Using the .NET proxy class- the proxy class that's generated for us by either Visual Studio .NET or has properties and methods that allow us to control aspects of how the proxy calls the Web Service, including the length of the request timeout and access to t[r]
In this chapter you will learn: How do businesses make decisions? How do you make a good decision? Why do people make bad decisions? How do you find and retrieve data to analyze it? How can you quickly examine data and view subtotals without writing hundreds of queries? How does a decision support s[r]
When using the typed methods to obtain column values, you should be aware of what happens in the case of null values. When dealing with value types, null values are not permitted. Calling GetGuid() when there is a null result in the data row, for example, causes an exc[r]
ptg 4 The tricky part in Listing 4.10 is the code for highlighting the current entries in the calen- dar. In the Page_PreRender event handler, a list of all the current entries is retrieved from the database. The list is represented by a DataView object.
ADO.NET Namespaces ADO.NET is implemented as a set of classes that exist within the .NET Framework. These ADO.NET classes are grouped together beneath the .NET Framework’s System.Data namespace. Several important namespaces make up the ADO.NET d[r]
In addition to database management systems, in order to effectively apply and imple- ment databases in real industrial or commercial systems, a good graphic user interface (GUI) is needed to enable users to access and manipulate their records[r]
Database models are stored within an Application Developer project. This can be any type of project; for example, a simple project, a Web project with database access, or an EJB project with entity beans. The Data Definition view is a hierarchical view of the database
When a user retrieves a page from an ASP.NET web site, code runs on the server to generate and deliver the page. By default, IIS (Internet Information Server) uses the system account to provide the security context for all processes. This account can access the[r]
A number of features make this book unique among introductory SQL books: ■ You will not be required to download software or sit with a computer as you read the text. Our intent is to provide examples of SQL usage that can be understood simply by reading the book. The text include[r]
25 TRANG 10 viii DANH MỤC TỪ VIẾT TẮT Từ viết tắt Tiếng Anh Tiếng Việt ASP.NET CLR CSDL DBMS DLL ĐBSCL HTML NT ODM SEQUEL SQL URL XML Active Server Pages Common Language Runtime Database[r]
Once we've written code to read or write data from a backing store (such as the file system) using the StreamReader or StreamWriter classes we can easily read and write character data from other backing stores (such as memory buffers or network connections) using[r]
To jump-start your understanding of the FileSystemObject and how to use it, let’s begin with an example. In this example, a VBScript is created that uses the FileSystemObject to retrieve and display the properties associated with a file named Sample.txt .[r]
For example, a company might use XML to produce reports so different parties who receive the reports can handle the data in a way that best suits their needs. One party might put the XML data through a program to translate the XML to HTM[r]
Face recognition techniques have started to be used as com- mercial products in the last few years, especially on the frontal images, but with certain constraints such as indoor environment, controlled illumination, and small degree of facial expression as can be seen in many li[r]
TRANG 6 GIỚI THIỆU VỀ ADO.NET ADO.NET ARCHITECTURE Database XML Presen tation Tier Data Tier TRANG 7 CONNECTION CONNECTION A D O A D O .N E T COMMAND COMMAND RECORDSET RECORDSET XXXCONNE[r]
< Day Day Up > XML Basics Although the name Extensible Markup Language (XML) sounds a bit cryptic, don't worry: the format itself is actually quite easy to understand. In a nutshell, XML provides a way of formatting and structuring information so that[r]
■ ■ The DataReader object provides fast, read-only access to the results of a query for those times when you just need to get your data quickly. ADO.NET also includes features that let you save an entire DataSet as an XML file and load it back in lat[r]
Here, unrelated applications must share information. We need efficiency in data transference as well as high performance in handling simultaneous requests. Besides, we want to carry information from several applications into one in a comprehensible format.[r]
Next you create an instance of the TcpListener class. This is the class that actually does the work of listening to the incoming connections. You normally initialize this with the IP address and the port number on which the server will listen. When you start the listener, you tell it to
Databases have become a necessity for almost any application. The ability to store and quickly retrieve information is a hallmark of the personal computer revolution. Everything from store inventories to bowling league scores is kept in databases, often on personal computers. For most Windows users,[r]