图片插入读取数据库代码

private void button1_Click(object sender, System.EventArgs e)
{
string   str=@"C:\Documents and Settings\Administrator.SHUTUPANDCODE\桌面\图片\内页-1.jpg";
FileStream   file   =     new   FileStream(str,FileMode.Open,   FileAccess.Read);
Byte[]   bytBLOBData   =   new   Byte[file.Length];   
file.Read(bytBLOBData,   0,   bytBLOBData.Length);
file.Close();
OleDbCommand   olecommand=new   OleDbCommand("INSERT   INTO   tupian (jpeg)   values(?)",oleDbConnection1);
olecommand.Parameters.Add(new   OleDbParameter("jpeg",OleDbType.Binary,bytBLOBData.Length,ParameterDirection.Input,true,0,0,null,DataRowVersion.Default,bytBLOBData));
oleDbConnection1.Open();
olecommand.ExecuteScalar();
} private void button2_Click(object sender, System.EventArgs e)
{
OleDbCommand   olecommand=new   OleDbCommand("select * from tupian",oleDbConnection1);
oleDbConnection1.Open();
OleDbDataReader dr=olecommand.ExecuteReader();
dr.Read();
Byte[] byteBLOBData   =   (Byte[])((dr.GetValue(0)));
MemoryStream   stmBLOBData   =   new   MemoryStream(byteBLOBData);
pictureBox1.Image=Image.FromStream(stmBLOBData); }