说明：C sequence of All elements in the specified conditions, use the List sequence object to create the List personnel List, determine whether All staff are more than 30 years of age, dgpwC sequence of usage: bool result = People. All (p = > p.O ld > 30);Display the query results: label1. Text = "data source: {1," the king * ", 28}, {2, "zhao east", 31}, {3, king "*", 33} ";/ / data source label2. Text = "query expressions: All (p = > p.O ld > 30)";/ / query expression/operation label3. Text = "query result:" is the result. The ToString ();/ / the query results in more detail please download the source code.

说明：C XML file browser, use the DataSet to read XML documents, used to view the XML file contents of small procedures, can show different document nodes within the XML file, content, etc., in the form of more show XML file content.

说明：C pepper na sequence sum algorithm demo application, a test program, about the sequence of series summation, are for reference only.

说明：Visual C within the local area network (LAN) to specify the name of the machine/IP automatically send messages, finished half of the chat feature, this does not need too much trouble can achieve, Windows have the same function itself, but to demonstrate how to use the program in C, hereby writing this instance, implements the NETSEND similar function.

说明：C according to choose the DataGridView cell line data attached to achieve the source code, after connecting to the database, click on the upper part of the "show Selected cell line" function, can show the bank data, specific implementation code is as follows: private void toolStripButton1_Click (object sender, EventArgs e) {/ / show the Selected cell line (gets DataGridView control used in the Selected cell line) Int32 MyCount = customersDataGridView. Rows. GetRowCount (DataGridViewElementStates. Selected);If (MyCount > 0) {System. Text. StringBuilder MyInfo = new System. Text. StringBuilder ();For (int I = 0;I < MyCount;I) {MyInfo. Append (" selected line number is: ");MyInfo. Append (customersDataGridView SelectedRows [I] Index. The ToString ());MyInfo. Append (Environment. NewLine);} MyInfo. Append (" were chose: "MyCount. ToString ()" line.");MessageBox. Show (MyInfo. ToString (), "message", MessageBoxButtons. OK);}}

说明：C implementation taskbar tray icon procedures, support the right-click pop-up menu, many programs now have the function of automatically adds the tray icon, sometimes can facilitate users operating software, display to the tray of the programs are usually minimized.Sometimes, according to the needs of function, however, try not to take the computer task bar, maybe will let users, reduce use of experience.

说明：C DataBinding, DataView data binding instance, mainly for primary examples, such as how to use DataBinding, DataView display data, test data ACCESS, although very simple, but it is the basis of learning C database programming, so if you just learn C, these instances is worth you to learn.

说明：SQL version Winform C library management system, it is a big project, the client based on the Winform, in addition to server-side programs based on ASP.NET, two parts jointly run Microsoft. NET development platform for the perfect image management system, the other with complete technical documentation, such as: code specification (C). Doc, image management system function specification. Doc, detailed design specification. Doc, etc., seems to be available as a complete course design for reference.

说明：C imitation XP system taskbar menu, this is a very familiar with the function, familiar interface style, familiar with the menu, the XPMenu is not XPMenu controls, is just a copy write interface effect, running effect as shown.

说明：C water wave effect the source code, a simple C image processing effects, there will be water waves, water lines appear on the image, looks pretty good, will recommend source to all of you here.

说明：C production Calendar Calendar to choose functional paradigm, the realization of a small plug-in allows users to select a date time, this site has to share a lot of this module, search under C column "date picker can find similar to the source code," Calendar component running effect as shown in the figure below.

说明：C disable and enable Windows registry functions, Settings are allowed to modify the registry, if disable registry, is actually to save the registry, the user cannot modify the registry keys and all the registry data change operation, can make some target registry function optimization software.

说明：C DataGridView rows click add function code of color, was selected in the DataGridView control cell line in color, made of white change into other color, the color from already defined: private void Frm_Main_Load (object sender, EventArgs e) {dgv_Message. The DataSource = new List () {/ / bind data set new Fruit () {Name = "apple", Price = 30}, new Fruit () {Name = "orange", Price = 40}, new Fruit () {Name = "pears," Price = 33}, new Fruit () {Name = "peach", Price = 31}};Dgv_Message. Columns [0]. Width = 200;/ / set the column Width dgv_Message. Columns [1]. The Width = 170;. / / set the column width dgv_Message SelectionMode = / / set DataGridViewSelectionMode. How to choose the cell FullRowSelect;Dgv_Message. DefaultCellStyle. SelectionForeColor / / the foreground of the selected cell = Color. Blue.Dgv_Message. DefaultCellStyle. SelectionBackColor / / selected cell background Color = Color, LightYellow;}

说明：C copy write similar to Windows explorer, relatively coarse interface wrote some, not too much to optimize the interface, the program can automatically enumerate all the content of the disk system, each folder in a tree on the left, the right side of the display on the left side of the corresponding directory file contents, window cutting display, suitable for beginners to learn C.

