Implement communication with SQL server in ASP.NET class

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insert-update-delete code for sql server in asp.net class--How do I change this code for sql server

class 1

C#

public class NoeAutoE
   {
       public UInt64 NoeAutoId { get; set; }
       public String Nam { get; set; }
       public String Tozihat { get; set; }

   }

class 2

C#

public class NoeAutoEx
{
    public static void Insert(NoeAutoE nau)
    {
        String SQL = "INSERT INTO NoeAuto (NoeAutoId,Nam,Tozihat)VALUES(" + nau.NoeAutoId.ToString() + ",'"+nau.Nam+"','"+nau.Tozihat+"')";
        DataBase db = new DataBase();
        db.Execute(SQL);
    }

    public static void Update(NoeAutoE nau)
    {
        String SQL = "UPDATE NoeAuto SET Nam='" + nau.Nam + "',Tozihat='" + nau.Tozihat + "' WHERE NoeAutoId=" + nau.NoeAutoId.ToString();
        DataBase db = new DataBase();
        db.Execute(SQL);
    }

    public static void Delete(NoeAutoE nau)
    {
        String SQL = "DELETE FROM NoeAuto WHERE NoeAutoId=" + nau.NoeAutoId.ToString();
        DataBase db = new DataBase();
        db.Execute(SQL);
    }

    public static DataTable Fill()
    {
        String SQL = "SELECT * FROM NoeAuto Order By NoeAutoId DESC";
        DataBase db = new DataBase();
        DataTable dt = new DataTable();
        dt = db.ExecuteSelect(SQL);
        return dt;

    }
    public static UInt64 FindNextNoeAutoId()
    {
        String SQL = "SELECT MAX(NoeAutoId) FROM NoeAuto";
        DataBase db = new DataBase();
        DataTable dt = new DataTable();
        dt = db.ExecuteSelect(SQL);

        if (dt.Rows[0][0].ToString() == "")
        {
            return 1;
        }
        else
        {
            return Convert.ToUInt64(dt.Rows[0][0].ToString()) + 1;

        }
    }

    public static NoeAutoE Fill(UInt64 NoeAutoId)
    {
        String SQL = "SELECT * FROM NoeAuto WHERE NoeAutoId=" +NoeAutoId.ToString() ;
        DataBase db = new DataBase();
        DataTable dt = new DataTable();
        dt = db.ExecuteSelect(SQL);
        NoeAutoE nau = new NoeAutoE();
        nau.NoeAutoId = UInt64.Parse(dt.Rows[0]["NoeAutoId"].ToString());
        nau.Nam = dt.Rows[0]["Nam"].ToString();
        nau.Tozihat = dt.Rows[0]["Tozihat"].ToString();
        return nau;

    }

    public static void FilldrpNoeAuto(ref DropDownList drpNoeAuto)
    {
        String SQL = "SELECT * FROM NoeAuto";
        DataBase db = new DataBase();
        DataTable dt = new DataTable();
        dt = db.ExecuteSelect(SQL);
        for (int i = 0; i < dt.Rows.Count; i++)
        {
            drpNoeAuto.Items.Add(dt.Rows[i]["Nam"].ToString());
        }

    }
}

How do I change this code for sql server???

Posted 28-Apr-13 2:54am

twinsmm

Updated 28-Apr-13 3:47am

Kenneth Haugland

v4

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Hemant Singh Rautela · Answer 1 · 2013-04-28T04:38:00

Hi,

For Insert/Update/Delete you can use

C#

public bool Insert(string sQry)
   {
       try
       {
con = new SqlConnection(WebConfigurationManager.ConnectionStrings["connectionstring"].ConnectionString);
           con.Open();
           SqlCommand cmd = new SqlCommand(sQry, con);
           cmd.ExecuteNonQuery();
           return true;
       }
       catch (Exception ex)
       {
           return false;
       }
       finally
       {
           con.Close();
       }
   }

And for select query you can use below code

C#

public DataTable LoadDataTable(string sQry)
   {
       DataTable dt = new DataTable();
       try
       {
         con = new SqlConnection(WebConfigurationManager.ConnectionStrings["connectionstring"].ConnectionString);
           SqlDataAdapter sDap = new SqlDataAdapter(sQry, con);
           sDap.Fill(dt);
           return dt;
       }
       catch (Exception ex)
       {
           return null;
       }
   }

Above code is vary simple and just for start coding with asp.net & sql , but in professional work query fired using stored procedure...