States United States to transfer?

Huang Guangyu traces are still everywhere. Many stores in the States United States, a country the United States white LOGO replaced the original bright red and blue shop direct head, "I've heard the yellow boss personally designed." State employee said the United States.






Many stores in the States United States, White LOGO States United States replaced the original bright red and blue direct OTC

Beauty parlor in the country, "operators no domain, symbiotic," the inscription has remained the most popular decoration, this is Huang Guangyu surf business rules 20 years concisely. However, people still eager to look for signs of change. Because, in the January 16, Huang Guangyu times stopped short, a full 38 days until yesterday. Now, Huang Guangyu Huang Xiuhong sister took over her brother's Eagle Investment. Parties are quietly observe the business empire of the turn, but then had to Gome Huang Xiuhong the huge expansion of territory for many years to find a path to continue to develop survival.

Huang Xiuhong Shanghai warmth curtain call

"I will always remember this day"

"Today, I will leave here, I will always remember this day, if we go to Beijing, Xu Xujiu want calling me." Two days later, a Shanghai journalist also Huang Xiuhong say this, the warmth shown by memory still fresh. February 18, Shanghai, China held the U.S. system, called the "capital growth, domestic demand pull" reception, well-dressed over the Huang Xiuhong, wearing a blue-gray suit jacket came from Beijing to rush, coat shiny Yinzhu piece extends from the neck collar to the hem.

Different from previous networking company, in the still warm Gongchoujiaocuo, the reception as more like a farewell dinner Huang Xiuhong, somewhat sad. At this point, a senior official close to Wong Kwong Yu, born vice president of Gome, Haier Group, has moved from Beijing Xin Kexia lightning slim, replacing Huang Xiuhong Shanghai region became the new "Master." As the sister Huang Guangyu, Huang Xiuhong's new role of chairman of Eagle Investment, while access to decision-making committee Gome. She took over the Huang family business empire and an uncertain future.

Huang Xiuhong smaller than the 4-year-old Huang Guangyu, ranked third at home, and, like his brother, also Catholic, is different, Huang Guangyu always restrained restrained in public, Huang Xiuhong is more lively, too big drinker.

As Huang Guangyu was never considered in the management of family members engaged in nepotism, and little sister HUANG Yanhong Huang Xiuhong, as in the country's development in the history of the United States have left the illustrious military exploits. Huang Xiuhong in 1991 went to the States United States States West Coast has been a four-store manager, general manager of Gome Beijing branch, deputy director of operations centers. In the meantime, she had left the country the United States, has done business for some time in the water, but this "just for fun" like business experience over soon. In 2003, the United States has established a national system of early financial and personnel HUANG Yanhong immigrants in Singapore. States in 2006 after the U.S. acquisition of Yongle, Huang Xiuhong and Shanghai as General Manager of Gome, the country continues to play a central role in the United States.

People who come into contact with Huang Xiuhong said, when she brought my brother always like Huang Guangyu said "our boss", his adulation and loneliness. In the 18th night, the topic is still being consciously or unconsciously avoid the, Huang Xiuhong not for GOME, and even the future strategy of Eagle Investment comment.

On the same day, the National United States "Western Appliance 2009 Summit" held in Chengdu. At the meeting, vice president of Gome Group, Mou your first home appliance business with close to a hundred veterans in the country, More than 300 veterans met the regional household appliances, preaching the country the United States in 2009 of the New Deal.

Giant full "holding stability"

Slow expansion of the full "holding stability"

Time back to 4 weeks ago. At 19 o'clock on the January 18 and more, vice president of Gome, Yang Qing, spokesman of abnormal peak, interview requests from around the country flocked to his cell phone calls, so competition is fierce, in half an hour, reporters can only hear the phone could not connect the busy tone. Previously, Gome has just issued a public notice in the Stock Exchange, Gome Huang Guangyu resigned all his posts.

Yun Peng Huang Guangyu's no 18th floor building is still the power center of Gome. However, the next day, more attention was the supplier of the other country the United States also released important information attracted to "optimize the network to enhance the relationship with suppliers will be the States United States an important direction for future development", no one felt this monster wary of "low profile."

