}// end of method selct data from database
//inserting data in to datbase
public bool Insert(SessionsClass c)
{
//Creating a default reture type and setting its value to false
bool isSuccess = false;
//step 1 Connect databse
SqlConnection conn = new SqlConnection(myconnstrng);
try
{
// step 2 creat a sql query to insert data
string sql = "INSERT INTO Add_Sessions (LecNames, SubNames, SubCodes, SesTag, Groupname, Duration, NoOfStudent) VALUES (@LecturerName, @subjectname, @subjectcode, @tag, @group, @duration, @Numberofstudents)";
// creat sql Command using sql conn
SqlCommand cmd = new SqlCommand(sql, conn);
//Creating to parameter to add data
cmd.Parameters.AddWithValue("@LecturerName", c.LecturerName);
cmd.Parameters.AddWithValue("@subjectname", c.subjectname);
cmd.Parameters.AddWithValue("@subjectcode", c.subjectcode);
cmd.Parameters.AddWithValue("@tag", c.tag);
cmd.Parameters.AddWithValue("@group", c.group);
cmd.Parameters.AddWithValue("@duration", c.duration);
cmd.Parameters.AddWithValue("@Numberofstudents", c.Numberofstudents);
//connection open here
conn.Open();
int rows = cmd.ExecuteNonQuery();
//if the query runs successfuly then the value of row will be greater then zero els its value will be 0
if (rows > 0)
{
isSuccess = true;
}
else
{
isSuccess = false;
}
}
catch (Exception ex)
{
}
finally
{
conn.Close();
}
return(isSuccess);
}
//Method to update data in database from this application
public bool Update(SessionsClass c)
{
//Creating a default reture type and setting its value to false
bool isSuccess = false;
SqlConnection conn = new SqlConnection(myconnstrng);
try
{
//sql updat data in our database
string sql = "UPDATE Add_Sessions SET LecNames=@LecturerName, SubNames=@subjectname, SubCodes=@subjectcode, SesTag=@tag ,Groupname=@group, Duration=@duration, NoOfStudent=@Numberofstudents WHERE SessID=@ID";
//CREAT SQL COMMAND
SqlCommand cmd = new SqlCommand(sql, conn);
//creat parameters to add value
cmd.Parameters.AddWithValue("@LecturerName", c.LecturerName);
cmd.Parameters.AddWithValue("@subjectname", c.subjectname);
cmd.Parameters.AddWithValue("@subjectcode", c.subjectcode);
cmd.Parameters.AddWithValue("@tag", c.tag);
cmd.Parameters.AddWithValue("@group", c.group);
cmd.Parameters.AddWithValue("@duration", c.duration);
cmd.Parameters.AddWithValue("@Numberofstudents", c.Numberofstudents);
cmd.Parameters.AddWithValue("@ID", c.ID);
//open databse connection
conn.Open();
int rows = cmd.ExecuteNonQuery();
//if the query runs successfuly then the value of row will be greater then zero els its value will be 0
if (rows > 0)
{
isSuccess = true;
}
else
{
isSuccess = false;
}
}
catch (Exception ex)
{
}
finally
{
conn.Close();
}
return(isSuccess);
}
//creat method to delete data from database
public bool Delete(SessionsClass c)
{
//creat a default return value and set its value to false
bool isSuccess = false;
//creat sql Connection
SqlConnection conn = new SqlConnection(myconnstrng);
try
{
//sql to delete data
string sql = "DELETE FROM Add_Sessions WHERE SessID=@ID";
//creating sql command
SqlCommand cmd = new SqlCommand(sql, conn);
cmd.Parameters.AddWithValue("@ID", c.ID);
//open connection
conn.Open();
int rows = cmd.ExecuteNonQuery();
//if the query runs successfuly then the value of row will be greater then zero els its value will be 0
if (rows > 0)
{
isSuccess = true;
}
else
{
isSuccess = false;
}
}
catch (Exception ex)
{
}
finally
{
//close connection
conn.Close();
}
return(isSuccess);
}
