ADO .NET is a technology that was developed by Microsoft technology and it is also built on the .NET framework. The acronym for ADO is ActiveX Data Objects. ADO.NET gives us the facility to set up a bridge between backend technology and a database. However, this database could be both relational as well as non-relational.

According to Wikipedia – “ADO .NET is a data access technology from the Microsoft.NET Framework that provides communication between relational and non-relational systems through a common set of components. ADO .NET is a set of computer software components that programmers can use to access data and data services from a database. It is a part of the base class library that is included with the Microsoft.NET Framework”.

ADO stands for ActiveX Data Objects and it relies on COM whereas ADO .NET relies on managed providers defined by the .NET CLR (Common Language Runtime). ADO .NET provides consistent access to data sources such as SQL Server, as well as data sources exposed through OLE DB and XML. While there are similarities between ADO and ADO .NET, the way they operate and their foundations are quite different. The following are some Advantages of ADO .Net over ADO at a basic level.

A major difference in creating connections with ADO and ADO .NET is that ADO fits all connections to all types of data sources into a single Connection object. ADO .NET can have separate Objects that represent connections to different data sources. In ADO .NET you can create multiple data provider namespaces to connect specifically with a particular data source, making access faster and more efficient and allowing each namespace to exploit the features of its targeted data provider.

connection = new SqlConnection("connetionString");

connection = new OleDbConnection("connetionString");

ADO allows you to create client-side cursors only whereas ADO .NET gives you the choice of either using client-side or server-side cursors.

ADO .NET introduces a new way of getting a single value from a query's results when you expect only one row and one column to return. The ADO .NET command object has an ExecuteScalar method which returns the first row and column's value from its associated query.

ADO .Net dataset represents the in-memory representation of a database. ADO recordsets are merely a set of rows retrieved from a data source.

ADO recordsets can hold data from one data source at a time. ADO .Net datasets can hold data from various sources and integrate the data and write it back to one or several data sources.

The ADO .NET Framework supports two models of Data Access Architecture, Connection-Oriented Data Access Architecture and Disconnected Data Access Architecture.

In the case of Data Communication, ADO objects communicate in binary mode while ADO .NET uses XML for passing the data.

The ability to communicate across heterogeneous environments.

All communication involves data exchange, whether the communication between distributed components is through a request/response methodology or a message-based facility. Current distributed systems assume that the components involved in the communication are using the same protocol and data format. This assumption is too restrictive for a client base to expand across an enterprise or for multiple companies. Data-access layers should impose no such restrictions.

ADO.NET addresses the common data-exchange limitation by using XML as its payload data format. Since XML is text-based and simple to parse, it’s a good choice for a common, platform-independent, and transportable data format. Furthermore, because XML is nothing more than structured text, employing XML as the data format on top of the HTTP network protocol minimizes firewall-related problems. With ADO and its XML format, the clients do not have to know COM to de-serialize the packaged data. All they need is an XML parser, which is readily available in many flavors on many different platforms. The data producers and consumers need only adhere to the XML schema to exchange data among themselves.

The ability to serve a growing number of clients without degrading system performance.

ADO .NET moves away from the client/server model by promoting the use of disconnected datasets. When a client requests some data, the data is retrieved, it’s transferred to the client, and—as soon as possible—the connection is torn down. Since the connection between the client and the data source is short-lived, this technique allows more clients to request information from the server, thus solving the problem of limited connections.

You might think that setting up and tearing down connections is not a good idea since the cost of establishing a connection is usually high. This is a concern only in the absence of connection pooling. ADO .NET automatically keeps connections to a data source in a pool, so when an application thinks it is tearing down a connection, it’s returning it to the resource pool. This allows connections to be reused, avoiding the cost of reconstructing new connections from scratch.

Working with data in this disconnected fashion is not new to ADO programmers. The disconnected record set was introduced in early versions of ADO. However, in ADO, it is up to the developer to implement this feature, whereas, in ADO.NET, data is disconnected by nature.

The ability to quickly develop robust data access applications using ADO.NET’s rich and extensible component object model.

ADO . NET’s rich data access classes allow developers to boost their productivity. Current ADO developers should have no problems getting up to speed with the object model because ADO .NET is a natural evolution of ADO. The core functionality remains the same. With ADO .NET, the functionality is factored and distributed to each object in the model—much better than in previous versions of ADO. For example, the connection object is responsible only for connecting to and disconnecting from the data source. In ADO .NET, we can no longer execute a query directly through the connection object. Although some developers might miss this ability, it is a step in the right direction for the cohesion of component development.

