How to handle exception raised in linq

Question

gyus! Suppose I have such simple LINQ expression

IEnumerable res =
    from rqResult in MatchesList
    select new StopListMat         


        

Answer 1

Use the TryParseExact method to avoid not needed exceptions.
I don't understand why you can't use the try-catch block? You really think it is not raised? Also you should check your database for the NULL-values:

MatchDate = Convert.IsDBNull (rqResult.Row["MatchDate"]) ?   
  DateTime.MinValue : 
  DateTime.ParseExact(rqResult.Row["MatchDate"].ToString(),
    "dd.MM.yyyy HH:m:ss", 
    fmtInfo),
Remark = (string)rqResult.Row["Remark"] ?? String.EmptyString;

Answer 2

Because of deferred execution the query is not executed until you evaluate the query, such as by making use of the .ToList() method. The exception will be thrown at that time only.

To avoid the problem you need to modify the query. something as below

IEnumerable<StopListMatchViewModel> res =
    from rqResult in MatchesList
    select new StopListMatchViewModel
    {
        MatchDate = DateTime.ParseExact(
            ((rqResult.Row["MatchDate"]==null) ?
                rqResult.Row["MatchDate"] : DateTime.MinValue).ToString(), "dd.MM.yyyy HH:m:ss", fmtInfo),
        Remark = rqResult.Row["Remark"].ToString()
    }

Note : DateTime.MinValue is used when the value of rqResult.Row["MatchDate"] is null which used to avoid null