visual basic net 2010 a home and learn book

... 8.4 Make a Generic Search Form in a Visual Basic .NET Desktop Application Another useful utility that takes advantage of being data driven is a standard search form that you can use for any ... a data adapter is passed a SQL String made up of the properties just mentioned, a data table is filled, and the data grid's DataSource property sets the data table When the user clicks Accept, ... Name btnZ Caption Z Button Name btnAll Caption All DataGrid Name dgSearch Button Name btnAccept Caption &Accept Button Name btnCancel Caption &Cancel 5. Create the custom

Ngày tải lên: 26/01/2014, 11:20

... Inheritance 102 Summary 103 6DATABASE ACCESS WITH VB .NET AND ADO .NET 105 Accessing a Database from a Windows Application 106 Using the DataAdapter Configuration Wizard 107 ADO .NET 122 About ADO .NET ... application using Visual Basic 3.0. The application was a data-entry form with a data control, some text boxes, and an OK button? ?a simple application that read and wrote data to a Microsoft Access ... runtime-compatible languages share the same types, and you can see that cross-language compatibility is enhanced The metadata that is stored in the components... grandparents: William and Kathryn Utley and Aubrey

Ngày tải lên: 24/03/2014, 04:20

... object-oriented fashion, the author presents arrays and ArrayLists, linked lists, hash tables, dictionaries, trees, graphs, and sorting and searching as well as more advanced algorithms, such as probabilistic ... demonstrating the features of the Array class. The Array class encapsulates many of the functions associated with arrays (UBound, LBound, and so on) into a single package. Arraylists are special types ... CB820-McMillan-v1 April 21, 2005 16:14 DATA STRUCTURES AND ALGORITHMS USING VISUAL BASIC .NET This is the first Visual Basic. NET (VB .NET) book to provide a comprehensive discussion of the major data structures

Ngày tải lên: 12/08/2014, 16:21

... An array is declared with just the upper bound of the array as the argument and the implied base for the array is always zero However, one can work around this situation by creating an array ... structures and the ArrayList must be imported from the NET Framework library There are also some assumed inefficiencies with the ArrayList, primarily the facts that ArrayLists store all data as Objects ... a ReDim Preserve command with a standard array As we discussed in Chapter 1, an ArrayList stores objects using the Object type If you need a strongly typed array, you should use a standard

Ngày tải lên: 12/08/2014, 16:21

... speed and the Insertion sort is about half as fast. [...]... Stacks and Queues Data organize naturally as lists We have already used the Array and ArrayList classes for handling data organized ... compare the times C HAPTER 4 Basic Searching Algorithms Searching for data is a fundamental computer programming task and one that... abstractions are stacks and queues Data in a stack ... short-circuiting operators are AndAlso and OrElse. For example, if the first part of an And expression is False and the AndAlso operator is used, the system will evaluate the whole expression as False without

Ngày tải lên: 12/08/2014, 16:21

... it’s hard to tell with such a small data set SEARCHING FOR DATA IN A HASH TABLE To search for data in a hash table, we need to compute the hash value of the key and then access that element ... the Keys and the Values Separately from a Hash Table The Hashtable class has two very useful methods for retrieving the keys and values separately from a hash table: Keys and Values These ... CB820-McMillan-v1 April 21, 2005 17:41 CHAPTER 9 Building Dictionaries: The DictionaryBase Class and the SortedList Class A dictionary is a data structure that stores data as a key–value pair. The

Ngày tải lên: 12/08/2014, 16:21

... fundamental structures, such as arrays and linked lists, because you can search a binary tree quickly (as opposed to a linked list) and you can quickly insert data and delete data from a binary ... and, if you’re interested in Java implementations (and you should be because you can almost directly con- vert a Java implementation to one in VB .NET) , consult Data Structures and Algorithm Analysis ... class CSet since Set is a reserved word in VB .NET Class Data Members and Constructor... traversal methods later in this chapter Finding a Node and Minimum and Maximum Values in a Binary

