/// <summary>
/// Loads data from file to BinarySearchTree object.
/// </summary>
/// <param name="filename">Name of file from which to load data.</param>
/// <param name="studentsAsBinaryTree">BinarySearchTree object in which to store data.</param>
internal void LoadStudents(string filename, BinarySearchTree <StudentTestMark> studentsAsBinaryTree)
{
if (File.Exists(filename))
{
// load all bytes into MemoryStrem
var memoryFile = new MemoryStream(File.ReadAllBytes(filename));
// then read them through Binary Reader
using (var reader = new BinaryReader(memoryFile))
{
while (reader.BaseStream.Position < reader.BaseStream.Length - 1)
{
var studentAndHisMark = new StudentTestMark
{
Name = reader.ReadString(),
TestName = reader.ReadString(),
TestDate = DateTime.FromBinary(reader.ReadInt64()),
Assessment = reader.ReadInt32()
};
studentsAsBinaryTree.Add(studentAndHisMark);
}
}
}
}
/// <summary>
/// Default IComparable method which may be needed for BinarySearchTree creation (in case
/// a custom Comparison method is not specified in the call of BinarySearchTree constructor)
/// </summary>
/// <param name="other">The other object to compare this object to.</param>
/// <returns>0 = equal, -1 = this is less than the other, 1 = this is higher than the other.</returns>
public int CompareTo(StudentTestMark other)
{
return(this.Assessment.CompareTo(other.Assessment));
}