"Huang Guangyu Zhang appreciate the words 'business is only business, not in setting'. In the past 20 years, this was interpreted as a high-speed expansion. On the increasingly powerful voice of manufacturers, themselves become the rules of the game-makers, For large channel for such a giant economy, especially. "one industry, told reporters, however, in the past month, in the various countries issued within the spirit of the United States, the" one shop to enhance efficiency "requirements far much pressure off the "Open a number of" indicators, which has even been removed from many branches of evaluation system.

When most of the States United States staff is also preparing a New Year party when the countries outside the United States has issued a development strategy in 2009. The core of this strategy is to focus on optimizing the network, optimize store, to raise the quality of single-store operations, and moderate change out part of the store. One purpose, to suppliers and the National US-input-output ratio can be maximized. "We believe that Gome has now completed the network layout, with 1,300 stores, basically completed when the network layout, the shop will no longer rely on Zuowei growth, but into the optimization stage." Gome vice president, spokesman explained how the establishment of Yang Qing new strategy in mind.

There is no way out of the mode of transformation

Issued a 21 day "punishment" Bulletin

"Even under the 21 day sales communications. Bulletin of the penalties are not done." Salesman, a country the United States complained to reporters. Recently, the country demanding the U.S. desire for performance and high penalties caused discontent among some staff, many countries feel the United States and sales pressure.

However, the transition is still advancing. February 19, Gome Group stores that started in the country in transition, first select a country in transition stores benefit the U.S. system the best stores - large and medium sized electrical shop in tower. "Because of model transformation is the next great determination, we must succeed." He Yang Qing said.

According to Gome stores in transition recycling center design, modified, and Tajikistan will increase the number of store display products 300%. At the same time, the tower will become the country store the first U.S. group to achieve a separate store marketing, store, which means that the manager's authority was greatly increased. Rapid changes in the competitive situation, such a mechanism can be made more flexible offensive and defensive tactics. "In the tower shop store layout transformation is not a simple transformation, but Gome Group stores the depth of the reform model." GOME Group Executive Vice President Wang Junzhou repeatedly emphasized.

However, He also said Yang Qing, optimize network and store modified not "Huang Guangyu event" results. "The study began two years ago, the United States, Japan, Europe, we have investigated before. Also invited third-party research team. We believe that the U.S. model is the future of the country in a city where there are four or five iconic store These huge stores sales. transformed morphology of stores closer to home appliances stores in Japan. "

Ho Yang, a young industry observers agree that the statement, "In 2006, the most crucial measure of retail chain index plunged 28%, to U.S. management of the country a great boost. Since then, Gome started to adjust its business expansion strategy." he believes that this is a home appliance chain industry through high-speed growth, "adolescent" the common challenges faced.

Supplier at least not panic

"Who would not make life difficult with the business"

"No matter how business commitments, or to ground, can be used only action test." Color TV business, a responsible official told reporters. He just finished state summit of beauty, and, like many colleagues, when asked the United States now exchanges and national, he or words with care. However, with more than two months before the panic to find out the news compared Huang Guangyu, who feel that "now not to worry." "States United States did make some adjustments, but as long as risk control, we can continue to work together, who will not be hard on with business. "

More importantly, in the past few weeks, a message popular among manufacturers in the appliance. "I've heard of paper under the national to the bank so that banks should not embarrassed the country the United States." Suppliers, this shows that stability in the country to secure the position of Gome, the country which the United States may be able to survive the initial "funding crisis," an important factor.

States United States on the manufacturers of payment except cash payment, the general use of accounts of and accept a draft. Account of the period usually 1 month, acceptances for the 3 months. In other words, the country received U.S. factory goods in to pay to the other acceptances, manufacturers, after 3 months to cash in the bank, if paid in advance, to deliver the interest banks. U.S. banks as collateral for the country.

"Huang Guangyu incident", the GOME operational risks increase, the report said, "Gome small commercial banks on the commercial credit immediately suspicious, do not want or care to their lending." In the third quarter of 2008, banks are required The security deposits equal to the amount of bank acceptance bills 53%, this ratio is said Huang Guangyu, after the survey, up to 60% and over, at least over the United States took out 700 million yuan. In the worst case, if the retailer over outstanding loans manufacturers, retailers, manufacturers will be turning off the goods, unless the retailer payment. This will affect retail sales, due to inability to pay bank acceptance. Banks will control the retailer's credit, cash flow increased tension, a vicious circle.

