What is DataReader and DataSet?

What is DataReader and DataSet?

Dataset is used to hold tables with data. DataReader is designed to retrieve a read-only, forward-only stream of data from data sources. DataReader has a connection oriented nature, whenever you want fetch the data from database that you must have a connection.

How do I turn off DataReader?

You should always call the Close method when you have finished using the DataReader object….The following code example iterates through a DataReader object, and returns two columns from each row.

1. while (myReader.Read())
2. Console. WriteLine(“\t{0}\t{1}”, myReader. GetInt32(0), myReader. GetString(1));
3. myReader. Close();

Is DataSet faster than DataReader?

DataReader provides faster performance, but has read-only and forward-only access. DataSet, on the other hand, is high resource-consuming, but offers more control and a disconnected nature.

What is DataReader object?

In ADO.NET, a DataReader is a broad category of objects used to sequentially read data from a data source. DataReaders provide a very efficient way to access data, and can be thought of as a Firehose cursor from ASP Classic, except that no server-side cursor is used.

Should I dispose SqlDataReader?

Do not call Close or Dispose on a Connection, a DataReader, or any other managed object in the Finalize method of your class. In a finalizer, you should only release unmanaged resources that your class owns directly.

Which is faster DataAdapter vs DataReader?

Datareaders are fast compare to DataAdapters/DataSets because of the following reason. DataReader offers better performance because it avoids the performance and memory overhead associated with the creation of the DataSet.

What is the use of DataSet?

Data sets can hold information such as medical records or insurance records, to be used by a program running on the system. Data sets are also used to store information needed by applications or the operating system itself, such as source programs, macro libraries, or system variables or parameters.

How does DataSet differ from a DataReader?

DataReader cannot update/manipulate data back to database. It retrieve data from single table. As it is connected architecture, data is available as long as the connection exists. DataSet is in-memory tables.