C#访问SQLite数据库，

C#访问SQLite数据库，

一,引用System.Data.SQLite.dll类库

1，百度云下载连接：http://pan.baidu.com/s/1c1Ozndm
2，项目引用此文件。

二,SQLiteHelp辅助类

using System.Data;
using System.Data.SQLite;

namespace Sqlite
{
    public class SQLiteHelper
    {
        public SQLiteConnection conn;

        public SQLiteHelper(string connStr)
        {
            conn = new SQLiteConnection(connStr);
        }

        public SQLiteHelper()
        {
            [conn=...;]
        }
        public DataSet Query(string sql, params SQLiteParameter[] parameters)
        {
            DataSet ds = new DataSet();
            using (conn)
            {
                using (SQLiteCommand comm = new SQLiteCommand(sql, conn))
                {
                    if (parameters != null)
                    {
                        comm.Parameters.AddRange(parameters);
                    }
                    using (SQLiteDataAdapter da = new SQLiteDataAdapter(comm))
                    {
                        da.Fill(ds);
                    }
                }
            }
            return ds;
        }
        public bool ExcuteNonQuery(string sql, params SQLiteParameter[] parameters)
        {
            int row;
            using (conn)
            {
                conn.Open();
                using (SQLiteTransaction transaction = conn.BeginTransaction())
                {
                    using (SQLiteCommand comm = new SQLiteCommand(sql, conn))
                    {
                        if (parameters != null)
                        {
                            comm.Parameters.AddRange(parameters);
                        }
                        row = comm.ExecuteNonQuery();
                    }
                    transaction.Commit();
                }
            }
            return row > 0;
        }

        public SQLiteDataReader ExcuteDataReader(string sql, params SQLiteParameter[] parameters)
        {
            using (SQLiteCommand comm = new SQLiteCommand(sql, conn))
            {
                if (parameters != null)
                {
                    comm.Parameters.AddRange(parameters);
                }
                conn.Open();
                return comm.ExecuteReader(CommandBehavior.CloseConnection);
            }
        }


    }
}