Ngày tải lên: 12/08/2014, 16:21

... showArray method. HEAPSORT ALGORITHM The HeapSort algorithm makes use of a data structure called a heap.Aheap is similar to a binary tree, but with some important differences. The Heap- Sort algorithm, ... (index> 0And heapArray(parent).data < _ bottom.data) heapArray(index) = heapArray(parent) index = parent parent = (parent - 1) / 2 End While heapArray(index) = bottom End Sub And here’s the code ... heapArray(leftChild). _ data < heapArray(rightChild).data) Then largerChild = rightChild Else largerChild = leftChild End If If (top.data >= heapArray(largerChild).data) Then Exit While End If heapArray(index)

Ngày tải lên: 12/08/2014, 16:21

... Algorithms 373 an optimal greedy solution using discrete items is that we can’t put “half a television” into a knapsack. Let’s look at an example. You are a carpet thief and you have a knapsack that will ... determining... Massachusetts: Addison Wesley, 1998 LaFore, Robert Data Structures and Algorithms in Java Corte Madera, California: Waite Group Press, 1998 McMillan, Michael Object-Oriented Programming ... class 32 custom-built data structure or algorithm 97 cycle 321 D \d character class 190 \D character class 190 data adding to a collection 23–25 compressing 365–372 searching in a hash table

Ngày tải lên: 12/08/2014, 16:21

... detail 13 .2.6 DNS packets in. .. packets in detail 13 .3 Layer 2 network tapping 13 .3 .1 Using rvPacket and WinPCap 13 .3.2 Using PacketX and WinPCap 13 .4 Physical network tapping ... twenty-three years xix This page intentionally left blank 1 Understanding the Internet and Network Programming 1. 1 Introduction This book will help you develop network applications with NET, ... xi 10 Programming for Scalability 10 .1 10.2 10 .3 10 .4 10 .5 10 .6 Introduction Case study: The Google search engine Replication and redundancy Scalable network applications Future

Ngày tải lên: 12/08/2014, 21:20

... database to a stream Most business applications use databases to store their data. In order to transport data from the database across a network, it must be written to a stream. The easiest way ... the data, there are three ways to make the OleDbCommand act upon the SQL: (1) data binding and serialization pass the object to the constructor of an OleDbDataAdapter; (2) manipulation statements ... shallow serialization cannot resolve circular references within objects. For instance, if a BookCatalog class has a member of type Book, and the Book 2.2 Streams 43 Chapter 2 class has a member

Ngày tải lên: 12/08/2014, 21:20

... verbs; StreamReader quickRead; NetworkStream networkStream = new NetworkStream(handlerSocket); quickRead = new StreamReader(networkStream); streamData = quickRead.ReadLine(); verbs = streamData.Split("... ... httPresponse variable. A response from a Web server is asynchronous by nature, so it is natural to create a stream from this returning data and read it in as it becomes avail- able. To do this, we can ... language handles posted data in much the same way, so the technique is applicable to interfacing with any Web form. Web scripting languages share a common feature: some sections of the page are

Ngày tải lên: 12/08/2014, 21:20

... Security is paramount in financial transactions and many other types of information exchange with an associated dollar value. It is vitall that privi- leged information remain in the hands of its ... 9.4.2 Using SHA Create a new Windows application in Visual Studio NET as usual, and draw two textboxes on the form named tbPlaintext and tbHashed A button named btnHash is also needed Click ... then passes this byte array to the ComputeHash method of the SHA1Managed class The hash code is generated by an instance of this SHA1Mananged class By substituting SHA1Managed with SHA512Managed

Ngày tải lên: 12/08/2014, 21:20

... situation. Imagine an application that retrieves data from a Web site and stores it in a database. Users can use this application to query from either the database or the Web site. These three tasks ... database.  Draw down the data, and write it to the database.  Relinquish the restriction on the database and Web site. The second thread would be:  Wait for access to the database. ... hardware or software. A hardware solution can be achieved with a little imagination and a router. Most routers are configurable via a Web interface or serial connection. Therefore, a computer can

