What is ADO.NET?What are the key components of ADO.NET?What are the ADO.NET namespaces?What is the meaning of object pooling?What are the differences between ADO.NET and classic ADO?Explain the architecture of ADO.NET.?What is a Connection String in ADO.NET C#??How do you establish a database connection using ADO.NET?Explain the concept of Connection Pooling in ADO.NET C#.Differentiate between Object pooling and Connection pooling in C#?What is a DataReader in ADO.NET? Explain with C# example?What is the functionality of CommandBehavior.SchemaOnly?Why CommandBehavior.SingleResult flag is used in ADO.NET?What does CommandBehavior.SingleRow do in ADO.NET?How we can get multiple results by DataReader using same connection in C#?How can we force the connection object to close after my DataReader is closed?What is a DataSet in ADO.NET? Explain with C# example?What are typed and un-typed datasets in ADO.NET C#?Write down some of the characteristic of DataSet?What is the difference between dataSet and DataReader?Why is DataSet Slower than DataReader? Explain with Example.How does DataSet handle data in a disconnected environment?What is the Difference between connected and disconnected architectire?Explain HasChanges() method of DataSet in C#.Explain GetChanges() method with detaild C# Example.Explain RejectChanges() method with C# Example.Explain AcceptChanges() method with C# Example.What are the various methods provided by DataSet for XML in C#?What is the purpose of DataAdapter in ADO.NET?Explain the steps involved in retrieving data using DataAdapter.
Previous
Next

Using CommandBehavior.CloseConnection in ADO.NET with C#

In C#, CommandBehavior.CloseConnection is an important option used with a DataReader in ADO.NET. It ensures that when the DataReader is closed, it also automatically closes the associated database connection, preventing resource leaks and simplifying code.

The main purpose of CommandBehavior.CloseConnection is to simplify the code and ensure that you don't accidentally forget to close the database connection after you've finished using the DataReader. This behavior helps in maintaining clean and efficient database connections.

Illustration with Complete Source Code

Let's illustrate how to use CommandBehavior.CloseConnection with a complete C# source code example:


using System;
using System.Data;
using System.Data.SqlClient;

class Program
{
    static void Main()
    {
        string connectionString = "Server=myServerAddress;Database=myDataBase;User Id=myUsername;Password=myPassword;";
        SqlConnection connection = new SqlConnection(connectionString);

        try
        {
            // Open the connection
            connection.Open();
            Console.WriteLine("Connection opened successfully");

            // Create a SQL command
            SqlCommand command = new SqlCommand("SELECT * FROM YourTable", connection);

            // Execute the command with CommandBehavior.CloseConnection
            SqlDataReader reader = command.ExecuteReader(CommandBehavior.CloseConnection);

            // Read and display data
            while (reader.Read())
            {
                Console.WriteLine(reader[0].ToString() + ", " + reader[1].ToString());
            }

            // The connection is automatically closed when the reader is closed
            Console.WriteLine("Connection status after reader is closed: " + connection.State);
        }
        catch (Exception ex)
        {
            // Handle any exceptions
            Console.WriteLine("Error: " + ex.Message);
        }
    }
}

In this example:

  • We define the CommandBehavior.CloseConnection option when executing the DataReader. This tells the DataReader to close the associated database connection when it is closed.
  • After reading and displaying the data, we check the status of the connection using connection.State. You'll see that the connection status is now "Closed" because it was automatically closed when the DataReader was closed.

Expected Output

After executing the code, the output will demonstrate that the connection has been closed automatically when the DataReader is closed:


Connection opened successfully
Row1Column1, Row1Column2
Row2Column1, Row2Column2
...
Connection status after reader is closed: Closed

Using CommandBehavior.CloseConnection simplifies your code by ensuring proper resource management and reducing the risk of resource leaks in database operations.

Previous
Next