void DoExportXmlFile(string strOutputFileName)
{
string strError = "";
FileStream outputfile = null;
XmlTextWriter writer = null;
if (textBox_dbPath.Text == "")
{
MessageBox.Show(this, "尚未选择源库...");
return;
}
ResPath respath = new ResPath(textBox_dbPath.Text);
channel = this.Channels.GetChannel(respath.Url);
string strDbName = respath.Path;
if (strOutputFileName != null && strOutputFileName != "")
{
// 探测文件是否存在
FileInfo fi = new FileInfo(strOutputFileName);
if (fi.Exists == true && fi.Length > 0)
{
DialogResult result = MessageBox.Show(this,
"文件 '" + strOutputFileName + "' 已存在，是否覆盖?\r\n\r\n--------------------\r\n注：(是)覆盖 (否)中断处理",
"dp2batch",
MessageBoxButtons.YesNo,
MessageBoxIcon.Question,
MessageBoxDefaultButton.Button2);
if (result != DialogResult.Yes)
{
strError = "放弃处理...";
goto ERROR1;
}
}
// 打开文件
outputfile = File.Create(
strOutputFileName);
writer = new XmlTextWriter(outputfile, Encoding.UTF8);
writer.Formatting = Formatting.Indented;
writer.Indentation = 4;
}
try
{
Int64 nStart;
Int64 nEnd;
Int64 nCur;
bool bAsc = GetDirection(out nStart,
out nEnd);
// 设置进度条范围
Int64 nMax = nEnd - nStart;
if (nMax < 0)
nMax *= -1;
nMax ++;
ProgressRatio = nMax / 10000;
if (ProgressRatio < 1.0)
ProgressRatio = 1.0;
progressBar_main.Minimum = 0;
progressBar_main.Maximum = (int)(nMax/ProgressRatio);
progressBar_main.Value = 0;
bool bFirst = true; // 是否为第一次取记录
string strID = this.textBox_startNo.Text;
stop.Initial(new Delegate_doStop(this.DoStop),
"正在导出数据");
stop.BeginLoop();
EnableControls(false);
if (writer != null)
{
writer.WriteStartDocument();
writer.WriteStartElement("dprms","collection",DpNs.dprms);
//writer.WriteStartElement("collection");
//writer.WriteAttributeString("xmlns:marc",
// "http://www.loc.gov/MARC21/slim");
}
// 循环
for(;;)
{
Application.DoEvents(); // 出让界面控制权
if (stop.State != 0)
{
strError = "用户中断";
goto ERROR1;
}
string strStyle = "";
if (outputfile != null)
strStyle = "data,content,timestamp,outputpath";
else
strStyle = "timestamp,outputpath"; // 优化
if (bFirst == true)
strStyle += "";
else
{
if (bAsc == true)
strStyle += ",next";
else
strStyle += ",prev";
}
string strPath = strDbName + "/" + strID;
string strXmlBody = "";
string strMetaData = "";
byte[] baOutputTimeStamp = null;
string strOutputPath = "";
bool bFoundRecord = false;
// 获得资源
// return:
// -1 出错。具体出错原因在this.ErrorCode中。this.ErrorInfo中有出错信息。
// 0 成功
long lRet = channel.GetRes(strPath,
strStyle,
out strXmlBody,
out strMetaData,
out baOutputTimeStamp,
out strOutputPath,
out strError);
if (lRet == -1)
{
if (channel.ErrorCode == ChannelErrorCode.NotFound)
{
if (checkBox_forceLoop.Checked == true && bFirst == true)
{
AutoCloseMessageBox.Show(this, "记录 " + strID + " 不存在。\r\n\r\n按 确认 继续。");
bFirst = false;
goto CONTINUE;
}
else
{
if (bFirst == true)
{
strError = "记录 " + strID + " 不存在。处理结束。";
}
else
{
if (bAsc == true)
strError = "记录 " + strID + " 是最末一条记录。处理结束。";
else
strError = "记录 " + strID + " 是最前一条记录。处理结束。";
}
}
}
else if (channel.ErrorCode == ChannelErrorCode.EmptyRecord)
{
bFirst = false;
bFoundRecord = false;
// 把id解析出来
strID = ResPath.GetRecordId(strOutputPath);
goto CONTINUE;
}
goto ERROR1;
}
bFirst = false;
bFoundRecord = true;
// 把id解析出来
strID = ResPath.GetRecordId(strOutputPath);
CONTINUE:
stop.SetMessage(strID);
// 是否超过循环范围
try
{
nCur = Convert.ToInt64(strID);
}
catch
{
// ???
nCur = 0;
}
if (bAsc == true && nCur > nEnd)
break;
if (bAsc == false && nCur < nEnd)
break;
if (bFoundRecord == true
&& writer != null)
{
// 写磁盘
XmlDocument dom = new XmlDocument();
try
{
dom.LoadXml(strXmlBody);
ResPath respathtemp = new ResPath();
respathtemp.Url = channel.Url;
respathtemp.Path = strOutputPath;
// DomUtil.SetAttr(dom.DocumentElement, "xmlns:dprms", DpNs.dprms);
// 给根元素设置几个参数
DomUtil.SetAttr(dom.DocumentElement, "path", DpNs.dprms, respathtemp.FullPath);
DomUtil.SetAttr(dom.DocumentElement, "timestamp", DpNs.dprms, ByteArray.GetHexTimeStampString(baOutputTimeStamp));
// DomUtil.SetAttr(dom.DocumentElement, "xmlns:marc", null);
dom.DocumentElement.WriteTo(writer);
}
catch (Exception ex)
{
strError = ex.Message;
// 询问是否继续
goto ERROR1;
}
/*
if (nRet == -1)
{
// 询问是否继续
goto ERROR1;
}
*/
}
// 删除
if (checkBox_export_delete.Checked == true)
{
byte [] baOutputTimeStamp1 = null;
strPath = strOutputPath; // 得到实际的路径
lRet = channel.DoDeleteRecord(
strPath,
baOutputTimeStamp,
out baOutputTimeStamp1,
out strError);
if (lRet == -1)
{
// 询问是否继续
goto ERROR1;
}
}
if (bAsc == true)
{
progressBar_main.Value = (int)((nCur-nStart + 1)/ProgressRatio);
}
else
{
// ?
progressBar_main.Value = (int)((nStart-nCur + 1)/ProgressRatio);
}
// 对已经作过的进行判断
if (bAsc == true && nCur >= nEnd)
break;
if (bAsc == false && nCur <= nEnd)
break;
}
stop.EndLoop();
stop.Initial(null, "");
EnableControls(true);
}
finally
{
if (writer != null)
{
writer.WriteEndElement();
writer.WriteEndDocument();
writer.Close();
writer = null;
}
if (outputfile != null)
{
outputfile.Close();
outputfile = null;
}
}
END1:
channel = null;
if (checkBox_export_delete.Checked == true)
MessageBox.Show(this, "数据导出和删除完成。");
else
MessageBox.Show(this, "数据导出完成。");
return;
ERROR1:
stop.EndLoop();
stop.Initial(null, "");
EnableControls(true);
channel = null;
MessageBox.Show(this, strError);
return;
}
