Import & Database Verbindung vollendet - Anfang vom Export

Projekt_Calcan_Conze/.vs/Projekt_Calcan_Conze/v17/DocumentLayout.json

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@@ -134,11 +136,12 @@
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@@ -158,7 +162,8 @@
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Projekt_Calcan_Conze/Projekt_Calcan_Conze/Constants.cs

@@ -5,6 +5,7 @@ internal static class Constants
     public const char Separator = ';';
     public const string FemaleAttributeIdentifier = "Frau";
     public const string MaleAttributeIdentifier = "Herr";
+    public const string DiverseAttributeIdentifier = "Divers";
     public const string AddressAttributeIdentifier = "Adresse";
     public const string EmailAttributeIdentifier = "E-Mail";
     public const string PhoneNumberAttributeIdentifier = "Telefon";

Projekt_Calcan_Conze/Projekt_Calcan_Conze/DTOs/CustomerAttributeDto.cs

@@ -1,11 +0,0 @@
-namespace Projekt_Calcan_Conze.DTOs;
-
-internal class CustomerAttributeDto
-{
-    public CustomerAttributeDto(List<string> parts)
-    {
-        this.Parts = parts;
-    }
-
-    public List<string> Parts { get; }
-}

Projekt_Calcan_Conze/Projekt_Calcan_Conze/DTOs/CustomerDto.cs

@@ -1,13 +0,0 @@
-namespace Projekt_Calcan_Conze.DTOs;
-
-using Projekt_Calcan_Conze.DTOs;
-
-internal class CustomerDto
-{
-    public CustomerDto(List<CustomerAttributeDto> attributes)
-    {
-        this.Attributes = attributes;
-    }
-
-    public List<CustomerAttributeDto> Attributes { get; }
-}

Projekt_Calcan_Conze/Projekt_Calcan_Conze/DTOs/UserAttributeDto.cs

@@ -0,0 +1,14 @@
+namespace Projekt_Calcan_Conze.DTOs;
+
+internal class UserAttributeDto
+{
+    public UserAttributeDto(List<string> parts, string originalCsvLine)
+    {
+        this.Parts = parts;
+        this.OriginalCsvLine = originalCsvLine;
+    }
+
+    public List<string> Parts { get; }
+
+    public string OriginalCsvLine { get; }
+}

Projekt_Calcan_Conze/Projekt_Calcan_Conze/DTOs/UserDto.cs

@@ -0,0 +1,11 @@
+namespace Projekt_Calcan_Conze.DTOs;
+
+internal class UserDto
+{
+    public UserDto(List<UserAttributeDto> attributes)
+    {
+        this.Attributes = attributes;
+    }
+
+    public List<UserAttributeDto> Attributes { get; }
+}

Projekt_Calcan_Conze/Projekt_Calcan_Conze/DTOs/UserIdentifierDto.cs

@@ -0,0 +1,17 @@
+namespace Projekt_Calcan_Conze.DTOs;
+
+internal class UserIdentifierDto
+{
+    public UserIdentifierDto(string title, string firstName, string lastName)
+    {
+        this.Title = title;
+        this.FirstName = firstName;
+        this.LastName = lastName;
+    }
+
+    public string Title { get; }
+
+    public string FirstName { get; }
+
+    public string LastName { get; }
+}

Projekt_Calcan_Conze/Projekt_Calcan_Conze/ImportUsers.cs

@@ -1,25 +1,24 @@
-namespace Projekt_Calcan_Conze;
+using System.Net.Mail;
-
-using System.Net.Mail;
 
 using Projekt_Calcan_Conze.DTOs;
 using Projekt_Calcan_Conze.Models;
-using Microsoft.VisualBasic;
+using Projekt_Calcan_Conze.Models;
 
-internal static class Import
+namespace Projekt_Calcan_Conze;
+
+internal static class ImportUsers
 {
-    public static (List<Customer> Customers, List<string> Protocol) For(string filePath)
+    public static (List<User> User, List<string> Protocol) FromCsv(string filePath)
     {
-        var (customerDtos, protocol) = Import.ReadCustomerDtos(filePath);
+        var (userDtos, protocol) = ReadUserDtos(filePath);
-        var customers = Import.ParseCustomers(customerDtos, protocol);
+        var users = ParseUsers(userDtos, protocol);
-        return (customers, protocol);
+        return (users, protocol);
     }
 
