a programmers guide to ado net in c

... .NET, you can create a connection component in many ways. You can use the IDE to add a connection object to a project, create it programmatically, or use data adapters that automatically create ... manages SQL Server database connections. • OdbcConnection creates and manages connections to ODBC data sources. • OleDbConnection creates and manages connections to an OLE-DB data sources. In ... this.sqlInsertCommand1; this.sqlDataAdapter1.SelectCommand = this.sqlSelectCommand1; Please break up code. this.sqlDataAdapter1.TableMappings.AddRange (new System.Data.Common.DataTableMapping[] {new System.Data.Common.DataTableMapping (“Table”,...

Ngày tải lên: 22/03/2014, 18:20

... Main() function uses both constructors: one to create an instance from an x and y value, and another to create an instance from an already-existing instance. 6 When an overloaded function is called, ... to prevent unintended derivation: // error sealed class MyClass { MyClass() {} } class MyNewClass : MyClass { } This fails because MyNewClass can’t use MyClass as a base class because MyClass ... CHAPTER 4 ■ BASE CLASSES AND INHERITANCE 27 The CalculateCharge() and TypeName() functions are now declared with the virtual keyword in the base class, and that’s all that the base class has...

Ngày tải lên: 31/03/2014, 16:40

... are ASCII char- acters. Variables that are ASCII characters are declared using the keyword char. Example code using an ASCII character is shown below. ✞ 1 #include <iostream> 2 3 int main(int ... “zero-based indexing”. Elements of an array are accessed by placing the indices in separate square brack- ets, and so we may completely populate the arrays array1 and array2 declared above using ... they can be compiled to a machine code program which is able to use the full power of the available hardware. Many scripting languages (such as M ATLAB and Python) are interpreted languages, meaning...

Ngày tải lên: 19/03/2014, 14:12

... Public understanding and acceptance of changing fuel prices can be encouraged by regularly publishing information such as price surveys, comparisons of domestic and international prices, historical and current ... eliminated can also ease the transition to market prices and build public support for reform. Good practice includes a clear communications campaign, stakeholder consultation, transparency about ... | A CITIZENS’ GUIDE TO ENERGY SUBSIDIES IN INDONESIA 4. Endnotes 1 LKPP: Laporan Keuangan Pemerintah Pusat (Central Government Financial Report); APBN: Anggaran Pendapatan Belanja Negara (Annual...

Ngày tải lên: 22/03/2014, 15:20

Ngày tải lên: 14/08/2014, 13:20

Ngày tải lên: 14/08/2014, 13:20

Ngày tải lên: 14/08/2014, 13:20

Ngày tải lên: 14/08/2014, 13:20

Ngày tải lên: 14/08/2014, 13:20

Ngày tải lên: 14/08/2014, 13:20

Ngày tải lên: 14/08/2014, 13:20

Ngày tải lên: 14/08/2014, 13:20

Ngày tải lên: 14/08/2014, 13:20

... stipulate any particular characters set, although in gen- eral a character set that contains the ASCII code (American Standard Code for Informa- tion Interchange) is used. This 7-bit code contains ... storage is sufficient for extended character sets, for example, the ANSI char- acter set that contains the ASCII codes and additional characters such as German umlauts. The wchar_t (wide character ... are: ■ data abstraction, that is, the creation of classes to describe objects ■ data encapsulation for controlled access to object data ■ inheritance by creating derived classes (including multiple...

Ngày tải lên: 05/03/2014, 17:20

... type. ᮀ Character Constants A character constant is a character enclosed in single quotes. Character constants take the type char. EXAMPLE: &apos ;A& apos; // Type: char The numerical value is the character ... literal 5.19 0.519E1 0.0519e2 519.OE-2 12. 12.0 .12E+2 12e0 0.75 .75 7.5e-1 75E-2 0.00004 0.4e-4 .4E-4 4E-5 Constant Character Constant Value (ASCII code decimal) Capital A Lowercase a Blank Dot Digit 0 Terminating null character 65 97 32 46 48 0 &apos ;A& apos; &apos ;a& apos; ' ' '.' '0' '\0' Chapter ... codes. The C+ + language does not stipulate any particular characters set, although in gen- eral a character set that contains the ASCII code (American Standard Code for Informa- tion Interchange)...

Ngày tải lên: 19/03/2014, 14:10

... 150 Chapter 9 The Standard Class string 153 Defining and Assigning Strings 154 Concatenating Strings 156 Comparing Strings 158 Inserting and Erasing in Strings 160 Searching and Replacing in Strings ... characters in 24 languages. 28 ■ CHAPTER 2 FUNDAMENTAL TYPES, CONSTANTS, AND VARIABLES ■ NAMES Keywords in C+ + Examples for names asm auto bool break case catch char class const const_cast continue default delete do double dynamic_cast else enum explicit extern false float for friend goto if inline int long mutable namespace new operator private protected public register reinterpret_cast return short signed sizeof static static_cast struct switch template this throw true try typedef typeid typename union unsigned using virtual void volatile wchar_t while valid: a ... particular characters set, although in gen- eral a character set that contains the ASCII code (American Standard Code for Informa- tion Interchange) is used. This 7-bit code contains definitions...

Ngày tải lên: 27/06/2014, 12:20

... 9 Static arrays, 325 Static binding, 551 Static data members, 304, 305 accessing, 306 declaring, 305 definition and initialization, 305 and encapsulation, 307 Static data structures, 463 Static ... literal internal representation of, 24 Strings characters accessed in, 164 comparing, 158 concatenating, 156, 157 escape sequences used in, 29 initializing, 154, 155 inserting and erasing in, 160, ... 358 and return pointers, 363 Stream access errors, 651 Stream class shift operators, 229 streambuf class, 48 Streams, 9 discovering/changing status of, 645 standard, 59 standard exception handling...

Ngày tải lên: 06/07/2014, 17:21

... within class hierarchies, which occurs in the context of assignments and function calls. Explicit type casting in class hierar- chies is also described, paying particular attention to upcasting and ... introduced. Chapter 26 describes how defining pure virtual methods can create abstract classes and how you can use abstract classes at a polymorphic interface for derived classes. To illustrate ... downcasting. Chapter 25 gives a complete explanation of how to develop and manage polymorphic classes. In addition to defining virtual functions, dynamic downcasting in polymorphic class hierarchies...

Ngày tải lên: 06/07/2014, 17:21