本文实例为大家分享了ADO.NET通用数据库访问类，供大家参考学习，具体内容如下

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;"; //执行增删改的方法 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; } //执行查询（DataSet）的方法 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; } //执行查询得到一个值 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; } }}

以上就是本文的全部内容，希望对大家的学习有所帮助。