more visual basic net in 21 days

... theburden of being virtually a single parent while I was holed up in the office, pouring my best efforts into Sams Teach Yourself Database Programming with Visual C++6 in 21 Days Introduction ... Programming with Visual C++6 in 21 Days Introduction Simpo PDF Merge and Split Unregistered Version - http://www.simpopdf.com Trang 6Teach yourself Database Programmingwith Visual C++ 6 in 21 days Week ... perhaps called main.cpp, and enter the following code into it. Listing 1.1 C++ Code to Write Data to a File Teach Yourself Database Programming with Visual C++ 6 in 21 days Day 1-Choosing the Right

Ngày tải lên: 13/08/2014, 08:20

... shown Listing 4.2 Using ADO via #import In Listing 4.2, lines 1 and 2 define instances of two ADO smart pointer classes Lines 4 and 5 call the CreateInstance function of those smart pointer classes ... point); 56: } Line 3 defines a smart pointer to a Recordset class Lines 4 and 5 define and initialize a pointer to the MFC Document Line 6 constructs a _bstr_t that contains the SQL query string ... Programmingwith Visual C++ 6 in 21 days Day 5 Adding, Modifying, and Deleting Data Cursor Types in ADO Recordsets ● The ADO AddNew, Update,and Delete Functions The AddNew Function The SQL INSERT,

Ngày tải lên: 13/08/2014, 08:20

... table into the NewOrders table Youcan do this by using an INSERT INTO, and SELECT, statement, as shown in Listing 7.4 Listing 7.4 The INSERT INTO Statement for the NewOrders Table 1: INSERT INTO ... Trang 2Teach Yourself Database Programmingwith Visual C++ 6 in 21 days Tools and Techniques for Managing Relationships in a Relational Database Using Constraints to Enforce Relationships Today you ... 15Teach yourself Database Programmingwith Visual C++ 6 in 21 days Week 1 In Review The first day's lesson examines the different database technologies, including OLE structured storage, record

Ngày tải lên: 13/08/2014, 08:20

... namedmyFunc in myDerivedClass, which overrides myFunc in myBaseClass Lines 16-24 define the myFunc functions to simply output a string indicating that they are being executed.Line 28 defines an array ... array of four pointers to myBaseClass class Lines 29-32 initialize the pointers in thearray by creating alternating instances of myBaseClass and myDerivedClass Lines 39-42 delete theinstances of ... Functionbecause it will fail The DbComponent pointer defined in line 1 of Listing 9.4 is uninitialized Line 2 tries to use this uninitialized pointer to call the BeepIfDbIsOk function The code

Ngày tải lên: 13/08/2014, 08:20

... the Internet (more specifically, the World Wide Web) and also can be used in applications that run over a LAN in an intranet The term intranet is used to describe the application of Internet ... pretty lame user interface Listing 11.2 shows a typical model for displaying and processing database data in HTML. NOTE Teach Yourself Database Programming with Visual C++ 6 in 21 days Day 11-Multitier ... compiled into Windows EXEs and DLLs, without using COM interfaces As you discovered in Day 9, "Understanding COM," Windows EXEs and DLLs that don't support COM interfaces are invariably

Ngày tải lên: 13/08/2014, 08:21

... a single level of inheritance. Data in the database would look something like the data shown in Figure 13.5 Figure 13.5 : Data in a relational database schema that models a single level of inheritance. ... responsible for loading, unloading, and maintaining driver connections Your application would be responsible for every possible driver configuration available, includingthe data source definitions (Registry ... that it is still in its infancy and OLE DB providers for many databases are still in development With this in mind, it is easy to see the importance of understanding these legacy interfaces Who

Ngày tải lên: 13/08/2014, 08:21

... used an interface definition Generally, all interface definitions begin with IID Listing 16.2 references the IID_IDBInitialize interface identifier I will explain the OLE DB interfaces in detail ... Error handling in OLE DB isdiscussed in more detail on Day 21, "OLE DB Error Handling." The ISupportErrorInfo interface defines thestandard IUnknown interface methods QueryInterface, ... // Query for the interface 7: HRESULT hr = pInterface->QueryInterface(pIID, pChkInterface); Teach Yourself Database Programming with Visual C++ 6 in 21 days Day 17-Accessing a Data Source