-    private static (List<CustomerDto> CustomerDtos, List<string> Protocol) ReadCustomerDtos(
+    private static (List<UserDto> UserDtos, List<string> Protocol) ReadUserDtos(string filePath)
-        string filePath)
     {
         List<string> protocol = [];
-        List<CustomerDto> customerDtos = [];
+        List<UserDto> userDtos = [];
         List<string> lines;
 
         try
@@ -32,10 +31,10 @@ internal static class Import
         catch (Exception)
         {
             Console.WriteLine("The file does not exist or is currently used by another program.");
-            return (customerDtos, protocol);
+            return (userDtos, protocol);
         }
 
-        CustomerDto? currentCustomer = null;
+        UserDto? currentUser = null;
 
         foreach (string line in lines)
         {
@@ -47,18 +46,21 @@ internal static class Import
 
             string title = lineParts[0];
 
-            if (title is Constants.FemaleAttributeIdentifier or Constants.MaleAttributeIdentifier)
+            if (title
+                is Constants.FemaleAttributeIdentifier
+                or Constants.MaleAttributeIdentifier
+                or Constants.DiverseAttributeIdentifier)
             {
-                if (currentCustomer is not null)
+                if (currentUser is not null)
                 {
-                    customerDtos.Add(currentCustomer);
+                    userDtos.Add(currentUser);
                 }
 
-                currentCustomer = new CustomerDto([new CustomerAttributeDto(lineParts)]);
+                currentUser = new UserDto([new UserAttributeDto(lineParts, line)]);
             }
-            else if (currentCustomer is not null)
+            else if (currentUser is not null)
             {
-                currentCustomer.Attributes.Add(new CustomerAttributeDto(lineParts));
+                currentUser.Attributes.Add(new UserAttributeDto(lineParts, line));
             }
             else
             {
@@ -66,39 +68,38 @@ internal static class Import
             }
         }
 
-        if (currentCustomer is not null)
+        if (currentUser is not null)
         {
-            customerDtos.Add(currentCustomer);
+            userDtos.Add(currentUser);
         }
 
-        return (customerDtos, protocol);
+        return (userDtos, protocol);
     }
 
-    private static List<Customer> ParseCustomers(List<CustomerDto> customerDtos,
+    private static List<User> ParseUsers(List<UserDto> userDtos, List<string> protocol)
-                                                 List<string> protocol)
     {
-        List<Customer> customers = [];
+        List<User> users = [];
 
-        foreach (CustomerDto customerDto in customerDtos)
+        foreach (var userDto in userDtos)
         {
-            Customer? customer = Import.ParseCustomer(customerDto);
+            var user = ParseUser(userDto);
 
-            if (customer is not null)
+            if (user is not null)
             {
-                customers.Add(customer);
+                users.Add(user);
             }
             else
             {
-                Import.LogInvalidCustomer(protocol, customerDto);
+                protocol.AddRange(userDto.Attributes.Select(attribute => attribute.OriginalCsvLine));
             }
         }
 
-        return customers;
+        return users;
     }
 
-    private static Customer? ParseCustomer(CustomerDto customer)
+    private static User? ParseUser(UserDto user)
     {
-        CustomerAttributeDto firstAttribute = customer.Attributes[0];
+        var firstAttribute = user.Attributes[0];
 
         if (firstAttribute.Parts.Count != 4)
         {
@@ -111,7 +112,7 @@ internal static class Import
 
         DateOnly? dateOfBirth =
             DateOnly.TryParseExact(firstAttribute.Parts[3], Constants.DateOfBirthFormat,
-                                   out DateOnly date)
+                                   out var date)
                 ? date
                 : null;
 
@@ -124,7 +125,7 @@ internal static class Import
         Address? address = null;
         List<PhoneNumber> phoneNumbers = [];
 
-        foreach (CustomerAttributeDto attribute in customer.Attributes.Skip(1))
+        foreach (var attribute in user.Attributes.Skip(1))
         {
             var attributeParts = attribute.Parts;
             string identifier = attributeParts[0];
@@ -185,6 +186,10 @@ internal static class Import
                         {
                             phoneNumbers.Add(new PhoneNumber(areaCode, number));
                         }
+                        else
+                        {
+                            return null;
+                        }
                     }
                     else
                     {
@@ -197,7 +202,7 @@ internal static class Import
             }
         }
 
-        return new Customer(
+        return new User(
             title: title,
             firstName: fistName,
             lastName: lastName,
@@ -206,12 +211,4 @@ internal static class Import
             address: address,
             phoneNumbers: phoneNumbers);
     }
-
-    private static void LogInvalidCustomer(List<string> protocol, CustomerDto customerDto)
-    {
-        protocol.AddRange(
-            customerDto
-                .Attributes
-                .Select(attribute => string.Join(Constants.Separator, attribute.Parts)));
-    }
 }

Projekt_Calcan_Conze/Projekt_Calcan_Conze/Models/User.cs

@@ -1,11 +1,10 @@
-namespace Projekt_Calcan_Conze.Models;
+using System.Text;
 
