vb.net上传文件到服务器,vb.net上传文件到FTP服务器

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vb.net上传文件到服务器,vb.net上传文件到FTP服务器

上传文件到ftp服务器整理：

声明：以下代码为vb.net代码，使用Visual Studio 2008开发，所有代码均通过测试，可以直接使用。欢迎转载，请注明出处，欢迎拍砖。

web.config 文件配置，将用户名，密码和ftp服务器的地址存放到web.config文件：

文件上传步骤：

1.读取文件到一个FileStream

2.设置ftp服务器访问信息，主要是ftp服务器地址，访问ftp服务器的用户名和密码，访问类型，等待时间等待。

3.在ftp服务器中创建一个空的文件

3.将源文件读取到byte()数组中

4.将byte()数组中存放的数据写入到另外一个Stream, 这个stream是我们刚在ftp服务器上创建的空文件

5.完成写入

以下是文件上传代码：

'''

''' upload txt file to specified destination.

'''

Private Sub uploadFileByFTP()

'is uploaded

Dim isUploaded As Boolean = False

'File path

Dim fi As New FileInfo(Server.MapPath(".").ToString & "\TestFileFolder\" & strFileName)

'Create a file in the ftp file server

Dim reqObj As System.Net.FtpWebRequest

reqObj = DirectCast(System.Net.WebRequest.Create(ConfigurationManager.AppSettings("CompleteFTPPath") & fi.Name), System.Net.FtpWebRequest)

'Configure the request methods as uploadfile

With reqObj

.Credentials = New Net.NetworkCredential(ConfigurationManager.AppSettings("UserName"), ConfigurationManager.AppSettings("PassWord"))

.Method = WebRequestMethods.Ftp.UploadFile

.UseBinary = True

.ContentLength = fi.Length

.Timeout = 10 * 1000

End With

Try

Using fsSource As FileStream = New FileStream(Server.MapPath(".").ToString & "\NameplateFile\" & strFileName, FileMode.Open, FileAccess.Read)

' Read the source file into a byte array.

Dim bytes() As Byte = New Byte((fsSource.Length) - 1) {}

' Get the length of the source file

Dim numBytesToRead As Integer = CType(fsSource.Length, Integer)

Dim numBytesRead As Integer = 0

While (numBytesToRead > 0)

' Read may return anything from 0 to numBytesToRead.

Dim n As Integer = fsSource.Read(bytes, numBytesRead, _

numBytesToRead)

' Break when the end of the file is reached.

If (n = 0) Then

Exit While

End If

numBytesRead = (numBytesRead + n)

numBytesToRead = (numBytesToRead - n)

End While

numBytesToRead = bytes.Length

' Write the byte array to the ftp file server

Using fsNew As System.IO.Stream = reqObj.GetRequestStream()

fsNew.Write(bytes, 0, numBytesToRead)

isUploaded = True

End Using

' upload successfully

File.Delete(Server.MapPath(".").ToString & "\TestFileFolder\" & strFileName)

If isUploaded = True Then

lblMsg.Text = "File uploaded successfully!"

Else

lblMsg.Text = ""

End If

Catch ex As Exception

Throw ex

End Try

End Sub

以上是一个简单的上传文件的代码，仅供参考。