关于c#:创建GPRS连接

Create GPRS connection

我有一台运行 Windows Mobile 5.0 的设备。它有一个程序，可以在运行时即时创建和删除手持设备的 GPRS 连接。

我正在尝试构建一个可以做类似事情的小程序。可以通过参数调用它来启动连接，但是连接需要保持，以便之后即使我的程序没有运行也可以使用手机。

使用这篇 MSDN 文章，我编写了一些代码，可以很好地创建 GPRS 连接(连接成功)但是，它似乎不是手机可以使用的连接。

在我的程序运行后，我有什么方法可以使设备连接可用？如果是这样，那是特定于设备的吗？

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const int _syncConnectTimeOut = 60000;

[DllImport("CellCore.dll")]
static extern int ConnMgrMapURL(string url, ref Guid networkGuid, int passZero);
[DllImport("CellCore.dll")]
static extern int ConnMgrEstablishConnection(ConnMgrConnectionInfo connectionInfo, ref IntPtr connectionHandle);
[DllImport("CellCore.dll")]
static extern int ConnMgrEstablishConnectionSync(ConnMgrConnectionInfo connectionInfo, ref IntPtr connectionHandle, uint dwTimeout, ref ConnMgrStatus dwStatus);
[DllImport("CellCore.dll")]
static extern int ConnMgrReleaseConnection(IntPtr connectionHandle, int cache);
[DllImport("CellCore.dll")]
static extern int ConnMgrConnectionStatus(IntPtr connectionHandle, ref ConnMgrStatus status);

public void Start(string name)
{
string url ="http://internet.com/";
IntPtr _connectionHandle = IntPtr.Zero;

Guid networkGuid = Guid.Empty;
ConnMgrStatus status = ConnMgrStatus.Unknown;
ConnMgrMapURL(url, ref networkGuid, 0);
ConnMgrConnectionInfo info = new ConnMgrConnectionInfo(networkGuid, ConnMgrPriority.HighPriorityBackground);
ConnMgrEstablishConnectionSync(info, ref _connectionHandle, _syncConnectTimeOut, ref status);

if (status == ConnMgrStatus.Connected) {
Debug.WriteLine("Connect Succeeded");
} else {
Debug.WriteLine("Connect failed:" + status.ToString());
}
}

[Flags]
enum ConnMgrParam : int
{
GuidDestNet = 0x1,
MaxCost = 0x2,
MinRcvBw = 0x4,
MaxConnLatency = 0x8
}

[Flags]
enum ConnMgrProxy : int
{
NoProxy = 0x0,
Http = 0x1,
Wap = 0x2,
Socks4 = 0x4,
Socks5 = 0x8
}

enum ConnMgrPriority
{
UserInteractive = 0x8000,
HighPriorityBackground = 0x0200,
LowPriorityBackground = 0x0008
}

enum ConnMgrStatus
{
Unknown = 0x00,
Connected = 0x10,
Suspended = 0x11,
Disconnected = 0x20,
ConnectionFailed = 0x21,
ConnectionCanceled = 0x22,
ConnectionDisabled = 0x23,
NoPathToDestination = 0x24,
WaitingForPath = 0x25,
WaitingForPhone = 0x26,
PhoneOff = 0x27,
ExclusiveConflict = 0x28,
NoResources = 0x29,
ConnectionLinkFailed = 0x2a,
AuthenticationFailed = 0x2b,
NoPathWithProperty = 0x2c,
WaitingConnection = 0x40,
WaitingForResource = 0x41,
WaitingForNetwork = 0x42,
WaitingDisconnection = 0x80,
WaitingConnectionAbort = 0x81
}

[StructLayout(LayoutKind.Sequential)]
class ConnMgrConnectionInfo
{
Int32 cbSize; // DWORD
public ConnMgrParam dwParams = 0; // DWORD
public ConnMgrProxy dwFlags = 0; // DWORD
public ConnMgrPriority dwPriority = 0; // DWORD
public Int32 bExclusive = 0; // BOOL
public Int32 bDisabled = 0; // BOOL
public Guid guidDestNet = Guid.Empty; // GUID
public IntPtr hWnd = IntPtr.Zero; // HWND
public UInt32 uMsg = 0; // UINT
public Int32 lParam = 0; // LPARAM
public UInt32 ulMaxCost = 0; // ULONG
public UInt32 ulMinRcvBw = 0; // ULONG
public UInt32 ulMaxConnLatency = 0; // ULONG

public ConnMgrConnectionInfo()
{
cbSize = Marshal.SizeOf(typeof(ConnMgrConnectionInfo));
}

public ConnMgrConnectionInfo(Guid destination, ConnMgrPriority priority, ConnMgrProxy proxy)
: this()
{
guidDestNet = destination;
dwParams = ConnMgrParam.GuidDestNet;
dwPriority = priority;
dwFlags = proxy;
}

public ConnMgrConnectionInfo(Guid destination, ConnMgrPriority priority)
: this(destination, priority, ConnMgrProxy.NoProxy) { }

public ConnMgrConnectionInfo(Guid destination)
: this(destination, ConnMgrPriority.UserInteractive) { }
}

相关讨论

约瑟夫让我走上了正确的道路。我找到了这个答案和后续链接，这些链接解释了如何使用 OMA 客户端配置来更改设备配置并最终允许我创建 GPRS 连接。

http://msdn.microsoft.com/en-us/bb737297

代码：

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/// <summary>
/// Creates a GPRS Connection with the specified name.
/// </summary>
/// <param name="name">The name of the connection to create.</param>
public void Start(string name)
{
string xml ="<wap-provisioningdoc>" +
"<characteristic type="CM_GPRSEntries">" +
"<characteristic type="" + name +"">" +
"<parm name="DestId" value="{436EF144-B4FB-4863-A041-8F905A62C572}" />" +
"<parm name="UserName" value="" />" +
"<parm name="Password" value="" />" +
"<parm name="Domain" value="" />" +
"<characteristic type="DevSpecificCellular">" +
"<parm name="GPRSInfoValid" value="1" />" +
"<parm name="GPRSInfoAccessPointName" value="internet.com" />" +
"</characteristic>" +
"</characteristic>" +
"</characteristic>" +
"</wap-provisioningdoc>";

XmlDocument configDoc = new XmlDocument();
configDoc.LoadXml(xml);

XmlDocument result = ConfigurationManager.ProcessConfiguration(configDoc, true);
}

要创建或删除连接，请使用带有 wap 配置 xml 文件的 dmprocessconfig。 msdn 有这方面的例子