将图片转成二进制流

[cehuiwaangqi]

//打开文件
OpenFileDialog dlg = new OpenFileDialog();
dlg.Filter = "图片文件(*.jpg;*.bmp;*.png;*.gif)|*.jpg;*.bmp;*.png;*.gif";
if (dlg.ShowDialog() == DialogResult.OK)
{
FileInfo fileInfo = new FileInfo(dlg.FileName);
byte[] buffer = new byte[fileInfo.Length];
//using
FileStream stream = fileInfo.OpenRead();

stream.Read(buffer, 0, buffer.Length);

是不是这样写不对啊？

[Indifferent_Wind]

if (dlg.ShowDialog() == DialogResult.OK)
{
Stream s= openFileDialog1.OpenFile();
byte[] by = new byte[s.Length];
s.Read(by, 0, by.Length);
}

[Indifferent_Wind]

if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
Stream s= openFileDialog1.OpenFile();
byte[] by = new byte[s.Length];
s.Read(by, 0, by.Length);
}

[wnyxy001]

你那样写有什么错呢？

[qweeew]

FileStream fs = new FileStream(dlg.FileName, FileMode.Open, FileAccess.Read, FileShare.Read, 20480, true);
BinaryReader br = new BinaryReader(fs);
byte[] bytes = br.ReadBytes((int)fs.Length);

[lishanya1]

private SqlConnection conn=new SqlConnection();
private SqlCommand cmd=new SqlCommand();

1、插入数据库：
//初始化Connection对象
conn.ConnectionString=ConfigurationSettings.AppSettings["ConnectionString"];
conn.Open();
//初始化Command对象
cmd.Connection=conn;
cmd.CommandText="Insert into PICS(ID,PIC) values(1,@pic)";
//定义二进制数组
byte[] imagebyte=new byte[1048576];//大小为1MB
//定义文件流
FileStream imageStream=new FileStream(Server.MapPath("01.gif"),FileMode.Open,FileAccess.Read);
//通过文件流读取图片
imageStream.Read(imagebyte,0,1048576);
//给CommondText添加属性
cmd.Parameters.Add("@pic",SqlDbType.Image,(int)(imageStream.Length));
cmd.Parameters["@pic"].Value=imagebyte;
cmd.ExecuteNonQuery();
conn.Close();

[sdl2005lyx]

//将Image转换为byte[]
public byte[] ConvertImage(Image image)
{
FileStream fs=new FileStream("imagetemp",FileMode.Create,FileAccess.Write,FileShare.None);
BinaryFormatter bf = new BinaryFormatter();
bf.Serialize(fs,(object)image);
fs.Close();
fs=new FileStream("imagetemp",FileMode.Open,FileAccess.Read,FileShare.None);
byte[] bytes = new byte[fs.Length];
fs.Read(bytes,0,(int)fs.Length);
fs.Close();
return bytes;
}