Executing a Query That Returns a Single Value : SqlCommand « ADO.Net « C# / CSharp Tutorial

1.	Language Basics
2.	Data Type
3.	Operator
4.	Statement
5.	String
6.	struct
7.	Class
8.	Operator Overload
9.	delegate
10.	Attribute
11.	Data Structure
12.	Assembly
13.	Date Time
14.	Development
15.	File Directory Stream
16.	Preprocessing Directives
17.	Regular Expression
18.	Generic
19.	Reflection
20.	Thread
21.	I18N Internationalization
22.	LINQ
23.	GUI Windows Forms
24.	Windows Presentation Foundation
25.	Windows Communication Foundation
26.	Workflow
27.	2D
28.	Design Patterns
29.	Windows
30.	XML
31.	XML LINQ
32.	ADO.Net
33.	Network
34.	Directory Services
35.	Security
36.	unsafe

C# / C Sharp

C# / C Sharp by API

C# / CSharp Open Source

C# / CSharp Tutorial » ADO.Net » SqlCommand

32.18.15.Executing a Query That Returns a Single Value

using System;

using System.Data;

using System.Data.SqlClient;



    class Program

    {

        static void Main(string[] args)

        {

            string sqlConnectString = "Data Source=(local);Integrated security=SSPI;Initial Catalog=AdventureWorks;";



            string sqlSelect = "SELECT COUNT(*) FROM Person.Contact";



            SqlConnection connection = new SqlConnection(sqlConnectString);

            SqlCommand command = new SqlCommand(sqlSelect, connection);

            connection.Open( );



            int count = Convert.ToInt32(command.ExecuteScalar( ));

            connection.Close( );



            Console.WriteLine("Record count in Person.Contact = {0}", count);

        }

    }

32.18.SqlCommand
	32.18.1.	Create a SqlCommand
	32.18.2.	Create SqlCommand with both sql query and connection
	32.18.3.	SqlCommand: AutoClose
	32.18.4.	Execute two sql commands
	32.18.5.	Asynchronous Processing Sql command
	32.18.6.	Start process of retrieving a data reader asynchronously, check the IsCompleted property value.
	32.18.7.	SqlCommand with Callback Handler
	32.18.8.	Add parameters to the SqlCommand
	32.18.9.	SQL StoredProcedure
	32.18.10.	Execute Scalar with SqlCommand
	32.18.11.	Execute the scalar SQL statement and store results
	32.18.12.	Executing a Parameterized Query with SqlCommand
	32.18.13.	Batch Update Demo
	32.18.14.	Execute update statement with SqlCommand against MDF file
	32.18.15.	Executing a Query That Returns a Single Value
	32.18.16.	Async Command Object Demo

www.java2java.com | Contact Us

All other trademarks are property of their respective owners.