-using Projekt_Calcan_Conze.Models;
+namespace Projekt_Calcan_Conze.Models;
-using System.Text;
 
-internal class Customer
+internal class User
 {
-    public Customer(
+    public User(
         string title,
         string firstName,
         string lastName,
@@ -59,6 +58,56 @@ internal class Customer
         {
             builder.Append($"{Constants.Separator} {phoneNumber.AreaCode} {phoneNumber.Number}");
         }
+
         return builder.ToString();
     }
+
+    public IEnumerable<string> ToCsv()
+    {
+        List<string> csvLines =
+        [
+            this.Title
+            + Constants.Separator
+            + this.FirstName
+            + Constants.Separator
+            + this.LastName
+            + Constants.Separator
+            + this.DateOfBirth.ToString("dd.MM.yyyy")
+        ];
+
+        if (this.Address is not null)
+        {
+            csvLines.Add(
+                Constants.AddressAttributeIdentifier
+                + Constants.Separator
+                + this.Address.StreetAndHouseNumber
+                + Constants.Separator
+                + this.Address.PostalCode
+                + Constants.Separator
+                + this.Address.City);
+        }
+
+        if (this.Email is not null)
+        {
+            csvLines.Add(
+                Constants.EmailAttributeIdentifier
+                + Constants.Separator
+                + this.Email
+                + Constants.Separator
+                + Constants.Separator);
+        }
+
+        csvLines.AddRange(
+            this.PhoneNumbers
+                .Select(
+                    phoneNumber =>
+                        Constants.PhoneNumberAttributeIdentifier
+                        + Constants.Separator
+                        + phoneNumber.AreaCode
+                        + Constants.Separator
+                        + phoneNumber.Number
+                        + Constants.Separator));
+
+        return csvLines;
+    }
 }

Projekt_Calcan_Conze/Projekt_Calcan_Conze/Program.cs

@@ -0,0 +1,76 @@
+using Projekt_Calcan_Conze;
+using Projekt_Calcan_Conze.Repositories;
+
+try
+{
+    string? filePath = null;
+
+    while (string.IsNullOrEmpty(filePath))
+    {
+        Console.WriteLine("Bitte gib einen Dateipfad an:");
+        filePath = Console.ReadLine();
+
+        if (filePath?.StartsWith('\"') ?? false)
+        {
+            filePath = filePath.Substring(startIndex: 1, length: filePath.Length - 1);
+        }
+
+        if (filePath?.EndsWith('\"') ?? false)
+        {
+            filePath = filePath.Substring(startIndex: 0, length: filePath.Length - 1);
+        }
+
+        if (!File.Exists(filePath))
+        {
+            Console.WriteLine("Die Datei existiert nicht.");
+            filePath = null;
+        }
+    }
+
+    string? clientNumber = null;
+
+    while (string.IsNullOrEmpty(clientNumber))
+    {
+        Console.WriteLine("Bitte gib eine Kundennummer an:");
+        clientNumber = Console.ReadLine();
+    }
+
+    var (users, protocol) = ImportUsers.FromCsv(filePath);
+    var existingUsers = await Database.GetUserIdentifiers(clientNumber);
+
+    var duplicateUsers =
+        users.Where(
+                user =>
+                    existingUsers.Any(
+                        existingUser =>
+                            existingUser.FirstName == user.FirstName
+                            && existingUser.LastName == user.LastName
+                            && existingUser.Title == user.Title))
+            .ToList();
+
+    foreach (var duplicateUser in duplicateUsers)
+    {
+        protocol.AddRange(duplicateUser.ToCsv());
+    }
+
+    var usersToCreate = users.Except(duplicateUsers).ToList();
+    await Database.CreateUsers(usersToCreate, clientNumber);
+
+    if (protocol.Any())
+    {
+        string protocolFilePath =
+            Path.Combine(
+                Path.GetDirectoryName(filePath),
+                Path.GetFileNameWithoutExtension(filePath) + "_protocol.csv");
+        await File.WriteAllLinesAsync(protocolFilePath, protocol);
+        Console.WriteLine($"Protokoll wurde unter \"{protocolFilePath}\" gespeichert.");
+    }
+    else
+    {
+        Console.WriteLine("Alle Nutzer wurden erfolgreich importiert.");
+    }
+}
+catch (Exception ex)
+{
+    Console.WriteLine($"Ein Fehler ist aufgetreten: {ex.Message}");
+}

