The objective of this project is to develop a family budget system using Visual Basic (VB) that integrates with a SQL database. This system will allow users to input and track their expenses and savings related to typical household items such as bills, food, and other necessities. The application will provide functionalities to calculate total spendings and savings, offering a clear overview of the family’s financial health.
Imports System.Data.SqlClient
Public Class BudgetSystem
Private connectionString As String = "Data Source=your_server;Initial Catalog=your_database;Integrated Security=True"
' Method to add an expense
Public Sub AddExpense(itemName As String, amount As Decimal, category As String)
Using connection As New SqlConnection(connectionString)
Dim command As New SqlCommand("INSERT INTO Expenses (ItemName, Amount, Category) VALUES (@ItemName, @Amount, @Category)", connection)
command.Parameters.AddWithValue("@ItemName", itemName)
command.Parameters.AddWithValue("@Amount", amount)
command.Parameters.AddWithValue("@Category", category)
connection.Open()
command.ExecuteNonQuery()
End Using
End Sub
' Method to calculate total expenses
Public Function CalculateTotalExpenses() As Decimal
Dim total As Decimal = 0
Using connection As New SqlConnection(connectionString)
Dim command As New SqlCommand("SELECT SUM(Amount) FROM Expenses", connection)
connection.Open()
Dim result = command.ExecuteScalar()
If result IsNot DBNull.Value Then
total = Convert.ToDecimal(result)
End If
End Using
Return total
End Function
' Method to calculate savings
Public Function CalculateSavings(income As Decimal) As Decimal
Dim totalExpenses As Decimal = CalculateTotalExpenses()
Return income - totalExpenses
End Function
End Class
Code Explanation
The provided code defines a simple family budget system in Visual Basic that interacts with a SQL database to manage household expenses. Here’s a breakdown of the key components:
- Imports and Connection String:
- The
System.Data.SqlClient
namespace is imported to facilitate SQL database operations. - A connection string is defined to connect to the SQL database. Ensure to replace
your_server
andyour_database
with actual values.
- The
- AddExpense Method:
- This method allows users to add an expense to the database. It takes three parameters:
itemName
,amount
, andcategory
. - A SQL command is prepared to insert the expense into the
Expenses
table. Parameters are used to prevent SQL injection attacks. - The connection is opened, and the command is executed to insert the data.
- This method allows users to add an expense to the database. It takes three parameters:
- CalculateTotalExpenses Method:
- This function calculates the total expenses by summing the
Amount
column in theExpenses
table. - It returns the total as a decimal value. If there are no expenses recorded, it returns zero.
- This function calculates the total expenses by summing the
- CalculateSavings Method:
- This method calculates the savings by subtracting the total expenses from the provided income.
- It calls the
CalculateTotalExpenses
method to get the current total expenses.
This budget system provides a foundational structure for managing household finances, allowing users to track their spending and savings effectively. By integrating SQL, it ensures that data is stored persistently and can be accessed easily for future calculations.
Happy coding… 🙂
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