"States United States really have the cash flow is very tight." Middle-level people within a country the United States recalled to reporters, but he thought the most difficult period is over. Xoceco insiders told reporters that he is aware of the country the United States, "Posture." The most direct representation is that the U.S. has accelerated the country's return to the supplier section, payment will shorten the cycle. A foreign white giant Chinese leader also told reporters that the cooperation with Gome is still normal, with no break for the situation, "GOME big for us is to force suppliers insured."

States United States almost certain refinancing

Shadow of the investors are cautious

The United States in the development process of the country, the country firmly in the hands Huang family has control of the United States. Huang Xiuhong sits Eagle, the situation seems to indicate the nature of the changes will not occur. But in order to ease the financial pressure, analysts say, countries the United States could become a "brave" in the park.

Domestic appliance manufacturers may hold joint news of GOME stake soon after the denial by the industry. Observers Luo Qingqi appliances that retailers should be a public platform, manufacturing, retail enterprises a lot of cross-holding contradictory.

However, the possibility of refinancing the country but the U.S. has been confirmed. States United States States of potential U.S. investors have with the new management held preliminary talks. These potential investors, existing shareholders of both countries the U.S. Morgan Stanley, Warburg Pincus, including Magnolia investment management companies, and Bain Capital. Magnolia investment is "the first generation of local Chinese investment bankers," Fang's in charge of a size of 2.5 billion dollars of investment institutions. Regardless of what kind of financing options, may mean that the country level, the U.S. capital appears to reshuffle the cards.

Of course, investors are cautious. After the Spring Festival, the National Board of the United States by force reorganization will triple trading company's US-related businesses into the state system. However, the case is still pending Huang Guangyu, who recently was involved in vortex triple trading company involved in bidding for Hopson Development Chairman Chu Mang. Last Friday, as rumors Chu Mang Yee has been involved in "Huang Guangyu case" among the company's stock tumbled 50%. Huang Guangyu event out of the shadow of a commercial carrier also needs more time, but also need some luck.

Huang Guangyu Capital Events

In 1985, Huang Guangyu, Huang Junqin carries 4,000 yuan went to Inner Mongolia career in business.

In 1986, Huang brothers in Beijing, Zhuhai City, I started contracting States to the U.S. clothing store business.

In 1987, the country was renamed the U.S. clothing store, Gome stores, as Gome originator.

In 1993, the separation of the two brothers, Huang Junqin founded the New Henderson Group is engaged in real estate, to continue operating Gome Huang Guangyu. Is, the countries the United States began to open several additional stores in Beijing.

In 1999, the National American National expansion. In the same year, Huang Guangyu was established to invest in capital operation Eagle. Eagle Investment Company is a subsidiary Gome, Eagle Real Estate, Peng Thai investment.

June 2004, Gome Huang Guangyu to 94 stores with 88 million sold to Hong Kong listed company Eagle Group, Gome, by Hong Kong-listed China Eagle.

September, 0493 Hong Kong stocks shares referred to by the "China Eagle" official changed to "Gome", its main business resulting shift retail. Huang Guangyu retail and real estate empire to become the two pillars.

April 2006 to July, Huang Guangyu acquired 29.58% stake in Zhongguancun has become the largest shareholder. In the same year, Huang brothers on suspicion of illegal loans to be investigated.

July 2006, Gome to add cash to acquire convertible Paradise.

December 2007, the country hosted the United States to 3.65 billion yuan a comprehensive medium and large appliances.

In 2008, the U.S. Department of State cash triple trading company, to become the largest shareholder.

November 2008, Huang Guangyu arrested by police investigating economic crimes, the country under investigation with the U.S. Chief Financial Officer Zhou Yafei. Subsequently, his brother Huang Junqin, Zhongguancun chairman Xu Zhongmin also alleged economic crimes investigation was taken away by Beijing police.