Projekt_Calcan_Conze/Projekt_Calcan_Conze/Programm.cs

@@ -1,46 +0,0 @@
-using Projekt_Calcan_Conze;
-using Projekt_Calcan_Conze.Models;
-
-string? filePath = null;
-
-while (string.IsNullOrEmpty(filePath))
-{
-    Console.WriteLine("Bitte gib einen Dateipfad an:");
-    filePath = Console.ReadLine();
-}
-
-if (filePath.StartsWith('\"'))
-{
-    filePath = filePath.Substring(startIndex: 1, length: filePath.Length - 1);
-}
-
-if (filePath.EndsWith('\"'))
-{
-    filePath = filePath.Substring(startIndex: 0, length: filePath.Length - 1);
-}
-
-string? customerId = null;
-
-while (customerId is null)
-{
-    Console.WriteLine("Bitte gib eine Kundennummer an:");
-    customerId = Console.ReadLine();
-}
-
-var (customers, protocol) = Import.For(filePath);
-
-Console.WriteLine();
-Console.WriteLine("Importierte Kunden:");
-
-foreach (Customer customer in customers)
-{
-    Console.WriteLine(customer.ToString());
-}
-
-Console.WriteLine();
-Console.WriteLine("Ungültige nicht importierte Zeilen/Kunden:");
-
-foreach (string protocolLine in protocol)
-{
-    Console.WriteLine(protocolLine);
-}

