.Net Core 3.0 JsonSerializer populate existing object

Question

I\'m preparing a migration from ASP.NET Core 2.2 to 3.0.

As I don\'t use more advanced JSON features (but maybe one as described below), and 3.0 now comes with a buil

Answer 1

I do not know much about this new version of the plug-in, however I found a tutorial that can be followed tutorial with some examples

Based on him I thought of this method and I imagine that he is able to solve his problem

//To populate an existing variable we will do so, we will create a variable with the pre existing data
object PrevData = YourVariableData;

//After this we will map the json received
var NewObj = JsonSerializer.Parse(jsonstring);

CopyValues(NewObj, PrevData)

//I found a function that does what you need, you can use it
//source: https://stackoverflow.com/questions/8702603/merging-two-objects-in-c-sharp
public void CopyValues(T target, T source)
{

    if (target == null) throw new ArgumentNullException(nameof(target));
    if (source== null) throw new ArgumentNullException(nameof(source));

    Type t = typeof(T);

    var properties = t.GetProperties(
          BindingFlags.Instance | BindingFlags.Public).Where(prop => 
              prop.CanRead 
           && prop.CanWrite 
           && prop.GetIndexParameters().Length == 0);

    foreach (var prop in properties)
    {
        var value = prop.GetValue(source, null);
        prop.SetValue(target, value, null);
    }
}