CNSA-212-FP/Louis'-Pharmacy_CNSA212-FP/PharmacyDataTier.cs

using System;
using System.Configuration;
using System.Data;
using System.Windows.Forms;
using System.Data.SqlClient;
using System.Runtime.Versioning;

namespace Louis__Pharmacy_CNSA212_FP
{
    public class PharmacyDataTier
    {
    
        static String connString = ConfigurationManager.ConnectionStrings["ConnString"].ConnectionString;
        static SqlConnection myConn = new SqlConnection(connString);
        static System.Data.SqlClient.SqlCommand cmdString = new System.Data.SqlClient.SqlCommand();
        
        public static DataSet PatientInfoSearch(string id, string lname, string fname)
        {
            try
            {
                // open connection
                myConn.Open();
                //clear any parameters
                cmdString.Parameters.Clear();
                // command
                cmdString.Connection = myConn;
                cmdString.CommandType = CommandType.StoredProcedure;
                cmdString.CommandTimeout = 1500;
                cmdString.CommandText = "SearchPatients";
                // Define input parameter
                cmdString.Parameters.Add("@ID", SqlDbType.VarChar, 8).Value = id;
                cmdString.Parameters.Add("@lname", SqlDbType.VarChar, 30).Value = lname;
                cmdString.Parameters.Add("@fname", SqlDbType.VarChar, 30).Value = fname;
                // adapter and dataset
                SqlDataAdapter aAdapter = new SqlDataAdapter();
                aAdapter.SelectCommand = cmdString;
                DataSet aDataSet = new DataSet();
        
                // fill adapter
                aAdapter.Fill(aDataSet);
        
                // return dataSet
                return aDataSet;
            }
            catch (Exception ex)
            {
                throw new ArgumentException(ex.Message);
            }
            finally
            {
                myConn.Close();
            }
        }
        
        public static DataSet PatientInfoSearch(string id)
        {
            try
            {
                // open connection
                myConn.Open();
                //clear any parameters
                cmdString.Parameters.Clear();
                // command
                cmdString.Connection = myConn;
                cmdString.CommandType = CommandType.StoredProcedure;
                cmdString.CommandTimeout = 1500;
                cmdString.CommandText = "SearchPatients";
                // Define input parameter
                cmdString.Parameters.Add("@ID", SqlDbType.VarChar, 8).Value = id;
                cmdString.Parameters.Add("@lname", SqlDbType.VarChar, 30).Value = "";
                cmdString.Parameters.Add("@fname", SqlDbType.VarChar, 30).Value = "";
                // adapter and dataset
                SqlDataAdapter aAdapter = new SqlDataAdapter();
                aAdapter.SelectCommand = cmdString;
                DataSet aDataSet = new DataSet();
        
                // fill adapter
                aAdapter.Fill(aDataSet);
        
                // return dataSet
                return aDataSet;
            }
            catch (Exception ex)
            {
                throw new ArgumentException(ex.Message);
            }
            finally
            {
                myConn.Close();
            }
        }

        
        public static DataSet PrescriptionInfoSearch(string rxID, string patientID)
        {
            try
            {
                // open connection
                myConn.Open();
                //clear any parameters
                cmdString.Parameters.Clear();
                // command
                cmdString.Connection = myConn;
                cmdString.CommandType = CommandType.StoredProcedure;
                cmdString.CommandTimeout = 1500;
                cmdString.CommandText = "PerscriptionInfoSearch";
                // Define input parameter
                cmdString.Parameters.Add("@rxID", SqlDbType.VarChar, 11).Value = rxID;
                cmdString.Parameters.Add("@patientID", SqlDbType.VarChar, 8).Value = patientID;
                // adapter and dataset
                SqlDataAdapter aAdapter = new SqlDataAdapter();
                aAdapter.SelectCommand = cmdString;
                DataSet aDataSet = new DataSet();
        
                // fill adapter
                aAdapter.Fill(aDataSet);
        
                // return dataSet
                return aDataSet;
            }
            catch (Exception ex)
            {
                throw new ArgumentException(ex.Message);
            }
            finally
            {
                myConn.Close();
            }
        }


        public static DataSet PhysicianInfoSearch(string fname,string lname, string phyID)
        {
            
            
                try
                {
                    // open connection
                    myConn.Open();
                    //clear any parameters
                    cmdString.Parameters.Clear();
                    // command
                    cmdString.Connection = myConn;
                    cmdString.CommandType = CommandType.StoredProcedure;
                    cmdString.CommandTimeout = 1500;
                    cmdString.CommandText = "PhysicianInfoSearch";
                    // Define input parameter
                    cmdString.Parameters.Add("@fname", SqlDbType.VarChar, 11).Value = fname;
                    cmdString.Parameters.Add("@lname", SqlDbType.VarChar, 8).Value = lname;
                    cmdString.Parameters.Add("@phyID", SqlDbType.VarChar, 8).Value = phyID;
                    // adapter and dataset
                    SqlDataAdapter aAdapter = new SqlDataAdapter();
                    aAdapter.SelectCommand = cmdString;
                    DataSet aDataSet = new DataSet();
        
                    // fill adapter
                    aAdapter.Fill(aDataSet);
        
                    // return dataSet
                    return aDataSet;
                }
                catch (Exception ex)
                {
                    throw new ArgumentException(ex.Message);
                }
                finally
                {
                    myConn.Close();
                }
        }
        
        public static double GetNextPatientID()
        {
            try
            {
                // open connection
                myConn.Open();
                //clear any parameters
                cmdString.Parameters.Clear();
                // command
                cmdString.Connection = myConn;
                cmdString.CommandType = CommandType.StoredProcedure;
                cmdString.CommandTimeout = 1500;
                cmdString.CommandText = "GetNextPatientID";
                // Define input parameter
                cmdString.Parameters.Add("@TableName", SqlDbType.NVarChar, 128).Value = "PATIENT";
                
                object result = cmdString.ExecuteScalar();
                double value = 0;
                try
                {
                    value = Convert.ToDouble(result);

                }
                catch(Exception e)
                {
                    MessageBox.Show("Error Getting next Patient ID","ERROR",MessageBoxButtons.OK);
                }
                
        
                // return dataSet
                return value;
            }
            catch (Exception ex)
            {
                throw new ArgumentException(ex.Message);
            }
            finally
            {
                myConn.Close();
            }
        }
    
    }
}