// Insert data into Database
public bool Insert(PrescriptionClass p)
{
// Create a default return type and set its value to false
bool isSuccess = false;
// Step 1: Connect database
SqlConnection conn = new SqlConnection(myconnstr);
try
{
// Step 2: Create a SQL Query to insert data
string sql = "INSERT INTO Prescription (Patient_ID, Doctor_ID, Drug_ID, Date, Period, Dosage, Description) " +
"VALUES (@PatientId, @DoctorId, @DrugId, @Date, @Period, @Dosage, @Description)";
// Create SQL command using sql and conn
SqlCommand cmd = new SqlCommand(sql, conn);
// Create parameters to add data
cmd.Parameters.AddWithValue("@PatientId", p.PatientId);
cmd.Parameters.AddWithValue("@DoctorId", p.DoctorId);
cmd.Parameters.AddWithValue("@DrugId", p.DrugId);
cmd.Parameters.AddWithValue("@Date", p.Date);
cmd.Parameters.AddWithValue("@Period", p.Period);
cmd.Parameters.AddWithValue("@Dosage", p.Dosage);
cmd.Parameters.AddWithValue("@Description", p.Description);
// Open connection here
conn.Open();
int rows = cmd.ExecuteNonQuery();
// If the query runs successfully then the value of rows will be greater than zero else its value will be 0
if (rows > 0)
{
isSuccess = true;
}
else
{
isSuccess = false;
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
finally
{
conn.Close();
}
return(isSuccess);
}
// Method to update data in database from our application
public bool Update(PrescriptionClass p)
{
// Create a default return type and set its default value to false
bool isSuccess = false;
SqlConnection conn = new SqlConnection(myconnstr);
try
{
// SQL to update data in our database
string sql = "UPDATE Prescription SET Patient_ID=@PatientId, Doctor_ID=@DoctorId, Drug_ID=@DrugId, Date=@Date, Period=@Period, Dosage=@Dosage, Description=@Description " +
"WHERE Prescription_ID=@PrescriptionId";
// Create SQL command
SqlCommand cmd = new SqlCommand(sql, conn);
// Create parameters to add value
cmd.Parameters.AddWithValue("@PatientId", p.PatientId);
cmd.Parameters.AddWithValue("@DoctorId", p.DoctorId);
cmd.Parameters.AddWithValue("@DrugId", p.DrugId);
cmd.Parameters.AddWithValue("@Date", p.Date);
cmd.Parameters.AddWithValue("@Period", p.Period);
cmd.Parameters.AddWithValue("@Dosage", p.Dosage);
cmd.Parameters.AddWithValue("@Description", p.Description);
cmd.Parameters.AddWithValue("PrescriptionId", p.PrescriptionId);
// Open database connection
conn.Open();
int rows = cmd.ExecuteNonQuery();
// If the query runs successfully then the value of rows will be greater than zero else its value will be 0
if (rows > 0)
{
isSuccess = true;
}
else
{
isSuccess = false;
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
finally
{
conn.Close();
}
return(isSuccess);
}
// Method to delete data from database
public bool Delete(PrescriptionClass p)
{
// Create a default return type and set its default value to false
bool isSuccess = false;
// Create SQL connection
SqlConnection conn = new SqlConnection(myconnstr);
try
{
// SQL to delete data
string sql = "DELETE FROM Prescription WHERE Prescription_ID=@PrescriptionId";
// Create SQL command
SqlCommand cmd = new SqlCommand(sql, conn);
cmd.Parameters.AddWithValue("@PrescriptionId", p.PrescriptionId);
// Open connection
conn.Open();
int rows = cmd.ExecuteNonQuery();
// If the query runs successfully then the value of rows will be greater than zero else its value will be 0
if (rows > 0)
{
isSuccess = true;
}
else
{
isSuccess = false;
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
finally
{
// Close connection
conn.Close();
}
return(isSuccess);
}