Ngày tải lên: 12/08/2014, 21:20

... Dim dwMaxRate As Integer Dim dwMediaModes As Integer Dim dwGenerateToneModes As Integer Dim dwGenerateToneMaxNumFreq... Dim MinDialParams As linedialparams Dim MaxDialParams As linedialparams Dim ... back is simply a function that is called asynchronously by an underlying process. When an incoming call is detected, the callback will contain a handle that can be passed to a function that accepts ... the call. At this point, call charges are applied to the line by the phone operator. Once the call is open, the modem behaves like a rudimentary audio device, which can play and receive basic audio.

Ngày tải lên: 12/08/2014, 21:20

... databases, MSMQ supports transactions. A transaction is an atomic unit of work that either succeeds or fails as a whole. In a banking system, a transaction might involve debiting a checking account ... the scenes and completely transparent to the application. If MSMQ fails for some reason, the applica- tion? ?and therefore the user—will not know that today’s data was never transferred. Acknowledgments ... described earlier in this chapter close at hand When sending a message that uses the... and UDP over bigger addresses) This had huge 160-bit addresses and was well-established within certain fields;

Ngày tải lên: 12/08/2014, 21:20

... this case, you used a different syntax for declaring and initializing a variable of the Book class. Visual Basic and Visual C# allow declaration and initialization in the same statement. Declaring ... that takes a parameter, which will make it behave, in some ways, like a function. You’ll create and initialize an array of class instances and then use that array as a data source in a data ... instance of any class that has the Object class as its base class. Because all classes you’ll use in Visual Basic or Visual C# have Object as a base class, you can add an instance of any class you...

Ngày tải lên: 10/12/2013, 14:16

... blocks, and converting managed to unmanaged types. Reference: .NET Framework Class Library, Marshal Class [Visual Basic] Incorrect Answers A, D: Bytes and streams can not be used for allocating ... TestKingProductsDataset.Copy C. Dim NewDataSet as New DataSet ( ) newDataSet.Tables.Add (“TestKingProductsDataset”) D. Dim newDataSet as New Dataset ( ) newDataSet.Tables.Add (TestKingProductsDataset.Tables ... don’t want exceptions. Line 2: TKDataAdapter.Update (CategoriesDataSet, “Categories”) We update the database. All updated rows in the Dataset are updated in the database as well. Line 3: If categoriesDataSet.Tables...

Ngày tải lên: 10/12/2013, 14:16

... 103 6D ATABASE A CCESS WITH VB .NET AND ADO .NET 105 Accessing a Database from a Windows Application 106 Using the DataAdapter Configuration Wizard 107 ADO .NET 122 About ADO .NET 122 DataSets 122 Working ... application using Visual Basic 3.0. The application was a data-entry form with a data control, some text boxes, and an OK button a simple application that read and wrote data to a Microsoft Access ... you have been creating in Visual Basic for the past six years, it is similar. Just as a standard COM DLL has a type library, the assembly has a manifest that contains the metadata for the assembly,...

Ngày tải lên: 10/12/2013, 16:15

... trong giao diện thiết kế và nhập chính xác đoạn mã sau: Dim LastName As String LastName = "Đức Lập" Label1.Text = LastName LastName = "LVP Office" Label2.Text = LastName Chú ... 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 / Chia \ ... Nhiều ký tự Ch a 0 đến 2 tỷ ký tự Dim St As String St=”Đức Lập” Boolean 16-bit Hai giá trị True hay False Dim Bl As Boolean Bl = True Date 64-bit Từ 1/1/1 đến 31/12/9999 Dim Da As Date Da=#16/07/1984 Object...

Ngày tải lên: 18/08/2012, 08:56