Ngày tải lên: 13/08/2014, 08:21

... CreateAccessor, GetBindings, and ReleaseAccessor These methods are defined as follows: HRESULT GetBindings(HACCESSOR hAccessor, DBACCESSORFLAGS *pdwFlags, ULONG *pNumBindings, DBBINDING *prgBinding); HRESULT ... GetBindings method retrieves the data bindings associated withan Accessor I explain these methods in moredetail later today and again tomorrow (Day 19) The IColumnsInfo Interface The IColumnsInfo ... Release The interface provides two additional methods:CreateIndex and DropIndex, which are defined as follows: Teach Yourself Database Programming with Visual C++ 6 in 21 days Day 18-Querying a Data

Ngày tải lên: 13/08/2014, 08:21

... row set information continues by examining the more advanced aspects of data access and navigation: column types supported, handling these various types, defining and using cursors, using bookmarks, ... accessing a BLOB column as a single in-memory object isn't very difficult You can also access a BLOB column by using the OLE streaming interfaces Day 20 covers these interfaces in more detail, including ... object for managing record locking and sharing in a multiuser environment Day 20 covers the Transaction object in more detail. Modify the application in Listing 19.4 to display schema information

Ngày tải lên: 13/08/2014, 08:21

... Database Programmingwith Visual C++ 6 in 21 days © Copyright , Sams Publishing All rights reserved. Teach yourself Database Programming with Visual C++ 6 in 21 days Appendix C-Installing the Microsoft ... Database Programmingwith Visual C++ 6 in 21 days ADOMFC1: A Visual C++ project that uses MFC and ADO It is a database client application that you begin working on in Day 4 DataProject1: A Visual Studio ... the ISQLErrorInfo interface by using the GetCustomErrorObjectmethod of the IErrorRecord interface The ISQLErrorInfo interface defines a single method: GetSQLInfo Thismethod is defined as follows:

Ngày tải lên: 13/08/2014, 08:21

... in the dialog window The last thing that you do is to start thetimer, specifying the ID_COUNT_TIMERID and using the interval from the m_iInterval variable L ISTING 4.7 CONTINUED Trang 19Working ... following steps:1 Edit the OnInitDialogfunction, updating the code as in Listing 4.4 L ISTING 4.4 THE UPDATED OnInitDialog FUNCTION 1: BOOL CTimersDlg::OnInitDialog() 2: { 3: CDialog::OnInitDialog(); ... placing the timer code in the OnTimer function However, sometimes you need more than one timer running simultaneously inthe same application Then things get a little bit more involved Adding

Ngày tải lên: 13/08/2014, 18:20

... adding the code in Listing 8.6 to the function created inyour class mes-L ISTING 8.6 THE OnPaint FUNCTION 1: void CPaintDlg::OnPaint() 2: { 3: CPaintDC dc(this); // device context for painting ... as DrawRegion(CPaintDC *pdc, int iColor, int iTool, int iShape), and the access as private Edit the code in thisfunction, adding the code in Listing 8.7 F IGURE 8.4 Drawing lines on the second ... OnPaintfunction, addinglines 15 through 18 from Listing 8.11 Trang 36L ISTING 8.11 THE MODIFIED OnPaint FUNCTION 1: void CPaintDlg::OnPaint()2: { 3: CPaintDC dc(this); // device context for painting

Ngày tải lên: 13/08/2014, 18:20

... function declarations in Listing 11.1 before the line that you searched for (The string that you searched for is the beginning marker for the Class Wizardmaintained message map Anything you place between ... shown in Figure 12.4 You’ll need to add the strings to be placed into your toolbar combo box in the string table; each line in the drop-down listmust have a unique ID and entry in the strings ... table In the String properties dialog, specify a string ID for the string and then enter the string to appear in the drop-down list Close the properties dialog to add the string For thestrings in

Ngày tải lên: 13/08/2014, 18:20

... enters changes to the data in the controls on the screen, these changessomehow need to make their way into the current record in the document If you aremaintaining a pointer in the view object to ... be includedbefore the header files for either the document or view classes For your sample applica-tion, you edit the Serialize.cppfile, adding line 8 in Listing 13.28 L ISTING 13.28 INCLUDING ... using the Wizards inVisual C++ ● How you can add and delete records from an ODBC database in VisualC++ Trang 16Database Access and ODBCMost business applications work with data They maintain,