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About How To Recover Photos From Formatted And

SSL works

SSL is a security protocol that provides to use TCP / IP communications between the application of privacy and integrity. Internet Hypertext Transfer Protocol (HTTP) to use SSL to achieve secure communications.

Between the client and server data transmitted through the use of symmetric algorithms (such as DES or RC4) for encryption. Public key algorithm (usually RSA) is used to obtain the encryption key exchange and digital signatures, this algorithm uses the server's SSL digital certificate public key. With the server's SSL digital certificate, the client can verify the identity of the server. SSL protocol version 1 and 2 provide only server authentication. Version 3 adds client authentication, this certification also requires the client and the server's digital certificate.

SSL handshake /

SSL connections are always initiated by the client. SSL session at the beginning of the implementation of SSL handshake. This handshake produces the session password parameters. SSL handshake on how to deal with a simple outline, as shown below. This example assumes that in Web browsers and Web servers to establish a SSL connection.






(1) client to send out capacity of the client password client "Hello" message (to client preference order), such as the SSL version of the password on the client support and client support for data compression. Message also contains 28 bytes of random numbers.

(2) server to server "Hello" message response, this message contains password methods (password pair) and selected by the server, data compression, and the session ID and another random number.

Note: client and server must support at least one public password pair, or handshake failure. Server generally choose the largest public password pair.

(3) The server sends its SSL digital certificate. (Server with SSL, X.509 V3 digital certificates.)

If the server uses SSL V3, and the server application (such as Web server) needs a digital certificate for client authentication, the client will issue a "digital certificate request" message. In the "digital certificate request" message, the server to issue digital certificates to support the client list of the types and acceptable CA names.

(4) server to issue server "Hello to complete" message and wait for client response.

(5) a receiving server "Hello to complete" message, the client (Web browser) to verify the server's SSL digital certificate and check the validity of the server's "Hello" message parameters is acceptable.

If the server requested client digital certificate, the client will send its digital certificate; or, if no suitable digital certificate is available, the client will send a "no digital certificate" warning. This warning is just a warning, but if the client digital certificate authentication is mandatory, then the session server application will fail.

(6) The client sends a "client key exchange" message.

This message contains the pre-master secret (a symmetric encryption key used in the generation of 46-byte random number), and message authentication code (MAC) key (with the server's public key encryption).

If the client sends a client-side digital certificate to the server, the client will issue a signed client's private key "digital certificate authentication" message. By verifying the signature of this message, the server can display digital certificates verify the ownership of the client.

Note: If the server does not belong to a digital certificate private key, it will not decrypt the pre-master password, can not create the correct key is a symmetric encryption algorithm, and the handshake will fail.

(7) client using a series of encryption algorithms will be pre-master secret into a master secret, which will send all birth for encryption and message authentication key. Then, the client issued a "change password specification" message will be converted to the new consultation server password pair. The next client to issue a message ("not complete" message) to use this password key encryption method and the first message.

(8) server to its own "Change Password norms" and "completed" message response.

(9) SSL handshake over, and the application can send encrypted data.







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SYBASE Services

Services

This article describes the database transaction isolation level on the impact of the lock, by comparing the transaction isolation level 0 and 1, to understand the relationship between the lock and dirty time.

Experiment: set 0 and 1 respectively, isolation level, the implementation of two different but related issues there. The experimental environment is as follows:

1, the right to access the user database (in this case aca_database) and modify database tables and queries have permissions.

2, the database contains tables auths, including salary column (data type is money), there is a certain amount of data (in 1 million lines).

Steps:

1, as in the same machine, can be performed separately two "SQL Advantage", respectively legitimate account login, prepare their own implementation of a transaction.

2 Open the user interface in their database aca_database, set the isolation level to 1 (also goes for the default value):

set transaction isolation level 1, see the current isolation level using select @ @ isolation

3, the implementation of the first two sentences of the first transaction, suspending and later committed or rolled back.

begin transaction

update auths set salary = salary +100

commit transaction

(Rollback transaction)

4, the implementation of the second transaction select sum (salary) from auths

5, the end of the normal execution of a transaction, but only changes in the memory buffer to complete the transaction and did not really end, do not release the corresponding lock, the second transaction in the wait state. Executable sp_lock and sp_who command.

