Windows Mobile 下使用C#进行GPRS、CDMA开发(转)

本文主要是介绍Windows Mobile 下使用C#进行GPRS、CDMA开发(转)，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

有关GPRS、CDMA开发的文章网上已经有不少，但是由于Windows Mobile SDK提供的GPRS、CDMA连接操作的库只有C++版本的（即Connection Manager API），网上的文章大多数都是C++版本的，尽管也有C#编写的但是大多封装的有些不对并且没有经过很好的测试，本文在网络已有的资料上整理出如何用C#进行GPRS、CDMA开发。

参考文献：

http://www.vckbase.com/document/viewdoc/?id=1803

http://www.cnblogs.com/jsjkandy/archive/2008/08/06/1262445.html

http://blogs.msdn.com/anthonywong/archive/2006/03/13/550686.aspx

开发环境

Visual Studio 2005

Windows Mobile 6 SDK Professional

头文件封装

我们要用到Windows Mobile SDK的一个C++的头文件Connmgr.h，它的路径是：c:/program files/windows mobile 6 sdk/pocketpc/include/armv4i/connmgr.h，首先要用C#重新定义要用到的这个头文件的常量、结构和外部函数声明。

有关C#平台封送的更多说明可以参考MSDN：

http://msdn.microsoft.com/zh-cn/library/fzhhdwae(VS.80).aspx

常量声明：

[code=C#]
const int S_OK = 0;
const uint CONNMGR_PARAM_GUIDDESTNET = 0x1;
const uint CONNMGR_PRIORITY_USERINTERACTIVE = 0x08000;
const uint INFINITE = 0xffffffff;
const uint CONNMGR_STATUS_CONNECTED = 0x10;
const int CONNMGR_MAX_DESC = 128;           // @constdefine Max size of a network description
const int CONNMGR_FLAG_PROXY_HTTP = 0x1;    // @constdefine HTTP Proxy supported
const int CONNMGR_FLAG_PROXY_WAP = 0x2;     // @constdefine WAP Proxy (gateway) supported
const int CONNMGR_FLAG_PROXY_SOCKS4 = 0x4;  // @constdefine SOCKS4 Proxy supported
const int CONNMGR_FLAG_PROXY_SOCKS5 = 0x8;  // @constdefine SOCKS5 Proxy supported
const UInt16 IDC_WAIT = 32514;
const UInt16 IDC_ARROW = 32512;
[/code]

结构封送声明：

C++原型：

[code=C++]
typedef struct _CONNMGR_CONNECTIONINFO
{
DWORD cbSize;       // @field Size of this structure
DWORD dwParams;     // @field Valid parms, set of CONNMGR_PARAM_*
DWORD dwFlags;      // @field Connection flags, set of CONNMGR_FLAG_*
DWORD dwPriority;   // @field Priority, one of CONNMGR_PRIORITY_*
BOOL bExclusive;    // @field Connection is exclusive, see comments
BOOL bDisabled;     // @field Don't actually connect
GUID guidDestNet;   // @field GUID of network to connect to
HWND hWnd;          // @field hWnd to post status change messages to
UINT uMsg;          // @field Msg to use when posting status changes
LPARAM lParam;      // @field lParam to use when posting status changes
ULONG ulMaxCost;    // @field Max acceptable cost of connection
ULONG ulMinRcvBw;   // @field Min acceptable receive bandwidth of connection
ULONG ulMaxConnLatency; // @field Max acceptable connect latency
} CONNMGR_CONNECTIONINFO;
typedef struct _CONNMGR_DESTINATION_INFO
{
GUID guid;  // @field GUID associated with network
TCHAR szDescription[CONNMGR_MAX_DESC];  // @field Description of network
BOOL fSecure; // @field Is it OK to allow multi-homing on the network
} CONNMGR_DESTINATION_INFO;
typedef struct _GUID {          // size is 16
DWORD Data1;
WORD   Data2;
WORD   Data3;
BYTE  Data4[8];
} GUID;
[/code]

