What is a dataset in Ado?
DataSet is a collection of DataTable in ADo.Net, works on disconnected architecture, which means that without having any connection with data source, in DataSet you can manipulate data and save data before finally you save data in database. DataSet use DataAdapter as bridge to fill data from data source.
What is the dataset used for?
It can be used with multiple and differing data sources, with XML data, or to manage data local to the application. The DataSet represents a complete set of data, including related tables, constraints, and relationships among the tables.
What is an ADO NET object?
The ADO.NET objects encapsulate all the data access operations and the controls interact with these objects to display data, thus hiding the details of movement of data. The following figure shows the ADO.NET objects at a glance: The dataset represents a subset of the database.
How to read and write data as XML document in Ado net?
We can use DataRelation object to relate these tables. The DataSet can also be used to read and write data as XML document. ADO.NET provides a DataSet class that can be used to create DataSet object. It contains constructors and methods to perform data related operations.
What is DataSet in ASP.NET example?
Dataset in ASP.NET is nothing but the container of one or more objects of the data table which contained the data retrieved from the database. We can also set the data related to the object of the data table within a single dataset. The data adapter object is allowing to populate the data tables into the dataset.
What do you mean by DataSet?
A data set is a collection of related, discrete items of related data that may be accessed individually or in combination or managed as a whole entity. A data set is organized into some type of data structure.
What is DataSet in C#?
Introduction to Dataset in C# DataSet is a disconnected architecture it represents the data in table structure which means the data into rows and columns. Dataset is the local copy of your database which exists in the local system and makes the application execute faster and reliable.
What are types of data sets?
They are:Numerical data sets.Bivariate data sets.Multivariate data sets.Categorical data sets.Correlation data sets.
What is dataset with example?
A data set is a collection of numbers or values that relate to a particular subject. For example, the test scores of each student in a particular class is a data set. The number of fish eaten by each dolphin at an aquarium is a data set.
What is dataset and types of dataset?
Introduction to DataSet Type. DataSet is normally known as Collection of Data. It is a set or collection of data, which is basically over a tabular pattern. It can be termed as a collection of data where the dataset corresponds to one or more database tables and the row corresponds to data in the set.
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.
What is difference between DataSet and DataTable?
A DataTable object represents tabular data as an in-memory, tabular cache of rows, columns, and constraints. The DataSet consists of a collection of DataTable objects that you can relate to each other with DataRelation objects.
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.
What are 4 types of data?
The data is classified into majorly four categories:Nominal data.Ordinal data.Discrete data.Continuous data.
What are the 3 types of data?
The statistical data is broadly divided into numerical data, categorical data, and original data.
What are the 2 types of data?
There are two general types of data – quantitative and qualitative and both are equally important. You use both types to demonstrate effectiveness, importance or value.
What is DataSet in ADO.NET?
In a simple word, A DataSet is a local copy of your Database Table that gets populated in client PC. It is independent of Data Source and because it exists in the local system, it makes application fast and reliable.
What is DataAdapters?
DataAdapters are used for controlling Datasets and it provides communication between DataSets and DataSource. DataAdapters make a connection with Data Source and then Fill Data to DataSets. It also Updates Data Source with DataSets.
DataSet Example with Grid View
Mostly DataSet is used with GridView in ASP.Net. Here, I have explained DataAdapters and DataSets with Examples.
Updating, Inserting, and Deleting Records in a Dataset
After populating dataset, you can update, insert or delete a record from the dataset. Here is a full programming example.
Summary
In this chapter, you learned how to work with DataSet and DataTable in C# ADO.Net. You can locally work with the dataset and after completing all the modification, save back to the database. In the next chapter, you will learn about DataTables and DataView.
What is a data set in ADO.NET?
The DataSet is a memory-resident representation of data that provides a consistent relational programming model regardless of the data source. It can be used with multiple and differing data sources, with XML data, or to manage data local to the application. The DataSet represents a complete set of data, including related tables, constraints, and relationships among the tables. The following illustration shows the DataSet object model.
What is LINQ to Dataset?
LINQ to DataSet provides language-integrated querying capabilities for disconnected data stored in a DataSet. LINQ to DataSet uses standard LINQ syntax and provides compile-time syntax checking, static typing, and IntelliSense support when you are using the Visual Studio IDE.
What is a data view?
A DataView enables you to create different views of the data stored in a DataTable, a capability that is often used in data-binding applications. Using a DataView, you can expose the data in a table with different sort orders, and you can filter the data by row state or based on a filter expression. For more information, see DataViews.
What is a relationship in a data set?
Relationships enable navigation from one table to another in a DataSet. The essential elements of a DataRelation are the name of the relationship, the name of the tables being related, and the related columns in each table.
Can you fill a data set with XML?
You can fill a DataSet from an XML stream or document. You can use the XML stream or document to supply to the DataSet either data, schema information, or both. The information supplied from the XML stream or document can be combined with existing data or schema information already present in the DataSet.
AcceptChanges ()
This method saves changes which are made with via the UI in a DataSet.
Clone ()
The Clone method copies the structure of a DataSet. Means it copy only schema of the DataSet not a full records of the DataSet.
Copy ()
The Copy method copies entire data including records and schema of a DataSet.
RejectChanges ()
This method discards changes that are made to the DataSet and sets the DataSet to its previous stage.
HasChanges ()
This method returns boolean value to show whether record of DataSet has changed or not. It returns true if any changes have made and false if no any changes made.
Content of This Article
What Is Dataset in ADO.NET?
- In a simple word, A DataSetis a local copy of your Database Table that gets populated in client PC. It is independent of Data Source and because it exists in the local system, it makes application fast and reliable. Accessing Remote Database each time for updating or retrieving details are time-consuming so datasets help you to keep local database ...
What Is Dataadapters?
- DataAdaptersare used for controlling Datasets and it provides communication between DataSets and DataSource. DataAdapters make a connection with Data Source and then Fill Data to DataSets. It also Updates Data Source with DataSets.
Important Data Adapters Properties and Methods
- Methods:
Programming Example in C# Console: Output
Dataset Example with Grid View
- Mostly DataSet is used with GridView in ASP.Net. Here, I have explained DataAdapters and DataSets with Examples. Output
Updating, Inserting, and Deleting Records in A Dataset
- After populating dataset, you can update, insert or delete a record from the dataset. Here is a full programming example. Output If you don’t know row index or unique row number still you can update or edit row in dataset by using following method. Output You can delete row from dataset using Delete()Method. Output
Summary
- In this chapter, you learned how to work with DataSet and DataTable in C# ADO.Net. You can locally work with the dataset and after completing all the modification, save back to the database. In the next chapter, you will learn about DataTables and DataView.