How return empty string, if the result is null [duplicate]

Question

return results.Select(x => new {                
            VillageName = x.VillageName,
            GroupID = x.GroupID,
            GroupName = x.GroupName,
            CenterID = x.CenterID,
            CenterName = x.CenterName,
        }).ToList<object>();

if CenterName and group name is null. Need to return an empty string In c# 6.0, x?.CenterName -> return null value — Prasad Mahanti
– Prasad Mahanti, Commented Sep 10, 2019 at 4:28
I assume the ?? isnt working for you in this scenario? x?.CenterName ?? "" — David Pilkington
– David Pilkington, Commented Sep 10, 2019 at 4:31

aloisdg · Accepted Answer · 2019-09-10 05:42:56Z

1

You can use the null-coalescing operator

x?.CenterName ?? string.Empty

edited Sep 10, 2019 at 5:42

aloisdg

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answered Sep 10, 2019 at 5:38

David Pilkington

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Comments

anil shrestha · Accepted Answer · 2020-05-31 13:13:27Z

-1

You can implement C# ternary (? :) Operator. The syntax of ternary operator is:

Condition ? Expression1 : Expression2;

The Expressions below first checks for null conditions and if the condition is null, the value is set to empty.

return results.Select(x => new {                
            VillageName = x.VillageName,
            GroupID = x.GroupID,
            GroupName = x.GroupName  == null ? "" : x.GroupName,
            CenterID = x.CenterID,
            CenterName = x.CenterName == null ? "" : x.CenterName,
        }).ToList<object>();

or else you can use "The null-coalescing operator(??)" like:

CenterName = x.CenterName ?? "", //check and returns empty string if CenterName is null

edited May 31, 2020 at 13:13

answered Sep 10, 2019 at 5:25

anil shrestha

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1 Comment

anil shrestha Over a year ago

This code works well. I am even applying same method but how come people down vote my answer without even analyzing and testing it. Addition of comment for down vote with your reason would be greater. And yes this code works well.

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