Refactoring - split data, logic and model layers; custom network exception
This commit is contained in:
Dimitar Byalkov
131
StudentHouseDashboard/Data/AnnouncementRepository.cs
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131
StudentHouseDashboard/Data/AnnouncementRepository.cs
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@@ -0,0 +1,131 @@
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using Models;
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using System;
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using System.Collections.Generic;
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using System.Data.SqlClient;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace Data
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{
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public class AnnouncementRepository
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{
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public AnnouncementRepository() { }
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public List<Announcement> GetAllAnnouncements()
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{
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List<Announcement> announcements = new List<Announcement>();
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UserRepository userRepository = new UserRepository();
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using (SqlConnection conn = SqlConnectionHelper.CreateConnection())
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{
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string sql = "SELECT * FROM Announcements;";
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SqlCommand cmd = new SqlCommand(sql, conn);
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var reader = cmd.ExecuteReader();
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while (reader.Read())
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{
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Announcement announcement = new Announcement(Convert.ToInt32(reader["ID"]),
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userRepository.GetUserById(Convert.ToInt32(reader["Author"])),
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reader["Description"].ToString(), reader["Title"].ToString(),
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(DateTime)reader["PublishDate"], (bool)reader["IsImportant"],
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(bool)reader["IsSticky"]);
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CommentRepository commentRepository = new CommentRepository();
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announcement.Comments = commentRepository.GetAllCommentsOnAnnouncement(announcement.ID);
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// ID, Name, Password, Role
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announcements.Add(announcement);
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}
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conn.Close();
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}
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return announcements;
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}
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public List<Announcement> GetAnnouncementsByPage(int? p, int? c)
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{
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List<Announcement> announcements = new List<Announcement>();
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UserRepository userRepository = new UserRepository();
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if (c == null || c < 0)
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{
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c = 10;
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}
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if (p == null || p < 0)
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{
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p = 0;
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}
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using (SqlConnection conn = SqlConnectionHelper.CreateConnection())
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{
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string sql = "SELECT * FROM Announcements ORDER BY ID OFFSET @start ROWS FETCH NEXT @count ROWS ONLY;";
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SqlCommand sqlCommand = new SqlCommand(sql, conn);
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sqlCommand.Parameters.AddWithValue("@start", p * c);
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sqlCommand.Parameters.AddWithValue("@count", c);
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var reader = sqlCommand.ExecuteReader();
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while (reader.Read())
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{
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announcements.Add(new Announcement(Convert.ToInt32(reader["ID"]),
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userRepository.GetUserById(Convert.ToInt32(reader["Author"])),
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reader["Description"].ToString(), reader["Title"].ToString(),
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(DateTime)reader["PublishDate"], (bool)reader["IsImportant"],
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(bool)reader["IsSticky"]));
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}
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}
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return announcements;
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}
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public bool CreateAnnouncement(string title, string description, User author, DateTime publishDate, bool isImportant, bool isSticky)
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{
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using (SqlConnection conn = SqlConnectionHelper.CreateConnection())
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{
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string sql = "INSERT INTO Announcements (Author, Description, Title, PublishDate, IsImportant, IsSticky) VALUES (@author, @desc, @title, @date, @important, @sticky);";
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SqlCommand cmd = new SqlCommand(sql, conn);
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cmd.Parameters.AddWithValue("@author", author.ID);
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cmd.Parameters.AddWithValue("@desc", description);
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cmd.Parameters.AddWithValue("@title", title);
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cmd.Parameters.AddWithValue("@date", publishDate);
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cmd.Parameters.AddWithValue("@important", isImportant);
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cmd.Parameters.AddWithValue("@sticky", isSticky);
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int writer = cmd.ExecuteNonQuery();
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if (writer == 1)
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{
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return true;
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}
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else return false;
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}
