Error during string matching?

Question

I am trying to catch and exception message as below and running into below errors,can anyone provided inputs on how to fix this?is there a better way to handle string matching?

            catch (Exception ex)
            {
                ////catch
                {
                    if (ex.Message.Contains("Reading from the stream has failed", StringComparison.OrdinalIgnoreCase))
                    {
                        throw;
                    }

                    else
                    {
                        throw;
                    }

                }
      }

Error 1 Instance argument: cannot convert from 'string' to 'System.Linq.IQueryable'

Error 2 'string' does not contain a definition for 'Contains' and the best extension method overload 'System.Linq.Queryable.Contains(System.Linq.IQueryable, TSource, System.Collections.Generic.IEqualityComparer)' has some invalid arguments

Error 3 Argument 3: cannot convert from 'System.StringComparison' to 'System.Collections.Generic.IEqualityComparer' C:\Users\gnakkala\gnakkala_dashboard\source\qcom\qca\wconnect\wbit\automation\Dashboard\sandbox\Dashboard.Data.Repository\BuildRepositories\LookaheadGerritsRepository.cs

You should learn more about structured exception handling. Trying to parse an error message is not really the right way to go about it when you have other more robust methods available. — Sam Axe, Mar 27 '17 at 22:44
@weston: Actually, the `Message.Contains(...)` call is the code that causes the problem. — StriplingWarrior, Mar 27 '17 at 22:44

score 1 · Accepted Answer · answered Mar 27 '17 at 22:43

1

There is no string.Contains() method that takes a StringComparison. Most people end up using an IndexOf() call for this purpose.

answered Mar 27 '17 at 22:43

StriplingWarrior

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Warrior - please advise what method to use for string comparison – Jeff Short Mar 27 '17 at 22:45
@JeffShort: Did you look at the answer to the question I marked this as a duplicate of? http://stackoverflow.com/a/15464440/120955 – StriplingWarrior Mar 27 '17 at 22:47
I saw that and I am using the same... .`.contains` – Jeff Short Mar 27 '17 at 22:49
@JeffShort: [One good way](http://stackoverflow.com/a/444818/120955) is to use `.IndexOf("Reading from the stream has failed", StringComparison.OrdinalIgnoreCase) >= 0` – StriplingWarrior Mar 27 '17 at 22:54

Error during string matching?

1 Answers1