firebird ado net data provider example

An error has been detected while running a history project today, DbProviderFactories cannot find the requested. Net Framework data Provider. may not be installed "issue. _providername is "Oracle.DataAccess.Client" Solution: 1: Install ODAC client. 2: Modify the driver System.Data.OracleClient If you still have an error copying C:\Windows\Microsoft.NET\Framewor

), @ errseverityInt Select@ Errmsg = error_message (), @ errseverity = error_severity () Raiserror(@ Errmsg, @ errseverity, 1) EndCatch This example checks @ trancount to determine whether a transaction is in progress. (Variable @ trancount calculates the number of transactions in the current connection. The begin transaction statement adds 1, while the rollback and commit values minus 1 .) The raiserror statement

The following describes the direct source and Baidu encyclopedia. The introduction is comprehensive and detailed. as a side dish, we have no reason not to read these boring introductions: The name of ADO. NET originated from ADO (ActiveX Data Objects) and is a COM component library used to access

immediately discovered until the connection is consumed to access the database.Note:If the open () method is executed when data provider only need to remove an existing connection from the connection pool, then open () does not have access to the database, so the "dead connection" is not yet discovered.The following is an example to explain in detail the change

Data access is the basis of any application. In this article, I will explain how to use C # and ADO. NET to access SQL Server-based data and how to display data in a data-bound grid control. I use a simple C # application as an

When using ADO. NET to develop applications, various requirements for data operations are required. In some cases, you may just want to display data on the form. In other cases, you may need to design a way to share information with another company. Regardless of the operations on the

Label:The WIN7 system 64-bit presence Net Framework data provider requires Microsoft data Access components (MDAC). Please install Microsoft Data Access components (MDAC) 2.6 or later. How to solve, has already downloaded the 2.8 version installs, but still does not have the

bottlenecks: 1. Regular Expression2. JToken. Path attribute If you need to call these two operations frequently in your code, you need to consider performance issues. Especially JToken. path attribute. Its internal implementation involves the Linked List data structure, complex loops, and so on, so the efficiency is not very high, avoid using this attribute whenever possible (of course, I still have a call to this attribute in the open-source code, w

connection objects, for different data sources, ADO. NET provides different command objects. Specifically, it can be divided into the following command object. . NET Data provider corresponding Command object

Summary The release of Silverlight 2 beta 1 brings us a lot of surprises from runtime and tools, such as supporting the framework languages Visual Basic, Visual C #, ironruby, ironpython, A series of new features such as JSON, Web Service, WCF, and sockets support. The article "one-step learning Silverlight 2 series" takes you to Silverlight 2 development quickly from the following aspects: Silverlight 2 basic knowledge, data and communication, custom

Overview The release of Silverlight 2 Beta 1 brings us a lot of surprises from Runtime and Tools, such as supporting the framework languages Visual Basic, Visual C #, IronRuby, Ironpython, A series of new features such as JSON, Web Service, WCF, and Sockets support. The article "one-step learning Silverlight 2 series" takes you to Silverlight 2 development quickly from the following aspects: Silverlight 2 basic knowledge, data and communication, custo

Today in helping colleagues debug when encountered this problem, the error message to the data provider is the problem, first we look at the environment.Database version: Oracle 11.2.0.4.0 64-bitDatabase server: LinuxApplication Server: 32-bit WindowsIis:iis7. netframework:4.0Guess that there is no data Provider instal

server| Program | data A friend suggested that I control the connection pool connection, said to improve performance, but read the following article, the sense of the connection pool is maintained by the system itself, the program does not need to be controlled. Do you have any comments? Is there a way to raise performance on connection issues?SQL Server. NET Framework