Projekt_Calcan_Conze/Projekt_Calcan_Conze/Repository/Database.cs

@@ -0,0 +1,296 @@
+using System.Data;
+
+using Projekt_Calcan_Conze.DTOs;
+using Projekt_Calcan_Conze.Models;
+
+namespace Projekt_Calcan_Conze.Repositories;
+
+using MySql.Data.MySqlClient;
+
+internal static class Database
+{
+    //set the correct values for your server, user, password and database name
+    private const string ConnectionString = "server=localhost;uid=root;pwd=root;database=import_export";
+
+    public static async Task<List<UserIdentifierDto>> GetUserIdentifiers(string clientNumber)
+    {
+        var users = new List<UserIdentifierDto>();
+
+        try
+        {
+            // use "using" to automatically close the connection when done
+            await using var dbConnection = new MySqlConnection(ConnectionString);
+
+            // open a connection
+            await dbConnection.OpenAsync();
+
+            var usersCommand =
+                new MySqlCommand
+                {
+                    Connection = dbConnection,
+                    CommandText =
+                        $"""
+                         SELECT *
+                         FROM user
+                         INNER JOIN client ON user.clientId = client.id
+                         INNER JOIN gender ON user.genderId = gender.id
+                         WHERE client.clientno = @{nameof(clientNumber)}
+                         """
+                };
+            usersCommand.Parameters.AddWithValue($"@{nameof(clientNumber)}", clientNumber);
+
+            // execute the command and read the results
+            await using var sqlReader = await usersCommand.ExecuteReaderAsync();
+
+            while (await sqlReader.ReadAsync())
+            {
+                string title = sqlReader.GetString("description");
+                string firstName = sqlReader.GetString("firstname");
+                string lastName = sqlReader.GetString("lastname");
+
+                users.Add(
+                    new UserIdentifierDto(
+                        title: title,
+                        firstName: firstName,
+                        lastName: lastName));
+            }
+        }
+        catch (Exception ex)
+        {
+            Console.WriteLine("An error occurred while reading the database: " + ex.Message);
+        }
+
+        return users;
+    }
+
+    public static async Task CreateUsers(List<User> usersToCreate, string clientNumber)
+    {
+        try
+        {
+            await using var dbConnection = new MySqlConnection(ConnectionString);
+            await dbConnection.OpenAsync();
+            var transaction = await dbConnection.BeginTransactionAsync();
+
+            try
+            {
+                var getClientIdCommand =
+                    new MySqlCommand
+                    {
+                        Connection = dbConnection,
+                        Transaction = transaction,
+                        CommandText = "SELECT id FROM client WHERE clientno = @clientno"
+                    };
+                getClientIdCommand.Parameters.AddWithValue("@clientno", clientNumber);
+                object? clientIdResult = await getClientIdCommand.ExecuteScalarAsync();
+                long clientId;
+
+                if (clientIdResult is int cId)
+                {
+                    clientId = cId;
+                }
+                else
+                {
+                    throw new Exception("Client not found");
+                }
+
+                foreach (var user in usersToCreate)
+                {
+                    var getGenderCommand =
+                        new MySqlCommand
+                        {
+                            Connection = dbConnection,
+                            Transaction = transaction,
+                            CommandText = "SELECT id FROM gender WHERE gender.description = @title "
+                        };
+                    getGenderCommand.Parameters.AddWithValue("@title", user.Title);
+
+                    await using var genderReader = await getGenderCommand.ExecuteReaderAsync();
+
+                    long genderId;
+
+                    if (await genderReader.ReadAsync())
+                    {
+                        genderId = genderReader.GetByte("id");
+                        await genderReader.CloseAsync();
+                    }
+                    else
+                    {
+                        await genderReader.CloseAsync();
+                        genderId =
+                            await GetNextIdForTable(
+                                table: "gender",
+                                idColumn: "id",
+                                idType: typeof(byte),
+                                dbConnection,
+                                transaction);
+
+                        var insertGenderCommand =
+                            new MySqlCommand
+                            {
+                                Connection = dbConnection,
+                                Transaction = transaction,
+                                CommandText =
+                                     """
+                                     INSERT INTO gender (id, description)
+                                     VALUES (@id, @title) 
+                                     """
+                            };
+                        insertGenderCommand.Parameters.AddWithValue("@id", genderId);
+                        insertGenderCommand.Parameters.AddWithValue("@title", user.Title);
+                        insertGenderCommand.ExecuteNonQuery();
+                    }
+
+                    long userId =
+                        await GetNextIdForTable(
+                            table: "user",
+                            idColumn: "id",
+                            idType: typeof(int),
+                            dbConnection,
+                            transaction);
+                    var userCommand =
+                        new MySqlCommand
+                        {
+                            Connection = dbConnection,
+                            Transaction = transaction,
+                            CommandText =
+                                 """
+                                 INSERT INTO user (id, clientId, genderId, firstname, lastname, birthdate)
+                                 VALUES (@id, @clientId, @genderId, @firstname, @lastname, @dateofbirth)
+                                 """
+                        };
+                    userCommand.Parameters.AddWithValue("@id", userId);
+                    userCommand.Parameters.AddWithValue("@clientId", clientId);
+                    userCommand.Parameters.AddWithValue("@genderId", genderId);
+                    userCommand.Parameters.AddWithValue("@firstname", user.FirstName);
+                    userCommand.Parameters.AddWithValue("@lastname", user.LastName);
+                    userCommand.Parameters.AddWithValue("@dateofbirth", user.DateOfBirth.ToString("yyyy-MM-dd"));
+
+                    await userCommand.ExecuteNonQueryAsync();
+
+
+                    if (user.Email is not null)
+                    {
+                        long emailId =
+                            await GetNextIdForTable(
+                                table: "email",
+                                idColumn: "id",
+                                idType: typeof(int),
+                                dbConnection,
+                                transaction);
+                        var emailCommand =
+                            new MySqlCommand
+                            {
+                                Connection = dbConnection,
+                                Transaction = transaction,
+                                CommandText =
+                                     """
+                                     INSERT INTO email (id, userId, email)
+                                     VALUES (@id, @userId, @email)
+                                     """
+                            };
+                        emailCommand.Parameters.AddWithValue("@id", emailId);
+                        emailCommand.Parameters.AddWithValue("@userId", userId);
+                        emailCommand.Parameters.AddWithValue("@email", user.Email);
+
+                        await emailCommand.ExecuteNonQueryAsync();
+                    }
+
+                    if (user.Address is not null)
+                    {
+                        long addressId =
+                            await GetNextIdForTable(
+                                table: "address",
+                                idColumn: "id",
+                                idType: typeof(int),
+                                dbConnection,
+                                transaction);
+                        var addressCommand =
+                            new MySqlCommand
+                            {
+                                Connection = dbConnection,
+                                Transaction = transaction,
+                                CommandText =
+                                     """
+                                     INSERT INTO address (id, userId, street, postalcode, city)
+                                     VALUES (@id, @userId, @street, @postalcode, @city)
+                                     """
+                            };
+                        addressCommand.Parameters.AddWithValue("@id", addressId);
+                        addressCommand.Parameters.AddWithValue("@userId", userId);
+                        addressCommand.Parameters.AddWithValue("@street", user.Address.StreetAndHouseNumber);
+                        addressCommand.Parameters.AddWithValue("@postalcode", user.Address.PostalCode);
+                        addressCommand.Parameters.AddWithValue("@city", user.Address.City);
+
+                        await addressCommand.ExecuteNonQueryAsync();
+                    }
+
+                    foreach (var phoneNumber in user.PhoneNumbers)
+                    {
+                        long phoneId =
+                            await GetNextIdForTable(
+                                table: "phone",
+                                idColumn: "id",
+                                idType: typeof(int),
+                                dbConnection,
+                                transaction);
+                        var phoneNumberCommand =
+                            new MySqlCommand
+                            {
+                                Connection = dbConnection,
+                                Transaction = transaction,
+                                CommandText =
+                                     """
+                                     INSERT INTO phone (id, userId, phoneprefix, phonenumber)
+                                     VALUES (@id, @userId, @areacode, @number)
+                                     """
+                            };
+                        phoneNumberCommand.Parameters.AddWithValue("@id", phoneId);
+                        phoneNumberCommand.Parameters.AddWithValue("@userId", userId);
+                        phoneNumberCommand.Parameters.AddWithValue("@areacode", phoneNumber.AreaCode);
+                        phoneNumberCommand.Parameters.AddWithValue("@number", phoneNumber.Number);
+
+                        await phoneNumberCommand.ExecuteNonQueryAsync();
+                    }
+                }
+            }
+            catch (Exception)
+            {
+                await transaction.RollbackAsync();
+                throw;
+            }
+
+            await transaction.CommitAsync();
+        }
+        catch (Exception ex)
+        {
+            Console.WriteLine("An error occurred while writing to the database: " + ex.Message);
+        }
+    }
+
+    private static async Task<long> GetNextIdForTable(
+        string table,
+        string idColumn,
+        Type idType,
+        MySqlConnection connection,
+        MySqlTransaction transaction)
+    {
+        var getMaxIdCommand =
+            new MySqlCommand
+            {
+                Connection = connection,
+                Transaction = transaction,
+                CommandText = $"SELECT MAX({idColumn}) FROM {table}"
+            };
+        await using var maxIdReader = await getMaxIdCommand.ExecuteReaderAsync();
+        return await maxIdReader.ReadAsync()
+            ? idType switch
+            {
+                { } t when t == typeof(byte) => maxIdReader.GetByte(0) + 1,
+                { } t when t == typeof(short) => maxIdReader.GetInt16(0) + 1,
+                { } t when t == typeof(int) => maxIdReader.GetInt32(0) + 1,
+                { } t when t == typeof(long) => maxIdReader.GetInt64(0) + 1,
+                _ => throw new ArgumentException("Unsupported id type")
+            }
+            : 1;
+    }
+}

