文件名称:
SQLite ADO.NET 2.03.5 +示例源码
开发工具:
文件大小: 5mb
下载次数: 0
上传时间: 2009-09-13
详细说明：
using System; using System.Collections.Generic; using System.Text; using System.Web; using System.Configuration; using System.Data; using System.Data.SQLite; namespace DAL { public class Sqlite { /// /// 获得连接对象 // / /// public static SQLiteConnection GetSQLiteConnection() { return new SQLiteConnection("Data Source=" + System.Web.HttpContext.Current.Server.MapPath(System.Configuration.ConfigurationManager.AppSettings["db"].ToString())); } private static void PrepareCommand(SQLiteCommand cmd, SQLiteConnection conn, string cmdText, params object[] p) { if (conn.State != ConnectionState.Open) conn.Open(); cmd.Parameters.Clear(); cmd.Connection = conn; cmd.CommandText = cmdText; cmd.CommandType = CommandType.Text; cmd.CommandTimeout = 30; if (p != null) { foreach (object parm in p) cmd.Parameters.AddWithValue(string.Empty, parm); //for (int i = 0; i < p.Length; i++) // cmd.Parameters[i].Value = p[i]; } } public static DataSet ExecuteDataset(string cmdText, params object[] p) { DataSet ds = new DataSet(); SQLiteCommand command = new SQLiteCommand(); using (SQLiteConnection connection = GetSQLiteConnection()) { PrepareCommand(command, connection, cmdText, p); SQLiteDataAdapter da = new SQLiteDataAdapter(command); da.Fill(ds); } return ds; } public static DataRow ExecuteDataRow(string cmdText, params object[] p) { DataSet ds = ExecuteDataset(cmdText, p); if (ds != null && ds.Tables.Count > 0 && ds.Tables[0].Rows.Count > 0) return ds.Tables[0].Rows[0]; return null; } /// /// 返回受影响的行数 /// /// a /// 传入的参数 /// public static int ExecuteNonQuery(string cmdText, params object[] p) { SQLiteCommand command = new SQLiteCommand(); using (SQLiteConnection connection = GetSQLiteConnection()) { PrepareCommand(command, connection, cmdText, p); return command.ExecuteNonQuery(); } } /// /// 返回SqlDataReader对象 /// /// /// 传入的参数 /// public static SQLiteDataReader ExecuteReader(string cmdText, params object[] p) { SQLiteCommand command = new SQLiteCommand(); SQLiteConnection connection = GetSQLiteConnection(); try { PrepareCommand(command, connection, cmdText, p); SQLiteDataReader reader = command.ExecuteReader(CommandBehavior.CloseConnection); return reader; } catch { connection.Close(); throw; } } /// /// 返回结果集中的第一行第一列，忽略其他行或列 /// /// /// 传入的参数 /// public static object ExecuteScalar(string cmdText, params object[] p) { SQLiteCommand cmd = new SQLiteCommand(); using (SQLiteConnection connection = GetSQLiteConnection()) { PrepareCommand(cmd, connection, cmdText, p); return cmd.ExecuteScalar(); } } /// /// 分页 /// /// /// /// /// /// /// /// public static DataSet ExecutePager(ref int recordCount, int pageIndex, int pageSize, string cmdText, string countText, params object[] p) { if (recordCount < 0) recordCount = int.Parse(ExecuteScalar(countText, p).ToString()); DataSet ds = new DataSet(); SQLiteCommand command = new SQLiteCommand(); using (SQLiteConnection connection = GetSQLiteConnection()) { PrepareCommand(command, connection, cmdText, p); SQLiteDataAdapter da = new SQLiteDataAdapter(command); da.Fill(ds, (pageIndex - 1) * pageSize, pageSize, "result"); } return ds; } } } ...展开收缩
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