}// end of method selct data from database
//inserting data in to datbase
public bool Insert(SubjectClass 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_Subject (SubCode, SubName, OfferedYear, OfferedSem, LecHours, TuteHours, LabHours, EvaHours) VALUES (@SubjectCode, @SubjectName, @OfferedYear, @OfferedSemeste, @NumberofLecHours, @NumberofTuteHours, @NumberofLabHours, @NumberofEvaluHours) ";
// creat sql Command using sql conn
SqlCommand cmd = new SqlCommand(sql, conn);
//Creating to parameter to add data
cmd.Parameters.AddWithValue("@SubjectCode", c.SubjectCode);
cmd.Parameters.AddWithValue("@SubjectName", c.SubjectName);
cmd.Parameters.AddWithValue("@OfferedYear", c.OfferedYear);
cmd.Parameters.AddWithValue("@OfferedSemeste", c.OfferedSemester);
cmd.Parameters.AddWithValue("@NumberofLecHours", c.NumberofLecHours);
cmd.Parameters.AddWithValue("@NumberofTuteHours", c.NumberofTuteHours);
cmd.Parameters.AddWithValue("@NumberofLabHours", c.NumberofLabHours);
cmd.Parameters.AddWithValue("@NumberofEvaluHours", c.NumberofEvaluHours);
//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(SubjectClass 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_Subject SET SubCode=@SubjectCode, SubName=@SubjectName, OfferedYear=@OfferedYear ,OfferedSem=@OfferedSemeste, LecHours=@NumberofLecHours, TuteHours=@NumberofTuteHours, LabHours=@NumberofLabHours, EvaHours=@NumberofEvaluHours WHERE ID=@ID";
//CREAT SQL COMMAND
SqlCommand cmd = new SqlCommand(sql, conn);
//creat parameters to add value
cmd.Parameters.AddWithValue("@SubjectCode", c.SubjectCode);
cmd.Parameters.AddWithValue("@SubjectName", c.SubjectName);
cmd.Parameters.AddWithValue("@OfferedYear", c.OfferedYear);
cmd.Parameters.AddWithValue("@OfferedSemeste", c.OfferedSemester);
cmd.Parameters.AddWithValue("@NumberofLecHours", c.NumberofLecHours);
cmd.Parameters.AddWithValue("@NumberofTuteHours", c.NumberofTuteHours);
cmd.Parameters.AddWithValue("@NumberofLabHours", c.NumberofLabHours);
cmd.Parameters.AddWithValue("@NumberofEvaluHours", c.NumberofEvaluHours);
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(SubjectClass 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_Subject WHERE ID=@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);
}
