DBHelper数据库操作类（二）
不错文章：http://www.codefans.net/articles/562.shtml
http://www.cnblogs.com/gaobing/p/3878342.html
using System; using System.Collections.Generic; using System.Data.SqlClient; using System.Data; using System.Configuration; using System.Reflection; using System.Collections; namespace DataHelp { #region ADO.NET 访问数据库辅助类 +SqlHelp //Author:兵兵 +SqlHelp public class SqlHelp { /// <summary> /// DB连接字符串 /// </summary> public static readonly string DB= ConfigurationManager.ConnectionStrings["DB"].ConnectionString; #region ExecuteDataReader +ExecuteDataReader(string cmdText, List<SqlParameter> parameters,string connString) /// <summary> /// ExecuteDataReader(执行有参存储过程) /// </summary> /// <param name="cmdText">存储过程名称</param> /// <param name="parameters">参数列表</param> /// <param name="connString">连接字符串</param> /// <returns>SqlDataReader对象</returns> public static SqlDataReader ExecuteDataReader(string cmdText, List<SqlParameter> parameters, string connString) { SqlConnection conn = new SqlConnection(connString); SqlCommand cmd = new SqlCommand(); CommandBuilder(cmdText, cmd, conn, parameters); SqlDataReader reader = cmd.ExecuteReader(CommandBehavior.CloseConnection); cmd.Parameters.Clear(); return reader; } #endregion #region ExecuteDataReader +ExecuteDataReader(string cmdText,string connString) /// <summary> /// ExecuteDataReader(执行无参存储过程) /// </summary> /// <param name="cmdText">存储过程</param> /// <param name="connString">连接字符串</param> /// <returns>SqlDataReader对象</returns> public static SqlDataReader ExecuteDataReader(string cmdText, string connString) { SqlConnection conn = new SqlConnection(connString); SqlCommand cmd = new SqlCommand(); CommandBuilder(cmdText, cmd, conn); SqlDataReader reader = cmd.ExecuteReader(CommandBehavior.CloseConnection); cmd.Parameters.Clear(); return reader; } #endregion #region ExecuteNonQuery +ExecuteNonQuery(string cmdText, List<SqlParameter> parameters, string connString) /// <summary> /// ExecuteNonQuery(执行有参存储过程) /// </summary> /// <param name="cmdText">存储过程名称</param> /// <param name="parameters">参数列表</param> /// <param name="connString">连接字符串</param> /// <returns>数据库受影响的行数</returns> public static int ExecuteNonQuery(string cmdText, List<SqlParameter> parameters, string connString) { using (SqlConnection conn = new SqlConnection(connString)) { SqlCommand cmd = new SqlCommand(); CommandBuilder(cmdText, cmd, conn, parameters); int result = cmd.ExecuteNonQuery(); cmd.Parameters.Clear(); return result; } } #endregion #region ExecuteNonQuery +ExecuteNonQuery(string cmdText, string connString) /// <summary> /// ExecuteNonQuery(执行无参存储过程) /// </summary> /// <param name="cmdText">存储过程名称</param> /// <param name="connString">连接字符串</param> /// <returns>数据库受影响的行数</returns> public static int ExecuteNonQuery(string cmdText, string connString) { using (SqlConnection conn = new SqlConnection(connString)) { SqlCommand cmd = new SqlCommand(); CommandBuilder(cmdText, cmd, conn); int result = cmd.ExecuteNonQuery(); cmd.Parameters.Clear(); return result; } } #endregion #region ExecuteScalar +ExecuteScalar(string cmdText, List<SqlParameter> parameters, string connString) /// <summary> /// ExecuteScalar(执行有参存储过程) /// </summary> /// <param name="cmdText">存储过程名称</param> /// <param name="parameters">参数列表</param> /// <param name="connString">连接字符串</param> /// <returns>object</returns> public static object ExecuteScalar(string cmdText, List<SqlParameter> parameters, string connString) { using (SqlConnection conn = new SqlConnection(connString)) { SqlCommand cmd = new SqlCommand(); CommandBuilder(cmdText, cmd, conn, parameters); object o = cmd.ExecuteScalar(); cmd.Parameters.Clear(); return o; } } #endregion #region ExecuteScalar +ExecuteScalar(string cmdText, string connString) /// <summary> /// ExecuteScalar(执行无参存储过程) /// </summary> /// <param name="cmdText">存储过程名称</param> /// <param name="connString">连接字符串</param> /// <returns>object</returns> public static object ExecuteScalar(string cmdText, string connString) { using (SqlConnection conn = new SqlConnection(connString)) { SqlCommand cmd = new SqlCommand(); CommandBuilder(cmdText, cmd, conn); object o = cmd.ExecuteScalar(); cmd.Parameters.Clear(); return o; } } #endregion #region ExecuteDataTable +ExecuteDataTable(string cmdText, List<SqlParameter> parameters, string connString) /// <summary> /// ExecuteDataTable(用适配器执行有参存储过程) /// </summary> /// <param name="cmdText">存储过程名称</param> /// <param name="parameters">参数列表</param> /// <param name="connString">连接字符串</param> /// <returns>DataTable</returns> public static DataTable ExecuteDataTable(string cmdText, List<SqlParameter> parameters, string connString) { using (SqlConnection conn = new SqlConnection(connString)) { SqlDataAdapter da = new SqlDataAdapter(cmdText, conn); //命令类型为存储过程 da.DeleteCommand.CommandType = CommandType.StoredProcedure; da.SelectCommand.Parameters.AddRange(parameters.ToArray()); DataTable dt = new DataTable(); da.Fill(dt); return dt; } } #endregion #region ExecuteDataTable +ExecuteDataTable(string