connecting to a database using c

... 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

... 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

Ngày tải lên: 20/08/2013, 15:08

... by 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 ... 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 ... 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

... fill a DataSet using a DataAdapter or to create a DataReader. For example: SELECT * FROM [MySheet$] Update data The UPDATE command, either static or parameterized, can update data in a worksheet ... DB provider to access Microsoft Excel as a data source. The Jet database engine can access other database file formats through Indexed Sequential Access Method (ISAM) drivers specified in the ... either a DataAdapter or a DataReader to retrieve data from an Excel workbook. Create a SQL SELECT statement referencing a worksheet or a range in an Excel workbook and execute the statement to...

Ngày tải lên: 14/12/2013, 18:16

... 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 ... 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 ... [ 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...

Ngày tải lên: 14/12/2013, 18:16

... doesn't maintain an active connection to the database. Disconnected DataSet objects act as a data cache in applications. You can modify the data in the DataSet, and later reopen the connection ... data, and it is not a good practice to keep a database connection open for an extended period of time. Instead, a better approach is to connect to the database, fetch the data into a DataSet ... connection and send the changes back to the database. You can manually open a connection to a database by creating a SqlConnection object, setting its ConnectionString property, and then calling...

Ngày tải lên: 15/12/2013, 00:15

... provider can read records from and insert records into a text file data source. The Jet database engine can access other database file formats through Indexed Sequential Access Method (ISAM) drivers ... Problem You want to use ADO.NET to access data stored in a text file. Solution Use the OLE DB Jet provider to access data in a text file. The sample code creates an OleDbDataAdapter that uses the ... many rows should be scanned to automatically determine column type. A value of 0 indicates that all rows should be scanned. The ColN entries specify the name, width, and data type for each column....

Ngày tải lên: 24/12/2013, 05:15

... same computer as IIS and that all application users are on the same domain so that their credentials are available to IIS. The following areas of the application need to be configured: ã Configure ... the ASP.NET application so that Integrated Windows Authentication is enabled and Anonymous Access is disabled. ã The web.config file establishes the authentication mode that the application ... [ Team LiB ] Recipe 1.8 Connecting to SQL Server Using Integrated Security from ASP.NET Problem You want to coordinate Windows security accounts between an ASP.NET application and SQL...

Ngày tải lên: 24/12/2013, 05:15

... 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 ... da.SelectCommand.Connection); da.UpdateCommand.CommandType = CommandType.Text; da.UpdateCommand.Parameters.Add("@Id", SqlDbType.Int, 0, "Id"); da.UpdateCommand.Parameters.Add("@XmlField", ... sampleXmlButton_Click(object sender, System.EventArgs e) { DataSet ds = new DataSet( ); // Fill the Categories table and add it to the DataSet. SqlDataAdapter da = new SqlDataAdapter("SELECT TOP...

Ngày tải lên: 24/12/2013, 05:15

... 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

Ngày tải lên: 24/10/2014, 10:51

... into a DataSet in Chapter 10 , and how to push changes made in a DataSet to the database in Chapter 11. You can drag a table from a SQL Server database onto your form and have the SqlConnection ... object to connect to a SQL Server database, and a SqlDataAdapter object to move rows between SQL Server and a DataSet object. You'll learn the details on how to pull rows from the database ... information stored in the database. A DataSet object can represent database structures such as tables, rows, and columns, among others. In this example, you'll use a DataSet object to store...

Ngày tải lên: 07/11/2013, 10:15

... connect to the // database, passing the connection string to the constructor SqlConnection mySqlConnection = Using a SqlConnection Object to Connect to a SQL Server Database You create a SqlConnection ... Opening and closing a database connection is a relatively time-consuming process. For this 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 database to be established when there's a suitable connection already available. When you close a...

Ngày tải lên: 07/11/2013, 10:15

... the Connection and reopen it. Closed The Connection is closed. Connecting The Connection is establishing access to the database. Executing The Connection is running a command. Fetching The Connection ... StateChange event of the mySqlConnection object: // open mySqlConnection mySqlConnection.Open(); // create a SqlCommand object SqlCommand mySqlCommand = mySqlConnection.CreateCommand(); ... 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...

Ngày tải lên: 14/12/2013, 13:15

Ngày tải lên: 21/01/2014, 11:20

... Microsoft Oracle .NET data provider accesses an Oracle database using the Oracle Call Interface (OCI) through Oracle client connectivity software. The provider can access Oracle 7.3.4 or later ... from applications that already use ODBC. Use a native Oracle .NET data provider where practical. TNSNAMES.ORA Oracle uses a configuration file named TNSNAMES.ORA to locate the Oracle database ... primarily as a bridge from applications that already use OLE DB. Use a native Oracle .NET data provider where practical. ODBC Finally, the ODBC .NET data provider can connect to an Oracle database. ...

Ngày tải lên: 24/12/2013, 05:15

... Core StickyNote service create-note EPR2 (EPR2 = EPR1 + Key1) EPR1 key1 A Runtime Example of EPR Creation How to Build a Service Using GT4 Globus Alliance Staff Rachana Ananthakrishnan, Charles Bacon, Lisa ... state, but are accessed via the same service April 2005 How to Build a Service Using GT4 38 GT4 Java WS Core StickyNote service EPR2 create-note EPR1 key1 A Runtime Example of EPR Creation April ... 19 1. Deployment: Stand up a StickyNote service 2. State Management I: Create Resources StickyNote Resource Client Exercise 2: State Management I April 2005 How to Build a Service Using GT4 42 GT4 Java WS...

Ngày tải lên: 07/01/2014, 01:19

Ngày tải lên: 21/01/2014, 12:20

Ngày tải lên: 07/03/2014, 14:20