ado net books

transactions in SQL Server can merge multiple database additions and deletions into a single unit of work, and can roll back any changes that have been made to any part of the operation during an error. Ado. NET also provides transactional functionality, through the ADO transaction, you can bind multiple tasks together, if all the tasks are successful, commit the

advantages and limitations of ADO are as follows.Advantage:L Simple.L and database transactions are almost fast.L transactions can be accessed across multiple databases.L Separate from the database, the proprietary code of different databases is hidden.Restriction: Transaction execution is on the database connection layer, so a connection needs to be maintained manually during the execution of the transaction. Note All commands m

Http://www.codeproject.com/vb/net/SimulatingRecordsets.asp Introduction As any. Net developer knows, the ADO. net approach to data access is substantially different from the ADODB predecessor. First of all, because it isDisconnectedAnd mostly based onDataSetConcept (that involves a client-side data caching), while ADO

note, the same ). There are two methods to implement ing: (1) register the alias of the class in the ActionScript class. Use remoteclass (alias = ". Net fully qualified class name "); (2) Add the classmappings node to the Web. config file. In some cases, the first method fails. You can try the second method. Obviously, it is most convenient to use a value object to transmit data to. net. Of cours

ADO. NET Entity Framework is the official ORM solution of Microsoft. Therefore, we can't help but remember the famous ORM solution in. NET Program Design-nhib.pdf from the open source. With the impressive appearance of VS2010, how will the new ADO. NET Entity Framework be pr

Ado. NET composition: Terminal Data set: include: Dataset/datatable/datarow .... NET Framework data providers: including Connection/dataadapter/datareader/commandAdo. NET creates a connection to SQL Server through the SqlConnection class, SqlConnection represents a database connection,

ADO. NET application ---- here, I will share my experiences with you. If you do not understand or have better insights, you can contact me to leave a message, we believe that our knowledge can be improved.First, let's take a simple look at ADO. NET is an object-oriented class library used to interact with data sources.

Visual Basic or VBA to process Excel Data~ And '(wavy lines and single quotes) instead of [], use ADO. NET test failed, report:FROM clause syntax error• When the worksheet name ([Sheet1 $]) is referenced, the data provider determines that the data table starts from a non-empty cell at the top left of the specified worksheet. For example, if the worksheet is empty from row 3rd, column C, row 3rd, column C,

Tags: ado LINQ to SQL SqlBulkCopy mass data insert performance testSummary: Use. NET-related technology to insert large amounts of data into a database is a common operation. This article compares the two Technologies of ADO and LINQ, using the SqlBulkCopy () andinsertallonsubmit () methods respectively. It is concluded that the insertion efficiency of the same i

Ado. NET Component You can use two components of ADO. Net to access and process data: . NET Framework data provisionProgram . NET Framework data provider The. NET Fr

ADO. NET Learning Series (II) and ado.net Learning Series This time, I used ADO. NET to insert a piece of data to the database. The primary uses the stored procedure. I don't want to use SQL text every time, so there is no progress ~~~ First, I will paste the database script that I will use in this exercise:1 USE maste

I recently saw ADO. NET data service in my learning process. It seems to be very useful and I will use it today; At present, his operating mechanism is not very clear. First, let's take an example to feel his benefits; In the later learning process, you may learn more deeply, and enjoy a better understanding of its internal mechanisms; First look at the creation process: 1. Create an ASP. NETProgram

Microsoft has developed a new term, connection mode and disconnection mode. The dataset mode in the memory seems to have been available for a long time, and the clientdataset of Delphi seems to be in this structure. I still haven't seen any innovations in. net. In addition, ADO itself has such a client-disconnected DataSet object recordset. "dataset can manage multiple datasets and Their Relationships." Thi

);// The first parameter indicates the name of the created constraint, the second parameter indicates the column to which the constraint is added, and the third parameter true indicates the primary key constraint and false indicates the uniqueness constraint. Implicitly create a foreign key constraint Datatable. Constraints. Add ("fk_customerid", tblcustomers. Columns ["mermerid"] , Tblorders. Columns ["mermerid"]);// The first parameter represents the constraint name, the second parameter repr

"); // = true; Of course, if you use different Context instance queries, the cache function will be effective. Well, let's take a look at ADO. NET Entity Framework beta 3:// PubsEntites is the System. Data. Objects. ObjectContext derived object of ADO. NET Entity Framework. PubsEntities context = new pubsEntities ();

ADO ADO. NET is improved by Microsoft ActiveX data Objects (ADO), which provides platform interoperability and shrinking data access capabilities. Because XML (extensible Markup Language, Extensible Markup Language) is a format for data transfer, any application that can read XML format can process the data. In fact, t

Ado. NET is the latest technology since the development of database access technology, which was marked by the use of Open DB Connectivity (ODBC) application technology a few years ago. So, something interesting happened. COM technology began to involve the database realm, and it reached a peak with OLE DB. Later, ActiveX data Objects (ADO), a rough, OLE DB versi

time the same application domain can have multiple different types of connection pools. In detail, it is identified by the process, application domain, connection string, and the Windows identity (when using integrated security) to form a signature to identify the distinction. However, for the same application domain, it is generally only by the connection string to identify the distinction, that is, the connection string is different, cannot use the same connection pool, a program may have mor

zones (cache ),The data queried from the database can be retained.Or even display the entire database. Dataset can not only store multiple tables, but also obtain data table structures such as primary keys through the datasetcommand object and record the association between data tables. Dataset objects can be considered heavyweight objects in ADO. net,This object is structured on the datasetcommand object

As we all know, the biggest advantage of ADO. net over ADO is that the data update and modification can be performed when it is completely disconnected from the data source, and then the data update is passed back to the data source. This greatly reduces the occupation of Database Server resources due to excessive connections. The following is an example in my bo