将对象转换为字符串

Question

Here's the content of my object:

-       tree    {ItemTree}  ItemTree
        id  "0" string
        im0 null    string
    -       item    Count = 1   System.Collections.Generic.List<ItemTree>
    -       [0] {ItemTree}  ItemTree
            id  "F_1"   string
            im0 "something.gif" string
    +       item    Count = 16  System.Collections.Generic.List<ItemTree>
                 parentId   "0" string
                 text   "someName"  string
  +                  Raw View       
                 parentId   null    string
                 text   ""  string

And I build it dynamically, so it's bigger.

It is an object from this class:

public class ItemTree
{
    public String id { get; set; }

    public String text { get; set; }

    public List<ItemTree> item { get; set; }

    public string im0 { get; set; }

    public String parentId { get; set; }
}

So, the class ItemTree has a property which itself is a List of ItemTree objects.

I want to convert this to string. When I make:

tree.ToString()

I only get:

        tree.ToString() "ItemTree"  string

But I want to convert the whole tree structure to string. How to do this?

Answer 1

You need to override the ToString() method in your class.

When you create a custom class or struct, you should override the ToString method in order to provide information about your type to client code.

You can use XmlSerializer to serialize your object to XML.

Answer 2

You need to override the ToString method and print your tree representation there

public class ItemTree
{
   public override string ToString()
   {
      return "Tree " + id +....
   }
}

otherwise you will always see class name as result of base ToString()

Answer 3

You can Override the ToString Method of your class ItemTree

Or May be you can try with serializing with json-net

string json = JsonConvert.SerializeObject(tree);

Answer 4

If you override the ToString method, your implementation will be used by other code that calls ToString, simply because it's a standard method (inherited from Object).

Optionally you can implement a new method.

Either way, to avoid manually updating your method, you can generate a string using Json.Net like this:

string str = JsonConvert.SerializeObject(someObject);

Here is a sample from the documentation :

Product product = new Product();

product.Name = "Apple";
product.ExpiryDate = new DateTime(2008, 12, 28);
product.Price = 3.99M;
product.Sizes = new string[] { "Small", "Medium", "Large" };

string output = JsonConvert.SerializeObject(product);
//{
//  "Name": "Apple",
//  "ExpiryDate": "2008-12-28T00:00:00",
//  "Price": 3.99,
//  "Sizes": [
//    "Small",
//    "Medium",
//    "Large"
//  ]
//}

Product deserializedProduct = JsonConvert.DeserializeObject<Product>(output);

Nuget package: http://nuget.org/packages/Newtonsoft.Json/