6, step 3 in order to submit or rollback, the second transaction to be implemented.

7, to change the transaction isolation level is 0, repeat steps 3-4. No change in the first transaction, the second transaction will soon come under the first transaction is made to modify the data results, it seems that the implementation of the response on the first transaction is not subject to influence.

8 Repeat step 6 the end.

Through the above experiments we know that:

1, transaction isolation level 0 allows dirty read transaction isolation level 1, does not allow dirty read, but rather wait for real before the end of a modified transaction and release the lock.

2, isolation level 0, if the modification is to rollback the last transaction, then the query time transaction will not read the correct data.

3, satisfied that there is no rollback transaction possible, and called for greater efficiency and parallel implementation, only then we may consider setting isolation level to 0.






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"Milky Way people face to face" a series of interviews (3)

Interview Date: November 29, 2007

Respondents were: deputy general manager Tian Xiao-Feng Wu

Interviewer: Guan Shu-Hua Tian Marketing Department

Guan Shu-hua: Tianhe company you are a veteran, you talk about the company on the Milky Way over the past 10 years it feels.

Wu total: really is the 'elder statesman', but the company's leadership, the majority of experts are also 'veterans', the core, the backbone of the work of years in the Milky Way in 6,7 years, many are 10 years of my 'seniority' is more than 10 years, but they face an upsurge in manufacturing information coming, we, 'veteran' still full of energy, vitality, especially reflected in the thinking, strategy, direction and methods.



Tianhe Software as the main founder and witnesses of Tianhe Software's full, my biggest feeling is pride, joy! The following reasons:

Tianhe software company engaged in manufacturing information more than ten years, the Chinese manufacturing informatization full participants and contributors; over the past decade is made great achievements, the country nearly half of the mechanical designers to use CAD software, Tianhe, a few 100 large-scale equipment manufacturing enterprises of the Milky Way CAPP design process management system software, such as manufacturing, assembly, "Chang'e One" in the aerospace industry, most of the factories, the Tian CAPP software in use. In other words, "Chang'e One" most of the parts processing, assembly and description are developed in the Milky Way completed the preparation of software.



Lunar probe into space, Tianhe proud!

Milky Way man made a significant contribution to the prosperity of the country! Tianhe software users throughout the aerospace defense, power, energy, metallurgy heavy machinery, rolling stock, construction machinery and other industries, the Three Gorges power station, high-speed trains, power plants, etc. are all masterpieces of Tianhe Software Users . More description, see "help the country's prosperity, Tianhe Software national revival."

10 years, the Tianhe Software has developed into a CAD / CAPP / PDM / MES solution for four series of products that can provide users with total information solutions consulting, integration, implementation and services.

The above-mentioned achievements are the people I work together all the results of Tianhe, so proud!

More than ten years, the work process, get to know many of the Milky Way, clients and industry friends, colleagues, and many have become close friends, with only about work, but also talk about life, friendship, love, etc., we were just as hard Tianhe Like bees, the flowers in the customer shuttle, while imparting the pollen nectar, honored, he felt a physical pleasure!

Guan Shu-hua: Resource Development Division is for the whole company services, how to handle relations and other departments to coordinate and efficient work?

Wu total: Last year in September, I began to expand in corporate resources, including capital, operation, cooperation and alliance marketing, etc., that is what I always wanted to do, and also the next stage of value for the company's largest and fastest , because Tianhe software company in the past ten years or the accumulation of sediment too much wealth, need to dig.

These more in line with my character, role, I am a message, coordinator, innovator.

I think a good relationship, and efficient work on the premise that:

Good attitude, honest

Thinking, thinking, and methods to determine the direction of

Positive communication, effective communication

Do the things they can do, and constantly improve themselves, the pursuit of excellence

Guan Shu-hua: Milky Way's marketing, and other peers, are considered to be very low key, how is your view?

Wu total: Definitely. This pursuit of Tianhe Software and culture relations.

Tianhe Software's goal is to continue to do light manufacturing information in the field of "stars" rather than dazzling, "Meteor."

