
                {
                    MessageBox.Show("Could not fetch end user licence.", "Licence Error");
                    Environment.Exit(-1);
                }

                //check the version
                string uVersionOnline = uCheckVersion(uLocator, uVersionInfo);
                if (uVersionOnline != "")
                {
                    uPBar.Value = 30;
                    uProgress.Update();
                    //new update exists, ask for install
                    if (MessageBox.Show("New update available. Download & Install?", "Update", MessageBoxButtons.YesNo) == DialogResult.No)
                    {
                        //close form and exit
                        uProgress.Close();
                        return;
                    }
                    //uForm.ShowInTaskbar = false;
                    uForm.WindowState = FormWindowState.Minimized;
                    uForm.Update();

                    //yes, user wants to install it. Begin download
                    uLabel.Text = "Downloading ";
                    uProgress.Update();
                    Uri uUri = new Uri(uLocator + uProgramName + uVersionOnline + ".exe");
                    WebClient uDownloadClient = new WebClient();
                    uDownloadClient.CachePolicy = new System.Net.Cache.RequestCachePolicy(System.Net.Cache.RequestCacheLevel.NoCacheNoStore);

                    //add download progress event handlers
                    uDownloadClient.DownloadProgressChanged += new DownloadProgressChangedEventHandler(progressChanged);

                    uDownloadClient.DownloadFileCompleted += new AsyncCompletedEventHandler((EventHandler)delegate(object sender, EventArgs args)
                    {
                        progressCompleted(sender, uProgramName, uVersionOnline);
                    });

                    //does file exist?

                    WebRequest request = WebRequest.Create(uUri);
                    request.Method = "GET";

                    try
                    {
                        WebResponse response = request.GetResponse();
                    }
                    catch (WebException uWebEx)
                    {
                        //connection failed
                        uLabel.Text = "Cannot reach server: " + uWebEx.Status;
                        uPBar.Value = 100;
                        uProgress.Update();
                        System.Threading.Thread.Sleep(1000);
                        uProgress.Close();
                        uForm.WindowState = FormWindowState.Normal;
                        return;
                    }

            /*                    using ()
                    {
                        MessageBox.Show("here:" +response.ContentLength + "-" + response.ContentType);
                    }*/

                    //test if the file already exists in the folder and delete it...
                    System.IO.FileInfo uFile = new System.IO.FileInfo(uProgramName + uVersionOnline + ".exe");
                    try
//.........这里部分代码省略.........

//.........这里部分代码省略.........
			c = new Form ();
			c.Refresh ();
			Assert.IsFalse (c.IsHandleCreated, "A22");
			c.ResetBackColor ();
			Assert.IsFalse (c.IsHandleCreated, "A23");
			c.ResetBindings ();
			Assert.IsFalse (c.IsHandleCreated, "A24");
			c.ResetCursor ();
			Assert.IsFalse (c.IsHandleCreated, "A25");
			c.ResetFont ();
			Assert.IsFalse (c.IsHandleCreated, "A26");
			c.ResetForeColor ();
			Assert.IsFalse (c.IsHandleCreated, "A27");
			c.ResetImeMode ();
			Assert.IsFalse (c.IsHandleCreated, "A28");
			c.ResetRightToLeft ();
			Assert.IsFalse (c.IsHandleCreated, "A29");
			c.ResetText ();
			Assert.IsFalse (c.IsHandleCreated, "A30");
			c.SuspendLayout ();
			Assert.IsFalse (c.IsHandleCreated, "A31");
			c.ResumeLayout ();
			Assert.IsFalse (c.IsHandleCreated, "A32");
			c.Scale (new SizeF (1.5f, 1.5f));
			Assert.IsFalse (c.IsHandleCreated, "A33");
			c.Select ();
			Assert.IsTrue (c.IsHandleCreated, "A34");
			c.Dispose ();
			
			c = new Form ();
			
			c.SelectNextControl (new Control (), true, true, true, true);
			Assert.IsFalse (c.IsHandleCreated, "A35");
			c.SetBounds (0, 0, 100, 100);
			Assert.IsFalse (c.IsHandleCreated, "A36");
			c.Update ();
			Assert.IsFalse (c.IsHandleCreated, "A37");
			
			// Form
			
			c.Activate ();
			Assert.IsFalse (c.IsHandleCreated, "F1");
			
			c.AddOwnedForm (new Form ());
			Assert.IsFalse (c.IsHandleCreated, "F2");
			
			c.Close ();
			Assert.IsFalse (c.IsHandleCreated, "F3");
			
			c.Hide ();
			Assert.IsFalse (c.IsHandleCreated, "F4");
			
			c.LayoutMdi (MdiLayout.Cascade);
			Assert.IsFalse (c.IsHandleCreated, "F5");