说明：C Socket one-to-many asynchronous communication, a client or a server and multiple clients or server communication, asynchronous.A corresponding multiple server client.

说明：Visual C increase the Esc key to close the form in a window function, if press the Esc key, exit the application, by default, the window of the Windows is not press Esc to exit or closed, but on the WEB, a lot is to press Esc can be closed, or quit a certain function, such as WEB page full-screen playback video, can press the Esc key to exit full screen, this procedure is in the condition of Widnows window, press Esc to close the window function is equivalent to click the close button.

说明：C development WinForms version download program source code, support breakpoint continuingly, support multiple tasks at the same time download at the same time, each task can be multi-threaded download.From Winform interface, which can realize the following:

说明：C, design a simple window toolbar menus, toolbar button in the toolbar ICONS have text, can have any form toolbar, especially the application of the main window interface, are all need the toolbar to navigate its function, this example can help beginners C quick-and-dirty implementation method of the toolbar.

说明：C switch Windows input method, switched systems in the form of C their input method, the effect of the implementation as well as Windows's own input method to switch, just input method under the relevant C programming skills.The following is the main code: / / access to select input method InputLanguage mInput = InputLanguage. InstalledInputLanguages [comboBox1. SelectedIndex];/ / set the current input method InputLanguage CurrentInputLanguage = mInput;/ / get the current input information InputLanguage CurrentInput = InputLanguage. CurrentInputLanguage;This. The textBox1. Text = CurrentInput. LayoutName;This. / / to get input locale textBox3. Text = CurrentInput. Culture. The DisplayName;/ / the default input information InputLanguage dInput = InputLanguage. DefaultInputLanguage;This. TextBox2. Text = dInput. LayoutName;

说明：C to shadow show ListBox list control for ListBox display list control, increase the gradient shading, the result shown, shadow effect present outward diffusion gradient effect, implementation method is simple, for reference only.

说明：C simple maze game, with background music and the maze map editor, write C game, can consider there are many common game programming skills.As for the game is not introduced, believe a lot of friends familiar maze game.In the process of start the game, can control the background music playback, timely according to the game time.

说明：C primary basic file operations: examples of deleting files, including source code download, using the same DirectoryInfo Delete method in a class, this is the simplest way to Delete the file, the program after deleting files, using a MessageBox. Show in the pop-up dialog prompt.Interested can refer to the following code: the FileInfo finfo = new the FileInfo (" C: \ Test. TXT ");/ / Delete finfo specified file. The Delete ();MessageBox. Show (" the file was removed successfully!");

说明：C call SAP interface, for example, in the code, using System. The Data;/ / initialize the DataSet for the gridview;Using System. The Data. SqlClient.Calls the function name, set the parameters of the Import, i.e., the input parameters, performs functions, access to fields, will be content to fill in the data table, the gridControl1 here is based on a control DEV.

说明：It look like a mask animation, based on C WPF technology implementation, can see the image in this window, in turn around the show animation effects, can learn through this source code under the principle of WPF animation.

说明：Visual C implementation of music player, with a Visual effect, imitation MediaPlayer own Windows player, can play the video, audio, mp3 files, such as the core based on Windows MediaPlayer components, when writing the steps is not complicated.If (this. OptFile. FileName!= "optFile") {c = new WMPLib. WindowsMediaPlayerClass ();M = c.n ewMedia (enclosing optFile. FileName);MessageBox. Show (" singer name: "m.g etItemInfo (" Author")"

说明：C simulation to send a post request, using WeChat simulation, post request simulator.WebClient wc = new WebClient ();Wc. Headers. The Add (" the content-type ", "application/x - WWW - form - urlencoded");Byte [] postdata = Encoding. UTF8. GetBytes (poststr);Byte [] responseData = wc. UploadData (textBox3. Text, "POST", postdata);/ / get returns the character textBox2.. Text = Encoding UTF8. Get string (responseData);

说明：C print instance documents, the documents in this example is mainly format fixed express delivery of documents, can provide reference for friends who write paper print sample.Program can use templates to print, can realize: template Settings, express singles English express a single query, administrator, etc.

说明：C demonstration method to realize the inside connection query, this demo will connect used database, query to join query results show the end of the main operation is student achievement tables, student information sheet.

说明：C to generate animation window, move the location of the form

说明：Honeycomb war after engraving HiveBattle R.E. source code, compiled a pure C development of stand-alone game: cellular wars - flag mode, the author: wild than.Interface is pure and fresh, friendly operation, is a casual puzzle game, can choose to play against, the people and computer, people game three models are simple, normal, difficulties, running effect as shown in the screenshot.Is a filling type of game, fill into a certain shape.