C#调用迅雷下载实例

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;
using System.Threading;

namespace ThunderSDK
{
class Program
{
enum enumTaskStatus
{
enumTaskStatus_Connect = 0,                 // 已经建立连接
enumTaskStatus_Download = 2,                // 开始下载
enumTaskStatus_Pause = 10,                  // 暂停
enumTaskStatus_Success = 11,                // 成功下载
enumTaskStatus_Fail = 12,                   // 下载失败
};
public const int XL_SUCCESS = 0;
public const int XL_ERROR_FAIL = 0x10000000;

// 尚未进行初始化
public const int XL_ERROR_UNINITAILIZE = XL_ERROR_FAIL + 1;

// 不支持的协议，目前只支持HTTP
public const int XL_ERROR_UNSPORTED_PROTOCOL = XL_ERROR_FAIL + 2;

// 初始化托盘图标失败
public const int XL_ERROR_INIT_TASK_TRAY_ICON_FAIL = XL_ERROR_FAIL + 3;

// 添加托盘图标失败
public const int XL_ERROR_ADD_TASK_TRAY_ICON_FAIL = XL_ERROR_FAIL + 4;

// 指针为空
public const int XL_ERROR_POINTER_IS_NULL = XL_ERROR_FAIL + 5;

// 字符串是空串
public const int XL_ERROR_STRING_IS_EMPTY = XL_ERROR_FAIL + 6;

// 传入的路径没有包含文件名
public const int XL_ERROR_PATH_DONT_INCLUDE_FILENAME = XL_ERROR_FAIL + 7;

// 创建目录失败
public const int XL_ERROR_CREATE_DIRECTORY_FAIL = XL_ERROR_FAIL + 8;

// 内存不足
public const int XL_ERROR_MEMORY_ISNT_ENOUGH = XL_ERROR_FAIL + 9;

// 参数不合法
public const int XL_ERROR_INVALID_ARG = XL_ERROR_FAIL + 10;

// 任务不存在
public const int XL_ERROR_TASK_DONT_EXIST = XL_ERROR_FAIL + 11;

// 文件名不合法
public const int XL_ERROR_FILE_NAME_INVALID = XL_ERROR_FAIL + 12;

// 没有实现
public const int XL_ERROR_NOTIMPL = XL_ERROR_FAIL + 13;

// 已经创建的任务数达到最大任务数，无法继续创建任务
public const int XL_ERROR_TASKNUM_EXCEED_MAXNUM = XL_ERROR_FAIL + 14;

// 任务类型未知
public const int XL_ERROR_INVALID_TASK_TYPE = XL_ERROR_FAIL + 15;

// 文件已经存在
public const int XL_ERROR_FILE_ALREADY_EXIST = XL_ERROR_FAIL + 16;

// 文件不存在
public const int XL_ERROR_FILE_DONT_EXIST = XL_ERROR_FAIL + 17;

// 读取cfg文件失败
public const int XL_ERROR_READ_CFG_FILE_FAIL = XL_ERROR_FAIL + 18;

// 写入cfg文件失败
public const int XL_ERROR_WRITE_CFG_FILE_FAIL = XL_ERROR_FAIL + 19;

// 无法继续任务，可能是不支持断点续传，也有可能是任务已经失败
// 通过查询任务状态，确定错误原因。
public const int XL_ERROR_CANNOT_CONTINUE_TASK = XL_ERROR_FAIL + 20;

// 无法暂停任务，可能是不支持断点续传，也有可能是任务已经失败
// 通过查询任务状态，确定错误原因。
public const int XL_ERROR_CANNOT_PAUSE_TASK = XL_ERROR_FAIL + 21;

// 缓冲区太小
public const int XL_ERROR_BUFFER_TOO_SMALL = XL_ERROR_FAIL + 22;

// 调用XLInitDownloadEngine的线程，在调用XLUninitDownloadEngine之前已经结束。
// 初始化下载引擎线程，在调用XLUninitDownloadEngine之前，必须保持执行状态。
public const int XL_ERROR_INIT_THREAD_EXIT_TOO_EARLY = XL_ERROR_FAIL + 23;

[DllImport("XLDownload.dll", EntryPoint = "XLInitDownloadEngine")]
public static extern bool XLInitDownloadEngine();
[DllImport("XLDownload.dll", EntryPoint = "XLURLDownloadToFile", CharSet = CharSet.Unicode)]
public static extern int XLURLDownloadToFile(string pszFileName, string pszUrl, string pszRefUrl, ref  Int32 lTaskId);
[DllImport("XLDownload.dll")]
public static extern int XLQueryTaskInfo(int lTaskId, ref int plStatus, ref double pullFileSize, ref double pullRecvSize);
[DllImport("XLDownload.dll")]
public static extern int XLPauseTask(int lTaskId, ref int lNewTaskId);
[DllImport("XLDownload.dll")]
public static extern int XLContinueTask(int lTaskId);
[DllImport("XLDownload.dll")]
public static extern int XLContinueTaskFromTdFile(string pszTdFileFullPath, ref int lTaskId);
[DllImport("XLDownload.dll")]
public static extern void XLStopTask(int lTaskId);
[DllImport("XLDownload.dll")]
public static extern bool XLUninitDownloadEngine();
[DllImport("XLDownload.dll")]
public static extern int XLGetErrorMsg(int dwErrorId, string pszBuffer, ref int dwSize);

static void Main(string[] args)
{
if (!XLInitDownloadEngine())
{
Console.WriteLine("下载引擎初始化错误");
return;
}

Int32 lTaskId = 0;
string filename = "d://xx.exe";
string url = "http://xmp.down.sandai.net/kankan/XMPSetup_3.8.1.485-www.exe";
string refurl = "http://xmp.down.sandai.net";
int dwRet = XLURLDownloadToFile(filename, url, refurl, ref  lTaskId);
if (XL_SUCCESS != dwRet)
{
XLUninitDownloadEngine();
Console.WriteLine("添加新任务失败");
return;
}
Console.WriteLine("开始下载");
do
{
Thread.Sleep(1000);
double pullFileSize = 0;
double pullRecvSize = 0;
int lStatus = -1;
dwRet = XLQueryTaskInfo(lTaskId, ref lStatus, ref pullFileSize, ref  pullRecvSize);
if (XL_SUCCESS == dwRet)
{
if ((int)enumTaskStatus.enumTaskStatus_Success == lStatus)
{
Console.WriteLine("下载完成");
break;
}
if (0 != pullFileSize)
{
double douProcess = (double)pullRecvSize / (double)pullFileSize;
douProcess *= 100.0;
Console.WriteLine("下载进度：{0}%", douProcess);
}
else
{
Console.WriteLine("文件长度为0");
}

}
} while (XL_SUCCESS == dwRet);
XLStopTask(lTaskId);
XLUninitDownloadEngine();
}
}
}