Tianhe Software's leadership, the experts a very serious, stable, low-key, all devoted to our product planning, implementation services, and life into our products to customers beginning in the planning considerations are the long, very detailed, like a car The German Department of the brand.

Distance tests a horse, time will tell, we Tianhe Software indisputable moment of high and low, 5, 10 and 50 years naturally see the outcome, there will be a correct assessment of clients in mind.

Tianhe Software brand is the Milky Way in the past 10 years, set up in heart, Tianhe people to pursue the customer satisfaction and loyalty.

Guan Shu-hua: Milky Way company how to deal with self-focused products and cooperation with foreign countries Copyright relationship?

Wu total: Tianhe software company after more than ten years of development, laying a solid foundation, embodied in the product line, customer base, needs to grasp, experience and team consulting to implement and so on, like the foundations of the buildings had to lay, the next task is to quickly high level, that is to strengthen international cooperation, alliances, around the company's development strategy, target customer groups, needs, comprehensive information to meet customer's overall needs.

Guan Shu-hua: You have visited many important customers, the work on information technology also has a very in-depth understanding and insights, your manufacturing information how the future market prospects look?

Wu total: 10 years, actually traveled across the country provinces and cities of manufacturing enterprises, access to numerous experts, business leaders, including domestic and foreign manufacturing software counterparts. Therefore, work on information technology have their own views, at different times wrote some ideas, such as:

From a historical, philosophical perspective with 'Eleventh Five' Information Project - "2 off" strategy, PLM is the business revolution.

I have information on the manufacturing outlook is optimistic and positive.

Manufacturing information are endless things that we need only recall the history of Chinese manufacturing information can be learned. Tianhe Software will become the field of Manufacturing Information century-old.







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Fireworks produced hidden color photo

Before the burst of popularity these hidden color photo (in the IE browser, Ctrl + A Select All will become color), I believe many people will be produced using Photoshop, Fireworks click here to re-wordy way of production. Those who do can directly pass.

Source file:






1, open a color image, copy the layer out, make sure the two aligned.

2, create a 2x2 px canvas, pencil points, two points, as shown (below is amplified), and save.






3, back to deal with the picture, draw a complete map of the black rectangle covering the source, and set the rectangle with the canvas top left corner (0,0) of aligned, rectangular "texture" is set to just make the little picture, " total texture "to 100%.

4, select the rectangle and copy the source image, "Edit - mask - combination of mask."

5, after the image of the mask to add "hue saturation" effect, and set the "Hue" to -180 or 180 (anti-hue).

6, export higher quality format, complete.







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Progressive learning Power Builder 6.0 - Chapter What is PowerBuilder

Chapter What is PowerBuilder

PowerBuilder start learning, first to make clear what the problem is that PowerBuilder, it is used to doing, what its characteristics. PowerBuilder only know the functions and characteristics of the host, we can know when to use PowerBuilder as our application development tools.

1.1 What is PowerBuilder

We know that the database application is the current computer applications a very important aspect of database applications in the current technology is widely used in client / server architecture, in this architecture, all the data and database management systems on the server, the client through the use of standard SQL statements, etc. to access the server data in the database. Because of this architecture, the data and data management are unified on the server. To ensure data security and integrity, but also can take advantage of the characteristics of high-performance servers. Because client / server architecture of these advantages, and have been very widely used.

PowerBuilder is a popular database application development tool manufacturer PowerSoft launched products (PowerSoft database vendor Sybase has been acquired), it is entirely in accordance with client / server architecture, research design, client / server architecture, it used client machine, as the database application development tools exist. As the use of object-oriented PowerBuilder and visualization technology to provide visual application development environment, so we use the PowerBuilder, you can quickly and easily develop a server using the background data and database management systems database applications.

At present, the rapid development of network technology, with the attendant development, there are OLE, OCX, cross-platform technologies, and in the latest version of PowerBuilder 6.0 PowerBuilder provides full support for these technologies. In short in the areas of database development tool, PowerBuilder is one of the very good one, we can use it to develop powerful database applications.

