delete json element in a array of json c#

Question

I have an array of json from the server. Like

ArrayExp = [
  {
    "id" : "number",
    "name" : "a name",
    ...
  }, 
  {
    "id" : "number",
    "name" : "a name",
    ...
  },
...
];

And I want to remove a "id" from all of the Array. I am trying with:

for (int i = 0; i < ArrayExp.Length; i++) {
    ArrayExp[i].id // I don't know how to remove it!
}

Can anyone help me?

@HenkHolterman In c# you can do a loop like in js. The array is an example and I can do the ArrayExp[i].id to select the id from the object in c# . What do you mean? — Rabegi
– Rabegi, Commented Mar 16, 2018 at 11:47
@AamirNakhwa But I want to remove only the "id" in all object, not all of the object — Rabegi
– Rabegi, Commented Mar 16, 2018 at 11:50
I mean that [{"id" : "number", won't compile in C#. Post the actual class(es). Best to write a minimal reproducible example. — Henk Holterman
– Henk Holterman, Commented Mar 16, 2018 at 11:52

tchelidze · Accepted Answer · 2018-03-16 11:48:01Z

1

ArrayExp elements are objects of anonymous type.

In order to remove property on it, you should map each element into new one without id.

var newArrayExpr = 
          ArrayExp
              .Select(it => new { it.name, ... });

answered Mar 16, 2018 at 11:48

tchelidze

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1 Comment

Rabegi Over a year ago

it could be ok but I don't know if in the future the elements would change, I need do it without the name of elements... Only the "id" name

Tuki · Accepted Answer · 2018-04-07 11:45:25Z

I used ExpandoObject from System.Dynamic, hope it helps you

public static void Main()
{
    var arrayExp = GetArray();
    var newCollection = ArrayExp.ToList().Select(x => RedefineObject(x, "Id"));
}

static object[] GetArray()
{
    var person1 = new { Name = "name", Id = 1 };
    var person2 = new { Name = "name", Id = 2 };
    var person3 = new { Name = "name", Id = 3 };
    return new[] { person1, person2, person3 };
}

static object RedefineObject(object obj, string propertyToRemove)
{
    var properties = obj.GetType().GetProperties().Where(x => x.Name != propertyToRemove);

    var dict = new Dictionary<string, object>();
    var eobj = new ExpandoObject();
    var eoColl = (ICollection<KeyValuePair<string, object>>)eobj;

    properties.ToList().ForEach(x => dict.Add(x.Name, x.GetValue(obj)));

    dynamic dynObj = dict;
    return dynObj;
}

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