// strStart, // 起始路径, ""表示根
Package GetOneLevelDirPackage(string strStart)
{
int nRet;
byte [] baPackage = null;
// bool bSetDefault = false; // 表示是否使用过缺省帐户
//bool bFirstLogin = true;
Package package = new Package();
// CWaitCursor cursor;
if (Channel == null)
{
Channel = channelarray.CreateChannel(0);
}
Debug.Assert(Channel != null, "channel尚未初始化");
Cursor.Current = Cursors.WaitCursor;
if (Stop != null)
{
Stop.OnStop += new StopEventHandler(this.DoStop);
Stop.SetMessage("正在列目录 '" + strStart + "' ...");
Stop.BeginLoop();
}
try
{
nRet = Channel.Dir(strStart,
out baPackage);
}
finally
{
if (Stop != null)
{
Stop.EndLoop();
Stop.OnStop -= new StopEventHandler(this.DoStop);
Stop.Initial("");
}
Cursor.Current = Cursors.Default;
}
if (nRet == -1)
{
Channel.ErrorBox(this,
"restree",
"列目录发生错误");
goto ERROR1;
}
package.LoadPackage(baPackage, Channel.GetPathEncoding(strStart));
package.Parse(PackageFormat.String);
return(package);
ERROR1:
return(null);
}
// 得到下一条记录
// return:
// -1 出错
// 0 继续
// 1 到达末尾(超过m_strEndNumber)
// 2 没有找到记录
public int NextRecord(ref int nRecCount,
out string strError)
{
strError = "";
string strPath;
string strNumber;
string strNextNumber;
byte[] baPackage = null;
int nSearchStyle = DtlpChannel.XX_STYLE;
int nRet;
int nErrorNo;
int nDirStyle = 0; // 方向风格
byte[] baMARC = null;
if (this.channel == null)
{
this.channel = this.Channels.CreateChannel(0);
}
Debug.Assert(m_strStartNumber != "",
"m_strStartNumber值不能为空");
Debug.Assert(m_strEndNumber != "",
"m_strEndNumber值不能为空");
// 首次进入本函数
if (nRecCount == -1)
{
strNumber = m_strStartNumber;
nDirStyle = 0;
nRecCount = 0;
}
else
{
strNumber = m_strNextNumber;
if (Convert.ToInt64(m_strStartNumber) <= Convert.ToInt64(m_strEndNumber))
{
nDirStyle = DtlpChannel.NEXT_RECORD;
if (Convert.ToInt64(strNumber) >= Convert.ToInt64(m_strEndNumber))
{
return(1); // 结束
}
}
else
{
nDirStyle = DtlpChannel.PREV_RECORD;
if (Convert.ToInt64(strNumber) <= Convert.ToInt64(m_strEndNumber))
{
return(1); // 结束
}
}
}
strPath = m_strDBPath;
strPath += "/ctlno/";
strPath += strNumber;
// REDO:
nRet = channel.Search(strPath,
nSearchStyle | nDirStyle,
out baPackage);
if (nRet == -1)
{
nErrorNo = channel.GetLastErrno();
if (nErrorNo == DtlpChannel.GL_NOTLOGIN)
{
// 重新登录的事情，已经被Search()接管了
}
else
{
if (nErrorNo == DtlpChannel.GL_NOTEXIST)
{
// 增量号码
Int64 n64Number = Convert.ToInt64(strNumber);
string strVersion;
// GetDTLPVersion(m_strDBPath, strVersion); // 可以将库名再去除，效果更好
strVersion = "0.9";
if (n64Number + 1 < 9999999 &&
strVersion == "0.9")
{
//strNumber.Format(_T("%I0764d"), n64Number+1);
// 确保7位数字
strNumber = String.Format("{0:D7}", n64Number + 1); // "{0,7:D}" BUG!!! 左边实际上是空格 2009/2/26
}
else
{
// strNumber.Format(_T("%I64d"), n64Number+1);
strNumber = String.Format("{0:D7}", n64Number + 1); // "{0,7:D}" BUG!!! 左边实际上是空格 2009/2/26
}
m_strCurNumber = strNumber;
goto NOTFOUND;
}
this.ErrorNo = nErrorNo;
if (nErrorNo == DtlpChannel.GL_INVALIDCHANNEL)
{
this.channel = null;
}
// 得到字符串即可
/*
* channel.ErrorBox(owner, "DtlpIO",
* "检索发生错误\nSearch() error");
* */
strError = "检索发生错误\nSearch() error: \r\n" + channel.GetErrorDescription();
goto ERROR1;
}
m_strPath = strPath;
goto ERROR1;
}
///
Package package = new Package();
package.LoadPackage(baPackage, channel.GetPathEncoding(strPath));
nRet = package.Parse(PackageFormat.Binary);
if (nRet == -1)
{
Debug.Assert(false, "Package::Parse() error");
strError = "Package::Parse() error";
goto ERROR1;
}
nRet = package.GetFirstBin(out baMARC);
if (nRet == -1 || nRet == 0)
{
Debug.Assert(false, "Package::GetFirstBin() error");
strError = "Package::GetFirstBin() error";
goto ERROR1;
}
if (baMARC.Length >= 9)
{
Array.Copy(baMARC, 0, m_baTimeStamp, 0, 9);
byte [] baBody = new byte[baMARC.Length - 9];
Array.Copy(baMARC, 9, baBody, 0, baMARC.Length - 9);
baMARC = baBody;
//baMARC.RemoveAt(0, 9); // 时间戳
}
else
{
// 记录有问题，放入一个空记录?
}
// ---????????? 编写一个在byte[]末尾追加东西的函数?
// baMARC = ByteArray.Add(baMARC, (byte)0);
// baMARC.Add(0);
// baMARC.Add(0);
m_strRecord = channel.GetPathEncoding(strPath).GetString(baMARC);
strPath = package.GetFirstPath();
nRet = GetCtlNoFromPath(strPath,
out strNextNumber);
if (nRet == -1)
{
Debug.Assert(false, "GetCtlNoFromPath() return error ...");
strError = "GetCtlNoFromPath() error ...";
goto ERROR1;
}
m_strNextNumber = strNextNumber;
if (nRecCount == 0) // 首次
{
m_strCurNumber = strNumber;
}
else
{
m_strCurNumber = strNextNumber;
}
m_strPath = strPath; //
nRecCount++;
return(0);
ERROR1:
return(-1);
NOTFOUND:
return(2);
}