// 得到行对象。如果不存在，则临时创建一个
/// <summary>
/// 得到行对象。如果不存在，则临时创建一个
/// </summary>
/// <param name="strEntry">事项名</param>
/// <returns>已经存在的或者新创建的 StringCacheItem 对象</returns>
public StringCacheItem EnsureItem(string strEntry)
{
#if NEWLOCK
this.m_lock.EnterWriteLock();
#else
this.m_lock.AcquireWriterLock(m_nLockTimeout);
#endif
try
{
if (items.Count > MaxItems)
{
this.items.Clear();
}
// 检查line事项是否存在
StringCacheItem item = (StringCacheItem)items[strEntry];
if (item == null)
{
item = new StringCacheItem();
item.Key = strEntry;
items.Add(strEntry, item);
}
Debug.Assert(item != null, "line在这里应该!=null");
return(item);
}
finally
{
#if NEWLOCK
this.m_lock.ExitWriteLock();
#else
this.m_lock.ReleaseWriterLock();
#endif
}
}
// 2012/10/6
// 获得读者摘要
/// <summary>
/// 获得读者摘要
/// </summary>
/// <param name="strPatronBarcode">读者证条码号</param>
/// <returns>读者摘要</returns>
public string GetPatronSummary(string strPatronBarcode)
{
string strError = "";
string strSummary = "";
int nRet = strPatronBarcode.IndexOf("|");
if (nRet != -1)
{
return("证条码号字符串 '" + strPatronBarcode + "' 中不应该有竖线字符");
}
// 看看cache中是否已经有了
StringCacheItem item = null;
item = Program.MainForm.SummaryCache.SearchItem(
"P:" + strPatronBarcode); // 前缀是为了和册条码号区别
if (item != null)
{
Application.DoEvents();
strSummary = item.Content;
return(strSummary);
}
string strXml = "";
string[] results = null;
long lRet = Channel.GetReaderInfo(stop,
strPatronBarcode,
"xml",
out results,
out strError);
if (lRet == -1)
{
strSummary = strError;
return(strSummary);
}
else if (lRet > 1)
{
strSummary = "读者证条码号 " + strPatronBarcode + " 有重复记录 " + lRet.ToString() + "条";
return(strSummary);
}
// 2012/10/1
if (lRet == 0)
{
return(""); // not found
}
Debug.Assert(results.Length > 0, "");
strXml = results[0];
XmlDocument dom = new XmlDocument();
try
{
dom.LoadXml(strXml);
}
catch (Exception ex)
{
strSummary = "读者记录XML装入DOM时出错: " + ex.Message;
return(strSummary);
}
// 读者姓名
strSummary = DomUtil.GetElementText(dom.DocumentElement,
"name");
// 如果cache中没有，则加入cache
item = Program.MainForm.SummaryCache.EnsureItem(
"P:" + strPatronBarcode);
item.Content = strSummary;
return(strSummary);
}