Stored Procedures in VB.NET

The data provider constitutes a comprehensive collection of essential components, encompassing the Connection, Command, DataReader, and DataAdapter objects. Each of these objects plays a crucial role in facilitating database connectivity and data manipulation within ADO.NET.

Among these components, the Command object holds particular significance, as it offers a diverse range of Execute methods. These methods can be utilized to execute SQL queries in a multitude of ways, providing flexibility and adaptability in retrieving and manipulating data from the underlying data source.

Stored procedure

A stored procedure is an executable object that is precompiled and stored within a database. It comprises one or more SQL statements, which are designed to perform specific tasks or operations within the database.

By encapsulating SQL statements within a stored procedure, database administrators and developers can achieve several benefits. Firstly, it enhances code reusability, as stored procedures can be called and executed multiple times from various parts of an application or within different contexts. This eliminates the need to write the same SQL statements repeatedly, resulting in improved efficiency and maintainability.. A sample Stored Procedure is given below :

CREATE PROCEDURE SPPUBLISHER AS SELECT PUB_NAME FROM publishers GO

Utilizing stored procedures in database operations brings several advantages, including encapsulating multiple commands into a single operation, optimizing performance, and adding an extra layer of security. When calling a stored procedure from a VB.NET application, it is necessary to set the CommandType property of the Command object to StoredProcedure.

CommandType to StoredProcedure

By Setting the CommandType to StoredProcedure, you inform the ADO.NET framework that you intend to execute a stored procedure rather than a direct SQL query. This allows the framework to handle the execution appropriately and optimize the communication with the database.

Setting the CommandType property to StoredProcedure ensures that the Command object executes the stored procedure as intended, providing a streamlined approach to interact with the database and promoting efficient performance.

command.CommandType = CommandType.StoredProcedure

From the following source code you can see how to call a stored procedure from VB.NET application.

Full Source VB.NET
Imports System.Data.SqlClient Public Class Form1 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim connetionString As String Dim connection As SqlConnection Dim adapter As SqlDataAdapter Dim command As New SqlCommand Dim ds As New DataSet Dim i As Integer connetionString = "Data Source=servername;Initial Catalog=PUBS;User ID=sa;Password=yourpassword" connection = New SqlConnection(connetionString) connection.Open() command.Connection = connection command.CommandType = CommandType.StoredProcedure command.CommandText = "SPPUBLISHER" adapter = New SqlDataAdapter(command) adapter.Fill(ds) For i = 0 To ds.Tables(0).Rows.Count - 1 MsgBox(ds.Tables(0).Rows(i).Item(0)) Next connection.Close() End Sub End Class





Related Topics
  1. ADO.NET Connection Object
  2. ADO.NET SQL Server Connection
  3. ADO.NET OLEDB Connection
  4. ADO.NET ODBC Connection
  1. ADO.NET Command
  2. ADO.NET ExecuteNonQuery in SqlCommand Object
  3. ADO.NET ExecuteNonQuery in OleDbCommand Object
  4. ADO.NET ExecuteScalar in SqlCommand Object
  5. ADO.NET ExecuteScalar in OleDbCommand Object
  6. ADO.NET ExecuteReader in SqlCommand Object
  7. ADO.NET ExecuteReader in OleDbCommand Object
  8. How to ADO.NET DataReader
  9. How to ADO.NET SqlDataReader
  10. How to ADO.NET OleDbDataReader
  11. How to Multiple Result Sets in ADO.NET
  12. Getting Schema Informations from SqlDataReader
  13. Getting Schema Informations from OleDbDataReader
  14. What is DataAdapter
  15. What is SqlDataAdapter
  16. What is OleDbDataAdapter
  17. Vb.NET ExecuteReader and ExecuteNonQuery

Related Links
  1. Stored Procedure with Parameter