Need these two done within 2 hours. (TCO 5, 6, 9) Discuss the importance of implementing transactions in web applications. Describe the COMMIT, and ROLLBACK command. In the following SaveEmployee function below, add code to insert the first name, last name, and pay rate into the tblEmployee table. In the database the column names are: FirstName, LastName, PayRate. Also, write the code to commit the transaction. public static bool SaveEmployee(string Database, string FirstName, string LastName, string PayRate) { bool recordSaved; try { OleDbTransaction myTransaction = null; OleDbConnection conn = new OleDbConnection(“PROVIDER=Microsoft.ACE.OLEDB.12.0;” +”Data Source=” +Database); conn.Open(); OleDbCommand command = conn.CreateCommand(); string strSQL; myTransaction = conn.BeginTransaction(); command.Transaction = myTransaction; // Write the code below to insert the first name, last name, and pay rate into the tblEmployee table _____________________________________________________ // Add your comments here command.CommandType = CommandType.Text; command.CommandText = strSQL; // Add your comments here command.ExecuteNonQuery(); // Write the code below to commit the transaction _______________________________________________________ // Add your comments here conn.Close(); recordSaved = true; } catch (Exception ex) { myTransaction.Rollback(); recordSaved = false; } return recordSaved; } 12pt Paragraph p (TCO 8, 9) Explain Secure Sockets Layer, authentication, and authorization. Discuss advantages of using validation controls and discuss the RequiredFieldValidator and the RegularExpressionValidator in particular. 12pt Paragraph

The implementation of transactions in web applications is crucial for managing data integrity and ensuring the consistency of database operations. Transactions allow multiple database operations to be treated as a single unit of work, ensuring that either all the operations are successfully completed or none of them are applied.

The COMMIT command is used to permanently save any changes made during a transaction. When the COMMIT command is issued, the changes are written to the database, making them permanent and visible to other users. This command essentially marks the successful completion of the transaction.

On the other hand, the ROLLBACK command is used to undo any changes made within a transaction and restore the data to its original state. If any error occurs during the transaction or if it fails to meet certain conditions, the ROLLBACK command can be used to discard all the changes made since the start of the transaction, ensuring that the database remains unaffected.

In the given SaveEmployee function, the task is to insert the first name, last name, and pay rate into the tblEmployee table. To achieve this, the code can be added as follows:

string strSQL = “INSERT INTO tblEmployee (FirstName, LastName, PayRate) VALUES (‘” + FirstName + “‘, ‘” + LastName + “‘, ‘” + PayRate + “‘)”;

The above code creates an SQL statement to perform an INSERT operation on the tblEmployee table, with the specified values for FirstName, LastName, and PayRate.

To commit the transaction and make the changes permanent, the following code can be added:

myTransaction.Commit();

The above line of code instructs the transaction to be committed, ensuring that the changes made within the transaction are saved to the database.

Overall, the implementation of transactions in web applications is vital for maintaining data integrity, and the COMMIT and ROLLBACK commands play a significant role in managing the success or failure of these transactions.

Secure Sockets Layer (SSL) is a cryptographic protocol that provides secure communication over a computer network. It ensures that data transmitted between two parties remains confidential and cannot be tampered with during transmission. SSL uses encryption and digital certificates to authenticate the identity of the communicating parties and establish a secure channel.

Authentication is the process of verifying the identity of a user or entity. In web applications, authentication helps ensure that only authorized users are granted access to the system. This can be achieved through mechanisms such as passwords, biometrics, or digital certificates.

Authorization, on the other hand, determines what actions and resources a user is allowed to access within a system. It involves assigning specific permissions or privileges to users based on their roles or responsibilities. Authorization helps enforce security policies and restricts unauthorized access to sensitive information or functionalities.

Validation controls in web applications play a crucial role in ensuring that user input is valid and meets certain criteria. The RequiredFieldValidator is used to ensure that a particular field in a form is not left blank or empty before submitting the form. It can be used to prevent incomplete or missing information.

The RegularExpressionValidator, on the other hand, allows developers to define a regular expression pattern that user input must match. This is useful for enforcing specific formats or validation rules for fields such as email addresses, phone numbers, or passwords. The RegularExpressionValidator helps maintain data integrity by ensuring that the input adheres to specified criteria.

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