Asp.Net。從數據集

Question

我想從獲取數據集中的最小日期查找最小的日期，但該代碼並不在不同時期賦予最小日期。請給我建議一些方式..

Report.StartDate = DateTime.Parse(ds.Tables[0].Compute("MIN([" + c.ColumnMap + "])", "").ToString()); 

Answer 1

試試這個代碼 -

DateTime minDate = DateTime.MaxValue; 
    DateTime maxDate = DateTime.MinValue; 
    foreach (string dateString in StringDates) 
    { 
     DateTime date = DateTime.Parse(dateString); 
     if (date < minDate) 
      minDate = date; 
     if (date > maxDate) 
      maxDate = date; 
    } 

OR

//Retrieve Minimum Date 
    var MinDate = (from d in dataRows select d.Date).Min(); 

    //Retrieve Maximum Date 
    var MaxDate = (from d in dataRows select d.Date).Max();