怎么写二进制流进数据库

怎么把一个文本框里面的文本以二进制流写进数据库的．．． --------------------编程问答-------------------- http://topic.csdn.net/t/20020405/14/625197.html --------------------编程问答--------------------

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using System.Data.OleDb;

using System.IO;



namespace OleDbImageSample

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }



        private void Form1_Load(object sender, EventArgs e)

        {



        }



        private string strConn = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=D:\VisualStudioProject2010\Winform\OleDbImageSample\OleDbImageSample\DB\ImagesDB.mdb";



        private void button1_Click(object sender, EventArgs e)

        {

            if (openFileDialog1.ShowDialog() != System.Windows.Forms.DialogResult.OK)

                return;



            var file = openFileDialog1.FileName;



            try

            {

                using (var conn = new OleDbConnection(strConn))

                {

                    var comm = new OleDbCommand();

                    comm.Connection = conn;

                    comm.CommandText = "insert into images (FileName, Data) values (?, ?)";

                    var p1 = new OleDbParameter();

                    p1.DbType = DbType.String;

                    p1.Value = Path.GetFileName(file);

                    comm.Parameters.Add(p1);

                    var p2 = new OleDbParameter();

                    p2.DbType = DbType.Binary;

                    p2.Value = File.ReadAllBytes(file);

                    comm.Parameters.Add(p2);

                    

                    conn.Open();

                    comm.ExecuteNonQuery();

                    MessageBox.Show("Insert Successfully");



                    var adapter = new OleDbDataAdapter("select Id, FileName from images", conn);

                    var list = new DataTable();

                    adapter.Fill(list);

                    this.listBox1.DataSource = list;

                    this.listBox1.DisplayMember = "FileName";

                    this.listBox1.ValueMember = "Id";

                }

            }

            catch (Exception ex)

            {

                MessageBox.Show(ex.Message);

            }



        }



        private void button2_Click(object sender, EventArgs e)

        {

            if (listBox1.SelectedValue == null)

                return;

            var id = (int)listBox1.SelectedValue;

            var sql = "select data from images where id=" + id;

            using (var conn = new OleDbConnection(strConn))

            {

                var comm = new OleDbCommand();

                comm.CommandText = sql;

                comm.Connection = conn;

                conn.Open();

                var reader = comm.ExecuteReader();

                if (reader.Read())

                {

                    var data = (byte[])reader.GetValue(0);

                    using (var ms = new MemoryStream(data))

                        this.pictureBox1.Image = Image.FromStream(ms);

                }

            }

        }





    }

}

--------------------编程问答-------------------- System.Byte[] buffer = System.Text.Encoding.Default.GetBytes(str);
Encoding. 选择你的字符编码

补充：.NET技术 ,  C#