cmdText, string connString) /// <summary> /// ExecuteDataTable(用适配器执行无参存储过程) /// </summary> /// <param name="cmdText">存储过程名称</param> /// <param name="connString">连接字符串</param> /// <returns>DataTable</returns> public static DataTable ExecuteDataTable(string cmdText, string connString) { using (SqlConnection conn = new SqlConnection(connString)) { SqlDataAdapter da = new SqlDataAdapter(cmdText, conn); //命令类型为存储过程 da.DeleteCommand.CommandType = CommandType.StoredProcedure; DataTable dt = new DataTable(); da.Fill(dt); return dt; } } #endregion #region ExecuteDataTableProc(命令+适配器) +ExecuteDataTableProc(string cmdText, List<SqlParameter> parameters, string connString) /// <summary> /// ExecuteDataTableProc(执行有参存储过程) /// </summary> /// <param name="cmdText">存储过程名称</param> /// <param name="parameters">参数列表</param> /// <param name="connString">连接字符串</param> /// <returns>DataTable</returns> public static DataTable ExecuteDataTableProc(string cmdText, List<SqlParameter> parameters, string connString) /// <summary> { using (SqlConnection conn = new SqlConnection(connString)) { SqlCommand cmd = new SqlCommand(); CommandBuilder(cmdText, cmd, conn, parameters); SqlDataAdapter adapter = new SqlDataAdapter(cmd); DataTable dt = new DataTable(); adapter.Fill(dt); cmd.Parameters.Clear(); return dt; } } #endregion #region ExecuteDataTableProc(命令+适配器) +ExecuteDataTableProc(string cmdText, string connString) /// <summary> /// ExecuteDataTableProc(执行无参存储过程) /// </summary> /// <param name="parameters">参数列表</param> /// <param name="connString">连接字符串</param> /// <returns>DataTable</returns> public static DataTable ExecuteDataTableProc(string cmdText, string connString) { using (SqlConnection conn = new SqlConnection(connString)) { SqlCommand cmd = new SqlCommand(); CommandBuilder(cmdText, cmd, conn); SqlDataAdapter adapter = new SqlDataAdapter(cmd); DataTable dt = new DataTable(); adapter.Fill(dt); cmd.Parameters.Clear(); return dt; } } #endregion #region 准备命令对象 -CommandBuilder(string cmdText, SqlCommand cmd, SqlConnection conn, List<SqlParameter> parameters) /// <summary> /// 准备命令对象(执行有参存储过程) /// </summary> /// <param name="cmdText">存储过程名称</param> /// <param name="cmd">命令对象</param> /// <param name="conn">连接对象</param> /// <param name="parameters">参数列表</param> private static void CommandBuilder(string cmdText, SqlCommand cmd, SqlConnection conn, List<SqlParameter> parameters) { if (conn.State == System.Data.ConnectionState.Closed) conn.Open(); cmd.Connection = conn; cmd.CommandText = cmdText; cmd.CommandType = System.Data.CommandType.StoredProcedure; if (parameters.Count > 0) cmd.Parameters.AddRange(parameters.ToArray()); } #endregion #region 准备命令对象 -CommandBuilder(string cmdText, SqlCommand cmd, SqlConnection conn) /// <summary> /// 准备命令对象(执行无参存储过程) /// </summary> /// <param name="cmdText">存储过程名称</param> /// <param name="cmd">命令对象</param> /// <param name="conn">连接对象</param> private static void CommandBuilder(string cmdText, SqlCommand cmd, SqlConnection conn) { if (conn.State == System.Data.ConnectionState.Closed) conn.Open(); cmd.Connection = conn; cmd.CommandText = cmdText; cmd.CommandType = System.Data.CommandType.StoredProcedure; } #endregion #region 批插入 void BulkInsert( DataTable dt, string tableName, string connStr) /// <summary> /// 批插入 void BulkInsert( DataTable dt, string tableName, string connStr) /// </summary> /// <param name="dt">所有数据的表格</param> /// <param name="tableName">表名</param> public static int BulkInsert(DataTable dt, string tableName, string connStr) { int result = -1; if (string.IsNullOrEmpty(tableName)) throw new Exception("请指定你要插入的表名"); var count = dt.Rows.Count; if (count == 0) return result; SqlTransaction sqlBulkTran = null; try { using (SqlConnection conn = new SqlConnection(connStr)) { if (conn.State == System.Data.ConnectionState.Closed) conn.Open(); sqlBulkTran = conn.BeginTransaction(); using (SqlBulkCopy copy = new SqlBulkCopy(conn, SqlBulkCopyOptions.CheckConstraints, sqlBulkTran)) { copy.DestinationTableName = tableName;//指定目标表 copy.WriteToServer(dt);//将dt中的所有行复制到SqlBulkCopy对象的DestinationTableName指定的目标表中 if (sqlBulkTran != null) { sqlBulkTran.Commit(); } result = 1; } } } catch (Exception) { if (sqlBulkTran != null) { sqlBulkTran.Rollback(); } } finally { sqlBulkTran = null; } return result; } #endregion } #endregion } #region list 扩展方法 Author:高兵兵 public static class IListUtil { /// <summary> /// 将集合类转换成DataTable /// </summary> /// <param name="list">集合</param> /// <returns></returns> public static DataTable AsDataTable<T>(this IList<T> list) { DataTable result = new DataTable(); if (list.Count > 0) { PropertyInfo[] propertys = typeof(T).GetProperties(); foreach (PropertyInfo pi in propertys) { result.Columns.Add(pi.Name, pi.PropertyType); } for (int i = 0; i < list.Count; i++) { ArrayList tempList = new ArrayList(); foreach (var item in propertys) { object obj = item.GetValue(list[i], null); tempList.Add(obj); } object[] array = tempList.ToArray(); result.LoadDataRow(array, true); } } return result; } } #endregion