目录:
代码,参考资料,IIS环境FTP配置,vs2013 IIS Express虚拟目录
1. 项目介绍
建立FTP文件服务器与应用程序分开(猜测提高IIS性能) .
下面方法中的参数为Stream因为使用的是fineUI,已经将流上传,如果是其他控件,后面有FileStream,Bitmap,byte[]之间的参考资料.
2.测试代码
/// <summary>
/// Bitmap:封装 GDI+ 包含图形图像和其属性的像素数据的位图。 一个 Bitmap 是用来处理图像像素数据所定义的对象。
/// 难点:
/// 1.Stream转Bitmap,压缩图片
/// 2.Bitmap 与 byte[] 转换 (Bitmap转MemoryStream,再通过ms.ToArray()转byte[])
/// 3.创建FTP上载数据流,写入字节数(FTP服务器分IIS级别配置,和应用程序级别配置,两个要一致.安全级别高的使用指定用户,安全低的可以所以用户)
///
/// </summary>
/// <param name="stream">继承抽象类的实例(一般是FileStream,MemoryStream)</param>
/// <param name="url">FTP地址</param>
/// <param name="filename">服务器中的文件名(ftp://192.168.1.127/190_140/636288137130851325admin_Penguins.jpg)</param>
public void SaveStream(Stream stream,string url,string filename)
{
MemoryStream ms = null;
Stream strm = null;
try
{
/// 1.Stream 转成 Bitmap 并压缩图片
Bitmap pimage = new Bitmap(stream);
System.Drawing.Imaging.ImageFormat fromat = pimage.RawFormat;
Bitmap bitNewPic = new Bitmap(pimage, 190, 140);
/// 2.Bitmap 转成MemoryStream(继承Stream抽象类)
ms = new MemoryStream();
bitNewPic.Save(ms, fromat);
/// 3.MemoryStream转成byte[]数组 "imagebyte"
byte[] imagebyte = new Byte[ms.Length];
imagebyte = ms.ToArray();
/// 4.创建FTP服务器连接 "reqFTP"
string uri = filename;
FtpWebRequest reqFTP;
reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
reqFTP.Credentials = new NetworkCredential("administrator", "vtlongxing");
reqFTP.KeepAlive = false;
reqFTP.Method = WebRequestMethods.Ftp.UploadFile;
reqFTP.UseBinary = true;
reqFTP.ContentLength = imagebyte.Length;
/// 5.创建FTP服务器上载数据的流 "strm",并向"strm"写入字节序列
strm = reqFTP.GetRequestStream();
strm.Write(imagebyte, 0, imagebyte.Length);
}
catch (Exception ex)
{
}
finally
{
/// 6.关闭各"流"
strm.Close();
ms.Close();
stream.Close();
}
}
3.filestream,bety,Bitmap操作参考
http://blog.csdn.net/wangyue4/article/details/6819102
using System;
using System.Collections.Generic;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Web;
namespace AppBox.CRM.Gift
{
public class ImageHelper
{
//byte[] 转图片
public static Bitmap BytesToBitmap(byte[] Bytes)
{
MemoryStream stream = null;
try
{
stream = new MemoryStream(Bytes);
return new Bitmap((Image)new Bitmap(stream));
}
catch (ArgumentNullException ex)
{
throw ex;
}
catch (ArgumentException ex)
{
throw ex;
}
finally
{
stream.Close();
}
}
//图片转byte[]
public static byte[] BitmapToBytes(Bitmap Bitmap)
{
MemoryStream ms = null;
try
{
ms = new MemoryStream();
Bitmap.Save(ms, Bitmap.RawFormat);
byte[] byteImage = new Byte[ms.Length];
byteImage = ms.ToArray();
return byteImage;
}
catch (ArgumentNullException ex)
{
throw ex;
}
finally
{
ms.Close();
}
}
/// <summary>
/// 将 Stream 转成 byte[]
/// </summary>
public byte[] StreamToBytes(Stream stream)
{
byte[] bytes = new byte[stream.Length];
stream.Read(bytes, 0, bytes.Length);
// 设置当前流的位置为流的开始
stream.Seek(0, SeekOrigin.Begin);
return bytes;
}
/// <summary>
/// 将 byte[] 转成 Stream
/// </summary>
public Stream BytesToStream(byte[] bytes)
{
Stream stream = new MemoryStream(bytes);
return stream;
}
/* - - - - - - - - - - - - - - - - - - - - - - - -
* Stream 和 文件之间的转换
* - - - - - - - - - - - - - - - - - - - - - - - */
/// <summary>
/// 将 Stream 写入文件
/// </summary>
public void StreamToFile(Stream stream, string fileName)
{
// 把 Stream 转换成 byte[]
byte[] bytes = new byte[stream.Length];
stream.Read(bytes, 0, bytes.Length);
// 设置当前流的位置为流的开始
stream.Seek(0, SeekOrigin.Begin);
// 把 byte[] 写入文件
FileStream fs = new FileStream(fileName, FileMode.Create);
BinaryWriter bw = new BinaryWriter(fs);
bw.Write(bytes);
bw.Close();
fs.Close();
}
/// <summary>
/// 从文件读取 Stream
/// </summary>
public Stream FileToStream(string fileName)
{
// 打开文件
FileStream fileStream = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.Read);
// 读取文件的 byte[]
byte[] bytes = new byte[fileStream.Length];
fileStream.Read(bytes, 0, bytes.Length);
fileStream.Close();
// 把 byte[] 转换成 Stream
Stream stream = new MemoryStream(bytes);
return stream;
}
}
}
4.IIS下FTP配置
(FTP服务器分IIS级别配置,和应用程序级别配置,两个要一致.安全级别高的使用指定用户,安全低的可以所以用户)
http://www.juheweb.com/Tutorials/fwq/windows/335.html
5.虚拟目录 (使用虚拟目录和相对路径要用Server.MapPath())
// <virtualDirectory path="/VImage/" physicalPath="D:\Uploadfile\CRM\Image" /> iis express 配置虚拟目录
string strImagePathV = "~/upimage/";//虚拟目录
string strImagePath190_140V = "~/upimage/190_140/";//虚拟目录
string strPath = Server.MapPath(strImagePathV + fileName);
string strPathchange = Server.MapPath(strImagePath190_140V + fileName);
UploadImage img = new UploadImage();
img.Save(tab1UploadImage.PostedFile.InputStream, strPathchange);
public class UploadImage
{
public bool Save(Stream stream, string imagename)
{
try
{
Bitmap pimage = new Bitmap(stream);
Bitmap bitNewPic = new Bitmap(pimage, 190, 140);
bitNewPic.Save(imagename, System.Drawing.Imaging.ImageFormat.Jpeg);
return true;
}
catch (Exception ex)
{
return false;
}
}
}
时间： 2024-10-05 03:02:08