C# Form Application Database Class Yapısı

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Data.SqlClient;
using System.Data;
using System.Windows.Forms;



namespace BelediyeProje_58
{
    class Veritabani
    {



        SqlConnection baglanti = null;
        SqlCommand command;
        public Veritabani()
        {
            string str = "Data Source=HP;Initial Catalog=BelediyeOtomasyonu;Integrated Security=True";
            baglanti = new SqlConnection(str);
            try
            { baglanti.Open(); }
            catch(Exception ex)
            {
                MessageBox.Show(ex.Message);
            }

            
            
        }
        public DataTable SelectSorgusuCalistir(string sSorgu)
        {
            try
            {

                if (baglanti.State == ConnectionState.Closed)
                    baglanti.Open();

                SqlDataAdapter da = new SqlDataAdapter(sSorgu, baglanti);
                da.SelectCommand.ExecuteNonQuery();
                DataTable dt = new DataTable();
                da.Fill(dt);
                baglanti.Close();
                return dt;
            }
            catch (Exception hata)
            {

                MessageBox.Show("İşlem Sırasında Hata Oluştu." + hata.Message);
                return null;
            }

        }


        public SqlDataReader SendQuery(string query)
        {
            
            try
            {
                query = Splash(query);
                command = new SqlCommand(query, baglanti);
                return command.ExecuteReader();
            }
            catch (Exception ex)
            {
                MessageBox.Show("Hata", ex.Message);
                return null;
            }
        }

        public string Splash(string temp)
        {
            string last = string.Empty;
            foreach (char item in temp)
            {
                if (item == '\\')
                {
                    last = last + '\\' + '\\';
                }
                else
                {
                    last = last + item;
                }
            }
            return last;
        }

        public void InsertveUpdateSorgusuCalistir(string sorgu)
        {



            try
            {
                if (baglanti.State == ConnectionState.Closed)
                    baglanti.Open();

                SqlCommand com = new SqlCommand(sorgu);
                com.CommandType = CommandType.Text;
                com.Connection = baglanti;
                com.ExecuteNonQuery();
                MessageBox.Show("İşlem Tamamlandı",
                   "Bilgilendirme",
                   MessageBoxButtons.OK,
                   MessageBoxIcon.Information,
                   MessageBoxDefaultButton.Button1);
                baglanti.Close();


            }
            catch (Exception hata)
            {
                MessageBox.Show("İşlem Sırasında Hata Oluştu." + hata.Message);
            }


        }






    }

}
Veritabani.cs
Veritabani.cs görüntüleniyor.