How to write a LINQ statement to get files with specific extensions from a dynamic list?

Question

I have a list of dynamic objects

List myDynamicList;

where one item would look similar to below:

dynamic d = ne         


        

Answer 1

web.config


<configuration>
   ....
   <appSettings>
      <add key="ExtensionArray" value="dll,exe"/>
   </appSettings>
   ....
</configuration>


C# snippet

string ExtensionArray== WebConfigurationManager.AppSettings["Extension"];

var list=ExtensionArray.Split(',').ToList<string>();

var libraries = myDynamicList.Where(d => list.Any(e=>e==Path.GetExtension(d.FileName)))
                              .Select(d => d.FileName);

Answer 2

You can use a list to save all the extension that you need and use Contains extension method in your query:

var list=new List<string>(){".dll", ".exe"};
var libraries = myDynamicList.Where(d => list.Contains(Path.GetExtension(d.FileName)))
                             .Select(d => d.FileName);

You can also use Any extension method:

 var libraries = myDynamicList.Where(d => list.Any(e=>e==Path.GetExtension(d.FileName)))
                              .Select(d => d.FileName);