The results of the SQL query are displayed in a message box. The myReader.Read method returns a boolean value, which indicates whether there are more records to be read. Results = results & myReader.GetString(0) & vbTab & _ To display the query results, add the following code to the Form1_Load event procedure: 'Concatenate the query result into a string. When the m圜md.ExecuteReader method is executed, SqlCommand retrieves two fields from the Employees table and creates a SqlDataReader object. Use the SqlDataReader object to retrieve data from SQL ServerĪdd the following code to the Form1_Load event procedure: myReader = m圜md.ExecuteReader() SqlConnection uses your Windows logon details to connect to the Northwind database on your computer. M圜md.CommandText = "SELECT FirstName, LastName FROM Employees" To set up the Command object, which contains the SQL query, add the following code to the Form1_Load event procedure: 'Create a Command object. "Data Source=localhost Integrated Security=SSPI ") M圜onn = New SqlConnection("Initial Catalog=Northwind " & _ To set up the connection string of the SqlConnection object, add the following code to the Form1_Load event procedure: 'Create a Connection object. Use the SqlConnection object to open SQL Server connection The SqlConnection object establishes a database connection, the SqlCommand object runs a query against the database, and the SqlDataReader object retrieves the results of the query. Modify the Form1 class as follows: Public Class Form1 If the service isn't running, click Start.Ĭlose the SQL Server Service Manager dialog box. Set the Server property to the name of your computer, and then set the Services property to MSSQLServer. In the first line of Form1.vb, add a reference to the ADO.NET namespace as follows: Imports įrom the Windows Start menu, point to Programs, point to Microsoft SQL Server, and then click SQL Server Service Manager to ensure that the SQL Server service is running on your computer. NET, and create a new Visual Basic Windows Application project named SQLDataAccess. SQL Server concepts and Transact-SQL (T-SQL) syntaxĬreate Visual Basic.This article assumes that you're familiar with the following topics: In addition, the user must be able to use Windows Integrated Security to connect to SQL Server. NET must be installed and running on the same computer. The following list outlines the required hardware, software, network infrastructure, and service packs that you need: The code samples in this article use the SqlConnection, SqlCommand, and SqlDataReader ADO.NET objects. In this article, connections are set up both programmatically and using the Visual Studio. You can access ADO classes through the namespace to provide support for OLE DB databases. The namespace describes a collection of classes that are used to programmatically access a SQL Server data source. ADO.NET gathers all of the classes that are required for data handling. This article describes how you can use ADO.NET to open a SQL Server database by using the SQL Server. This article provides information about how to open SQL Server databases by using SQL Server.
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