ADO .NET also boosts developers’ productivity through extensibility. Because ADO .NET framework classes are managed code, developers can inherit and extend these classes to their custom needs. If you prefer not to do this low-level legwork, you can use Visual Studio. NET data-design environment to generate these classes for you.

In short, ADO .NET improves developers’ productivity through its rich and extensible framework classes. These features are complemented by the rich toolsets for ADO .NET in Visual Studio .NET, which enable rapid application development.

An improvement over previous ADO versions due to the disconnected data model.

Because ADO .NET is mainly about disconnected datasets, the system benefits from improved performance and scalability. The database server is no longer a bottleneck when the number of connection requests goes up. Data Providers in ADO .NET also enable implicit connection pooling, which reduces the time required to open a connection.

The previous marshaling of recordsets required type conversion to make sure that the data types were all COM-based. Since the disconnected dataset is in XML format, there is no need for this type of conversion during transport, as opposed to dealing with data in Network Data Representation format.

With the ADO .NET architecture, the data providers can be optimized for better performance by talking directly to the database server.

Today we will discuss the overview of ADO .NET 

Overview of ADO .NET

ADO .Net provides a bridge between the front cease controls and the returned give-up database. The ado.Net gadgets encapsulate all of the records get admission to operations and the controls interact with those objects to display facts, as a result hiding the details of the motion of data.

The following figure shows the ADO .NET objects at a glance:

The dataset represents a subset of the database. It does not have a non-stop connection to the database. To replace the database a reconnection is required. The dataset carries datatable objects and data relation items. The data relation objects represent the relationship between two tables.

The following table shows some important properties of the DataSet class:

The following table shows some important methods of the DataSet class:

The DataTable class represents the tables in the database. It has the following important properties; most of these properties are read-only properties except the PrimaryKey property:

Returns the collection of child relationships.

Gets or sets an array of columns as the primary key for the table.

The following table shows some important methods of the DataTable class:

Commits all changes since the last AcceptChanges.

Returns a copy of the DataTable with all changes made since the AcceptChanges method was called.

Finds and updates a specific row, or creates a new one, if not found any.

Rolls back all changes made since the last call to AcceptChanges.

The DataRow object represents a row in a table. It has the following important properties:

Gets or sets the data stored in a specific column.

The following table shows some important methods of the DataRow class:

Today we will discuss the above ADO .Net.

ADO  .Net

There are three different layers of ADO.NET they are:

DataSet object is one of the major components of ADO.NET. It always remains disconnected from the database and reduces the load on the database.

Following are the data providers used in ADO.NET:

Dataview is used to represent a whole table or a part of the table. It is used for sorting and searching data in the data table.

Connection-Oriented means: connection is exist throw out your process. Example : using DataReader in ADO.NET you can get data as connection oriented database connection type.

Connection Less means: Your connection is not available throw out your whole process. Example: using DataAdapter in ADO.NET you can get data as connection less database connection type.

ADO.NET components are categorized in three modes:

No. It is read-only and forward-only control, so it is not possible to edit data in a repeater control.

The DataReader object of ADO.NET is used to provide access to data from a specified data source. It contains classes to sequentially read data from a data source like Oracle, MS Access, SQL Server, etc.

Data Adapter is a part of the ADO.NET data provider which acts as a communicator between Dataset and the Data source. This Data adapter can perform Select, Insert, Update and Delete operations in the requested data source.

Data view is the representation of data in various formats and it can be requested by the users. Data can be exposed in different sort orders or filter on the user condition with the help of Data view. Data Customization is also possible through Data View.

Connection pooling consists of database connection so that the connection can be used or reused whenever there is request to the database. This pooling technique enhances the performance of executing the database commands. This pooling definitely reduces our time and effort.

Object pooling is nothing but a repository of the objects in memory which can be used later. This object pooling reduces the load of object creation when it is needed. Whenever there is a need of object, object pool manager will take the request and serve accordingly.

A Dataset is set to be collection of data with a tabular column representation. Each column in the table represents a variable and the row represents to value of a variable. This Dataset object can be obtained from the database values.

These are the main differences between ADO and ADO.NET:

The objects of ado communicate in binary mode.

It supports mostly connection oriented models.

