C# 从DataTable-C中的DataRows中选择并提取值

我有一个接受这些参数的方法：

public bool CalculateProvent(ArrayList UPs, 
                             ArrayList DateExtraction, 
                             DataTable SourceData

{

...
...
}

SourceData datatable包含以下内容，例如：

UP - DateExtraction - Energy1 - Energy2 - Consumption1 - Consumption2 - etc

Decimal myEnergy1, myEnergy2, myConsumption1, myConsumption2

foreach(int up in UPs)
{
    foreach(DateTime myTime in DateExtraction)
  {

   // Here I have to select the correct row and extract my fields
  }

}

有一些价值观：

780 - 2011-11-12 14:00:00 - 30.50 - NULL - NULL - 12.00
780 - 2011-11-12 15:00:00 - 31.50 - NULL - 10 - 12.00
781 - 2011-11-12 14:00:00 - NULL - 6 - NULL - 12.00
...

我必须基于UPs和DataExtraction arraylist迭代此datatable，以提取所需的字段值Energy1，等等

例如：

UP - DateExtraction - Energy1 - Energy2 - Consumption1 - Consumption2 - etc

Decimal myEnergy1, myEnergy2, myConsumption1, myConsumption2

foreach(int up in UPs)
{
    foreach(DateTime myTime in DateExtraction)
  {

   // Here I have to select the correct row and extract my fields
  }

}

如何在此迭代中选择正确的值？

尝试以下方法：

foreach(int up in UPs)
{
  foreach(DateTime myTime in DateExtraction)
  {
    DataRow[] myRows = SourceData.Select("UP=" + up + " AND DateExtraction='" + myTime.ToString() + "'");

    if(myRows != null && myRows.Length == 1)
    {
      // here is your row... myRows[0]
    }
  }
}

---

当然，应该改进并注意myTime.ToString格式。当然，这也可以通过使用漂亮、紧凑的LINQ数据集来实现，我想这样的东西可能正是您想要的

var q = from up in UPs.Cast<int>()
        from myTime in DateExtraction.Cast<DateTime>()
        join r in SourceData.AsEnumerable() on 
          new { r.Field<int>("UP"), r.Field<DateTime>("DateExtraction")} equals
          new { up, myTime }
        select new
        {
           Energy1 = r.Field<Decimal>("Energy1"),
           Energy2 = r.Field<Decimal>("Energy2")
        };

---

你为什么以{$Detity}的名义使用ArrayList？你没有解释正确的行是什么以及如何找到它。你能告诉我们从数据库读取数据的代码部分吗？