// 修改集合中每个元素的 ElementSetName
static void SetElementSetName(RecordCollection records,
string strElementSetName)
{
if (records == null)
{
return;
}
foreach (DigitalPlatform.Z3950.Record record in records)
{
// 非诊断记录
if (record.m_nDiagCondition == 0)
{
record.m_strElementSetName = strElementSetName;
}
}
}
// 获得记录
// 确保一定可以获得nCount个
// parameters:
// nStart 获取记录的开始位置(从0开始计数)
// nPreferedEachCount 推荐的每次条数。这涉及到响应的敏捷性。如果为-1或者0，表示最大
public async Task <PresentResult> Present(
string strResultSetName,
int nStart,
int nCount,
int nPreferedEachCount, // 推荐的每次条数。这涉及到响应的敏捷性
string strElementSetName,
string strPreferredRecordSyntax)
{
if (nCount == 0)
{
return new PresentResult {
Value = 0, ErrorInfo = "nCount 参数为 0，本次没有真正请求服务器获取记录"
}
}
;
RecordCollection records = new RecordCollection();
int nGeted = 0;
for (; ;)
{
int nPerCount = 0;
if (nPreferedEachCount == -1 || nPreferedEachCount == 0)
{
nPerCount = nCount - nGeted;
}
else
{
nPerCount = Math.Min(nPreferedEachCount, nCount - nGeted);
}
// this.Stop.SetMessage("正在获取命中结果 ( " + (nStart + nGeted + 1).ToString() + "-" + (nStart + nGeted + nPerCount).ToString() + " of " + this.ResultCount + " ) ...");
// RecordCollection temprecords = null;
PresentResult result = await OncePresent(
strResultSetName,
nStart + nGeted,
nPerCount,
strElementSetName,
strPreferredRecordSyntax);
if (result.Value == -1)
{
return(result);
}
if (result.Records == null)
{
break;
}
nGeted += result.Records.Count;
if (result.Records.Count > 0)
{
records.AddRange(result.Records);
}
if (nGeted >= nCount || result.Records.Count == 0)
{
break;
}
}
return(new PresentResult {
Records = records
});
}