CODEWITHSUNDEEP
c#linq
Huma Ali
Huma Ali

Reputation: 1809

Operator '&&' cannot be applied to operands of type 'bool' and 'System.Collections.Generic.IEnumerable<Feature>'

I'm trying First filter list and then using OrderBy but I'm getting following error on the Where clause

Operator '&&' cannot be applied to operands of type 'bool' and 'System.Collections.Generic.IEnumerable'

What's wrong with my query?

Offer internetOffer = offerList
                      .Where(x => (x.VerticalType == VerticalType.HighSpeedInternet) 
                      && (x.FeatureList
                          .Where(y => y.FeatureName == Const.CommonConstants.DOWNLOAD_SPEED_FEATURE_NAME)))
                          .OrderByDescending(y => y.Value);

Upvotes: 2

Views: 7817

Answers (3)

Sergey Kalinichenko
Sergey Kalinichenko

Reputation: 727047

x.FeatureList.Where(...) produces an IEnumerable<T> or IQueryable<T> of items in FeatureList that match the criteria. Since you are looking for a condition to see if there are any such items, use x.FeatureList.Any(...) instead:

Offer internetOffer = offerList
    .Where(x =>
             (x.VerticalType == VerticalType.HighSpeedInternet) 
          && (x.FeatureList.Any(y => y.FeatureName == 
              Const.CommonConstants.DOWNLOAD_SPEED_FEATURE_NAME))
           ).OrderByDescending(y => y.Value);

can you please tell how can I get the item from this list whose FeatureName is Const.CommonConstants.DOWNLOAD_SPEED_FEATURE_NAME and have the Max value of property Value?

Add FirstOrDefault to the call above:

Offer bestInternetOffer = offerList
    .Where(x =>
             (x.VerticalType == VerticalType.HighSpeedInternet) 
          && (x.FeatureList.Any(y => y.FeatureName == 
              Const.CommonConstants.DOWNLOAD_SPEED_FEATURE_NAME))
           )
           .OrderByDescending(y => y.Value)
           .FirstOrDefault();

The OrDefault part will protect your code from crashing when none of the offers has a feature named DOWNLOAD_SPEED_FEATURE_NAME.

Upvotes: 7

fubo
fubo

Reputation: 46005

The problem is that

x.FeatureList.Where(y => y.FeatureName == Const.CommonConstants.DOWNLOAD_SPEED_FEATURE_NAME)

returns a IEnumerable<Feature> instead of a boolean value.

assuming you want to check if there exists Any() you have to replace it by

x.FeatureList.Any(y => y.FeatureName == Const.CommonConstants.DOWNLOAD_SPEED_FEATURE_NAME)

Upvotes: 1

Steve
Steve

Reputation: 216353

Where returns an IEnumerable not a boolean, simply replace Where with Any

... x.FeatureList.Any(y => y.FeatureName == Const.CommonConstant.DOWNLOAD_SPEED_FEATURE_NAME)))....

Upvotes: 2

Related Questions