我想從ThreadPool中使用QueueUserWorkItem。當我使用下面的代碼時,一切正常。ThreadPool QueueUserWorkItem with list
private int ThreadCountSemaphore = 0;
private void (...) {
var reportingDataList = new List<LBReportingData>();
ThreadCountSemaphore = reportingDataList.Count;
using (var autoResetEvent = new AutoResetEvent(false)) {
ThreadPool.QueueUserWorkItem((o) => this.FillReportingData(settings, reportingDataList[0], autoResetEvent));
ThreadPool.QueueUserWorkItem((o) => this.FillReportingData(settings, reportingDataList[1], autoResetEvent));
ThreadPool.QueueUserWorkItem((o) => this.FillReportingData(settings, reportingDataList[2], autoResetEvent));
}
}
private void FillReportingData(...) {
if (Interlocked.Decrement(ref this.ThreadCountSemaphore) == 0) {
waitHandle.Set();
}
}
但是,當我使用列表而不是單個方法調用,然後我的程序崩潰沒有例外。
private void (...) {
var reportingDataList = new List<LBReportingData>();
ThreadCountSemaphore = reportingDataList.Count;
using (var autoResetEvent = new AutoResetEvent(false)) {
ThreadPool.QueueUserWorkItem((o) => this.FillReportingData(settings, reportingDataList[i], autoResetEvent));
}
}
我錯了什麼?我應該改變什麼?
更新
對不起,我做了在代碼中的錯誤。我在VS2010中使用.NET 2.0。 下面是完整的代碼:
private int ThreadCountSemaphore = 0;
private IList<LBReportingData> LoadReportsForBatch() {
var reportingDataList = new List<LBReportingData>();
var settings = OnNeedEntitySettings();
if (settings.Settings.ReportDefinition != null) {
var definitionList = new List<ReportDefinitionen> { ReportDefinitionen.OrgStatus, ReportDefinitionen.Mittelwerte, ReportDefinitionen.Verteilungsstatistik };
using (var autoResetEvent = new AutoResetEvent(false)) {
foreach (var reportDefinition in definitionList) {
foreach (DataRow row in settings.Settings.ReportDefinition.Select("AuswertungsTyp = " + (int)reportDefinition)) {
reportingDataList.Add(new LBReportingData { SourceData = row, ReportType = reportDefinition });
}
}
ThreadCountSemaphore = reportingDataList.Count;
foreach(var reportingDataItem in reportingDataList) {
ThreadPool.QueueUserWorkItem((o) => this.FillReportingData(settings, reportingDataItem, autoResetEvent));
}
autoResetEvent.WaitOne();
}
}
return reportingDataList;
}
private void FillReportingData(IEntitySettings<DSLBUReportDefinition> settings, LBReportingData reportingData, AutoResetEvent waitHandle){
DoSomeWork();
if (Interlocked.Decrement(ref this.ThreadCountSemaphore) == 0) {
waitHandle.Set();
}
}
感謝
非常不清楚,「我」的價值應該從哪裏來? – 2010-09-15 17:29:27
如果這是C#,則省略號不是允許的參數。因此,爲了更好地解決此問題,我們需要知道您爲'FillReportingData'聲明的參數類型。另外,在示例2中,您仍然只傳遞一個「LBReportingData」對象,而不是整個列表。 – 2010-09-15 17:31:21