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}
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public bool UpdateAnnouncement(int id, string title, string description, bool isImportant, bool isSticky)
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{
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using (SqlConnection conn = SqlConnectionHelper.CreateConnection())
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{
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string sql = "UPDATE Announcements " +
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"SET Description = @desc, Title = @title, IsImportant = @important, IsSticky = @sticky " +
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"WHERE Id = @id;";
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SqlCommand cmd = new SqlCommand(sql, conn);
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cmd.Parameters.AddWithValue("@desc", description);
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cmd.Parameters.AddWithValue("@title", title);
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cmd.Parameters.AddWithValue("@important", isImportant);
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cmd.Parameters.AddWithValue("@sticky", isSticky);
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cmd.Parameters.AddWithValue("@id", id);
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int writer = cmd.ExecuteNonQuery();
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if (writer == 1)
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{
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return true;
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}
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else return false;
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}
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}
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public bool DeleteAnnouncement(int id)
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{
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using (SqlConnection conn = SqlConnectionHelper.CreateConnection())
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{
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string sql = "DELETE FROM Announcements WHERE Id = @id;";
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SqlCommand cmd = new SqlCommand(sql, conn);
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cmd.Parameters.AddWithValue("@id", id);
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int writer = cmd.ExecuteNonQuery();
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if (writer == 1)
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{
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return true;
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}
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else return false;
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}
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}
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}
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}
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184
StudentHouseDashboard/Data/CommentRepository.cs
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184
StudentHouseDashboard/Data/CommentRepository.cs
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@@ -0,0 +1,184 @@
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using System.ComponentModel.Design;
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using System.Data.SqlClient;
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using Models;
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namespace Data;
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public class CommentRepository
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{
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public CommentRepository()
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{
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}
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public List<Comment> GetAllCommentsOnAnnouncement(int announcementId)
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{
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List<Comment> comments = new List<Comment>();
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using (SqlConnection connection = SqlConnectionHelper.CreateConnection())
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{
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string sql = "SELECT c.ID, c.Author, c.Description, c.Title, c.PublishDate, " +
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"u.ID UserID, u.Name UserName, u.Password, u.Role FROM AnnouncementsComments ac " +
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"INNER JOIN Comments c ON c.ID = ac.CommentID " +
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"INNER JOIN Users u ON u.ID = c.Author " +
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"WHERE ac.AnnouncementID = @announcementID";
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SqlCommand sqlCommand = new SqlCommand(sql, connection);
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sqlCommand.Parameters.AddWithValue("@announcementID", announcementId);
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var reader = sqlCommand.ExecuteReader();
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while (reader.Read())
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{
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Comment newComment = new Comment((int)reader["ID"],
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new User((int)reader["UserID"], reader["UserName"].ToString(),
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reader["Password"].ToString(), (UserRole)reader["Role"]),
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reader["Description"].ToString(), reader["Title"].ToString(),
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(DateTime)reader["PublishDate"]);
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newComment.Responses = GetAllCommentResponses(newComment.ID);
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comments.Add(newComment);
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}
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}
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return comments;
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}
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public List<Comment> GetAllCommentResponses(int commentId)
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{
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List<Comment> responses = new List<Comment>();
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using (SqlConnection connection = SqlConnectionHelper.CreateConnection())
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{
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string sql = "SELECT c.ID, c.Author, c.Description, c.Title, c.PublishDate, " +
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"u.ID UserID, u.Name UserName, u.Password, u.Role FROM CommentsResponses cr " +
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"INNER JOIN Comments c ON c.ID = cr.ResponseID " +
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"INNER JOIN Users u ON u.ID = c.Author " +
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"WHERE cr.CommentID = @commentID";
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SqlCommand sqlCommand = new SqlCommand(sql, connection);
