标签：web 之间 htm art virt ue4 raw return 相对
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; } } }
标签：web 之间 htm art virt ue4 raw return 相对
原文地址：http://www.cnblogs.com/chirs888888/p/6769019.html
