ADO. NET Universal Database Access Class

This article example for everyone to share ADO. NET general database access class, for your reference to learn, the specific content is as follows

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;



using System.Data;

using System.Data.SqlClient;



namespace Test

{

  public class DBHelper

  {

    public static string ConString = "Data Source=.;Initial Catalog=bankdb;User id=sa;Password=123;";



    // Methods of implementing additions, deletions and modifications 

    public static int RunNoQuery(string cmdText, CommandType cmdType, params SqlParameter[] pars)

    {

      SqlConnection con = new SqlConnection(ConString);

      con.Open();

      SqlCommand cmd = new SqlCommand(cmdText, con);

      cmd.CommandType = cmdType;

      if (pars != null && pars.Length > 0)

      {

        foreach (SqlParameter p in pars)

        {

          cmd.Parameters.Add(p);

        }

      }

      int rows = cmd.ExecuteNonQuery();

      con.Close();

      return rows;

    }



    // Execute the query ( DataSet ) 

    public static DataSet RunSelect(string cmdText, CommandType cmdType, params SqlParameter[] pars)

    {

      SqlConnection con = new SqlConnection(ConString);

     

      SqlDataAdapter da = new SqlDataAdapter(cmdText, con);

      da.SelectCommand.CommandType = cmdType;

      if (pars != null && pars.Length > 0)

      {

        foreach (SqlParameter p in pars)

        {

          da.SelectCommand.Parameters.Add(p);

        }

      }

      DataSet ds = new DataSet();

      da.Fill(ds);



      return ds;

    }



    // Execute the query to get 1 Values 

    public static object RunOneValue(string cmdText, CommandType cmdType, params SqlParameter[] pars)

    {

      SqlConnection con = new SqlConnection(ConString);

      con.Open();

      SqlCommand cmd = new SqlCommand(cmdText, con);

      cmd.CommandType = cmdType;

      if (pars != null && pars.Length > 0)

      {

        foreach (SqlParameter p in pars)

        {

          cmd.Parameters.Add(p);

        }

      }

      object obj = cmd.ExecuteScalar();

      con.Close();

      return obj;

    }

  }

}

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