C#调用CMPP的东软Api（DLl）出问题，请C#高手帮助！分不够可以再加！
cmpp_connect_to_ismg("127.0.0.1", 7890, cns); 这个已经成功了
cmppe_login cpl = new cmppe_login();这个登录有问题！
未处理的“System.NullReferenceException”类型的异常出现在 WindowsApplication1.exe 中。
是不是我定义的结构要传参数，这个结构是根据标准C的头文件翻译过来的！
其他信息: 未将对象引用设置到对象的实例。
以下是完整的代码：
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Runtime.InteropServices;
using System.Net.Sockets;
namespace WindowsApplication1
{
#region CMPP结构定义
[StructLayout(LayoutKind.Sequential, Pack = 1)]
public struct cmppe_head
{
public uint pk_len;
public uint pk_cmd;
public uint pk_stat;
public uint pk_seq;
}
[StructLayout(LayoutKind.Sequential, Pack = 1)]
public struct cmppe_login
{
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 6)]
public string icp_id;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 16)]
public string icp_auth;
public byte icp_bind_type;
public byte if_version;
public uint icp_timestamp;
}
[StructLayout(LayoutKind.Sequential, Pack = 1)]
public struct cmppe_login_resp
{
public byte if_version;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 16)]
public string ismg_auth;
}
[StructLayout(LayoutKind.Sequential, Pack = 1)]
public struct cmppe_submit
{
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 6)]
public string icp_id;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 16)]
public string svc_type;
public byte fee_type;
public uint info_fee;
public byte proto_id;
public byte msg_mode;
public byte priority;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 16)]
public string validate;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 16)]
public string schedule;
public byte fee_utype;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 16)]
public string fee_user;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 16)]
public string src_addr;
public byte du_count;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 16)]
public string dst_addr;
public byte data_coding;
public byte sm_len;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 16)]
public string short_msg;
}
[StructLayout(LayoutKind.Sequential, Pack = 1)]
public struct cmppe_us_user
{
public byte index;
public byte stat;
}
[StructLayout(LayoutKind.Sequential, Pack = 1)]
public struct cmppe_submit_resp
{
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 16)]
public string msg_id;
public byte us_count;
public cmppe_us_user us_user;
}
[StructLayout(LayoutKind.Sequential, Pack = 1)]
public struct cmppe_deliver_rpt
{
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 16)]
public string msg_id;
public byte final_status;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 16)]
public string submit_date;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 16)]
public string final_date;
}
[StructLayout(LayoutKind.Sequential, Pack = 1)]
public struct cmppe_mo_msgcontent
{
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 160)]
public string short_msg;
public cmppe_deliver_rpt sm_rpt;
}
[StructLayout(LayoutKind.Sequential, Pack = 1)]
public struct cmppe_deliver
{
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 16)]
public string src_addr;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 16)]
public string dst_addr;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 16)]
public string svc_type;
public byte proto_id;
public byte status_rpt;
public byte priority;
public byte data_coding;
public byte sm_len;
public cmppe_mo_msgcontent pk_sm;
}
[StructLayout(LayoutKind.Sequential, Pack = 1)]
public struct cmppe_cancel
{
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 16)]
public string msg_id;
}
[StructLayout(LayoutKind.Sequential, Pack = 1)]
public struct icp_trans
{
public Socket socket;
public uint sequence;
public uint icp_seq;
public byte mode;
public byte status;
public byte stat;
public byte version;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 16)]
public string icp_id;
}
[StructLayout(LayoutKind.Sequential, Pack = 1)]
public struct icp_data_packet
{
public cmppe_login login_body;
public cmppe_submit submit_body;
public cmppe_cancel cancel_body;
}
[StructLayout(LayoutKind.Sequential, Pack = 1)]
public struct icp_packet
{
public uint pk_cmd;
public uint pk_seq;
public uint pk_stat;
public icp_data_packet pk_data;
}
[StructLayout(LayoutKind.Sequential, Pack = 1)]
public struct comppe_data_packet
