//creat method to delete data from database
public bool Delete(LecturerClass 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 Lecture 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);
}
}// end of method selct data from database
//inserting data in to datbase
//inserting data in to datbase
public bool Insert(LecturerClass 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 Lecture ( LecID, Name, Faculty, Department, Building, Center, LecLevel, Rank ) VALUES (@LecID, @Name, @Faculty, @Department, @Building, @Center, @Level, @Rank) ";
// creat sql Command using sql conn
SqlCommand cmd = new SqlCommand(sql, conn);
//Creating to parameter to add data
cmd.Parameters.AddWithValue("@LecID", c.LecID);
cmd.Parameters.AddWithValue("@Name", c.Name);
cmd.Parameters.AddWithValue("@Faculty", c.Faculty);
cmd.Parameters.AddWithValue("@Department", c.Department);
cmd.Parameters.AddWithValue("@Building", c.Building);
cmd.Parameters.AddWithValue("@Center", c.Center);
cmd.Parameters.AddWithValue("@Level", c.Level);
if (c.Level.Equals("Professor"))
{
Rank = 1;
}
else if (c.Level.Equals("Assistant Professor"))
{
Rank = 2;
}
else if (c.Level.Equals("Senior Lecturer(HG)"))
{
Rank = 3;
}
else if (c.Level.Equals("Senior Lecturer"))
{
Rank = 4;
}
else if (c.Level.Equals("Lecturer"))
{
Rank = 5;
}
else if (c.Level.Equals("Assistant Lecturer"))
{
Rank = 6;
}
else
{
Rank = 7;
}
cmd.Parameters.AddWithValue("@Rank", c.Rank + "." + c.LecID);
//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(LecturerClass 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 Lecture SET LecID=@LecID, Name=@Name, Faculty=@Faculty, Department=@Department ,Building=@Building, Center=@Center, LecLevel=@Level, Rank=@Rank WHERE ID=@ID";
//CREAT SQL COMMAND
SqlCommand cmd = new SqlCommand(sql, conn);
//creat parameters to add value
cmd.Parameters.AddWithValue("@Name", c.Name);
cmd.Parameters.AddWithValue("@LecID", c.LecID);
cmd.Parameters.AddWithValue("@Faculty", c.Faculty);
cmd.Parameters.AddWithValue("@Department", c.Department);
cmd.Parameters.AddWithValue("@Building", c.Building);
cmd.Parameters.AddWithValue("@Center", c.Center);
cmd.Parameters.AddWithValue("@Level", c.Level);
//GENARATE LEVEL
if (c.Level.Equals("Professor"))
{
Rank = 1;
}
else if (c.Level.Equals("Assistant Professor"))
{
Rank = 2;
}
else if (c.Level.Equals("Senior Lecturer(HG)"))
{
Rank = 3;
}
else if (c.Level.Equals("Senior Lecturer"))
{
Rank = 4;
}
else if (c.Level.Equals("Lecturer"))
{
Rank = 5;
}
else if (c.Level.Equals("Assistant Lecturer"))
{
Rank = 6;
}
else
{
Rank = 7;
}
cmd.Parameters.AddWithValue("@Rank", c.Rank + "." + c.LecID);
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);
}