CODEWITHSUNDEEP
c#generics
Offir
Offir

Reputation: 3491

C# - Send type as parameter and return a type based on it

I have a function that receive a dynamic object and a type as string. I would like to cast the object to the type I have in my string.

 public void PostAutomaticRule(dynamic automaticRuleObject, string ruleType)
        {
            switch (ruleType)
            {
                case "Increase_budget":
                    ConvertToAutomaticRule(typeof(IncreaseBudgetRule), ref automaticRuleObject);
                    break;
            }
        }


 private void ConvertToAutomaticRule<T>(Type type, ref dynamic ruleObject)
        {
            var serializer = new System.Web.Script.Serialization.JavaScriptSerializer();
            var json = serializer.Serialize(ruleObject);
            var c = serializer.Deserialize<type>(json);
        }

The class I am trying to convert to:

 public class IncreaseBudgetRule
    {
        public string automaticRuleName { get; set; }
        public string givePrioity { get; set; }
    }

I have many rules types so I want that function to receive a type and a object and will return an object of the type I sent in the function. How can I accomplish that?

Upvotes: 1

Views: 2436

Answers (2)

Mark
Mark

Reputation: 3283

You don't need the type in your ConvertToAutomaticRule-Method. You defined there a generic paramter which you can use as the type of the outcome. As the Deserialize-Method also accepts a generic Argument you can rewrite your methods like this:

public void PostAutomaticRule(dynamic automaticRuleObject, string ruleType)
{
    switch (ruleType)
    {
        case "Increase_budget":
            ConvertToAutomaticRule<IncreaseBudgetRule>(ref automaticRuleObject);
            break;
    }
}


private void ConvertToAutomaticRule<T>(ref dynamic ruleObject)
{
    var serializer = new JavaScriptSerializer();
    var json = serializer.Serialize(ruleObject);
    var c = serializer.Deserialize<T>(json);
}

Edit (returning instead of using ref):

You can also use the generic parameter to set is as return type.

public void PostAutomaticRule(dynamic automaticRuleObject, string ruleType)
{
    switch (ruleType)
    {
        case "Increase_budget":
            var increasedBudgetRule = ConvertToAutomaticRule<IncreaseBudgetRule>(automaticRuleObject);
            break;
    }
}


private T ConvertToAutomaticRule<T>(dynamic ruleObject)
{
    var serializer = new JavaScriptSerializer();
    var json = serializer.Serialize(ruleObject);
    return serializer.Deserialize<T>(json);
}

Upvotes: 3

silver
silver

Reputation: 1703

try to change your generics to interfaces and that way you can do something like:

    var JsonSerializerSettings = new JsonSerializerSettings { TypeNameHandling = TypeNameHandling.Auto };

            var deserializedObject = JsonConvert.DeserializeObject<IYourAutoSerializedObject>(automaticRuleObject.ToString(), JsonSerializerSettings);

Upvotes: 0

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