// Insert data into Database
public int Insert(InvoiceClass i)
{
// Step 1: Connect database
SqlConnection conn = new SqlConnection(myconnstr);
// Step 2: Create a SQL Query to insert data
string sql = "INSERT INTO Invoice (CSR_ID, Patient_ID, Date, Description, Total) " +
"OUTPUT INSERTED.Invoice_ID " +
"VALUES (@CsrId, @PatientId, @Date, @Description, @Total)";
using (SqlCommand cmd = new SqlCommand(sql, conn))
{
// Create parameters to add data
cmd.Parameters.AddWithValue("@CsrId", i.CsrId);
cmd.Parameters.AddWithValue("@PatientId", i.PatientId);
cmd.Parameters.AddWithValue("@Date", i.Date);
cmd.Parameters.AddWithValue("@Description", i.Description);
cmd.Parameters.AddWithValue("@Total", i.Total);
conn.Open();
int modified = (int)cmd.ExecuteScalar();
if (conn.State == System.Data.ConnectionState.Open)
{
conn.Close();
}
return(modified);
}
}
// Method to delete data from database
public bool Delete(InvoiceClass i)
{
// 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 Invoice WHERE Invoice_ID=@InvoiceId";
// Create SQL command
SqlCommand cmd = new SqlCommand(sql, conn);
cmd.Parameters.AddWithValue("@InvoiceId", i.InvoiceId);
// 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);
}