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sqlCommand.Parameters.AddWithValue("@commentID", commentId);
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var reader = sqlCommand.ExecuteReader();
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while (reader.Read())
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{
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Comment newComment = new Comment((int)reader["ID"],
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new User((int)reader["UserID"], reader["UserName"].ToString(),
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reader["Password"].ToString(), (UserRole)reader["Role"]),
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reader["Description"].ToString(), reader["Title"].ToString(),
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(DateTime)reader["PublishDate"]);
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newComment.Responses = GetAllCommentResponses(newComment.ID);
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responses.Add(newComment);
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}
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}
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return responses;
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}
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public Comment GetCommentById(int id)
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{
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using (SqlConnection connection = SqlConnectionHelper.CreateConnection())
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{
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string sql = "SELECT c.ID, c.Author, c.Description, c.Title, c.PublishDate, " +
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"u.ID UserID, u.Name UserName, u.Password, u.Role FROM Comments c " +
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"INNER JOIN Users u ON u.ID = c.Author " +
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"WHERE c.ID = @commentID;";
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SqlCommand sqlCommand = new SqlCommand(sql, connection);
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sqlCommand.Parameters.AddWithValue("@commentID", id);
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var reader = sqlCommand.ExecuteReader();
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reader.Read();
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Comment newComment = new Comment((int)reader["ID"],
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new User((int)reader["UserID"], reader["UserName"].ToString(),
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reader["Password"].ToString(), (UserRole)reader["Role"]),
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reader["Description"].ToString(), reader["Title"].ToString(),
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(DateTime)reader["PublishDate"]);
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newComment.Responses = GetAllCommentResponses(newComment.ID);
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return newComment;
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}
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}
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public void UpdateComment(int id, string description)
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{
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using (SqlConnection connection = SqlConnectionHelper.CreateConnection())
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{
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string sql = "UPDATE Comments " +
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"SET Description = @desc " +
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"WHERE Id = @id;";
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SqlCommand cmd = new SqlCommand(sql, connection);
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cmd.Parameters.AddWithValue("@desc", description);
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cmd.Parameters.AddWithValue("@id", id);
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int writer = cmd.ExecuteNonQuery();
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}
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}
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private Comment CreateComment(User author, string description, string title, DateTime publishDate)
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{
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using (SqlConnection connection = SqlConnectionHelper.CreateConnection())
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{
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string sql = "INSERT INTO Comments (Author, Description, Title, PublishDate) " +
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"VALUES (@author, @desc, @title, @date); " +
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"SELECT SCOPE_IDENTITY();";
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SqlCommand cmd = new SqlCommand(sql, connection);
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cmd.Parameters.AddWithValue("@author", author.ID);
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cmd.Parameters.AddWithValue("@desc", description);
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cmd.Parameters.AddWithValue("@title", title);
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cmd.Parameters.AddWithValue("@date", publishDate);
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return GetCommentById(Convert.ToInt32(cmd.ExecuteScalar()));
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}
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}
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public void CreateCommentOnAnnouncement(User author, string description, string title, DateTime publishDate, int announcementId)
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{
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Comment comment = CreateComment(author, description, title, publishDate);
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using (SqlConnection connection = SqlConnectionHelper.CreateConnection())
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{
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string sql = "INSERT INTO AnnouncementsComments (AnnouncementID, CommentID) VALUES (@announcementID, @commentID);";
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SqlCommand cmd = new SqlCommand(sql, connection);
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cmd.Parameters.AddWithValue("@announcementID", announcementId);
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cmd.Parameters.AddWithValue("@commentID", comment.ID);
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int writer = cmd.ExecuteNonQuery();
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}
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}
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public void CreateResponseOnComment(User author, string description, string title, DateTime publishDate, int commentId)
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{
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Comment response = CreateComment(author, description, title, publishDate);
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using (SqlConnection connection = SqlConnectionHelper.CreateConnection())
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{
