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C#/.NET interview questions: - What are the steps included to get a collection of records from database in C#?

1.  First you need SQL connection string

2.  Create an object of SqlConnection class as follows.

  SqlConnection connection = new SqlConnection(connectionString)

3.  Create an object of SQLCommand class as follows and assign query and Connection to it as follows.

  SqlCommandcmd = new SqlCommand(“Select * from Employee” , connection);

4.  Create and initialize SqlDataAdatper and pass command object to it.

  SqlDataAdapter da = new SqlDataAdapter(cmd);

5.  Create and initialize datatable object which will store your records set

  DataTabledataTable=new DataTable();

6.  Use the fill method of Adapter class to fire the query and store the resulset in the datatable created in        above step.


7.  Now you can use this datable and bind it to grid or can do other things.

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Shivprasad koirala Koirala
I am a Microsoft MVP for ASP/ASP.NET and currently a CEO of a small E-learning company in India. We are very much active in making training videos , writing books and corporate trainings. Do visit my site for .NET, C# , design pattern , WCF , Silverlight , LINQ , ASP.NET , ADO.NET , Sharepoint , UML , SQL Server training and Interview questions and answers
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