Checking if a list of objects contains a property with a specific value

Question

Say I have the following code:

class SampleClass {     public int Id {get; set;}     public string Name {get; set;} } List<SampleClass> myList = new List<SampleClass>(); //list is filled with objects ... string nameToExtract = "test"; 

So my question is what List function can I use to extract from myList only the objects that have a Name property that matches my nameToExtract string.

I apologize in advance if this question is really simple/obvious.

Answer 1

You can use the Enumerable.Where extension method:

var matches = myList.Where(p => p.Name == nameToExtract); 

Returns an IEnumerable<SampleClass>. Assuming you want a filtered List, simply call .ToList() on the above.

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By the way, if I were writing the code above today, I'd do the equality check differently, given the complexities of Unicode string handling:

var matches = myList.Where(p => String.Equals(p.Name, nameToExtract, StringComparison.CurrentCulture)); 

See also

Answer 2

myList.Where(item=>item.Name == nameToExtract)