How does DataSet work in C#?

Dataset is the local copy of your database which exists in the local system and makes the application execute faster and reliable. DataSet works like a real database with an entire set of data which includes the constraints, relationship among tables, and so on. It will be found in the namespace “System. Data”.

How do you populate a DataSet in C#?


  1. Create a query string.
  2. Create a connection object and open it.
  3. Create a SqlDataAdapter object accompanying the query string and connection object.
  4. Create a DataSet object.
  5. Use the Fill method of SqlDataAdapter object to fill the DataSet with the result of query string.
  6. Close the connection object.

How do you use a DataSet?

In order to use a Dataset we need three steps:

  1. Importing Data. Create a Dataset instance from some data.
  2. Create an Iterator. By using the created dataset to make an Iterator instance to iterate through the dataset.
  3. Consuming Data. By using the created iterator we can get the elements from the dataset to feed the model.

What are the advantages of using DataSet in C#?

Answers. If you are only pulling data to read or populate static objects then a data reader is faster and more efficient. If you are pulling data back to perform ongoing calculations or operations with the data and then insert, delete, or update the database a dataset is more efficient.

What is the difference between DataSet and database?

A dataset is a structured collection of data generally associated with a unique body of work. A database is an organized collection of data stored as multiple datasets.

How do you load data in a DataSet?

There are several different ways to populate the DataSet. For example, you can use LINQ to SQL to query the database and load the results into the DataSet. For more information, see LINQ to SQL. Another common way to load data into a DataSet is to use the DataAdapter class to retrieve data from the database.

How do you fill data in a DataSet?

The Fill method of the DataAdapter is used to populate a DataSet with the results of the SelectCommand of the DataAdapter . Fill takes as its arguments a DataSet to be populated, and a DataTable object, or the name of the DataTable to be filled with the rows returned from the SelectCommand .

What is the purpose of a dataset?

The purpose of DataSets is to avoid directly communicating with the database using simple SQL statements. The purpose of a DataSet is to act as a cheap local copy of the data you care about so that you do not have to keep on making expensive high-latency calls to the database.

What is difference between dataset and database?

Which is better DataSet or DataTable?

If we are going to fetch data from a single database table then DataTable is better choice. While DataSet on the other hand can define DataRelations – which define the relationship between DataTables, much like a foreign key relationship can be set up between tables in a database.