Question

目前我正在开发一个从TFS获取信息的项目试图建立一个自定义工具

我决定提高该工具的性能，并且使用Parallel选项（.Net 4 +）遇到了1个问题

备注：我已尝试在查询结果和项目上放置安全线程，但它没有帮助代码示例位于底部

我正在尝试执行下一个代码：

    WorkItemCollection queryResults;
//Query run to populate the collection
                    Parallel.ForEach<WorkItem>(queryResults.Cast<WorkItem>(), item => {
                    Console.WriteLine(item.Fields.GetById(AttributeCode.Default.RemainingWork).Value);
        });

错误引用：

Microsoft.TeamFoundation.WorkItemTracking.Proxy.dll中出现“Microsoft.TeamFoundation.TeamFoundationServiceUnavailableException”类型的异常，但未在用户代码中处理

从Exception Catch记录：

mscorlib.dll中出现'System.InvalidOperationException'类型的第一次机会异常 System.InvalidOperationException：集合已被修改;枚举操作可能无法执行。在System.ThrowHelper.ThrowInvalidOperationException（ExceptionResource资源）在System.Collections.Generic.Dictionary 2.KeyCollection.Enumerator.MoveNext() at Microsoft.TeamFoundation.WorkItemTracking.Client.PagingFieldReader.ProcessFields(Int32 row, IEnumerable 1 fieldIds，Dictionary 2 fields) at Microsoft.TeamFoundation.WorkItemTracking.Client.PagingFieldReader.ProcessRevision(Int32 row, Dictionary 2 rowMap，Dictionary 2 plainFields, Dictionary 2 textFields）在Microsoft.TeamFoundation.WorkItemTracking.Client.PagingFieldReader.Read（Int32 row，Int32 [] fields）在Microsoft.TeamFoundation.WorkItemTracking.Client.WorkItemCollection.QueryFieldValues（Int32 index，Int32 [] fields）在Microsoft.TeamFoundation.WorkItemTracking.Client.WorkItem.get_IsAccessDenied（）在Microsoft.TeamFoundation.WorkItemTracking.Client.WorkItem.QueryFieldValue（Int32字段）在Microsoft.TeamFoundation.WorkItemTracking.Client.WorkItemFieldData.GetFieldValue（Int32 id，Int32 revision）在Microsoft.TeamFoundation.WorkItemTracking.Client.WorkItem.CheckUpdateCachedData（）在Microsoft.TeamFoundation.WorkItemTracking.Client.WorkItem.get_Type（）在Microsoft.TeamFoundation.WorkItemTracking.Client.WorkItem.get_Fields（）

对项目进行阻止保护，不确定我是否做得对：

WorkItemCollection queryResults;
    //Query run to populate the collection
        BlockingCollection<WorkItem> bc = new BlockingCollection<WorkItem>();
        WorkItem temp;
        Parallel.ForEach<WorkItem>(queryResults.Cast<WorkItem>(), item =>
        {
            bc.Add(item);
            if (bc.TryTake(out temp))
                Console.WriteLine(temp.Fields[CoreField.CreatedBy]);
        });

错误：

mscorlib.dll中出现'System.InvalidOperationException'类型的第一次机会异常 mscorlib.dll中发生了'System.InvalidOperationException'类型的第一次机会异常 System.InvalidOperationException：集合已被修改;枚举操作可能无法执行。在System.ThrowHelper.ThrowInvalidOperationException（ExceptionResource资源）在System.Collections.Generic.Dictionary 2.KeyCollection.Enumerator.MoveNext() at Microsoft.TeamFoundation.WorkItemTracking.Client.PagingFieldReader.ProcessFields(Int32 row, IEnumerable 1 fieldIds，Dictionary 2 fields) at Microsoft.TeamFoundation.WorkItemTracking.Client.PagingFieldReader.ProcessRevision(Int32 row, Dictionary 2 rowMap，Dictionary 2 plainFields, Dictionary 2 textFields）在Microsoft.TeamFoundation.WorkItemTracking.Client.PagingFieldReader.Read（Int32 row，Int32 [] fields）在Microsoft.TeamFoundation.WorkItemTracking.Client.WorkItemCollection.QueryFieldValues（Int32 index，Int32 [] fields）在Microsoft.TeamFoundation.WorkItemTracking.Client.WorkItem.get_IsAccessDenied（）在Microsoft.TeamFoundation.WorkItemTracking.Client.WorkItem.QueryFieldValue（Int32字段）在Microsoft.TeamFoundation.S-QA Tasks.exe中出现类型'System.InvalidOperationException'的第一次机会异常 WorkItemTracking.Client.WorkItemFieldData.GetFieldValue（Int32 id，Int32 revision）在Microsoft.TeamFoundation.WorkItemTracking.Client.WorkItem.CheckUpdateCachedData（）在Microsoft.TeamFoundation.WorkItemTracking.Client.WorkItem.get_Type（）在Microsoft.TeamFoundation.WorkItemTracking.Client.WorkItem.get_Fields（） System.InvalidOperationException：集合已被修改;枚举操作可能无法执行。在System.ThrowHelper.ThrowInvalidOperationException（ExceptionResource资源）在System.Collections.Generic.Dictionary 2.KeyCollection.Enumerator.MoveNext() at Microsoft.TeamFoundation.WorkItemTracking.Client.PagingFieldReader.ProcessFields(Int32 row, IEnumerable 1 fieldIds，Dictionary`2 fields）在Microsoft.TeamFoundation.WorkItemTracking.Client.PagingFieldReader.ProcessRevision（Int32 row，D

C＃Parallel ForEach未处理的WorkItem用户代码字段信息Retriving

0 个答案: