Convert querystring from/to object

Question

I have this (simplified) class:

public class StarBuildParams {     public int BaseNo { get; set; }     public int Width { get; set; } } 

And I have to transform instances of it to a querystring like this:

"BaseNo=5&Width=100" 

Additionally I have to transform such a querystring back in an object of that class.

I know that this is pretty much what a modelbinder does, but I don't have the controller context in my situation (some deep buried class running in a thread).

So, is there a simple way to convert a object in a query string and back without having a controller context?

It would be great to use the modelbinding but I don't know how.

Answer 1

A solution with Newtonsoft Json serializer and linq:

string responseString = "BaseNo=5&Width=100"; var dict = HttpUtility.ParseQueryString(responseString); string json = JsonConvert.SerializeObject(dict.Cast<string>().ToDictionary(k => k, v => dict[v])); StarBuildParams respObj = JsonConvert.DeserializeObject<StarBuildParams>(json); 

Answer 2

You can use reflection, something like this:

public T GetFromQueryString<T>() where T : new(){     var obj = new T();     var properties = typeof(T).GetProperties();     foreach(var property in properties){         var valueAsString = HttpContext.Current.Request.QueryString[property.PropertyName];         var value = Parse( valueAsString, property.PropertyType);          if(value == null)             continue;          property.SetValue(obj, value, null);     }     return obj;  } 

You'll need to implement the Parse method, just using int.Parse, decimal.Parse, DateTime.Parse, etc.