软件启动界面检测是否有网络连接
form1，启动界面。若检测到有网络连接，直接跳转到from2
若检测到无网络连接，跳转到from3
谢谢。 --------------------编程问答--------------------
Declare Function InternetGetConnectedState Lib "wininet.dll" (ByRef lpdwFlags As Long, ByVal dwReserved As Long) As Long--------------------编程问答-------------------- 不懂，wininet.dll 是什么？ --------------------编程问答--------------------
· lpdwFlags
[out] Pointer to an unsigned long integer variable where the connection description should be returned. This can be a combination of the following values:
INTERNET_CONNECTION_CONFIGURED Local system has a valid connection to the Internet, but it may or may not be currently connected.
INTERNET_CONNECTION_LAN Local system uses a local area network to connect to the Internet.
INTERNET_CONNECTION_MODEM Local system uses a modem to connect to the Internet.
INTERNET_CONNECTION_MODEM_BUSY No longer used.
INTERNET_CONNECTION_OFFLINE Local system is in offline mode.
INTERNET_CONNECTION_PROXY Local system uses a proxy server to connect to the Internet.
INTERNET_RAS_INSTALLED Local system has RAS installed.
· dwReserved
[in] Reserved. Must be set to zero.
Returns TRUE if there is an Internet connection, or FALSE otherwise.
这个api貌似不准 --------------------编程问答-------------------- 谁有更好的办法呢？ --------------------编程问答-------------------- Private Sub InetLogin_StateChanged(ByVal State As Integer) If State = icResponseCompleted Then Dim StrIn As String StrIn = InetLogin.GetChunk(0, icString) If StrIn = "ok" Then '登陆成功 您可在此添加 登陆成功后的动作me.hideform2.show MsgBox "登陆成功,您可以在此添加登陆成功后的动作", vbInformation Else MsgBox StrIn, vbInformation, "登录失败" End If ElseIf State = icError Then MsgBox "网络连接错误" End IfEnd Sub
这个代码我加入后，最后一个 End IfEnd Sub提示错误，我不知道哪里修改？
我想换成若检测不到连接，跳转到form3 。 --------------------编程问答--------------------
Private Declare Function InternetCheckConnection Lib "wininet.dll" Alias "InternetCheckConnectionA" (ByVal lpszUrl As String, ByVal dwFlags As Long, ByVal dwReserved As Long) As Long
Public Function isConnectInet()
isConnectInet = (InternetCheckConnection("http://www.baidu.com", &H1, 0&) <> 0)
End Function
我用的这个方法检测网络是否连接的，挺准 --------------------编程问答--------------------
我要的效果是 网络存在，立即跳转到FORM2，检测不到网络跳转到 FORM3 --------------------编程问答--------------------
那你就在定时器中检查，每隔1秒钟检查一次、 --------------------编程问答-------------------- 不会啊，求易做图兄 --------------------编程问答--------------------
--------------------编程问答--------------------
Private Declare Function InternetCheckConnection Lib "wininet.dll" Alias "InternetCheckConnectionA" (ByVal lpszUrl As String, ByVal dwFlags As Long, ByVal dwReserved As Long) As Long
Public Function isConnectInet()
isConnectInet = (InternetCheckConnection("http://www.baidu.com", &H1, 0&) <> 0)
End Function
Private Sub Form_Load()
If (InternetCheckConnection("http://www.baidu.com", &H1, 0&) <> 0) Then
Form2.Show
Else
Form3.Show
End If
End Sub
简单测试了一下，开搞timer不断检测，然后断开网络，qq,旺旺立刻就离线了，可函数依然提示true .... --------------------编程问答--------------------
这种效果是ok的，可是问题是如果无网络，启动软件会很慢，，这个可能解决掉？ --------------------编程问答--------------------
怎么跳转到form2，或者form3的时候自动关闭form1 --------------------编程问答--------------------
Private Declare Function InternetCheckConnection Lib "wininet.dll" Alias "InternetCheckConnectionA" (ByVal lpszUrl As String, ByVal dwFlags As Long, ByVal dwReserved As Long) As Long--------------------编程问答-------------------- 获得本地IP,是127.0.0.1则没有连接。
Public Function isConnectInet()
isConnectInet = (InternetCheckConnection("http://www.baidu.com", &H1, 0&) <> 0)
End Function
Private Sub Form_Load()
If (InternetCheckConnection("http://www.baidu.com", &H1, 0&) <> 0) Then
Unload Me
Form2.Show
Else
Unload Me
Form3.Show
End If
End Sub
补充：VB , 基础类
