自己封装的ASP.NET的SQLITE数据库的操作类

/*

 * 作者: 牛腩

 * 创建时间: 2010-1-20 10:43:14

 * Email: 164423073@qq.com

 * 说明: 对SQLite数据库的增删查改操作的封装类

 */





using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Data;

using System.Data.SQLite;

using System.Web.Configuration;

using System.Web;





namespace Niunan.Tg029.Hr.Utility

{

    public class SQLiteHelper

    {

        private SQLiteConnection conn = null;

        private SQLiteCommand cmd = null;

        private SQLiteDataReader sdr = null;





        public SQLiteHelper()

        {

           //string connStr = WebConfigurationManager.ConnectionStrings["connStr"].ToString();

            string connStr = "Data Source=" + HttpContext.Current.Server.MapPath("~/test/test.sqlite") ;

            conn = new SQLiteConnection(connStr);

        }





        /// <summary>创建Command对象

        /// 

        /// </summary>

        /// <param name="sql">SQL语句</param>

        public void CreateCommand(string sql) {

            conn.Open();

            cmd = new SQLiteCommand(sql, conn);        

        }





        /// <summary>添加参数

        /// 

        /// </summary>

        /// <param name="paramName">参数名称</param>

        /// <param name="value">值</param>

        public void AddParameter(string paramName,object value) {

            cmd.Parameters.Add(new SQLiteParameter(paramName,value));

        }





        /// <summary>执行不带参数的增删改SQL语句

        ///  

        /// </summary>

        /// <param name="cmdText">增删改SQL语句</param>

        /// <param name="ct">命令类型</param>

        /// <returns></returns>

        public bool ExecuteNonQuery()

        {

            int res;

            try

            {

                res = cmd.ExecuteNonQuery();

                if (res > 0)

                {

                    return true;

                }

            }

            catch (Exception ex)

            {

                throw ex;

            }

            finally

            {

                if (conn.State == ConnectionState.Open)

                {

                    conn.Close();

                }

            }

            return false;

        }





        /// <summary>执行查询SQL语句

        ///  

        /// </summary>

        /// <param name="cmdText">查询SQL语句</param>

        /// <returns></returns>

        public DataTable ExecuteQuery()

        {

            DataTable dt = new DataTable();

            using (sdr = cmd.ExecuteReader(CommandBehavior.CloseConnection))

            {

                dt.Load(sdr);

            }

            return dt;

        }





        /// <summary>返回查询SQL语句查询出的结果的第一行第一列的值

        /// 

        /// </summary>

        /// <returns></returns>

        public string ExecuteScalar()

        {

            string res = "";

            try

            {

                object obj = cmd.ExecuteScalar();

                if (obj != null)

                {

                    res = obj.ToString();

                }

            }

            catch (Exception ex)

            {

                throw ex;

            }

            finally

            {

                if (conn.State == ConnectionState.Open)

                {

                    conn.Close();

                }

            }

            return res;

        }





    }

} 

使用示例看附件吧，蛮简单的一个封装，特此记录，以备不时之需！！！
附件下载：http://niunan.net/download/sqlitetest.7z