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MVC Use FTP Server Show imge

: MVC FTP Csharp

首先上傳圖片有兩種方式 使用FtpWebRequest方式做上傳動作

  1. Use FtpWebRequest

建立 FTP 所需 class

FtpSettings _ftpsettings;
private struct FtpSettings
{
//存放 fpt網址
public string Server { get; set; }
//帳號
public string UserName { get; set; }
//密碼
public string Password { get; set; }
//檔案名字
public string FileName { get; set; }
};

找到 路徑以及檔案 假路徑檔案的資料(因為在上傳時會先製造假路徑在使用者電腦等到真正送出才上傳到FTP Server)

string pathCombieName = Path.Combine(fakenamepath, model.NewFileName);

取得檔案名稱 真實名.jpg檔

model.NewFileName = string.Format("{0}{1}", cn, Path.GetExtension(model.NewFileName));

取得FTP 相關設定

_ftpsettings.FileName = model.NewFileName;
_ftpsettings.Password = UserPassword;
_ftpsettings.Server = ServerName;
_ftpsettings.UserName =UserName;

使用WebClient 三行完成

using (WebClient client = new WebClient())
{
  client.Credentials = new NetworkCredential(_ftpsettings.UserName, _ftpsettings.Password);
  client.UploadFile(new Uri(string.Format("{0}/{1}", _ftpsettings.Server, _ftpsettings.FileName)), "STOR",pathCombieName);
}

使用 FtpWebRequest 好幾行完成 開始建立 FTP連接資訊

FtpWebRequest request = (FtpWebRequest)WebRequest.Create(new Uri(string.Format("{0}/{1}", _ftpsettings.Server, _ftpsettings.FileName)));

上傳方式 使用檔案

request.Method = WebRequestMethods.Ftp.UploadFile;

上傳檔案密碼

request.Credentials = new NetworkCredential(_ftpsettings.UserName, _ftpsettings.Password);

讀取 假目錄的檔案

using (FileStream istreamread = new FileStream(pathCombieName, FileMode.Open, FileAccess.Read, FileShare.Read))
{
//轉byte
byte[] imgbyte = new byte[istreamread.Length];
istreamread.Read(imgbyte, 0, imgbyte.Length - 1);
request.ContentLength = imgbyte.Length;
Stream filestream = request.GetRequestStream();
for (int i = 0; i < imgbyte.Length; i++)
{
    filestream.WriteByte(imgbyte[i]);
}

將資料流關掉否則等等無法刪除該資料夾

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

問題代碼 response.StatusDescription

ActionLogHelper.LogAction<Model>(0, 0, response.StatusDescription);
response.Close();
istreamread.Dispose();
istreamread.Close();
filestream.Dispose();
filestream.Close();
}

刪除假檔案目錄所有的資料

Directory.Delete(fakenamepath, true);

可以這樣接 是上傳檔案發生錯誤

catch (WebException ex)
{
//上傳檔案發生錯誤
model.message = ((FtpWebResponse)ex.Response).StatusDescription;
return model;
}

來源 使用WebClient 做顯示圖 或下載等等項目

byte[] imgbyte = new byte[0];
using (WebClient client = new WebClient())
{
client.Credentials = new NetworkCredential(_ftpsettings.UserName, _ftpsettings.Password);
client.DownloadData(new Uri(string.Format("{0}/{1}", _ftpsettings.Server, _ftpsettings.FileName)));
byte[] imageBytes = client.DownloadData(new Uri(string.Format("{0}/{1}", _ftpsettings.Server, _ftpsettings.FileName)));
imgbyte = imageBytes;
ontext.Response.Buffer = true;
context.Response.Charset = "";
context.Response.Cache.SetCacheability(HttpCacheability.NoCache);
context.Response.ContentType = "image/png";
context.Response.AddHeader("content-disposition", "attachment;filename=Image.png");
context.Response.BinaryWrite(imgbyte);
}
return imgbyte;
//前端 Controller
byte[] result = new byte[0];
result = listInfoSetings.GetUsersFTPImages(pic, HttpContext);
if (result.Length == 0)
{
//do error something
}
return File(result, "image/jpeg");

參考資源

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