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問題是TotalRows約爲71800,其中workList只返回718,這只是任務的第一個結果。我在那裏有WaitAll,但是一旦完成第一項任務,似乎就完成了。多線程列表AddRange
TotalRows = GetRowCount();
var lastRecord = 0;
List<tmpWBITEMALL> workList = new List<tmpWBITEMALL>();
for (int i = 0; i < 100; i++)
{
var tmpI = i;
gatherTmpTasks.Add(Task.Factory.StartNew(() =>
{
var context = new AS400_PIM5ContextDataContext();
context.CommandTimeout = 0;
int amount = (TotalRows/100);
int tmplastRecord = lastRecord;
Interlocked.Add(ref lastRecord, amount);
Console.WriteLine("Getting rows " + tmplastRecord+ " to " + (tmplastRecord + amount));
var pagedResult = context.ExecuteQuery<tmpWBITEMALL>("SELECT * FROM (SELECT ROW_NUMBER() OVER (ORDER BY Id) AS RowNum, * from tmpWBITEMALL) AS RowConstrainedResult WHERE RowNum >= " + tmplastRecord+ " AND RowNum < " + amount + " ORDER BY RowNum");
lock (listLock)
workList.AddRange(pagedResult);
context.Dispose();
}));
}
Task.WaitAll(gatherTmpTasks.ToArray());
Console.WriteLine("total work: " + workList.Count + " tasks: " + gatherTmpTasks.Count);
所以作爲參考gatherTmpTasks.Count返回100,但workList.Count只有718作爲listLock只是一個靜態的新的對象()。如果沒有注意到我正在使用LINQ to SQL
任何人都有想法,爲什麼我的列表與TotalRows的大小不一樣?
' 「AND ROWNUM <」 + amount':量始終是718,所以你問查詢總是在'tmplastRecord'和'718'之間返回,而不在'tmplastRecord'和'tmplastRecord + amount'之間。我認爲你只需要改成'「AND RowNum <」+(tmplastRecord + amount)' – Quantic
Omg。這很愚蠢...... –
供將來參考:如果你正在考慮多線程是一個問題,它通常會幫助嘗試它是否也發生*沒有*多線程第一:) – Luaan