Projekt_Calcan_Conze/Projekt_Calcan_Conze/Repository/dbConnection.cs

@@ -1,43 +0,0 @@
-namespace Project_Calcan_Conze;
-
-using MySql.Data;
-using MySql.Data.MySqlClient;
-using MySqlX.XDevAPI;
-using System.Data.Common;
-using System.Reflection.PortableExecutable;
-using System.Xml;
-
-
-MySql.Data.MySqlClient.MySqlConnection myConnection;
-string myConnectionString;
-//set the correct values for your server, user, password and database name
-myConnectionString = "server=localhost;uid=root;pwd=root;database=vr_contact";
-
-try
-{
-    myConnection = new MySql.Data.MySqlClient.MySqlConnection(myConnectionString);
-    //open a connection
-    myConnection.Open();
-
-    // create a MySQL command and set the SQL statement with parameters
-    MySqlCommand myCommand = new MySqlCommand();
-    myCommand.Connection = myConnection;
-    myCommand.CommandText = @"SELECT * FROM workshop WHERE maxParticipants = @code;";
-    myCommand.Parameters.AddWithValue("@code", "12");
-
-    // execute the command and read the results
-    using MySqlDataReader myReader = myCommand.ExecuteReader();
-
-    while (myReader.Read())
-    {
-        int id = myReader.GetInt32("maxParticipants");
-        string name = myReader.GetString("title");
-        Console.WriteLine(id + " " + name);
-    }
-
-    myConnection.Close();
-}
-catch (MySql.Data.MySqlClient.MySqlException ex)
-{
-
-}

Projekt_Calcan_Conze/Projekt_Calcan_Conze/obj/Debug/net8.0/Projekt_Calcan_Conze.AssemblyInfo.cs

@@ -14,7 +14,7 @@ using System.Reflection;
 [assembly: System.Reflection.AssemblyCompanyAttribute("Projekt_Calcan_Conze")]
 [assembly: System.Reflection.AssemblyConfigurationAttribute("Debug")]
 [assembly: System.Reflection.AssemblyFileVersionAttribute("1.0.0.0")]
-[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0+ebcc615de4c72eb9d786776bf6bd0ceb5640648c")]
+[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0+aeb270769978c1cbdf2f285654502b991156aa86")]
 [assembly: System.Reflection.AssemblyProductAttribute("Projekt_Calcan_Conze")]
 [assembly: System.Reflection.AssemblyTitleAttribute("Projekt_Calcan_Conze")]
 [assembly: System.Reflection.AssemblyVersionAttribute("1.0.0.0")]

Projekt_Calcan_Conze/Projekt_Calcan_Conze/obj/Debug/net8.0/Projekt_Calcan_Conze.AssemblyInfoInputs.cache

