让Sqlite3以GB2312编码存储汉字

Sqlite3内部采用UTF8存储，但是为转成GB2312就必须调用编码函数，太麻烦了，于是今天琢磨出一种让sqlite3内部存储汉字采用GB2312的方法，将字段设为BLOB，然后保存汉字的GB2312编码的字节数组就OK了。但是把词库的所有字段从TEXT转换成BLOB,结果查询时用where word = ’hello’竟然无法查询出结果,随手改成where word like ’hello’竟然可以,估计是BLOB无法用”=”查询。

using System;
using System.Text;
using System.Data;
using Finisar.SQLite;


namespace SqliteConvert
{
    /// <summary>
    /// Class1 的摘要说明。
    /// </summary>
    class Class1
    {
        /// <summary>
        /// 应用程序的主入口点。
        /// </summary>
        [STAThread]
        static void Main(string[] args)
        {
            //
            // TODO: 在此处添加代码以启动应用程序
            //




            //打开以前的库
            SQLiteConnection sqliteConn = new SQLiteConnection(@"Data Source=d:projectDrEye.db;New=False;Compress=True;Version=3;");
            sqliteConn.Open();
            SQLiteDataAdapter sqliteDa = new SQLiteDataAdapter("select * from DrEye",sqliteConn);
            DataSet sqliteDs = new DataSet();
            sqliteDa.Fill(sqliteDs);




            //创建新库
            SQLiteConnection sqliteConnNew = new SQLiteConnection(@"Data Source=d:projectDrEye.new1.db;New=True;Compress=True;Version=3");
            sqliteConnNew.Open();


            //建表
            SQLiteCommand sqliteCmdNew = sqliteConnNew.CreateCommand();
            sqliteCmdNew.CommandText = "CREATE table DrEye (word TEXT Primary Key,explanation BLOB,InflectedForm BLOB)";
            sqliteCmdNew.ExecuteNonQuery();


            //插入数据
            SQLiteDataAdapter sqliteDaNew = new SQLiteDataAdapter("select * from DrEye", sqliteConnNew);
            SQLiteCommandBuilder sqliteCbNew = new SQLiteCommandBuilder(sqliteDaNew);


            DataSet sqliteDsNew = new DataSet();
            sqliteDaNew.Fill(sqliteDsNew);


            Console.WriteLine(sqliteDs.Tables[0].Rows.Count);
            Console.WriteLine(sqliteDsNew.Tables[0].Rows.Count);


            foreach(DataRow dr in sqliteDs.Tables[0].Rows)
            {




                DataRow sqliteDrNew = sqliteDsNew.Tables[0].NewRow();
                sqliteDrNew[0] = dr[0];
                sqliteDrNew[1] = EncodingConvert(dr[1].ToString());
                if (dr[2].ToString() != "")
                {
                    sqliteDrNew[2] = EncodingConvert(dr[2].ToString());
                }
                sqliteDsNew.Tables[0].Rows.Add(sqliteDrNew);
                break;
            }
            sqliteDaNew.Update(sqliteDsNew);




            Console.WriteLine("Game over!");
            Console.ReadLine();
        }


        //将字符串转换成字节
        static byte[] EncodingConvert(string utf8String)
        {


            byte[] ansiCode;
            ansiCode = Encoding.Default.GetBytes(utf8String);
            return ansiCode;
        }
    }
}

 

用这个连接串存储中文

SQLiteConnection conn = new SQLiteConnection();
conn.ConnectionString = "Data Source=test1.db;New=False;Compress=True;Synchronous=Off;UTF8Encoding=True;Version=3";