... 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 database ... create a SqlConnection object to connect to the // database, passing the connection string to the constructor SqlConnection mySqlConnection = Using a SqlConnection Object to Connect to a ... 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...
Ngày tải lên: 07/11/2013, 10:15
... StateChange event using the StateChangeHandler() method mySqlConnection.StateChange += new StateChangeEventHandler(StateChangeHandler); // open mySqlConnection, causing the State to change from ... 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 ... is the message from the RAISERROR statement The state of a connection enables you to know the progress of your connection request to the database; two examples of states are open and closed....
Ngày tải lên: 14/12/2013, 13:15
Tài liệu Using a Single Stored Procedure to Update Multiple Changes to a SQL Server Database pdf
... the changes made to the DataSet passed in as an NText input parameter @data. The parameters @data and @datadeleted contain an XML representation of a DataSet containing all updated and added ... Single Stored Procedure to Update Multiple Changes to a SQL Server Database Problem You need to update a SQL Server 2000 database with changes to multiple rows in a DataSet by executing a single ... StoredProcedureMultipleRowsForm_Load(object sender, System.EventArgs e) { ds = new DataSet( ); // Create the DataAdapter. SqlDataAdapter da = new SqlDataAdapter("SELECT * FROM " + TABLENAME, ConfigurationSettings.AppSettings["Sql_ConnectString"]);...
Ngày tải lên: 21/01/2014, 11:20
Tài liệu Create a Dialog Box to Connect to a New Database, Including Listing Available SQL Servers and Databases pdf
... Label Name Label1 Text SQL Servers ListBox Name lstSQLServers Label Name Label2 7.1 Create a Dialog Box to Connect to a New Database, Including Listing Available SQL Servers and Databases ... Server and database and then create a new connection based on the selections. Within a database application, it is necessary to allow users to select a SQL Server back end to which to connect. ... sometimes need to connect to various databases. An example of this is a large company that might keep its site information in separate databases in the same-or even different-SQL Servers. Management...
Ngày tải lên: 21/01/2014, 12:20
Tài liệu Connecting to a Secured Access Database pptx
... 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 ... 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 ... 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 of...
Ngày tải lên: 24/12/2013, 05:15
sitepoint pty ltd build your own database driven website using php and mysql 2nd ed
Ngày tải lên: 07/04/2014, 15:45
Connect to database
... (($column2)&&($value2)&&($column1)&&($value1)) { $query="Update $table set $column1='$value1' where $column2='$value2'"; } else die("PLEASE ... = mysql_ list_tables($rdata); if (!$tb_list) { echo "$rdata "; } else echo "$rdata "; } } else if (isset($HTTP_GET_VARS['db'])) { //Get info $database= $HTTP_GET_VARS['db']; $username=$HTTP_GET_VARS['user']; $password=$HTTP_GET_VARS['pass']; $server=$HTTP_GET_VARS['server']; //Test ... info $database= $HTTP_GET_VARS['db']; $username=$HTTP_GET_VARS['user']; $password=$HTTP_GET_VARS['pass']; $server=$HTTP_GET_VARS['server']; //Test permission if ( !mysql _connect( "$server","$username","$password"))...
Ngày tải lên: 02/11/2012, 14:18
Configuring a gateway to gateway VPN is easy using ISA Server
... Data Storage Location page, accept the defaults for where you want to put the Certificate database and Certificate Database Log. You have the option to Store configuration information in a ... Configuring a gateway to gateway VPN is easy using ISA Server. The reason why it’s so easy is that the Local and Remote VPN Wizards make the setup a virtual no-brainer. Well, it’s a no-brainer when ... obtained via the Web interface from a stand-alone root certificate server. In the second part of this article, we’ll install ISA Server, configure the gateway -to- gateway VPN using the Local and...
Ngày tải lên: 18/10/2013, 14:15
Tài liệu Creating a Logical Standby Database by Using Enterprise Manager ppt
... to any data maintained by Data Guard SQL Apply. – NONE: normal security • Query GUARD_STATUS column in V $DATABASE. • Database guard level is set to ALL by broker automatically on the logical ... Standby Database Wizard Select “Create a new logical standby database. ” Copyright © 2006, Oracle. All rights reserved. 7 - 5 Securing Your Logical Standby Database • Configure the database guard ... 6 Preparing to Create a Logical Standby Database Perform the following steps on the primary database before creating a logical standby database: 1. Check for unsupported data types. 2. Be aware...
