Check for Values in Linq Query

lesponce 176 Reputation points
2022-09-23T17:22:30.697+00:00

I got a query that is working fine checking for a value inside the query. However, now I need to check for multiple values coming from a string. The values in the string came from an array.

In this example: a.FieldName is equal to 'ABC'
For example in my linq query this wokrs fine: FieldName = a.FieldName = ?? "",

Now, I need to check for multiple values. If it would be an IF statement, I can use OR contidition.
The value that I need to handle is like this: p1.FieldName is 'ABC,XYZ,FYZ'.

How can I accomplish this? As it could have multiple values, it can have just one, or empty (no value).

The code goes like this:

var MyVariable = period1.Join(  
period2,  
p1 => p1.field1,  
p2 => p2.field1,  
(p1, p2) => new MyClass()  
{  
    FieldName = p1.FieldName ?? "",     // This works with one value. I need it to handle multi values.  
   AnotherField = p1.AnotherField ?? ""  
}  
).ToList();  
  
.NET
.NET
Microsoft Technologies based on the .NET software framework.
3,447 questions
C#
C#
An object-oriented and type-safe programming language that has its roots in the C family of languages and includes support for component-oriented programming.
10,362 questions
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Accepted answer
  1. Jack J Jun 24,296 Reputation points Microsoft Vendor
    2022-09-26T07:47:37.37+00:00

    @lesponce , Welcome to Microsoft Q&A, I recommend that you used ternary conditional operator to check if the value is equal to the item from the array.

    Here is a code example you could refer to.

    code.txt

    Result:

    244713-image.png

    Hope this could help you.

    Best Regards,
    Jack


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