#region 创建文件夹  MakeFolder()

///

/// 创建文件夹

///

/// 例如:/newDir

/// ftp地址(可带目录)

/// ftp用户名

/// ftp密码

public void MakeFolder(string FolderName, string url, string userid, string password)

{

FtpWebRequest reqFTP;

try

{

reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + url + FolderName));

reqFTP.Method = WebRequestMethods.Ftp.MakeDirectory;

reqFTP.UseBinary = true;

reqFTP.Credentials = new NetworkCredential(userid, password);

FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();

Stream ftpStream = response.GetResponseStream();

ftpStream.Close();

response.Close();

}

catch (Exception ex)

{

throw new Exception("此处是创建文件夹:"+ex.Message + "创建文件夹:ftp://" + url + FolderName + "不成功!");

}

}

///

/// 生成缩略图

///

/// 数据流

/// 缩略图路径(ftp相对路径)

/// 缩略图宽度

/// 缩略图高度

/// 生成缩略图的方式

public void MakeThumbnail(Stream stream, string thumbnailPath, int width, int height, string mode)

{

System.Drawing.Image originalImage = System.Drawing.Image.FromStream(stream);

int towidth = width;

int toheight = height;

int x = 0;

int y = 0;

int ow = originalImage.Width;

int oh = originalImage.Height;

switch (mode)

{

case "HW"://指定高宽缩放(可能变形)

break;

case "W"://指定宽，高按比例

toheight = originalImage.Height * width / originalImage.Width;

break;

case "H"://指定高，宽按比例

towidth = originalImage.Width * height / originalImage.Height;

break;

case "Cut"://指定高宽裁减(不变形)

if ((double)originalImage.Width / (double)originalImage.Height > (double)towidth / (double)toheight)

{

oh = originalImage.Height;

ow = originalImage.Height * towidth / toheight;

y = 0;

x = (originalImage.Width - ow) / 2;

}

else

{

ow = originalImage.Width;

oh = originalImage.Width * height / towidth;

x = 0;

y = (originalImage.Height - oh) / 2;

}

break;

default:

break;

}

//新建一个bmp图片

System.Drawing.Image bitmap = new System.Drawing.Bitmap(towidth, toheight);

//新建一个画板

Graphics g = System.Drawing.Graphics.FromImage(bitmap);

//设置高质量插值法

g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;

//设置高质量,低速度呈现平滑程度

g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;

//清空画布并以透明背景色填充

g.Clear(Color.Transparent);

//在指定位置并且按指定大小绘制原图片的指定部分

g.DrawImage(originalImage, new Rectangle(0, 0, towidth, toheight),

new Rectangle(x, y, ow, oh),

GraphicsUnit.Pixel);

try

{

MemoryStream temp = new MemoryStream();

bitmap.Save(temp, System.Drawing.Imaging.ImageFormat.Jpeg);

temp.Position = 0;

UploadFileByFTP(this.ftpHost, this.ftpUserId, this.ftpPwd, temp, thumbnailPath);

}

catch (System.Exception e)

{

throw new Exception("此处是生成缩略图:"+e.Message+"生成缩略图失败!");

}

finally

{

originalImage.Dispose();

bitmap.Dispose();

g.Dispose();

}

}

#region FTP上传文件方法，设定ftp下的保存路径，文件名  UploadFileByFTP()

///

/// FTP上传文件方法，设定ftp下的保存路径，文件名

///

/// ftp地址

/// ftp用户名

/// ftp密码

/// 上传文件流

/// 文件名(可带相对路径)

/// throw

protected void UploadFileByFTP(string ftpServerIP, string ftpUserID, string ftpPassword, Stream streamRead, string filename)

{

string l_notice = "";//上传提示

string uri = string.Empty;

//如果filename为空提示选择文件

if (filename == null || filename == "")

{

l_notice = "Please select File ！";

}

else

{

try

{

if (filename.StartsWith("/"))

{

filename = filename.Remove(0, 1);

}

uri = "ftp://" + ftpServerIP + "/" + filename;

FtpWebRequest reqFTP;

// 根据uri创建FtpWebRequest对象

reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));

// ftp用户名和密码

reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);

// 默认为true，连接不会被关闭

// 在一个命令之后被执行

reqFTP.KeepAlive = false;

// 指定执行命令

reqFTP.Method = WebRequestMethods.Ftp.UploadFile;

// 指定数据传输类型

reqFTP.UseBinary = true;

// 上传文件时通知服务器文件的大小

reqFTP.ContentLength = streamRead.Length;

// 缓冲大小设置为5kb

int buffLength = 5048;

byte[] buff = new byte[buffLength];

int contentLen;

Stream streamWrite = reqFTP.GetRequestStream();

streamRead.Flush();

contentLen = streamRead.Read(buff, 0, buffLength);

while (contentLen != 0)

{

streamWrite.Write(buff, 0, contentLen);

contentLen = streamRead.Read(buff, 0, buffLength);

}

// 关闭两个流

streamWrite.Close();

}

catch (Exception ex)

{

throw new Exception("此处是上传方法:"+ex.Message + "ftp路径:" + uri);

}

}

Response.Write(l_notice);

}