将图片的二进制文件存入xml文件。

string imageFileName = @"C:\pic\lilies.jpg";

try
{
XmlTextWriter writer;
string strFilename = Server.MapPath("data1.xml") ;
writer = new XmlTextWriter(strFilename,Encoding.Default);

//Start writing the XML document
writer.Formatting = Formatting.Indented;
writer.WriteStartDocument();
writer.WriteStartElement("employee");
writer.WriteStartElement("image");

//Get the size of the file
FileInfo fi = new FileInfo(imageFileName);
int size = (int)fi.Length;

//Read the JPEG file
byte[] imgs = new byte[size];
FileStream fs = new FileStream(imageFileName,FileMode.Open);
BinaryReader reader = new BinaryReader(fs);
imgs = reader.ReadBytes(size);
reader.Close();

writer.WriteBase64(imgs, 0, size);

writer.WriteEndElement();
writer.WriteEndElement();
writer.WriteEndDocument();

writer.Flush();
}
catch (Exception ex)
{
throw ex;
}

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

读取二进制文件从xml文件。

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

　string file = @"D:\UploadImage\abc.gif";

XmlDocument doc = new XmlDocument();
doc.Load(Server.MapPath("data1.xml"));
byte[] Img = Convert.FromBase64String(doc.SelectSingleNode("/employee/image").InnerText);

MemoryStream ms = new MemoryStream(Img);
Bitmap b = (Bitmap)System.Drawing.Image.FromStream(ms);
b.Save(file,System.Drawing.Imaging.ImageFormat.Gif);

#region 另一种方法创建文件
int length = Img.Length;
FileStream fs = new FileStream(file, FileMode.Create, FileAccess.Write);
fs.Write(Img, 0, length);
fs.Flush();
fs.Close();
#endregion