/// <summary>
/// 传输文件,多线程传输文件,默认最大20个;
/// </summary>
static public void TransFile()
{
BitsFileList.MoveFirst();
int i = 0, imax = _maxFiles * 100;
XmlNode nodeFile = null;
while (!BitsFileList.IsEOF() && i < imax)
{
i++;
nodeFile = BitsFileList.GetCurrentFile();
if (null == nodeFile)
{
break;
}
string strState = ((XmlElement)nodeFile).GetAttribute("state");
if ("moving" == strState)
{
continue;
}
if ("doing" == strState)
{
nodeFile.Attributes.RemoveNamedItem("state");
BitsFileList.MoveNext();
continue;
}
((XmlElement)nodeFile).SetAttribute("state", "moving");
ThreadPool.QueueUserWorkItem(new WaitCallback(HandleBits));
}
if (null != nodeFile)
{
nodeFile.Attributes.RemoveNamedItem("state");
}
BitsFileList.MoveFirst();
i = 0;
while (!BitsFileList.IsEOF() && i < imax)
{
i++;
nodeFile = BitsFileList.GetCurrentFile();
if (null != nodeFile)
{
nodeFile.Attributes.RemoveNamedItem("state");
}
BitsFileList.MoveNext();
}
BitsFileList.SaveFile();
}
/// <summary>
/// 检查/启动/结束传输作业进程,参数文件节点为空的取当前文件节点
/// </summary>
/// <param name="nodeFile">要管理的传输文件节点</param>
static private void HandleBits(Object o)
{
IBackgroundCopyManager bcm = null;
IBackgroundCopyJob job = null;
XmlNode nodeFile = null;
nodeFile = BitsFileList.GetCurrentFile();
if (null == nodeFile)
{
return;
}
((XmlElement)nodeFile).SetAttribute("state", "doing");
try
{
// Create BITS object
bcm = (IBackgroundCopyManager) new BackgroundCopyManager();
Guid jobID = Guid.Empty;
if (null != nodeFile.Attributes["jobguid"] && !string.IsNullOrEmpty(nodeFile.Attributes["jobguid"].Value))
{ // Do we already have a job in place?
jobID = new Guid(nodeFile.Attributes["jobguid"].Value);
BG_JOB_STATE state;
try
{
bcm.GetJob(ref jobID, out job); // Get the BITS job object
job.GetState(out state); // check its state
switch (state)
{
case BG_JOB_STATE.BG_JOB_STATE_ERROR: // If it is an error, re-poll
job.Complete();
nodeFile.Attributes.RemoveNamedItem("jobguid");
Marshal.ReleaseComObject(job);
job = null;
break;
case BG_JOB_STATE.BG_JOB_STATE_CANCELLED:
case BG_JOB_STATE.BG_JOB_STATE_TRANSFERRED: // If we got the job
job.Complete(); // then complete it
nodeFile.ParentNode.RemoveChild(nodeFile);
Marshal.ReleaseComObject(job);
Marshal.ReleaseComObject(bcm);
return;
default:
Marshal.ReleaseComObject(bcm);
return;
}
}
catch (Exception e)
{
NameValueCollection errInfo = new NameValueCollection();
errInfo["文件类别"] = nodeFile.Attributes["doctype"].Value;
errInfo["远程文件"] = nodeFile.Attributes["srcurl"].Value;
errInfo["作业Guid"] = nodeFile.Attributes["jobguid"].Value;
ExceptionManager.Publish(e, errInfo);
if (null != (e as UnauthorizedAccessException))
{
if (job != null)
{
Marshal.ReleaseComObject(job);
}
if (bcm != null)
{
Marshal.ReleaseComObject(bcm);
}
return;
}
COMException exCOM = e as COMException;
if (null != exCOM && exCOM.ErrorCode == unchecked ((Int32)0x80200001))
{
nodeFile.Attributes.RemoveNamedItem("jobguid");
}
else
{
return;
}
}
}
// Create a bits job to download the next expected update
if (null != nodeFile && (null == nodeFile.Attributes["jobguid"] || string.IsNullOrEmpty(nodeFile.Attributes["jobguid"].Value)))
{
bcm.CreateJob("下载远程文件",
BG_JOB_TYPE.BG_JOB_TYPE_DOWNLOAD, out jobID, out job);
string doctype = nodeFile.Attributes["doctype"].Value;
string srcurl = nodeFile.Attributes["srcurl"].Value;
string dest = nodeFile.Attributes["localname"].Value;
job.SetDescription("下载文件位置: " + doctype);
job.AddFile(srcurl, dest);
job.Resume(); // start the job in action
((XmlElement)nodeFile).SetAttribute("jobguid", jobID.ToString());
}
if (bcm != null)
{
Marshal.ReleaseComObject(bcm);
}
return;
}
catch { }
}