/// <summary>
/// Created this method to update the teacher’s details based on provided teacher’s ID in text file
/// </summary>
/// <param name="teacherDetail"></param>
/// <returns></returns>
public bool Update(TeacherDetail teacherDetail)
{
bool returnVal = false;
try
{
if (!File.Exists(filePath))
{
Console.WriteLine("File is not Exist");
return(false);
}
else
{
if (!File.ReadAllText(filePath).Contains(teacherDetail.tId.ToString()))
{
Console.WriteLine("This ID is NOT exist, please enter a valid ID.");
return(false);
}
else
{
DataTable table = new DataTable();
var fileContents = File.ReadAllLines(filePath);
var splitFileContents = (from f in fileContents select f.Split(',')).ToArray();
StreamWriter OurStream;
File.Delete(filePath);
foreach (var line in splitFileContents)
{
if (!string.IsNullOrWhiteSpace(line[0]))
{
if (line[0] == teacherDetail.tId.ToString())
{
line[1] = teacherDetail.tName;
line[2] = teacherDetail.className;
line[3] = teacherDetail.section.ToString();
}
OurStream = File.AppendText(filePath);
OurStream.WriteLine(line[0] + "," + line[1] + "," + line[2] + "," + line[3]);
OurStream.Close();
}
}
Console.WriteLine("Records is updated successfully.......");
return(false);
}
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
return(returnVal);
}
/// <summary>
/// Created this method to retrieve the teacher’s details based on provided teacher’s ID from text file
/// </summary>
/// <param name="ID"></param>
/// <returns></returns>
public TeacherDetail Retrieve(int ID)
{
TeacherDetail teacherDetail = new TeacherDetail();
try
{
if (!File.Exists(filePath))
{
Console.WriteLine("File is not Exist");
return(teacherDetail);
}
else
{
if (!File.ReadAllText(filePath).Contains(ID.ToString()))
{
Console.WriteLine("This ID is NOT exist, please enter a valid ID to retrieve the data.");
}
else
{
DataTable table = new DataTable();
var fileContents = File.ReadAllLines(filePath);
var splitFileContents = (from f in fileContents select f.Split(',')).ToArray();
foreach (var line in splitFileContents)
{
if (!string.IsNullOrWhiteSpace(line[0]))
{
if (line[0] == ID.ToString())
{
teacherDetail.tName = line[1];
teacherDetail.className = line[2];
teacherDetail.section = Convert.ToChar(line[3]);
}
}
}
}
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
return(teacherDetail);
}
/// <summary>
/// Created this method to store the teacher’s details in text file.
/// </summary>
/// <param name="teacherDetail"></param>
/// <returns></returns>
public bool Store(TeacherDetail teacherDetail)
{
try
{
if (File.Exists(filePath))
{
if (File.ReadAllText(filePath).Length > 0)
{
if (File.ReadAllText(filePath).Contains(teacherDetail.tId.ToString()))
{
Console.WriteLine("This ID is already exist, please enter a new ID.");
}
return(false);
}
else
{
StreamWriter OurStream;
OurStream = File.AppendText(filePath);
OurStream.WriteLine(teacherDetail.tId
+ ","
+ teacherDetail.tName
+ ","
+ teacherDetail.className
+ ","
+ teacherDetail.section);
OurStream.Close();
Console.WriteLine("Record is stored successfully........");
return(true);
}
}
else
{
FileCreation();
Store(teacherDetail);
return(false);
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
return(true);
}
static void Main(string[] args)
{
string folderName = @"c:\Teachers_Data";
string pathString = System.IO.Path.Combine(folderName);
System.IO.Directory.CreateDirectory(pathString);
char continueOrNot = 'Y';
int option = 0;
TeachersDataModification teachersData = new TeachersDataModification();
TeacherDetail teacherDetail = new TeacherDetail();
Console.WriteLine("----------------------------------------------------------------");
Console.WriteLine("This is a Rainbow School Teacher's Data Management Application.");
Console.WriteLine("----------------------------------------------------------------");
try
{
while (char.ToUpper(continueOrNot) == 'Y')
{
Console.WriteLine("Select an option to perform:");
Console.WriteLine("1. Store the teacher's data");
Console.WriteLine("2. Update the teacher's data");
Console.WriteLine("3. Retrieve a teacher's data");
Console.WriteLine("4. Retrieve complete data");
Console.WriteLine(">>>>> Please type a number (1 or 2 or 3 or 4) to perform the action??");
try
{
option = Convert.ToInt32(Console.ReadLine());
if (option == 1)
{
Console.WriteLine(">>>>> Please Enter the Teacher's data to store");
Console.WriteLine(">> Teacher ID:");
teacherDetail.tId = Convert.ToInt32(Console.ReadLine());
Console.WriteLine(">> Teacher Name:");
teacherDetail.tName = Console.ReadLine();
Console.WriteLine(">> Teacher Classname:");
teacherDetail.className = Console.ReadLine();
Console.WriteLine(">> Teacher section:");
teacherDetail.section = Convert.ToChar(Console.ReadLine());
bool result = teachersData.Store(teacherDetail);
}
else if (option == 2)
{
Console.WriteLine(">>>>> Please Enter the Teacher's data to update (record will update based on the ID)");
Console.WriteLine(">> Teacher ID:");
teacherDetail.tId = Convert.ToInt32(Console.ReadLine());
Console.WriteLine(">> Teacher Name:");
teacherDetail.tName = Console.ReadLine();
Console.WriteLine(">> Teacher Classname:");
teacherDetail.className = Console.ReadLine();
Console.WriteLine(">> Teacher section:");
teacherDetail.section = Convert.ToChar(Console.ReadLine());
bool result = teachersData.Update(teacherDetail);
}
else if (option == 3)
{
Console.WriteLine(">>>>> Please Enter the Teacher's ID to Retrive the details");
Console.WriteLine(">> Teacher ID:");
int Id = Convert.ToInt32(Console.ReadLine());
teacherDetail = teachersData.Retrieve(Id);
if (!string.IsNullOrEmpty(teacherDetail.tName))
{
Console.WriteLine(">> >> Retrived Teacher Name is :" + teacherDetail.tName);
Console.WriteLine(">> >> Retrived Teacher Class(section) is :" + teacherDetail.className + "(" + teacherDetail.section + ")");
}
else
{
//Console.WriteLine("No record found");
}
}
else if (option == 4)
{
teachersData.RetrieveAll();
}
else
{
Console.WriteLine(">> invalid option, Please select a valid option from 1 , 2, 3 or 4 .....");
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
Console.WriteLine(">> >> >> Do you want to continue ? Y/N");
continueOrNot = Convert.ToChar(Console.ReadLine());
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
finally
{
Console.WriteLine(">> >> Thank you !!! << <<");
Console.WriteLine("Please press Enter to close this window ...................");
Console.ReadKey();
}
}