C#声明

[code=C#]
[StructLayout(LayoutKind.Sequential)]
public struct CONNMGR_CONNECTIONINFO
{
public uint cbSize;
public uint dwParams;
public uint dwFlags;
public uint dwPriority;
public int bExclusive;
public int bDisabled;
public GUID guidDestNet;
public IntPtr hWnd;
public uint uMsg;
public uint lParam;
public uint ulMaxCost;
public uint ulMinRcvBw;
public uint ulMaxConnLatency;
}
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct CONNMGR_DESTINATION_INFO
{
public GUID guid;  // @field GUID associated with network
[MarshalAs(UnmanagedType.ByValTStr,SizeConst = CONNMGR_MAX_DESC)]
public string szDescription;  // @field Description of network
public int fSecure; // @field Is it OK to allow multi-homing on the network
}
public struct GUID
{          // size is 16
public uint Data1;
public UInt16 Data2;
public UInt16 Data3;
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 8)]
public byte[] Data4;
}
[/code]

函数封送声明：

C++原型：

请参考connmgr.h

C#声明：

[code=C#]
[DllImport("coredll.dll")]
public static extern uint GetTickCount();
[DllImport("coredll.dll")]
public static extern uint WaitForSingleObject(IntPtr hHandle,uint dwMilliseconds);
[DllImport("cellcore.dll")]
public static extern int ConnMgrMapURL(string pwszURL, ref GUID pguid, ref uint pdwIndex);
[DllImport("cellcore.dll")]
public static extern int ConnMgrEstablishConnectionSync(ref CONNMGR_CONNECTIONINFO ci, ref IntPtr phConnection, uint dwTimeout, ref uint pdwStatus);
[DllImport("cellcore.dll")]
private static extern IntPtr ConnMgrApiReadyEvent();
[DllImport("cellcore.dll")]
public static extern int ConnMgrReleaseConnection(IntPtr hConnection, int bCache);
[DllImport("cellcore.dll")]
public static extern int ConnMgrEnumDestinations(int nIndex,ref CONNMGR_DESTINATION_INFO pDestInfo);
[DllImport("cellcore.dll")]
public static extern int ConnMgrConnectionStatus(IntPtr hConnection, ref uint pdwStatus );  
[DllImport("coredll.dll")]
private static extern int CloseHandle(IntPtr hObject);
[/code]

这里参考http://www.vckbase.com/document/viewdoc/?id=1803例子用C#封装一个类库，并实现类似的Demo。运行界面如下图所示：

在Demo中，增加一个建立GPRS和建立CDMA连接的演示，代码：

[code=C#]
/// <summary>
/// 连接到移动网络
/// </summary>
/// <returns></returns>
private static bool ConnectMobileNetwork(string csDesc)
{
ConnectManager connectManager = new ConnectManager();
List<ConnectManager.CONNMGR_DESTINATION_INFO> lst = connectManager.EnumNetIdentifier();
int nIndex = 0;
//选择连接
for (; nIndex < lst.Count; nIndex++)
{
if (string.Compare(lst[nIndex].szDescription, csDesc, true) == 0)
{
break;
}
}
//建立连接
if (nIndex >= 0 && nIndex < lst.Count)
{
return connectManager.EstablishConnection((uint)nIndex);
}
return false;
}
/// <summary>
/// 建立GPRS连接
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnConnectGPRS_Click(object sender, EventArgs e)
{
if (!ConnectMobileNetwork("Internet 设置"))
{
MessageBox.Show("未能建立GPRS连接！");
return;
}
else
{
MessageBox.Show("成功建立GPRS连接！");
}
}        /// <summary>
/// 建立CDMA连接
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnConnectCDMA_Click(object sender, EventArgs e)
{
if (!ConnectMobileNetwork("联通wap"))
{
MessageBox.Show("未能建立CDMA连接！");
return;
}
else
{
MessageBox.Show("成功建立CDMA连接！");
}
} 
[/code]