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string sql = "INSERT INTO CommentsResponses (CommentID, ResponseID) VALUES (@commentID, @responseID);";
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SqlCommand cmd = new SqlCommand(sql, connection);
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cmd.Parameters.AddWithValue("@commentID", commentId);
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cmd.Parameters.AddWithValue("@responseID", response.ID);
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int writer = cmd.ExecuteNonQuery();
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}
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}
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private void DeleteComment(int id)
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{
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using (SqlConnection connection = SqlConnectionHelper.CreateConnection())
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{
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string sql = "DELETE FROM Comments " +
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"WHERE Id = @id;";
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SqlCommand cmd = new SqlCommand(sql, connection);
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cmd.Parameters.AddWithValue("@id", id);
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int writer = cmd.ExecuteNonQuery();
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}
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}
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public void DeleteCommentOnAnnouncement(int commentId, int announcementId)
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{
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using (SqlConnection connection = SqlConnectionHelper.CreateConnection())
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{
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string sql = "DELETE FROM AnnouncementsComments " +
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"WHERE CommentID = @commentId AND AnnouncementID = @announcementId";
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SqlCommand cmd = new SqlCommand(sql, connection);
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cmd.Parameters.AddWithValue("@commentId", commentId);
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cmd.Parameters.AddWithValue("@announcementId", announcementId);
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int writer = cmd.ExecuteNonQuery();
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}
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DeleteComment(commentId);
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}
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public void DeleteResponseOnComment(int responseId, int commentId)
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{
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using (SqlConnection connection = SqlConnectionHelper.CreateConnection())
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{
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string sql = "DELETE FROM AnnouncementsComments " +
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"WHERE CommentID = @commentId AND ResponseID = @responseId";
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SqlCommand cmd = new SqlCommand(sql, connection);
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cmd.Parameters.AddWithValue("@commentId", commentId);
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cmd.Parameters.AddWithValue("@responseId", responseId);
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int writer = cmd.ExecuteNonQuery();
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}
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DeleteComment(commentId);
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}
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}
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17
StudentHouseDashboard/Data/Data.csproj
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17
StudentHouseDashboard/Data/Data.csproj
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@@ -0,0 +1,17 @@
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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<TargetFramework>net6.0</TargetFramework>
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<ImplicitUsings>enable</ImplicitUsings>
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<Nullable>enable</Nullable>
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</PropertyGroup>
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<ItemGroup>
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<PackageReference Include="System.Data.SqlClient" Version="4.8.5" />
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</ItemGroup>
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<ItemGroup>
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<ProjectReference Include="..\Models\Models.csproj" />
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</ItemGroup>
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</Project>
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20
StudentHouseDashboard/Data/Exceptions.cs
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20
StudentHouseDashboard/Data/Exceptions.cs
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@@ -0,0 +1,20 @@
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Net;
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using System.Text;
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using System.Threading.Tasks;
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namespace Data
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{
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public class DatabaseNetworkException : WebException
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{
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public DatabaseNetworkException(string? message) : base(message)
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{
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}
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public DatabaseNetworkException(string? message, Exception? innerException) : base(message, innerException)
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{
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}
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}
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}
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29
StudentHouseDashboard/Data/SqlConnectionHelper.cs
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29
StudentHouseDashboard/Data/SqlConnectionHelper.cs
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@@ -0,0 +1,29 @@
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using System;
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using System.Collections.Generic;
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using System.Data.SqlClient;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace Data
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{
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public static class SqlConnectionHelper
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{
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private static string connectionString = "Server=mssqlstud.fhict.local;Database=dbi509645;User Id=dbi509645;Password=sNPNBm*BX!6z8RM;";
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public static SqlConnection CreateConnection()
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{
