connecting to a access database 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 ... 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 ... 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...

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 ... database. 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 ... 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

... folder containing the database files. The user account requires permissions to access the share that contains the database file and folders. The user account must be recognized by the Access computer. ... a domain user account, add it to the permissions list on both computers. For a user account local to the IIS computer, create a duplicate account on the Access computer with the same name and ... and password. Grant the user account Log on Locally and Access this Computer from the Network permission to access the computer in the local security policy. These permissions are assigned...

Ngày tải lên: 07/11/2013, 13:15

... 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 ... 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 ... 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

... 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 ... System.Data; using System.Data.OleDb; // . . . // Create the data adapter to retrieve all rows from text file. The MaxScanRows option indicates how many rows should be scanned to automatically...

Ngày tải lên: 24/12/2013, 05:15

... 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

... 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. ... Servers and Databases Users 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 ... SQLServer Connect Connection string that connects you to the SQL Server, allowing you access to the databases LoginSecure Flag that specifies that you want to connect to the SQL Server using a trusted...

Ngày tải lên: 21/01/2014, 12:20

Ngày tải lên: 24/10/2014, 10:51

... 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 ... // 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 ... 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

... "Overview of the ADO.NET Classes." Connecting to an Access Database You connect to an Access database using an OleDbConnection object-rather than a SqlConnection object-with a connection string ... provider=MSDAORA;data source=OracleNetServiceName;user id=username;password=password Connecting to Access and Oracle Databases In this section you'll see examples of connecting to both an Access ... Access and an Oracle database. To interact with either of these databases in your program, you use classes from the System.Data.OleDb namespace. This namespace contains classes for use with databases...

Ngày tải lên: 24/12/2013, 01:17

... handler and a single method: Button.Click Allows the user to specify the filename for the new Access database and then calls the CreateAccessDatabase( ) method in the sample to create the database. ... { CreateAccessDatabase(fileName); MessageBox.Show("Microsoft Access database " + fileName + " created.", "Create Access Database& quot;, MessageBoxButtons.OK, ... [ Team LiB ] Recipe 10.6 Creating a New Access Database Problem You need to create a new Microsoft Access database. Solution Use ActiveX Database Objects Extensions (ADOX) from...

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 ... 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 // ... SqlCommand cmd = new SqlCommand(createSql, conn); // Create the table in the database. try { conn.Open( ); cmd.ExecuteNonQuery( ); resultTextBox.Text = "Table created successfully";...

Ngày tải lên: 21/01/2014, 11:20

... SP0811_Update Used to update the table TBL0811 with the changes made to the DataSet passed in as an NText input parameter @data. The parameters @data and @datadeleted contain an XML representation ... which results in the return of a handle to an internal representation to an empty XML document. xpathNamespaces A text parameter that specifies the namespace declarations used in row and column ... cmd.CommandText = STOREDPROCEDURE_NAME; cmd.CommandType = CommandType.StoredProcedure; // Inserted and updated records if (ds.HasChanges(DataRowState.Added | DataRowState.Modified))...

Ngày tải lên: 21/01/2014, 11:20

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