adding tables to a database

... 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 ... 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 // Namespaces, variables, and constants ... String createSql = "CREATE TABLE MyTable " + "(MyTableId int IDENTITY(1,1) PRIMARY KEY CLUSTERED)"; SqlCommand cmd = new SqlCommand(createSql, conn); // Create the table...

Ngày tải lên: 21/01/2014, 11:20

... 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", ... da.SelectCommand.Connection); da.UpdateCommand.CommandType = CommandType.Text; da.UpdateCommand.Parameters.Add("@Id", SqlDbType.Int, 0, "Id"); da.UpdateCommand.Parameters.Add("@XmlField",...

Ngày tải lên: 24/12/2013, 05:15

... Server and a DataSet object. You'll learn the details on how to pull rows from the database into a DataSet in Chapter 10 , and how to push changes made in a DataSet to the database in Chapter ... property, as shown in Figure 6.11 . Using a DataGrid Control to Access a Database In this section, you'll learn how to use a DataGrid control to access the rows in a database table. Follow ... 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 the...

Ngày tải lên: 07/11/2013, 10:15

... 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 ... database to be established when there's a suitable connection already available. When you close a connection, that connection isn't actually closed; instead, your connection is marked as ... System.Data; using System.Data.SqlClient; class ConnectionPooling { public static void Main() { // create a SqlConnection object to connect to the database, // setting max pool size to...

Ngày tải lên: 07/11/2013, 10:15

... 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 ... request to the database; two examples of states are open and closed. You use the Connection object's State property to get the current state of the connection to the database. The State property ... SqlConnection("server=localhost ;database= Northwind;uid=sa;pwd=sa"); // monitor the StateChange event using the StateChangeHandler() method mySqlConnection.StateChange += new StateChangeEventHandler(StateChangeHandler);...

Ngày tải lên: 14/12/2013, 13:15

... 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

... 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

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... Between the Strategic Plan and the Operational Plan 213 Analysis of Company Performance 214 Analysis of Competition 215 Analysis of Market and Market Share 216 Analysis of Mission 217 Analysis of ... performance that must be tracked against the business plan. They are organizational, team, and individual. All lead to the strategic goals. Figure 12-4. During the sustaining phase you must pay attention ... is a fantasy tale, there are important messages that we can translate into your business planning. T HE T HREE R EASONS C OMPANY S TORIES F ALL S HORT OF E XPECTATIONS The company story is a...

Ngày tải lên: 21/09/2012, 17:33

... wake at 6 a. m., but nap for two hours or so in the early afternoon. Thus the influence on one's sleep pattern is worthy of consideration when choosing an occupation. ...

Ngày tải lên: 04/10/2012, 10:02

Ngày tải lên: 04/10/2012, 10:24

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