时间:2021-07-01 10:21:17 帮助过:43人阅读
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。