@@ -1 +1 @@
-9c166b10907dc4b5eb71f19b5658d875cd05601f289a7fc5eb6bb564b59f3775
+12accfb452c230216e3ac941872f0c73361c12ee69c2b99c250749ff72d74495

Projekt_Calcan_Conze/Projekt_Calcan_Conze/obj/project.assets.json

@@ -1791,9 +1791,9 @@
   "project": {
     "version": "1.0.0",
     "restore": {
-      "projectUniqueName": "C:\\Jan_bib_Module\\PMC\\Projekt\\Projekt_Calcan_Conze\\Projekt_Calcan_Conze\\Projekt_Calcan_Conze.csproj",
+      "projectUniqueName": "C:\\Jan_bib_Module\\PMC\\Projekt\\Projekt_Calcan_Conze\\Projekt_Calcan_Conze\\Projekt_Calcan_Conze_Import.csproj",
-      "projectName": "Projekt_Calcan_Conze",
+      "projectName": "Projekt_Calcan_Conze_Import",
-      "projectPath": "C:\\Jan_bib_Module\\PMC\\Projekt\\Projekt_Calcan_Conze\\Projekt_Calcan_Conze\\Projekt_Calcan_Conze.csproj",
+      "projectPath": "C:\\Jan_bib_Module\\PMC\\Projekt\\Projekt_Calcan_Conze\\Projekt_Calcan_Conze\\Projekt_Calcan_Conze_Import.csproj",
       "packagesPath": "C:\\Users\\bib\\.nuget\\packages\\",
       "outputPath": "C:\\Jan_bib_Module\\PMC\\Projekt\\Projekt_Calcan_Conze\\Projekt_Calcan_Conze\\obj\\",
       "projectStyle": "PackageReference",

Projekt_Calcan_Conze/Projekt_Calcan_Conze/obj/project.nuget.cache

@@ -1,8 +1,8 @@
 {
   "version": 2,
-  "dgSpecHash": "3YDIWICGXm0=",
+  "dgSpecHash": "xTy/jRXZQLw=",
   "success": true,
-  "projectFilePath": "C:\\Jan_bib_Module\\PMC\\Projekt\\Projekt_Calcan_Conze\\Projekt_Calcan_Conze\\Projekt_Calcan_Conze.csproj",
+  "projectFilePath": "C:\\Jan_bib_Module\\PMC\\Projekt\\Projekt_Calcan_Conze\\Projekt_Calcan_Conze\\Projekt_Calcan_Conze_Import.csproj",
   "expectedPackageFiles": [
     "C:\\Users\\bib\\.nuget\\packages\\bouncycastle.cryptography\\2.2.1\\bouncycastle.cryptography.2.2.1.nupkg.sha512",
     "C:\\Users\\bib\\.nuget\\packages\\google.protobuf\\3.25.1\\google.protobuf.3.25.1.nupkg.sha512",

Projekt_Calcan_Conze/Projekt_Calcan_Conze_Export/Constants.cs

@@ -0,0 +1,10 @@
+namespace Projekt_Calcan_Conze_Export;
+
+internal static class Constants
+{
+    public const string DateFormat = "yyyy-MM-dd";
+
+    public const string Separator = ";";
+
+    public const string MoneyFormat = "F2";
+}

Projekt_Calcan_Conze/Projekt_Calcan_Conze_Export/Models/Billing.cs

@@ -0,0 +1,80 @@
+namespace Projekt_Calcan_Conze_Export.Models;
+
+internal class Billing
+{
+    public Billing(
+        DateOnly startDate,
+        DateOnly endDate,
+        string customerNumber,
+        string customerName,
+        List<BillingPosition> positions)
+    {
+        this.StartDate = startDate;
+        this.EndDate = endDate;
+        this.CustomerNumber = customerNumber;
+        this.CustomerName = customerName;
+        this.Positions = positions;
+    }
+
+    public DateOnly StartDate { get; }
+
+    public DateOnly EndDate { get; }
+
+    public string CustomerNumber { get; }
+
+    public string CustomerName { get; }
+
+    public double TotalAmount => this.Positions.Sum(p => p.TotalAmount);
+
+    public List<BillingPosition> Positions { get; }
+
+    public IEnumerable<string> ToCsvLines()
+    {
+        List<string> lines =
+        [
+            this.StartDate.ToString(Constants.DateFormat)
+            + Constants.Separator
+            + this.EndDate.ToString(Constants.DateFormat)
+            + Constants.Separator
+            + this.CustomerNumber
+            + Constants.Separator
+            + this.CustomerName
+            + Constants.Separator
+            + this.TotalAmount.ToString(Constants.MoneyFormat)
+
+        ];
+
+        lines.AddRange(
+            this.Positions
+                .Select(
+                    position =>
+                        position.Description
+                        + Constants.Separator
+                        + position.BaseAmount.ToString(Constants.MoneyFormat)
+                        + Constants.Separator
+                        + position.Count
+                        + Constants.Separator
+                        + position.TotalAmount.ToString(Constants.MoneyFormat)
+                        + Constants.Separator));
+
+        return lines;
+    }
+}
+
+internal class BillingPosition
+{
+    public BillingPosition(string description, double baseAmount, int count)
+    {
+        this.Description = description;
+        this.BaseAmount = baseAmount;
+        this.Count = count;
+    }
+
+    public string Description { get; }
+
+    public double BaseAmount { get; }
+
+    public int Count { get; }
+
+    public double TotalAmount => this.BaseAmount * this.Count;
+}

