Dynamically assign object properties and values in c#

Question

Help me to create single object with dynamic properties.

For example: Suppose we are getting the following object from database,

var obj=[ 
{"name":"John", "age":35}, 
{"name":"Greesham", "age":37},
{"name":"Raman","age":42},
{"name":"Krish", "age":30}];

Now we want to create an object with above object values as keys/properties in c# class.

Expected Result:

var obj2=new{ John=35, Greesham=37, Raman=42, Krish=30 };

[Note: Here i can use IDictionary but i want only one object, to pass templater plugin to print in word document]

Thanks in advance.

What have you tried so far and what seems to be the problem? — Xerillio, Jul 15 '22 at 18:16
You can use the `dynamic` keyword. But why you would want an object like that, I don't know. Seems like an XY problem — Jonesopolis, Jul 15 '22 at 18:17
Also, what is the purpose of such a dynamic object? What problem are you trying to solve like this? — Xerillio, Jul 15 '22 at 18:17
It seems like using a `dictionary` would save you a lot of trouble here — Erik McKelvey, Jul 15 '22 at 18:18
It looks like you want a `Dictionary` with name as key and age as value — Magnetron, Jul 15 '22 at 18:18
_[Note: Here i can use IDictionary but i want only one object, to pass templater plugin to print in word document]_ The plugin is your own? If so, yo can adapt, if not, what type does it expect? — Magnetron, Jul 15 '22 at 18:23
You can also use ExpandoObject if you are set on setting properties on the go. There are several possibilities with trade offs. — DasKrümelmonster, Jul 15 '22 at 18:24
@Magnetron We have a nuget package "templater" used for print data in word file, it accepts one object with properties, — Shabbir G, Jul 15 '22 at 18:52
C# also has the `dynamic` variables and the `ExpandoObject`. You can add anything to them and retrieve them again but it's not strong typed. Use them sparingly. — Paul Sinnema, Jul 15 '22 at 19:35

Serge · Answer 1 · 2022-07-15T22:59:48.207

try this

Dictionary<string, int> obj2 = JArray.Parse(obj)
                                   .ToDictionary(
                                   ja => (string)ja["name"],
                                   ja => (int) ja["age"]
                                   );

but if you want complitely independent from property names

Dictionary<string, object> obj2 = JArray.Parse(obj)
                                 .ToDictionary(
                                 ja => (string)((JObject)ja).Properties().ToArray()[0].Value,
                                 ja => (object) ((JObject)ja).Properties().ToArray()[1].Value
                                 );

Dynamically assign object properties and values in c#

1 Answers1