How to use dynamic Linq with List object-CodePudding

I have List object of type dynamic like List<dynamic> but when I try to use it with Linq then it's not working. Below is my Linq syntax

var tt = lst.Where(x => (string)x.Type == "test");

So how can I use dynamic Linq on List having type as dynamic object.

It throws an error:

'System.Collections.Generic.List<object>' does not contain a definition for 'Type'

CodePudding user response：

Make sure you have declared the dynamic type correctly or is there any mismatch between the objects. I just tried the same thing and it works for me.

dynamic obj = new {
    Data = "sjds"
};

dynamic obj2 = new {
    Data = "sjdsf"
};

List<dynamic> dynamics = new List<dynamic>();
dynamics.Add(obj);
dynamics.Add(obj2);

var str = dynamics.Where(x => x.Data == "sjds");

If your case different than this you can share the full code to better understand the scenario.

CodePudding user response：

The compiler has no way to know what your dynamic objects look like. Therefore you need to tell the compiler by casting to a type. Since you're assuming that a particular property exists on your dynamic object (Type), you can try and cast it.

List<YourType> yourList = lst as List<YourType>;
if (yourList!=null){
  var filtereList = yourList.Where(x=>x.Type.Equals("test"));
}