C# tutorial- Database support-Command and DataReader objects

Command and DataReader Objects

Command object represents an arbitrary Sql command to be executed on data through a connection object. It can be used to manipulate data in a table of a database. DataReader object is used to read data from the database.

Example: Read all data from tblimages table


private void getconnection(){

            OleDbCommand cmd;

            OleDbDataReader reader;

            OleDbConnection cn=new OleDbConnection();

            //Set connection string

            cn.ConnectionString="Provider=Microsoft.Jet.Oledb.4.0; Data Source="+ Application.StartupPath+ "\\dbimages.mdb";


            cmd = new OleDbCommand("Select * From tblimages", cn);

            reader = cmd.ExecuteReader();







KrishnaMohan comment


Its simply superb.Feeling good to share the link to practice Csharpinterview questions http://skillgun.com/csharp/interview-questions-and-answers @ http://skillgun.com


This website intents to provide free and high quality tutorials, examples, exercises and solutions, questions and answers of programming and scripting languages:
C, C++, C#, Java, VB.NET, Python, VBA,PHP & Mysql, SQL, JSP, ASP.NET,HTML, CSS, JQuery, JavaScript and other applications such as MS Excel, MS Access, and MS Word. However, we don't guarantee all things of the web are accurate. If you find any error, please report it then we will take actions to correct it as soon as possible.