20170920xlVBA_FTP_UpDownLoad_DownLoad

‘建立应用环境进程
Private Declare Function InternetOpen Lib "wininet.dll" Alias "InternetOpenA" (ByVal sAgent As String, ByVal lAccessType As Long, ByVal sProxyName As String, ByVal sProxyBypass As String, ByVal lFlags As Long) As Long
‘连接层，连接服务器
Private Declare Function InternetConnect Lib "wininet.dll" Alias "InternetConnectA" (ByVal hInternetSession As Long, ByVal sServerName As String, ByVal nServerPort As Integer, ByVal sUsername As String, ByVal sPassword As String, ByVal lService As Long, ByVal lFlags As Long, ByVal lContext As Long) As Long
‘切换目录
Private Declare Function FtpSetCurrentDirectory Lib "wininet.dll" Alias "FtpSetCurrentDirectoryA" (ByVal hFtpSession As Long, ByVal lpszDirectory As String) As Boolean
‘查找函数
Private Declare Function FtpFindFirstFile Lib "wininet.dll" Alias "FtpFindFirstFileA" (ByVal hFtpSession As Long, ByVal lpszSearchFile As String, lpFindFileData As WIN32_FIND_DATA, ByVal dwFlags As Long, ByVal dwContent As Long) As Long
Private Declare Function InternetFindNextFile Lib "wininet.dll" Alias "InternetFindNextFileA" (ByVal hFind As Long, lpvFindData As WIN32_FIND_DATA) As Long
‘查找数据结构
Private Type WIN32_FIND_DATA
    dwFileAttributes As Long
    ftCreationTime As Currency
    ftLastAccessTime As Currency
    ftLastWriteTime As Currency
    nFileSizeHigh As Long
    nFileSizeLow As Long
    dwReserved0 As Long
    dwReserved1 As Long
    cFileName As String * 260
    cAlternate As String * 14
End Type
‘下载函数
Private Declare Function FtpGetFile Lib "wininet.dll" Alias "FtpGetFileA" (ByVal hFtpSession As Long, ByVal lpszRemoteFile As String, ByVal lpszNewFile As String, ByVal fFailIfExists As Boolean, ByVal dwFlagsAndAttributes As Long, ByVal dwFlags As Long, ByVal dwContext As Long) As Boolean
‘上传文件
Private Declare Function FtpPutFile Lib "wininet.dll" Alias "FtpPutFileA" (ByVal hFtpSession As Long, ByVal lpszLocalFile As String, ByVal lpszRemoteFile As String, ByVal dwFlags As Long, ByVal dwContext As Long) As Boolean
‘断开链接
Private Declare Function InternetCloseHandle Lib "wininet.dll" (ByVal hInet As Long) As Integer
Public Function DownLoadFile() As Boolean
    ‘建立环境
    lngINet = InternetOpen("My Ftp", 1, vbNullString, vbNullString, 0)
    Debug.Print lngINet
    ‘链接服务器
    lngINetConn = InternetConnect(lngINet, host_url, 0, user_name, pass_word, 1, 0, 0)
    ‘Debug.Print lngINetConn
    If lngINetConn = 0 Then
        MsgBox "连接服务器失败！", vbInformation, "NextSeven"
        DownLoadFile = False
        GoTo FailTag1
    End If
    ‘切换目录
    cngdir = FtpSetCurrentDirectory(lngINetConn, root_folder & sub_folder)    ‘目录
    If cngdir = False Then
        MsgBox "切换目录失败！", vbInformation, "NextSeven"
        DownLoadFile = False
        GoTo FailTag1
    End If
    Debug.Print cngdir

    ‘查找首个文件
    Dim pData As WIN32_FIND_DATA
    Dim FileName As String
    FileName = remote_file
    lngHINet = FtpFindFirstFile(lngINetConn, FileName, pData, 0, 0)

    If lngHINet = 0 Then
        MsgBox "查找文件失败！", vbInformation, "NextSeven"
        DownLoadFile = False
        GoTo FailTag1
    End If

    strTemp = Left(pData.cFileName, InStr(1, pData.cFileName, String(1, 0), vbBinaryCompare) - 1)
    blnRc = FtpGetFile(lngINetConn, strTemp, local_file_path, 0, 0, 1, 0)
    If blnRc Then
        DownLoadFile = True
        Debug.Print "下载成功"
    Else
        Debug.Print "下载失败"
        DownLoadFile = False
    End If

FailTag1:
    InternetCloseHandle lngINetConn
FailTag2:
    InternetCloseHandle lngINet
End Function
Public Function UpLoadFile() As Boolean
    ‘建立环境
    lngINet = InternetOpen("My Ftp", 1, vbNullString, vbNullString, 0)
    Debug.Print lngINet
    ‘链接服务器
    lngINetConn = InternetConnect(lngINet, host_url, 0, user_name, pass_word, 1, 0, 0)
    ‘Debug.Print lngINetConn
    If lngINetConn = 0 Then
        MsgBox "连接服务器失败！", vbInformation, "NextSeven"
        UpLoadFile = False
        GoTo FailTag1
    End If
    ‘切换目录
    cngdir = FtpSetCurrentDirectory(lngINetConn, root_folder & sub_folder)    ‘目录
    If cngdir = False Then
        MsgBox "切换目录失败！", vbInformation, "NextSeven"
        UpLoadFile = False
        GoTo FailTag1
    End If
    Debug.Print cngdir

    ‘查找首个文件
    Dim pData As WIN32_FIND_DATA
    Dim FileName As String
    FileName = remote_file
    ‘上传文件
    blnRc = FtpPutFile(lngINetConn, local_file_path, FileName, 1, 0)
    If blnRc Then
        Debug.Print "上传成功"
        UpLoadFile = True
    Else
        Debug.Print "上传失败"
        UpLoadFile = False
    End If
    ‘断开
FailTag1:
    InternetCloseHandle lngINetConn
FailTag2:
    InternetCloseHandle lngINet
End Function