connecting to a sql server database in asp net

... reason, ADO .NET automatically stores database connections in a pool. Connection pooling offers a great performance improvement because you don't have to wait for a brand new connection to the ... illustrates how to use a SqlConnection object to connect to a SQL Server database */ using System; using System.Data; using System.Data.SqlClient; class MySqlConnection { public static ... static void Main() { // formulate a string containing the details of the // database connection string connectionString = " ;server= localhost ;database= Northwind;uid=sa;pwd=sa";...

Ngày tải lên: 07/11/2013, 10:15

... StateChangeEventArgs class. The following example defines a method named StateChangeHandler to handle the StateChange event. You'll notice that the second parameter to this method is a StateChangeEventArgs ... closed. Connecting The Connection is establishing access to the database. Executing The Connection is running a command. Fetching The Connection is retrieving information from the database. Open ... the SqlInfoMessageEventArgs object. You can produce information and error messages using the SQL Server PRINT or RAISERROR statements, which are described in Chapter 4 , "Introduction to...

Ngày tải lên: 14/12/2013, 13:15

Ngày tải lên: 21/01/2014, 11:20

... from changing data being read by a user and preventing users from reading data being changed by a user. Locks are acquired and released by user actions; they are managed internally by database ... command. SqlCommand cmd = new SqlCommand(sqlText, conn, tran); // Create the DataAdapter and CommandBuilder. SqlDataAdapter da = new SqlDataAdapter(cmd); SqlCommandBuilder cb = new SqlCommandBuilder(da); ... dataGrid.DataSource = null; [ Team LiB ] Recipe 6.14 Specifying Locking Hints in a SQL Server Database Problem You need to pessimistically lock rows in an underlying SQL Server database. ...

Ngày tải lên: 17/10/2013, 20:15

... conn.BeginTransaction(IsolationLevel.ReadCommitted); // Create the command. SqlCommand cmd = new SqlCommand(sqlText, conn, tran); // Create the DataAdapter and CommandBuilder. SqlDataAdapter da = new SqlDataAdapter(cmd); ... on a resource. Locks ensure transactional integrity and database consistency by preventing other users from changing data being read by a user and preventing users from reading data being changed ... get information about database locks: ã The system stored procedure sp_lock returns a result set containing all active locks. ã The syslockinfo table in the master database contains information...

Ngày tải lên: 14/12/2013, 18:16

... thường đó là Default Instance. Một Instance c a SQL Server 2000 có 4 system databases và mt hay nhiu user database. Cỏc system databases bao gm: ã Master : Ch a tất cả những thông tin cấp hệ thống ... SQL Server hay khi ta disconnect. ã Model : Database này đóng vai trò như một bảng kẻm (template) cho các database khác. Ngh a là khi một user database được tạo ra thì SQL Server sẽ copy to n ... Kế Một Database Tạo Một User Database Chúng ta có thể tạo một database dễ dàng dùng SQL Server Enterprise bằng cách right-click lên trên " ;database& quot; và chọn "New Database& quot;...

Ngày tải lên: 25/08/2012, 09:00

... user database được tạo ra thì SQL Server sẽ copy to n bộ các system objects (tables, stored procedures ) từ Model database sang database mi va to. ã Msdb : Database này được SQL Server Agent ... (SQL) Server nào đó là ta nói đến một Instance c a SQL Server 2000, thông thường đó là Default Instance. Một Instance c a SQL Server 2000 có 4 system databases và một hay nhiều user database. ... Sp_help ['object'] Cung cấp thông tin về một database object (table, view ) hay một data type. Sp_helpdb [&apos ;database& apos;] Cung cấp thông tin về một database cụ thể nào đó. Sau đó...

Ngày tải lên: 06/10/2013, 17:20

... Team LiB ] [ Team LiB ] Recipe 1.4 Connecting to a Secured Access Database Problem You want to connect to a Microsoft Access database that has been secured with user-level security and ... defined by ADO .NET. To open a database secured by Microsoft Access user-level security, use the Jet OLEDB:System Database attribute in the connection string to specify the path and filename ... The sample code contains a single event handler: Connect Button.Click Creates and opens a connection to a Microsoft Access database secured with user- level security and a workgroup file using...

Ngày tải lên: 24/12/2013, 05:15

Ngày tải lên: 21/01/2014, 12:20

Ngày tải lên: 26/01/2014, 10:20

Ngày tải lên: 26/01/2014, 11:20

Ngày tải lên: 23/10/2014, 18:38

... of ASP. NET AJAX. Using ASP. NET AJAX server controls is the easiest and quickest path to implementing AJAX functionality in your ASP. NET application. They are also ideal for when a minimal amount ... learned how to create a new AJAX-enabled ASP. NET site. Alterna- tively, you can just as easily create an AJAX-enabled ASP. NET web application if you have installed the Web Application Project add-on ... web applica- tion model and not the ASP. NET web site model), be sure to install ASP. NET AJAX after installing Visual Studio 2005 SP1. CHAPTER 5 ■ INTRODUCING SERVER CONTROLS IN ASP. NET AJAX82 828-8...

Ngày tải lên: 05/10/2013, 10:20

... data file is the data container for Scott’s ToDo List application and resides in the App_Data folder of the site. You may have to manually add the ASP. NET user of your machine to this database ... sophisticated apps that need logical and physical separation of the data tier that has complex data objects and a data access layer. Summary The ToDo List application is an excellent example of an ASP. NET ... following scenario: You have a data-driven web page that needs to continuously alert the user with fast changing data, for instance, a page that displays the major financial indices in the U.S. capital...

Ngày tải lên: 05/10/2013, 10:20

... Team LiB ] Recipe 1.7 Connecting to a Named Instance of SQL Server or Microsoft Data Engine (MSDE) Problem You want to connect to a named instance of a SQL Server or Microsoft Data Engine ... ConfigurationSettings.AppSettings[" ;Sql_ Msde_ConnectString"]); Manager and Query Analyzer are also shared. The System.Data.SqlClient class cannot automatically discover the port number of a named instance of SQL Server ... need to understand what a SQL Server or MSDE named instance is and how to connect to one. The sample code contains a single event handler: Connect Button.Click Creates and opens a connection to...

Ngày tải lên: 14/12/2013, 18:16

... Download a shareware database management tool You need a database management tool to create Microsoft SQL Server database and to export/import the Contact List. You can download the Aqua Data Studio ... 3. Navigate to Database > Connection and add a new database handler for Microsoft SQL Server. Click Save to add the database handler to the configuration. 4. Navigate to Database > ... login information when connecting to the database sql scripts Each of the database types has a sql file that you need to: 1. Modify to point to the right database. 2. Run to create the database...

Ngày tải lên: 20/12/2013, 23:15

... several provider-specific connection string attributes in addition to those defined by ADO .NET. To open a database secured by a Microsoft Access database password, use the Jet OLEDB :Database Password ... the password has unrestricted access to the database. The Set Database command from the Tools Security menu is used to set up a database password. The OLE DB provider for Microsoft Jet has several ... obtain access to the database and database objects. This is also known as share-level security. A password does not allow groups or users to have distinct levels of access or permissions. Anyone...

Ngày tải lên: 24/12/2013, 05:15

Ngày tải lên: 24/12/2013, 05:15

Ngày tải lên: 24/12/2013, 06:17

Ngày tải lên: 21/01/2014, 11:20