QuestPond’s Interview Questions & Answers on ADO.NET

How is stored procedure different from functions?

  • Function cannot affect the state of the database which means we cannot perform CRUD operation on the database. Stored Procedure can affect the state of the database by using CRUD operations.
  • Store Procedure can return zero or n values whereas Function can return only one value.
  • Store Procedure can have input, output parameters for it whereas functions can have only input parameters.
  • Function can be called from Stored Procedure whereas Stored Procedure cannot be called from Function

How do we use stored procedure in ADO.NET and how do we provide parameters to the stored procedures?

ADO.NET provides the SqlCommand object, which provides the functionality of executing stored procedures. In the command type we need to provide the command type as stored procedure as shown in the below code snippet.

SqlCommand objCommand = new SqlCommand("sp_Insert", objConnection
;
objCommand.CommandType = CommandType.StoredProcedure;
objCommand.ExecuteNonQuery();

See following video on dataset is a disconnected while datareader is connected: –

 

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