Projekt_Calcan_Conze/Projekt_Calcan_Conze_Export/Program.cs

@@ -0,0 +1,110 @@
+using System.Globalization;
+
+using Projekt_Calcan_Conze_Export;
+using Projekt_Calcan_Conze_Export.Models;
+using Microsoft.VisualBasic;
+
+try
+{
+    string? clientNumber = null;
+
+    while (string.IsNullOrEmpty(clientNumber))
+    {
+        Console.WriteLine("Bitte gib eine Kundennummer an:");
+        clientNumber = Console.ReadLine();
+    }
+
+    Console.WriteLine();
+
+    DateOnly? startDate = null;
+
+    while (startDate is null)
+    {
+        Console.WriteLine($"Bitte gib das Startdatum im folgenden Format an ({Constants.DateFormat}):");
+        startDate =
+            DateOnly.TryParseExact(
+                Console.ReadLine() ?? string.Empty,
+                Constants.DateFormat,
+                CultureInfo.InvariantCulture,
+                DateTimeStyles.None,
+                out var start)
+                ? start
+                : null;
+    }
+
+    Console.WriteLine();
+
+    DateOnly? endDate = null;
+
+    while (endDate is null)
+    {
+        Console.WriteLine($"Bitte gib das Enddatum im folgenden Format an ({Constants.DateFormat}):");
+        endDate =
+            DateOnly.TryParseExact(
+                Console.ReadLine() ?? string.Empty,
+                Constants.DateFormat,
+                CultureInfo.InvariantCulture,
+                DateTimeStyles.None,
+                out var end)
+                ? end
+                : null;
+
+        if (endDate is not null
+            && endDate < startDate)
+        {
+            Console.WriteLine("Das Enddatum darf nicht vor dem Startdatum liegen.");
+            endDate = null;
+        }
+    }
+
+    Console.WriteLine();
+
+    string? directoryPath = null;
+
+    while (string.IsNullOrEmpty(directoryPath))
+    {
+        Console.WriteLine("Bitte gib einen Dateipfad für die Ausgabe an:");
+        directoryPath = Console.ReadLine();
+
+        if (directoryPath?.StartsWith('\"') ?? false)
+        {
+            directoryPath = directoryPath.Substring(startIndex: 1, length: directoryPath.Length - 1);
+        }
+
+        if (directoryPath?.EndsWith('\"') ?? false)
+        {
+            directoryPath = directoryPath.Substring(startIndex: 0, length: directoryPath.Length - 1);
+        }
+
+        if (!Path.Exists(directoryPath))
+        {
+            Console.WriteLine("Der angegebene Dateipfad existiert nicht.");
+            directoryPath = null;
+        }
+    }
+
+    List<Billing> billings =
+    [
+        new Billing(
+            startDate: startDate.Value,
+            endDate: endDate.Value,
+            customerNumber: clientNumber,
+            customerName: "Max Mustermann",
+            positions:
+            [
+                new BillingPosition(
+                    description: "Testposition",
+                    baseAmount: 100.0,
+                    count: 3)
+            ])
+    ];
+    string fileName =
+        $"{DateTime.Today.ToString(Constants.DateFormat)}_{clientNumber}_{startDate.Value.ToString(Constants.DateFormat)}_{endDate.Value.ToString(Constants.DateFormat)}.csv";
+    File.WriteAllLines(
+        Path.Combine(directoryPath, fileName),
+        billings.SelectMany(billing => billing.ToCsvLines()));
+}
+catch (Exception ex)
+{
+    Console.WriteLine($"Ein Fehler ist aufgetreten: {ex.Message}");
+}

Projekt_Calcan_Conze/Projekt_Calcan_Conze_Export/Projekt_Calcan_Conze_Export.csproj

@@ -0,0 +1,10 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>