public static List <StudentCourse> mapStudentCourses(DataSet ds)
{
List <StudentCourse> studentCourses = new List <StudentCourse>();
try
{
foreach (DataRow row in ds.Tables[0].Rows)
{
StudentCourse studentCourse = new StudentCourse();
studentCourse.course_No = int.Parse(row["Course_no"].ToString());
studentCourse.description = row["Description"].ToString();
if (row["Cost"] != DBNull.Value)
{
studentCourse.cost = Decimal.Parse(row["Cost"].ToString());
}
if (row["Prerequisite"] != DBNull.Value)
{
studentCourse.prerequisite = int.Parse(row["Prerequisite"].ToString());
}
studentCourse.created_by = row["Created_By"].ToString();
studentCourse.created_date = Convert.ToDateTime(row["Created_Date"].ToString());
studentCourse.modified_by = row["Modified_By"].ToString();
studentCourse.modified_date = Convert.ToDateTime(row["Modified_Date"].ToString());
studentCourses.Add(studentCourse);
}
} catch (Exception ex)
{
}
return(studentCourses);
}
public static StudentCourse updateCourse(StudentCourse course)
{
string sql = "UPDATE Course SET " +
" description = ?, " +
" cost = ?, " +
" prerequisite = ?, " +
" modified_by = ?, " +
" modified_date = ? " +
" WHERE course_no = ?";
OleDbConnection conn = new OleDbConnection(connStr);
OleDbCommand cmd = new OleDbCommand(sql, conn);
cmd.Parameters.AddWithValue("@description", course.description);
cmd.Parameters.AddWithValue("@cost", course.cost);
cmd.Parameters.AddWithValue("@prerequisite", course.prerequisite);
cmd.Parameters.AddWithValue("@modified_by", course.modified_by);
cmd.Parameters.AddWithValue("@modified_date", course.modified_date);
cmd.Parameters.AddWithValue("@course_no", course.course_No);
conn.Open();
cmd.ExecuteNonQuery();
conn.Close();
return(course);
}
public static StudentCourse updateCourse(StudentCourse course)
{
CourseDbContext db = new CourseDbContext();
db.Entry(course).State = EntityState.Modified;
db.SaveChanges();
return(course);
}
public static StudentCourse getCourse(int id)
{
StudentCourse course = new StudentCourse();
CourseDbContext db = new CourseDbContext();
course = db.courses.Find(id);
return(course);
}
/************************** Shared Methods ********************************/
public static StudentCourse mapStudentCourse(DataRow row)
{
StudentCourse studentCourse = new StudentCourse();
studentCourse.course_No = int.Parse(row["Course_no"].ToString());
studentCourse.description = row["Description"].ToString();
if (row["Cost"] != DBNull.Value)
{
studentCourse.cost = Decimal.Parse(row["Cost"].ToString());
}
if (row["Prerequisite"] != DBNull.Value)
{
studentCourse.prerequisite = int.Parse(row["Prerequisite"].ToString());
}
studentCourse.created_by = row["Created_By"].ToString();
studentCourse.created_date = Convert.ToDateTime(row["Created_Date"].ToString());
studentCourse.modified_by = row["Modified_By"].ToString();
studentCourse.modified_date = Convert.ToDateTime(row["Modified_Date"].ToString());
return(studentCourse);
}
public static StudentCourse getCourse(int id)
{
StudentCourse course = new StudentCourse();
try
{
string sql = "SELECT * FROM Course " +
"WHERE course_no = ?";
DataSet ds = new DataSet();
OleDbConnection conn = new OleDbConnection(connStr);
OleDbCommand cmd = new OleDbCommand(sql, conn);
cmd.Parameters.AddWithValue("@course_no", id);
OleDbDataAdapter da = new OleDbDataAdapter(cmd);
da.Fill(ds);
course = OracleMethods.mapStudentCourse(ds.Tables[0].Rows[0]);
}
catch (Exception ex)
{
}
return(course);
}
public static StudentCourse updateCourseSQL(StudentCourse course)
{
string sql = "UPDATE Course SET " +
" description = @description, " +
" cost = @cost, " +
" prerequisite = @prerequisite, " +
" modified_by = @modified_by, " +
" modified_date = @modified_date " +
" WHERE course_no = @course_no;";
CourseDbContext db = new CourseDbContext();
List <SqlParameter> sqlParams = new List <SqlParameter>();
sqlParams.Add(new SqlParameter("@description", course.description));
sqlParams.Add(new SqlParameter("@cost", course.cost));
sqlParams.Add(new SqlParameter("@prerequisite", course.prerequisite));
sqlParams.Add(new SqlParameter("@modified_by", course.modified_by));
sqlParams.Add(new SqlParameter("@modified_date", course.modified_date));
sqlParams.Add(new SqlParameter("@course_no", course.course_No));
db.Database.ExecuteSqlCommand(sql, sqlParams.ToArray());
return(course);
}
