程序代码：

 private void 保存图片_Click(object sender, EventArgs e)
        {


             OpenFileDialog ofd = new OpenFileDialog();                //new一个方法
            ofd.InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);  //定义打开的默认文件夹位置
            ofd.ShowDialog();          //显示打开文件的窗口
            fileNamePth = ofd.FileName;               //获得选择的文件路径
            textBox1.Text = fileNamePth;
            extendedName = Path.GetExtension(fileNamePth);       //获得文件扩展名
            fileName1 = Path.GetFileName(fileNamePth);           //获得文件名，其实它还包括了扩展名.
            fileName1 = fileName1.Substring(0,fileName1 .Length-4);//截取它的文件名
          
            string cnnstr = "provider=OraOLEDB.Oracle;data source=NJGIS;User Id=sde;Password=gis;";
            OleDbConnection con = new OleDbConnection(cnnstr);
            try
            {
                con.Open();
            }
            catch
            { }

            OleDbCommand cmd = new OleDbCommand(cnnstr, con);

             = CommandType.Text;
             = cnnstr;
            //for (int i=0; i < openFileDialog1.FileNames.Length; i++)
            //{
                FileStream file = new FileStream(fileNamePth, FileMode.Open, FileAccess.Read);
                Byte[] imgByte = new Byte[file.Length];//把图片转成1Byte型二进制流 
                file.Read(imgByte, 0, imgByte.Length);//把二进制流读入缓冲区  

                 = " insert into picture ( id,picda ) values (:id,:picda) ";//正常sql语句插入数据库 
                cmd.Parameters.Add("id", fileName1);
                cmd.Parameters.Add("picda", System.Data.OleDb.OleDbType.Binary, imgByte.Length);

                cmd.Parameters[1].Value = imgByte;
                file.Close();

            //}
          
            try
            {
                cmd.ExecuteNonQuery();
                MessageBox.Show("导入成功");
            }
            catch (System.Exception e1)
            {
                MessageBox.Show("插入错误" + e1);
            }
        }