利用DotRAS组件,实现ADSL的自动拨号断网自动化操作
有些场合,为了避免服务对用户IP的限制或者为了用户的方便,可以通过代码实现自动化的拨号或者断网操作,通过DotRAS组件,可以非常方便的实现如ADSL、VPN等拨号以及相关操作,DotRAS组件是专门提供这样远程访问服务的模块,本文介绍如何通过应用该组件,实现ADSL网络的拨号、断网、获取用户IP的操作。
DotRAS组件的项目地址是:
http://dotras.codeplex.com/
先看看Demo的界面效果
具体的代码逻辑,是通过列出电话簿里面的拨号连接,设置是通过账户密码或者默认账户设置信息,进行拨号即可,使用DotRas组件,使得在DotNet中操作这些功能非常方便,代码贴上如下所示:
///
<summary>
///
测试拨号连接
///
</summary>
private
void
btnTest_Click(
object
sender, EventArgs e)
{
try
{
RasDialer dialer
=
new
RasDialer();
dialer.EntryName
=
"
联通网络
"
;
dialer.PhoneNumber
=
"
"
;
dialer.AllowUseStoredCredentials
=
true
;
dialer.PhoneBookPath
=
RasPhoneBook.GetPhoneBookPath(RasPhoneBookType.AllUsers);
dialer.Timeout
=
1000
;
dialer.Dial();
Thread.Sleep(
100
);
this
.LoadConnections();
}
catch
(Exception ex)
{
MessageBox.Show(ex.ToString());
}
}
///
<summary>
///
断开网络连接
///
</summary>
private
void
btnLogout_Click(
object
sender, EventArgs e)
{
ReadOnlyCollection
<
RasConnection
>
conList
=
RasConnection.GetActiveConnections();
foreach
(RasConnection con
in
conList)
{
con.HangUp();
}
this
.LoadConnections();
}
private
void
Form1_Load(
object
sender, EventArgs e)
{
this
.LoadConnections();
}
///
<summary>
///
显示活动的连接
///
</summary>
private
void
LoadConnections()
{
this
.comboBox1.Items.Clear();
this
.comboBox1.Items.Add(
new
ComboBoxItem(
"
请选择一个链接...
"
,
null
));
foreach
(RasConnection connection
in
RasConnection.GetActiveConnections())
{
this
.comboBox1.Items.Add(
new
ComboBoxItem(connection.EntryName, connection.EntryId));
}
this
.comboBox1.SelectedIndex
=
0
;
}
private
void
comboBox1_SelectedIndexChanged(
object
sender, EventArgs e)
{
this
.GetAddressButton.Enabled
=
this
.comboBox1.SelectedIndex
>
0
;
}
///
<summary>
///
获取IP地址信息
///
</summary>
private
void
GetAddressButton_Click(
object
sender, EventArgs e)
{
StringBuilder sb
=
new
StringBuilder();
foreach
(RasConnection connection
in
RasConnection.GetActiveConnections())
{
if
(connection.EntryId
==
(Guid)((ComboBoxItem)
this
.comboBox1.SelectedItem).Value)
{
RasIPInfo ipAddresses
=
(RasIPInfo)connection.GetProjectionInfo(RasProjectionType.IP);
if
(ipAddresses
!=
null
)
{
sb.AppendFormat(
"
ClientIP:{0}\r\n
"
, ipAddresses.IPAddress.ToString());
sb.AppendFormat(
"
ServerIP:{0}\r\n
"
, ipAddresses.ServerIPAddress.ToString());
}
}
sb.AppendLine();
}
MessageBox.Show(sb.ToString());
}
通过以上的代码,可以非常方便实现宽带的拨号连接和获取IP等设置,不过断网之后,一般的IP还是和原来一样,这个可能和服务器的缓存有关系,为了实现拨号后,本地为不同的IP设置,需要特别的处理才可以。