#if !MONO
			c.PerformAutoScale ();
			Assert.IsFalse (c.IsHandleCreated, "F6"); 
#endif
			
			c.PerformLayout ();
			Assert.IsFalse (c.IsHandleCreated, "F7");
			
			c.AddOwnedForm (new Form ());
			c.RemoveOwnedForm (c.OwnedForms [c.OwnedForms.Length - 1]);
			Assert.IsFalse (c.IsHandleCreated, "F8");
			
			c.ScrollControlIntoView (null);
			Assert.IsFalse (c.IsHandleCreated, "F9");
			
			c.SetAutoScrollMargin (7, 13);
			Assert.IsFalse (c.IsHandleCreated, "F10");
			
			c.SetDesktopBounds (-1, -1, 144, 169);
			Assert.IsFalse (c.IsHandleCreated, "F11");
			
			c.SetDesktopLocation (7, 13);
			Assert.IsFalse (c.IsHandleCreated, "F12");

			c = new Form ();
			c.Show (null);
			Assert.IsTrue (c.IsHandleCreated, "F13");
			c.Close ();
			c = new Form (); 
			
			//c.ShowDialog ()
			
			c.ToString ();
			Assert.IsFalse (c.IsHandleCreated, "F14");
			
			c.Validate ();
			Assert.IsFalse (c.IsHandleCreated, "F15");

#if !MONO
			c.ValidateChildren ();
			Assert.IsFalse (c.IsHandleCreated, "F16"); 
#endif

			c.Close ();
		}

 private void StartProgress()
 {
     FDownload = new frmValidateRecordings();
     FDownload.Tag = DI;
     FDownload.Update();
     this.AddOwnedForm(FDownload);
     FDownload.Show();
 }

 public static void UpdateFonts(Form form)
 {
     foreach (Control c in form.Controls)
     {
         if (c is TextBox || c is DataGridView || c is ListBox)
         {
             c.Font = new Font(Properties.Settings.Default.Fonts[0], c.Font.Size);
             c.ForeColor = Color.Black;
         }
         else
         {
             c.Font = new Font(Main.GetFont(), c.Font.Size);
             if (c.Name != "bt_Exit" && c.Name != "bt_Back" && c.Name != "bt_Logout")
                 c.ForeColor = Main.GetColor();
         }
     }
     form.Update();
     form.Refresh();
 }

        // Delete the last line drawn on the Scratch Pad from collection.
        // Does NOT delete the line from the form itself, but calls Invalidate() & Update()
        // to force a repaint.
        public void DeleteLastLine(Form frmDraw)
        {
            // Retrieve count of LineGraphic objects in collection.
            int nLineGraphicCount = f_collLineGraphics.Count;

            // If not empty, delete last line added (drawn).
            if (nLineGraphicCount > 0)
            {
                // Delete last line from LineGraphic collection.
                f_collLineGraphics.RemoveAt(nLineGraphicCount - 1);

                // Invalidate entire screen area for repaint.
                frmDraw.Invalidate();

                // Force repaint.
                frmDraw.Update();
            }
        }

        /// <summary>
        /// Initialize the Windows... window. Attach Windows elements as well
        /// </summary>
        /// <returns>True if success, false otherwise</returns>
        protected bool InitMainWindow()
        {
            try
            {
                Window = new D3DForm
                {
                    Text = MainWindowCaption,
                    Name = "OutsideWndClassName",
                    FormBorderStyle = FormBorderStyle.Sizable,
                    ClientSize = new System.Drawing.Size(ClientWidth, ClientHeight),
                    StartPosition = FormStartPosition.CenterScreen,
                    MyWndProc = WndProc,
                    MinimumSize = new System.Drawing.Size(200, 200)
                };

                Window.MouseDown += OnMouseDown;
                Window.MouseUp += OnMouseUp;
                Window.MouseMove += OnMouseMove;
                Window.MouseWheel += OnMouseWheel;
                Window.ResizeBegin += (sender, args) =>
                {
                    AppPaused = true;
                    Resizing = true;
                    Timer.Stop();
                };
                Window.ResizeEnd += (sender, args) =>
                {
                    AppPaused = false;
                    Resizing = false;
                    Timer.Start();
                    OnResize();
                };

                Window.Show();
                Window.Update();
                return true;
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message + "\n" + ex.StackTrace, "Outside Engine - Error");
                return false;
            }
        }

        protected void CreateWindow(int width, int height)
        {
            Debug.Print("Application initiated");
            MainWindow = new Form {
                Width = width,
                Height = height,
                Text = GetName(),
                FormBorderStyle = FormBorderStyle.None
            };

            MainWindow.Show();
            MainWindow.Update();
            Input.Init(MainWindow);
        }