存读Blob Oracle

using System;
using System.Collections.Generic;
using
System.ComponentModel;
using System.Data;
using System.Drawing;
using
System.Linq;
using System.Text;
using System.Threading.Tasks;
using
System.Windows.Forms;
using System.Data.OracleClient;
using
System.IO;

namespace TestOraclBlob
{
    public
partial class Form1 : Form
   
{
        OracleConnection
conn;
        public
Form1()
       
{
           
InitializeComponent();
           
string strCon = "Data Source=orcl;Persist Security Info=True;User
ID=wcq;Password=wcq123;Unicode=True;";
           
conn = new
OracleConnection(strCon);
       
}
       
//写入数据库
        private void
button1_Click(object sender, EventArgs
e)
       
{
           
OracleCommand cmd = new OracleCommand("",
conn);

           
string path =
@"C:\Users\lenovo\Desktop\01.pdf";
           
FileStream fs = new FileStream(path, FileMode.Open,
FileAccess.Read);
           
Byte[] fsByte = new byte[fs.Length]; //把图片转成 Byte型 二进制流
 
           
fs.Read(fsByte, 0, fsByte.Length);   //把二进制流读入缓冲区 
 
           
fs.Close();

           
cmd.CommandText = "insert into Student(id,name,storeblob)
values(1,‘aa‘,:zp)";
           
cmd.Parameters.Add(":zp", OracleType.BFile,
fsByte.Length);
           
cmd.Parameters[0].Value =
fsByte;

           
conn.Open();
           
cmd.ExecuteNonQuery();

           
MessageBox.Show("插入成功！");
           
conn.Close();
       
}

        private void
button2_Click(object sender, EventArgs
e)
       
{
            string
path =
@"C:\Users\lenovo\Desktop\2.pdf";

           
DataTable dt = new
DataTable();
           
OracleDataAdapter adapter = new OracleDataAdapter("select storeBlob from
student",
conn);

           
adapter.Fill(dt);
           
Byte[] filebyte =
(byte[])(dt.Rows[1][0]);

           
FileStream fs = new FileStream(path,
FileMode.Create);

           
fs.Write(filebyte, 0,
filebyte.GetLength(0));

           
fs.Close();

           
MessageBox.Show("读取成功！");
       
}
    }

}

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