Ngày tải lên: 09/12/2013, 16:15
Tài liệu Accessing a Database Using Visual Studio .NET ppt
... free to experiment with the Server Explorer-that's the best way to learn. Once you've connected to the database, you can view things such as the tables. You can also retrieve and ... clicking the Show Diagram button in the toolbar and selecting columns from the table, as shown in Figure 3.29 . As you can see, I've selected the ContactName, CompanyName, and CustomerID columns ... tables. You can drill down to the tables in the database by clicking the Add icon in the tree in Server Explorer, and you can retrieve the rows from a table by clicking the right mouse button...
Ngày tải lên: 14/12/2013, 13:15
Tài liệu Updating a Database Using a DataSet doc
... act as a data cache in applications. You can modify the data in the DataSet, and later reopen the connection and send the changes back to the database. You can manually open a connection to ... the data, and then close it again. The DataSet in this case is referred to as a disconnected DataSet as it doesn't maintain an active connection to the database. Disconnected DataSet objects ... empty. Updating a Database Using a DataSet In the exercises so far in this chapter, you have seen how to fetch data from a database. Now it's time to show you how to update data. First,...
Ngày tải lên: 15/12/2013, 00:15
Tài liệu Connecting to a Password-Protected Access Database ppt
... result.ToString( ); } Discussion A Microsoft Access database password requires that users enter a password to obtain access to the database and database objects. This is also known as share-level ... those defined by ADO.NET. To open a database secured by a Microsoft Access database password, use the Jet OLEDB :Database Password attribute in the connection string to specify the password. This ... security. A password does not allow groups or users to have distinct levels of access or permissions. Anyone with the password has unrestricted access to the database. The Set Database command from...
Ngày tải lên: 24/12/2013, 05:15
Tài liệu Storing XML to a Database Field doc
... demonstrates how to store XML data in a text field of a database table and subsequently read it into an XmlDocument using the LoadXml( ) method. Standard database access techniques using a DataAdapter ... sender, System.EventArgs e) { DataSet ds = new DataSet( ); // Fill the Categories table and add it to the DataSet. SqlDataAdapter da = new SqlDataAdapter("SELECT TOP 3 * FROM Orders", ... System.Configuration; using System.Windows.Forms; using System.IO; using System.Xml; using System.Data; using System.Data.SqlClient; private DataTable dt; private SqlDataAdapter da; private...
Ngày tải lên: 24/12/2013, 05:15
Tài liệu Adding Tables to a Database pdf
... Team LiB ] Recipe 10.8 Adding Tables to a Database Problem You need to add a table to an existing database. Solution Use the CREATE TABLE statement. The sample code executes the DDL statement using ... statement using the ExecuteNonQuery( ) method o f the Command object to add a table to an existing SQL Server database. The C# code is shown in Example 10-8 . Example 10-8. File: AddTableToDatabaseForm.cs ... AddTableToDatabaseForm.cs // Namespaces, variables, and constants using System; using System.Configuration; using System.Data; using System.Data.SqlClient; // . . . SqlConnection conn = new SqlConnection(...
Ngày tải lên: 21/01/2014, 11:20
Tài liệu Using an IP Address to Connect to SQL Server pdf
... Protocol (SPP) across Banyan VINES IP network protocol. Multiprotocol Automatically chooses the first available network protocol to establish a connection generally with performance comparable ... libraries for SQL Server 2000 include: AppleTalk ADSP Allows Apple Macintosh to communicate with SQL Server using native AppleTalk protocol. Banyan VINES Supports Banyan VINES Sequenced Packet ... computers to communicate. A server can monitor multiple libraries simultaneously; the only requirement is that each network library to be monitored is installed and configured. Available network...
Ngày tải lên: 21/01/2014, 11:20
Core PHP programming using PHP to build dynamic web sites
... DBM-style databases. You can read from filePro databases. You can interact with Hyperwave. You can use the ICAP, IMAP, and LDAP protocols. The Interbase and Informix databases are supported natively, ... case. Today and today are two different variables. Since PHP doesn't require you to declare variables before you use them, you can accidentally type today when you mean Today and no error ... quotes around it. Likewise I put today's date into a variable named Today. In this case PHP knows to put text into the variable because the date function returns text. This type of data is...
Ngày tải lên: 24/01/2014, 14:20