1.2 PowerBuilder features

PowerBuilder provides the most popular relational database management system support, as in PowerBuilder applications to the database access part of the commonly used international standard database query language SQL, so applications developed with PowerBuilder can not do modify or changes can only do a small amount of background in the different database management systems use. Means that applications developed with PowerBuilder is independent of the server database management system.

And, like most WINDOWS applications, PowerBuilder is event-driven work. In this work in the program's operation is not a fixed process, procedures in the code is for a variety of possible incidents 缂栧啓 of when the program starts running Zhihou, it can accept from Xitong, the user Huozhe other Yingyong program Chufa events, and then implement the corresponding event code. Event-driven way of working with object-oriented technology are closely related, in the PowerBuilder application, acceptance of events is usually the program interface in a variety of visual objects.

PowerBuilder is an object-oriented development tools, all kinds of WINDOWS applications common window, menus, controls, etc. are all one by one in the PowerBuilder object. In PowerBuilder, we can also create their own user object. Of particular note is the PowerBuilder object-oriented approach provides the full support of various technologies, we can use the object oriented method of encapsulation, inheritance, polymorphism and other features make the applications developed with our great reusability and scalability, and this is the application of software engineering in the important goals made.

At present, due to the development of network technology, many different operating system platforms to be used in the INTERNET while online, which is the development of cross-platform applications put forward higher requirements, and PowerBuilder to provide a good cross-platform , such as PowerBuilder, the use of a variety of objects WINDOWS platform can be easily applied to the UNIX platform, because the PowerBuilder support cross-platform nature of the object. This allows the application from one platform to another platform to become not complicated.

In order to provide support in all aspects, PowerBuilder has its own programming language POWERSCRIPT, this language in addition to providing basic flow control statements, it also provides hundreds of functions to manipulate the various objects and services such as DDE, OLE and other support. In addition, we can also define your own functions to deal with specific events. Learn a considerable portion of the time when PowerBuilder is used to understand and become familiar with PowerBuilder provides a variety of functions.

PowerBuilder made a big feature of the concept of the data window object. PowerBuilder DataWindow object is an object of type, and other different groups, the data window object is designed to access back-end database services, in the data window object, we define the data source and data display style, so that application, we can focus exclusively on running the program flow control, rather than the specific source of the data concerned, because we in the data window object has defined the data source. If you need to use different data in the database as long as the window object to modify the data on it. Of particular note is the PowerBuilder object in the data window provides a wealth of data displayed to meet different needs.

In newer versions of PowerBuilder provides the basis for library PFC, application development it provides a number of predefined reusable classes and objects, use basic library PFC can quickly develop high quality applications and reused. Really play a great power of object-oriented programming.

Finally to be noted that there are three different versions of PowerBuilder were DESKTOP type, PROFESSIONAL type, and ENTERPRISE type, DESKTOP type is for personal use of desktop applications, where you can use the built-in database management system PowerBuilder SYBASE SQL ANYWHERE to create and use the local database for individual applications; PROFESSIONAL type the most important point is that PowerBuilder provides MICROSOFT ODBC (database of standard connection interface) support, in the PROFESSIONAL version of PowerBuilder we can use inheritance, polymorphism Most features such as; in the ENTERPRISE version of the most important thing is to provide for development of large database applications and comprehensive support for developing large applications provide many auxiliary tools, such as C + + CLASS BUILDER so.

1.3 PowerBuilder database connection

Database front-end development tools and database management system back-connection is a very important issue. PowerBuilder provides two ways to access back-end database, an ODBC standard interface by the way, the second is through a dedicated interface to the database connected with the background.

ODBC's Chinese name is an open database connection, it is Microsoft's proposed standard database connection using ODBC connected database, the first step is to create a data source, such as we can use the WINDOWS Control Panel under the "32 BIT ODBC" option to create a database-driven data sources, data source is created, we can use the local computer to access the data source defined in the database data in the background.

We can also special interface with a database back-connected, the specialized interface is the background for a particular database management system designed, so the speed of access to data in this way than with ODBC access to data means faster number, if Our application is only for specific types of back-end database, of course, using special interface to access background information faster.

On the basic concepts and features of PowerBuilder on the introduction to this, then we will truly enter into the wonderful world of PowerBuilder.






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