如何使用 C# 类中的 JsonProperty 属性访问变量的值？

Question

I have this class:

public class Configuration
{
   [JsonProperty("B_C.Parameter.fixtureHeight")]
   public string BCParameterfixtureHeight { get; set; }
}

I want to access the value of BCParameterfixtureHeight using its JsonProperty name of B_C.Parameter.fixtureHeight .

I've tried this which I think should work:

Configuration config = new Configuration();
config.BCParameterfixtureHeight = "1";

var a = [config].GetType().GetProperties().FirstOrDefault(p => 
p.GetCustomAttributes<JsonPropertyAttribute>().Any(at => 
at.PropertyName.Equals("B_C.Parameter.fixtureHeight")));

However, I'm getting a "Compiler Error CS1525" and a red line under the opening bracket in [config]. The compiler is saying

"Invalid expression term '['."

Answer 1

The brackets you put around config are the problem.

You should write:

var a = config.GetType() //...

EDIT:

As Chris Schaller mentionned in the comments, you can fix your initial errors by giving the expeted arguments to GetCustomAttributes .

     var a = config.GetType().GetProperties().FirstOrDefault(p => 
        p.GetCustomAttributes(typeof(JsonPropertyAttribute), false).Any(at => at is JsonPropertyAttribute && (at as JsonPropertyAttribute).PropertyName.Equals("B_C.Parameter.fixtureHeight"))
     );