Ngày tải lên: 13/08/2014, 18:20

... NewDrawingfunction in the drawing class, increasing the modulusvalue in line 7 of the function, as in Listing 16.15 This will increase the number of pos-sible squiggles in a single drawing from ... be included in a drawing, next you want to increase the number of line segments that may be in a squiggle To do this, edit theNewLinefunction and increase the modulus number on line 20 in Listing ... determining howmany of these squiggles will be in the final drawing Edit the new function with the code in Listing 16.2 L ISTING 16.2 THE CModArt NewLine FUNCTION 1: void CModArt::NewLine() 2:

Ngày tải lên: 13/08/2014, 18:20

... LISTING 19.4 THE MODIFIED CModArt NewDrawing FUNCTION 1: void CModArt::NewDrawing() 2: { 3: int lNumLines;... Microsoft building networking capabilities into its operating systems, starting with ... application was closing, the threads were continuing to run. When these threads checked the value of the variable indicating whether to continue running or spin their spinners, they were trying to access ... argument to a pointer to the 4: // spinner for this thread 5: CSpinner* lpSpin = (CSpinner*)pParam; 6: // Get a pointer to the continuation flag 7: BOOL* pbContinue = lpSpin->GetContinue(); 8:

Ngày tải lên: 13/08/2014, 18:20

... an initializationmethod Theinitializationin the carclass overrides the base class initialization Last but notleast is the main()definition The main()method is defined in Allauto.cppin ListingA.18 ... that on line 7 when youdefined the main()function, you defined its return type to be an integer (int) You mayrerun this code by deleting the return statement on line 10, in which case line 7 wouldhave ... technique of initializing the data members in the constructor declaration (as shown on line 11 of Listing A.14) is far more efficient due to the internal initialization of classes in C++ Use this

Ngày tải lên: 13/08/2014, 18:20

... Const PI As Double = 3.14159265 Label1.Text = PI 8. Làm việc với toán tử trong VISUAL BASIC. NET Visual Basic. NET cung cấp các toán tử cơ bản sau: Toán tử Mô tả + Phép cộng - Phép trừ * Nhân / ... tử trong vb .net Chương 5: Biến và toán tử trong VISUAL BASIC. NET oOo Nội dung thảo luận: - Sử dụng biến để chứa dữ liệu của chương trình - Nhận dữ liệu nhập bằng cách sử dụng hàm InputBox - ... dẫn lập trình VB .NET Chương 5: Biến và toán tử trong vb .net - Tạo thủ tục ListBox1_SelectedIndexChanged để hiện thông tin trên TextBox1 như sau: Select Case ListBox1.SelectedIndex Case 0 TextBox1.Text...

Ngày tải lên: 18/08/2012, 08:56

... + Điểm thuận lợi của Visual Basic. Net: -Visual Basic. Net hỗ trợ các cấu tử lớp, mang tính thừa kế thực thi, tính đa thể cổ điển, và quá tử phương pháp. -Visual Basic. Net cho phép các nhà lập ... TẮT CNTT : công nghệ thông tin GV : giáo viên HS : học sinh VB .Net : Visual Basic. Net ICT : information and communication technology – Công nghệ thông tin và truyền thông PP : phương ... bằng phần mềm Access và Visual Basic sẽ trình bày cụ thể trong chương 2. cùng với Visual C#, Visual C++, Visual J# hợp thành ngôn ngữ lập trình mới Visual Studio .Net. + Chương trình hay còn...

Ngày tải lên: 30/01/2013, 14:14

... * ERROR at line 1: ORA-00936: missing expression The asterisk under the offending line indicates where Oracle7 thinks the offense occurred. The error message tells you that something is missing. That ... operating systems that can interoperate as long as they share a common network protocol ● Improved data integrity owing to centralized data location In Implementing Client/Server Computing, ... powerful calculations in a SELECT statement. Modulo (%) The modulo operator returns the integer remainder of the division operation. Using the table REMAINS, type the following: INPUT: SQL> SELECT...

Ngày tải lên: 06/08/2013, 17:39