Adressbook windows forms C#

Creating an address book application in Windows Forms using C# involves several steps. Below, I'll guide you through the process of creating a basic address book application that allows you to add, delete, and search for users.

Step 1: Set Up Your Windows Forms Project

1. Open Visual Studio.
2. Create a new Windows Forms Application project.

Step 2: Design Your Form

Design your form by adding the necessary controls (e.g., labels, textboxes, buttons, and a DataGridView). Your form might look something like this:

Label: First Name
TextBox: [First Name]

Label: Last Name
TextBox: [Last Name]

Button: Add
Button: Delete
Button: Search

DataGridView (to display the address book data)

Step 3: Create a User Class

You should create a class to represent a user's information. This class should have properties for First Name, Last Name, and any other relevant information.

public class User
{
    public string FirstName { get; set; }
    public string LastName { get; set; }
    // Add other properties like Address, Phone Number, etc., if needed.
}

Step 4: Create a List to Store Users

In your form's code-behind, create a list to store the user data.

List addressBook = new List();

Step 5: Implement Adding Users

When the "Add" button is clicked, you can create a new User object and add it to your list.

private void AddButton_Click(object sender, EventArgs e)
{
    string firstName = FirstNameTextBox.Text;
    string lastName = LastNameTextBox.Text;

    User newUser = new User
    {
        FirstName = firstName,
        LastName = lastName
    };

    addressBook.Add(newUser);

    // Refresh the DataGridView to display the updated data.
    RefreshDataGridView();
}

Step 6: Implement Deleting Users

When the "Delete" button is clicked, you can remove a user from the list based on the selected user in the DataGridView.

private void DeleteButton_Click(object sender, EventArgs e)
{
    if (dataGridView.SelectedRows.Count > 0)
    {
        int selectedIndex = dataGridView.SelectedRows[0].Index;
        addressBook.RemoveAt(selectedIndex);

        // Refresh the DataGridView to display the updated data.
        RefreshDataGridView();
    }
}

Step 7: Implement Searching Users

When the "Search" button is clicked, you can search for users based on their first name or last name and display the results in the DataGridView.

private void SearchButton_Click(object sender, EventArgs e)
{
    string searchQuery = SearchTextBox.Text.ToLower();

    List searchResults = addressBook
        .Where(user => user.FirstName.ToLower().Contains(searchQuery) || user.LastName.ToLower().Contains(searchQuery))
        .ToList();

    dataGridView.DataSource = searchResults;
}

Step 8: Implement DataGridView Refresh Method

Create a method to refresh the DataGridView with the latest data from your address book list.

private void RefreshDataGridView()
{
    dataGridView.DataSource = null;
    dataGridView.DataSource = addressBook;
}

Step 9: Wiring up Events

Don't forget to wire up the event handlers for your buttons (Add, Delete, Search) in the Form Designer or code-behind to make them functional.

Step 10: Test Your Application

Build and run your application to test the functionality.