Generate a Visual Basic 6.0 booking hotel program and generate MS Access 2000 - 2003 (BookingHotel.mdb)
"You are a highly skilled computer scientist with extensive experience in Visual Basic 6.0 (VB6) and MS Access database development. You possess a deep understanding of database design, user interface programming, and event-driven logic. Your task is to create a fully functional hotel booking application based on a form (image to be provided separately). The application should allow users to book available rooms, validate input data, calculate the total price, and update the database accordingly. Your response should include the complete VB6 code, the necessary MS Access database structure (BookingHotel.mdb), and a detailed explanation of the program's logic, including error handling and data validation. Adhere strictly to the provided property names and functionalities. Here's the structure you should follow: --- ## 1. Database Design (BookingHotel.mdb) ### Tables: * **Kamar (Rooms):** * `NoKamar` (Text(4), Primary Key): Room Number (e.g., A001, B002). Limit to 4 characters. * `TipeKamar` (Text(10)): Room Type (Single, Double, VIP). Limit to 10 characters. * `HargaKamar` (Currency): Price per night for the room. * `Status` (Boolean): Availability (True = Available, False = Booked). * **Booking (Bookings):** * `BookingID` (AutoNumber, Primary Key): Unique booking identifier. * `NamaTamu` (Text(50)): Guest Name. Limit to 50 characters. * `NoHP` (Text(20)): Guest Phone Number. Limit to 20 characters. * `NoKamar` (Text(4)): Room Number (Foreign Key referencing Kamar.NoKamar). * `TipeKamar` (Text(10)): Room Type. * `TglCheckIn` (DateTime): Check-In Date and Time. * `TglCheckOut` (DateTime): Check-Out Date and Time. * `TotalHarga` (Currency): Total Price of the booking. ### Relationships: * One-to-many relationship between `Kamar` and `Booking` tables, linked by `NoKamar`. Enforce referential integrity. ## 2. Visual Basic 6.0 Code ```vb ' **General Declarations (at the top of the form - Form1)** Option Explicit ' Database Connection Variables Dim cn As ADODB.Connection Dim rs As ADODB.Recordset ' Function to connect to the database Private Function ConnectToDatabase() As Boolean ' Code to establish connection to BookingHotel.mdb ' Return True if successful, False otherwise End Function ' Function to disconnect from the database Private Sub DisconnectFromDatabase() ' Code to close the connection and recordset End Sub ' **Code for Frame 1 (Data Kamar yang Tersedia)** ' (This section will primarily handle displaying data in DataGrid1) ' **Code for Frame 2 (Form Pengisian Data Tamu)** ' (This section will handle user input and data validation) ' **Code for DataGrid1 (Displaying Available Rooms)** ' (This section will handle displaying available rooms based on database data) ' **Code for Text1 (Nama Tamu - Guest Name)** Private Sub Text1_LostFocus() ' Validation logic for Nama Tamu (only string, error message) End Sub ' **Code for Text2 (No HP - Phone Number)** Private Sub Text2_LostFocus() ' Validation logic for No HP (only number, error message) End Sub ' **Code for Combo1 (No Kamar - Room Number)** Private Sub Combo1_Click() ' Logic to populate Combo1 with available room numbers from the database End Sub ' **Code for Combo2 (Tipe Kamar - Room Type)** Private Sub Combo2_Click() ' Logic to populate Combo2 with room types (Single, Double, VIP) End Sub ' **Code for DTPicker1 (Tgl Check-In - Check-In Date)** ' (No specific code needed here, DTPicker handles date selection) ' **Code for DTPicker2 (Tgl Check-Out - Check-Out Date)** ' (No specific code needed here, DTPicker handles date selection) ' **Code for Combo3 (Jam Check-In - Check-In Hour)** ' (Populate with hours 00:00 - 23:00) ' **Code for Combo4 (Jam Check-Out - Check-Out Hour)** ' (Populate with hours 00:00 - 23:00) ' **Code for Command1 (Pesan - Book)** Private Sub Command1_Click() ' Booking logic: validation, confirmation, price calculation, database update End Sub ' **Code for Command2 (Batal - Cancel)** Private Sub Command2_Click() ' Reset all data in Frame 2 End Sub ' **Code for Command3 (Keluar - Exit)** Private Sub Command3_Click() ' Exit the application End Sub ' **Error Handling and Data Validation Subroutines** ' (Separate subroutines for validating each input field) ' **Database Connection Subroutines** ' (Separate subroutines for connecting and disconnecting from the database) ' **Other Necessary Subroutines and Functions** ' (e.g., function to calculate total price) ``` (Provide the complete VB6 code here, including comments explaining each section. Make sure to include code for connecting to the database, populating the DataGrid and Combo boxes, handling user input, validating data, calculating the total price, updating the database, and displaying appropriate messages. Remember to use the specified property names.) ## 3. Code Explanation ### 3.1. Database Connection (Explain how the VB6 code connects to the MS Access database using ADODB. Include the connection string and error handling.) ### 3.2. DataGrid Population (Explain how the DataGrid is populated with data from the `Kamar` table, showing available rooms. Include the SQL query used.) ### 3.3. User Input and Validation (Frame 2) * **Nama Tamu (Guest Name):** (Explain the validation logic for the Guest Name field, including the error message and the code used to implement it. Use `IsNumeric` and `Trim` functions.) * **No HP (Phone Number):** (Explain the validation logic for the Phone Number field, including the error message and the code used to implement it. Use `IsNumeric` and `Len` functions.) * **No Kamar (Room Number):** (Explain how the available room numbers are populated in the Combo Box from the database. Include the SQL query used.) * **Tipe Kamar (Room Type):** (Explain how the room types are populated in the Combo Box. This can be hardcoded or read from a separate table.) * **Tgl Check-In (Check-In Date):** (Explain how the DTPicker is used to select the check-in date and how the selected date is retrieved.) * **Jam Check-In (Check-In Hour):** (Explain how the Combo3 is populated with hours and how the selected hour is retrieved.) * **Tgl Check-Out (Check-Out Date):** (Explain how the DTPicker is used to select the check-out date and how the selected date is retrieved.) * **Jam Check-Out (Check-Out Hour):** (Explain how the Combo4 is populated with hours and how the selected hour is retrieved.) ### 3.4. Booking Logic (Explain the complete booking logic, including: * Retrieving data from the form. * Calculating the total price: `((Harga no kamar + Harga tipe kamar) + (Harga no kamar + Harga tipe kamar) * 0.12)`. Explain how `Harga no kamar` is retrieved from the `Kamar` table based on the selected `NoKamar` and how a price is assigned to each `TipeKamar`. * Displaying the confirmation message. * Updating the `Kamar` table (setting `Status` to False for the booked room). * Adding a new record to the `Booking` table. * Error handling for database operations.) ### 3.5. Error Handling (Explain the error handling mechanisms implemented in the code, including: * Database connection errors. * Data validation errors. * Booking errors (e.g., room already booked). * Use `On Error GoTo` statements.) ## 4. Assumptions (List any assumptions made during the development of the program, such as: * The existence of the BookingHotel.mdb file in a specific location (e.g., "C:\"). * The ADODB library is properly referenced in the VB6 project. * The DTPicker control is properly installed and registered.) --- **Important:** I will provide the image of the form separately. Based on that form, please generate the complete VB6 code, the MS Access database structure, and the detailed explanation as outlined above. Pay close attention to the data validation requirements, error handling, and the specific calculation formula. The goal is to create a functional and robust hotel booking application that adheres to all the given specifications."
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