利用FtpWebRequest 类实现上传文件到FTP-技术开发专区

利用FtpWebRequest 类实现上传文件到FTP

作者：ITPUB论坛编辑： nancy 2008-03-21 11:08

【IT168技术文档】

利用 FtpWebRequest 类实现上传文件到FTP. 先在本机建一个FTP站点,建在别的机器上也行.....
将 Ftp 的地址和帐号和密码等相关信息写在 Web.config , 方便管理 , 这里利用 FileUpload 的 FileContent 属性 , 将文件流写到FTP服务器.
通过一个枚举来记录文件存储方式

enum FileUpLoadMethod
{
file = 1 ,
ftp = 2
}

下面重要的是利用 FtpWebRequest 类实现和FTP服务器的通讯.

FtpWebRequest request;
try
{
request = ( FtpWebRequest )WebRequest.Create( GetUri( server , port , path , "FTP" ) );
}
catch
{
backMsg = "创建FTP请求失败";
return false;
}
request.Method = WebRequestMethods.Ftp.UploadFile;
if( isAnoymous )
{
request.Credentials = new NetworkCredential( "anonymous" , userEmail );
}
else if( !string.IsNullOrEmpty( domain ) )
{
request.Credentials = new NetworkCredential( username , password , domain );
}
else
{
request.Credentials = new NetworkCredential( username , password );
}

建立好 FtpWebRequest 对象后 , 剩下的事情就是将文件流写入FTP服务器了

Stream requestStream = null;
bool success = false;
request.ContentLength = inputStream.Length;
try
{
requestStream = request.GetRequestStream( );
success = true;
}
catch( Exception ex )
{
success = false;
if( ex is WebException )
{
WebException wex = ex as WebException;
if( ( ( FtpWebResponse )wex.Response ).StatusCode == FtpStatusCode.ActionNotTakenFileUnavailable )
backMsg = string.Format( "指定的文件路径不存在,错误如下：\n\t{0}" , ex.Message );
}
else if( ex is ProtocolViolationException )
backMsg = string.Format( "Protocol wrong:\n{0}\n" , ex.Message );
else
backMsg = string.Format( "InvalidOperation:\n{0}\n" , ex.Message );
}
if( success )
{
try
{
int count = 0;
byte[ ] buffer = new byte[1024];
while( ( count = inputStream.Read( buffer , 0 , 1024 ) ) > 0 )
{
requestStream.Write( buffer , 0 , count );
}
}
catch( Exception ex )
{
success = false;
backMsg = string.Format( "Write UploadStream wrong:\n{0}" , ex.ToString( ) );
}
finally
{
requestStream.Close( );
requestStream.Dispose( );
}
}

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