C# Is it possible to get actual type out of a string representing that type? [duplicate]

问题

This question already has answers here:

Type.GetType(“namespace.a.b.ClassName”) returns null (16 answers)

C# Getting Type out of a string variable and using it in generic method (3 answers)

Closed 10 months ago.

I have string "Car", and I would like to get the type Car from it. My class Car is:

namespace MySolution.MyProjectA
{
    public class Car
    {
      ...
    }
}

I trying getting type like this but it returns null:

Type myType = Type.GetType("MySolution.MyProjectA.Car"); // returns null

Given a string variable representing my type (i.e. "Car"), how do I get its Type Car?

UPDATE AND SOLUTION

Thanks to suggestion from @AsafPala here (Type.GetType("namespace.a.b.ClassName") returns null), I got it to work. Turns out if you are calling GetType from another project in your solution (which is another assembly), you have to provide also assembly name.

Since MySolution has 2 project MyProjectA and MyProjectB, these are 2 separate projects (or assemblies) in same solution so you need to provide fully specified assembly name of your type (that is MySolution.MyProjectA.Car) and assembly name (that is MySolution.MyProjectA) as comma separated as below:

Type myType = Type.GetType("MySolution.MyProjectA.Car,MySolution.MyProjectA");

UPDATE AND SOLUTION

Since I am calling this code in another project (which is same as assembly), I need to provide fully specified type name and assembly name as comma separated like so:

namespace MySolution.MyProjectB
{
    public class MyClass
    {
        ...
        ...
        public void MyMethod()
        {
             // this wont work, I get null back
             //Type myType = Type.GetType("MySolution.MyProjectA.Car");
             Type myType = Type.GetType("MySolution.MyProjectA.Car,MySolution.MyProjectA"); //this works
             ...
        }
    }
}

回答1:

Yes. You need to serialize the object to a string first. You can use json or xml as the serializer type.

Then on the other side you use the same serializer object to deserialize the string into an instance of your class.

https://www.newtonsoft.com/json/help/html/DeserializeObject.htm

Account account = JsonConvert.DeserializeObject<Account>(json);

http://www.janholinka.net/Blog/Article/11

XmlSerializer serializer = new XmlSerializer(typeof(List), new XmlRootAttribute("Products"));

StringReader stringReader = new StringReader(xmlString);

List productList = (List)serializer.Deserialize(stringReader);

And then after you deserialize you can get the Type of the object

来源：https://stackoverflow.com/questions/54681389/c-sharp-is-it-possible-to-get-actual-type-out-of-a-string-representing-that-type

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