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SqlConnection connection = new SqlConnection(connectionString);
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try
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{
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connection.Open();
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}
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catch (SqlException e)
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{
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throw new DatabaseNetworkException("Unable to access FHICT VDI database", e);
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// Console.WriteLine("Database connection error. Are you connected to the VDI VPN?");
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}
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return connection;
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}
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}
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}
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142
StudentHouseDashboard/Data/UserRepository.cs
Normal file
142
StudentHouseDashboard/Data/UserRepository.cs
Normal file
@@ -0,0 +1,142 @@
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using System.Data.SqlClient;
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using Models;
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using System.Data;
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using System.Xml.Linq;
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namespace Data
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{
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public class UserRepository
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{
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public UserRepository() { }
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public List<User> GetAllUsers()
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{
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var users = new List<User>();
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|
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using (SqlConnection conn = SqlConnectionHelper.CreateConnection())
|
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{
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string sql = "SELECT * FROM Users;";
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SqlCommand cmd = new SqlCommand(sql, conn);
|
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var reader = cmd.ExecuteReader();
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while (reader.Read())
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{
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// ID, Name, Password, Role
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users.Add(new User(Convert.ToInt32(reader["ID"]),
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reader["Name"].ToString(),
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reader["Password"].ToString(),
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(UserRole)reader["Role"])
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);
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}
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}
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return users;
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}
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public User GetUserById(int id)
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{
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using (SqlConnection conn = SqlConnectionHelper.CreateConnection())
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{
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string sql = "SELECT * FROM Users WHERE ID = @id;";
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||||
SqlCommand cmd = new SqlCommand(sql, conn);
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cmd.Parameters.AddWithValue("@id", id);
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var reader = cmd.ExecuteReader();
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reader.Read();
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// ID, Name, Password, Role
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return new User(Convert.ToInt32(reader["ID"]),
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reader["Name"].ToString(),
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reader["Password"].ToString(),
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(UserRole)reader["Role"]);
|
||||
}
|
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}
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||||
public List<User> GetUsersByPage(int? p, int? c)
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||||
{
|
||||
List<User> users = new List<User>();
|
||||
if (c == null || c < 0)
|
||||
{
|
||||
c = 10;
|
||||
}
|
||||
if (p == null || p < 0)
|
||||
{
|
||||
p = 0;
|
||||
}
|
||||
using (SqlConnection conn = SqlConnectionHelper.CreateConnection())
|
||||
{
|
||||
string sql = "SELECT * FROM Users ORDER BY ID OFFSET @start ROWS FETCH NEXT @count ROWS ONLY;";
|
||||
SqlCommand sqlCommand = new SqlCommand(sql, conn);
|
||||
sqlCommand.Parameters.AddWithValue("@start", p * c);
|
||||
sqlCommand.Parameters.AddWithValue("@count", c);
|
||||
var reader = sqlCommand.ExecuteReader();
|
||||
while (reader.Read())
|
||||
{
|
||||
users.Add(new User(Convert.ToInt32(reader["ID"]), reader["Name"].ToString(),
|
||||
reader["Password"].ToString(), (UserRole)reader["Role"]));
|
||||
}
|
||||
|
||||
}
|
||||
return users;
|
||||
}
|
||||
public bool CreateUser(string name, string password, UserRole role)
|
||||
{
|
||||
using (SqlConnection conn = SqlConnectionHelper.CreateConnection())
|
||||
{
|
||||
string sql = "INSERT INTO Users (Name, Password, Role) VALUES (@name, @pass, @role);";
|
||||
SqlCommand cmd = new SqlCommand(sql, conn);
|
||||
cmd.Parameters.AddWithValue("@name", name);
|
||||
cmd.Parameters.AddWithValue("@pass", password);
|
||||
cmd.Parameters.AddWithValue("@role", (int)role);
|
||||
int writer = cmd.ExecuteNonQuery();
|
||||
|
||||
if (writer == 1)
|
||||
{
|
||||
return true;
|
||||
}
|
||||
else return false;
|
||||
}
|
||||
}
|
||||
public bool UpdateUser(int id, string name, string password, UserRole role)
|
||||
{
|
||||
using (SqlConnection conn = SqlConnectionHelper.CreateConnection())
|
||||
{
|
||||
string sql = "UPDATE Users " +
|
||||
"SET Name = @name, Password = @pass, Role = @role " +
|
||||
"WHERE ID = @id;";
|
||||
SqlCommand cmd = new SqlCommand(sql, conn);
|
||||
cmd.Parameters.AddWithValue("@name", name);
|
||||
cmd.Parameters.AddWithValue("@pass", password);
|
||||
cmd.Parameters.AddWithValue("@role", (int)role);
|
||||
cmd.Parameters.AddWithValue("@id", id);
|
||||
int writer = cmd.ExecuteNonQuery();
|
||||
|
||||
if (writer == 1)
|
||||
{
|
||||
return true;
|
||||
}
|
||||
else return false;
|
||||
}
|
||||
}
|
||||
public bool DisableUser(int id)
|
||||
{
|
||||
using (SqlConnection conn = SqlConnectionHelper.CreateConnection())
|
||||
{
|
||||
string sql = "UPDATE Users " +
|
||||
"SET Name = 'Deleted User @id', Password = '0'" +
|
||||
"WHERE ID = @id;";
|
||||
SqlCommand cmd = new SqlCommand(sql, conn);
|
||||
cmd.Parameters.AddWithValue("@id", id);
|
||||
int writer = cmd.ExecuteNonQuery();
|
||||
|
||||
if (writer == 1)
|
||||
{
|
||||
return true;
|
||||
}
|
||||
else return false;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user