It derives information about data implicitly at runtime based on metadata, so it is a costly process.

It uses known metadata at design time, so it provides better runtime performance and more consistent runtime behavior.

It supports both client side and server side cursors.

Datareader is an object of ADO.Net which provides access to data from a specified data source. It consists of classes which sequentially read data from a data source like Oracle, SQL or Access.

Yes, you can load multiple tables in a dataset.

There are two essential objects of ADO.Net there are:

ADO.Net is commonly termed as ActiveX Data Objects which is a part of .Net Framework. ADO.Net framework has set of classes which are used to handle data access by connecting with different databases like SQL, Access, Oracle, etc…

ADO.NET is a data access technology from the Microsoft .NET Framework that provides communication between relational and non-relational systems through a common set of components. ADO.NET is a set of computer software components that programmers can use to access data and data services from a database.

ADO .Net

I want to research ADO.Net to build packages primarily based on MS Office. I've examine a bargain about ADO.Net inside the MSDN library, but everything appears rather messy to me.

What are the fundamentals one ought to parent out when the usage of ADO.NET? I think a few key words will suffice to let me organize my learning. 

How to learn ADO.NET

I simply saw this topic: data table vs dataset however it failed to clear up my doubt .. Let me give an explanation for higher, I was doing reference to database and wished to reveal the consequences in a grid view. (I used record set when I worked with VB6 while ago and dataset is quite much like it so was an awful lot less complicated to apply dataset.)Then a man advised me dataset wasn't the exceptional method to do.

What's better: DataSet or DataReader?

We wanted to know whether QueryNotifications is supported in Azure SQL Server.

Here is the reference url of QueryNotifications - https://docs.microsoft.com/en-us/dotnet/framework/data/adonet/sql/query-notifications-in-sql-server

however nowhere it is mentioned whether it is supported with Azure SQL or not

Does Azure SQL Server supports Query Notifications?

I need NumberOfActive connection pools value out of all the Available Performance Counters (https://docs.microsoft.com/en-us/dotnet/framework/data/adonet/performance-counters). Is there any way to capture the value using python. If not SQL can I get exact SQL query. 

How do I get SQL performance counter counter values (Exclusively Number of active connection pools)

I am looking to enter a random date for a given class in a note when passing a note of a block of text. How does one input and add a random date for a given note text?

using CY.Data.Interface;
using CY.Model;
using System;
using System.Collections.Generic;
using System.Data;
using System.Data.SqlClient;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace CY.Data.Ado
{
  public class NoteRepository : INoteRepository
  {

.....


    public static void RandomDate()
    {

      // 1. Adding the Start Date for the number of time that it is going to start. 
      // 2. Adding the End Date for the time it is going to end. 
      // 3. Adding the range of the time for the total number of days. 
      // 4. Add a int randDays where one converts the rnd.Next to in a Int32 numRange format. 
      // 5. Print a Random Random on a console writeline input. 
      DateTime startDate = DateTime.Now.AddYears(-1);
      DateTime endDate = DateTime.Now;
      double numRange = (endDate - startDate).TotalDays;
      int randDays = rnd.Next(Convert.ToInt32(numRange));
      DateTime randDate = startDate.AddDays(randDays);
      Console.WriteLine(randDate.ToString());
            }
     }
}


The end result should be utilizing a random Date and running it on the browser. How does use ADO.NET to integrate printing a random date on a given note?

How does one use ADO.Net and enter a random date on a notetaking application?

http://www.programmersheaven.com/2/FAQ-ADONET Disconnected architecture is not well suited for desktop clients with multiple updates but most tutorials are oriented towards disconnected ado.net would like to see tuts on connected data access architecture.

Tutorials on connected data access architecture of ADO.Net?

What does "Entity Tracked by Context" mean??

Does same context is used for every request or new context is created for each request (I am using E.F. for Asp.Net MVC APP)

Tracking every entity (loaded) must be adding some memory-overhead on server, is it??

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Trending Blogposts on ADO .Net

Overview of ADO .NET

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openHow to learn ADO.NET

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openWhat's better: DataSet or DataReader?

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openDoes Azure SQL Server supports Query Notifications?

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openHow do I get SQL performance counter counter values (Exclusively Number of active connection pools)

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openHow does one use ADO.Net and enter a random date on a notetaking application?

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openTutorials on connected data access architecture of ADO.Net?

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openWhat does "Entity Tracked by Context" mean in Entity Framework

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