{
public cmppe_deliver pk_deliver;
public cmppe_login_resp pk_login_resp;
public cmppe_submit_resp pk_submit_resp;
}
[StructLayout(LayoutKind.Sequential, Pack = 1)]
public struct cmppe_packet
{
public cmppe_head pk_head;
public uint result;
public comppe_data_packet pk_data;
}
[StructLayout(LayoutKind.Sequential, Pack = 1)]
public struct conn_desc
{
public Socket sock;
public long seq;
public int status;
public char act_flag;
}
#endregion
public delegate void On_conn_desc();
public delegate void On_cmppe_login();
/// <summary>
/// Form1 的摘要说明。
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.Button button1;
private System.Windows.Forms.TextBox textBox1;
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.Container components = null;
public Form1()
{
//
// Windows 窗体设计器支持所必需的
//
InitializeComponent();
//
// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
//
}
/// <summary>
/// 清理所有正在使用的资源。
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
问题点数：100、回复次数：10Top
1 楼sgp1201（无为）回复于 2005-04-03 15:46:42 得分 0
接上页
#region Windows 窗体设计器生成的代码
/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.button1 = new System.Windows.Forms.Button();
this.textBox1 = new System.Windows.Forms.TextBox();
this.SuspendLayout();
//
// button1
//
this.button1.Location = new System.Drawing.Point(104, 224);
this.button1.Name = "button1";
this.button1.TabIndex = 0;
this.button1.Text = "button1";
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// textBox1
//
this.textBox1.Location = new System.Drawing.Point(0, 0);
this.textBox1.Multiline = true;
this.textBox1.Name = "textBox1";
this.textBox1.Size = new System.Drawing.Size(296, 208);
this.textBox1.TabIndex = 1;
this.textBox1.Text = "textBox1";
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(292, 273);
this.Controls.Add(this.textBox1);
this.Controls.Add(this.button1);
this.Name = "Form1";
this.Text = "Form1";
this.Load += new System.EventHandler(this.Form1_Load);
this.ResumeLayout(false);
}
#endregion
/// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new Form1());
}
#region API函数声明
public static void Onconn_desc()
{
}
public static void Oncmppe_login()
{
}
// [DllImport("api.dll")]
// public static extern int cmpp_connect_to_ismg(string host, int port, On_conn_desc cns);
//
// [DllImport("api.dll")]
// public static extern int cmpp_login(On_conn_desc cns,On_cmppe_login cpl);
//
//标准C函数原型
/*cmpp_connect_to_ismg
功能描述
建立与ISMG服务器的连接
函数原型
dpl_status_t cmpp_connect_to_ismg(char *host，dpl_port_t port，conn_desc *conn);
返回值
DPL_SUCCESS：成功与服务器建立连接
DPL_EINVALSOCK：创建连接套接字失败
DPL_EINVAL：非法服务器地址
DPL_HOST_UNREACHABLE：连接服务器失败
参数
host：服务器的IP地址
port：服务器的端口号
conn：输出参数，用于传出对ISMG的连接描述
*/
[DllImport("api.dll")]
public static extern int cmpp_connect_to_ismg(string host, int port, On_conn_desc cns);
//标准C函数原型
/* cmpp_login
功能描述
发送登录请求到远程ISMG服务器
函数原型
dpl_status_t cmpp_login(conn_desc *conn，cmppe_login *cl)
返回值
DPL_SUCCESS：发送请求成功
其他 网络原因造成登录失败，返回错误码
参数
conn：与ISMG的连接描述 cl：登录请求包
*/
[DllImport("api.dll")]
public static extern int cmpp_login(On_conn_desc cns,cmppe_login cpl);
#endregion
private void button1_Click(object sender, System.EventArgs e)
{
On_conn_desc cns = new On_conn_desc(Onconn_desc);
// On_cmppe_login cpl = new On_cmppe_login(Oncmppe_login);
int nRetCode;
nRetCode = cmpp_connect_to_ismg("127.0.0.1", 7890, cns);
MessageBox.Show(nRetCode.ToString());
cmppe_login cpl = new cmppe_login();
cpl.icp_id = "954321";
// cpl.icp_auth = "954321";
// cpl.icp_bind_type = 2;
// cpl.if_version = 0x12;
// cpl.icp_timestamp = (uint)DateTime.Now.ToFileTimeUtc();
nRetCode = cmpp_login(cns, cpl);
}
private void Form1_Load(object sender, System.EventArgs e)
{
}
}
}
Top
2 楼qing_zhou（轻舟）回复于 2005-04-03 16:16:19 得分 0
好长啊，先顶住。Top
3 楼fans869（fans869@china.com）回复于 2005-04-03 18:07:53 得分 20
晕Top
4 楼nadoo（）回复于 2005-04-04 21:42:28 得分 20
给你顶住... 我毕业去东软工作.Top
5 楼sgp1201（无为）回复于 2005-04-05 09:02:44 得分 0
自己顶！Top
6 楼3gold（新丁）回复于 2005-04-05 09:06:42 得分 20
这么长，怎么看啊？Top
7 楼sgp1201（无为）回复于 2005-04-08 18:12:53 得分 0
自己解决了！Top
8 楼sgp1201（无为）回复于 2005-04-08 18:16:48 得分 0
谢谢各位支持，等有人提点有意义的见解就结！Top
9 楼Flashcom（虫虫）回复于 2005-04-08 18:52:31 得分 40
C#调用C++的的API总觉得不爽,所以自己用C#写了一个CMPP3的API,基本的的登陆、提交短信接收短信或状态报告等都完成了，在压力的测试下也完成了，也在华为的网关测试过了！但总觉得代码还不够完美，所以还在进步完善中。。不过最近都没有时间在搞它了！Top
10 楼hoen（coolpocket）回复于 2005-06-29 16:03:23 得分 0
呵呵今天刚弄完了Top
