How can I transfer a collection of JSON objects from JavaScript to C#?

Feeling a bit confused here. I have some Javascript code that will generate JSON data like the following:

{type:"book"     , author: "Lian", Publisher: "ABC"}
{type:"Newspaper", author: "Noke"}

This is just one example, I actually have more data than this.

Because there are common fields among different JSON objects, I'm not sure if it's possible to pass them all to C# at once. My goal is to pass this data to C#, perform some operations on it. What would be the best approach to achieve this? I'm working with ASP.NET MVC2.

Thank you in advance for any answers or suggestions.

Answer №1

Combining the two JSON statements above results in invalid JSON format, preventing the use of JavaScriptSerializer class for direct deserialization into a C# structure. Manual parsing is required to either transform it into valid JSON or perform complete manual parsing.

To ensure compatibility, I recommend transmitting valid JSON data like this:

{list: [
    {type:"book", author: "Lian", Publisher: "ABC"},
    {type:"Newspaper", author: "Noke"} ]

The best approach may vary based on your specific requirements. You can easily transfer this data using a conventional 'ajax' request. While traditional methods work, utilizing JS libraries offer simpler constructs and cater to cross-browser inconsistencies.

Considering ASP.NET MVC2 usage, jQuery is recommended as Microsoft endorses it as the default JS library for new web projects.

Upon passing the aforementioned JSON to C#, deserializing it requires the following steps:

JavaScriptSerializer serializer = new JavaScriptSerializer();
var result = serialzer.Deserialize<Dictionary<string, object>>(postedJSONData);

In C#, the resulting structure will resemble:

Dictionary<string, object> result =>
    { "list" => object },
                object => List<object>,
                          List<object> => Dictionary<string, object>
                                          { "type" => "book", "author" => "Lian" } // etc

Answer №2

[
    {type:"movie"     , director: "Smith", Studio: "XYZ"},
    {type:"Magazine", editor: "Jane"}
]

This structure is still valid JSON format (although keys should be enclosed in quotes as well), allowing you to use .push() to add a new record to the array each time you create one.

var collection = [];
// code for other operations
collection.push({type:"movie"     , director: "Smith", Studio: "XYZ"});
// more code for other operations
collection.push({type:"Magazine", editor: "Jane"})

Once you have completed building your JSON collection, you can send it to the backend altogether.

Answer №3

If you want to deserialize your own custom type, you can use the JavaScriptSerializer. Simply create a simple type with all the properties of your JSON objects and then execute the following code:

JavaScriptSerializer serializer = new JavaScriptSerializer();
MyType result = serialzer.Deserialize<MyType>(JsonData);

You also have the option to deserialize an array:

MyType[] result = serialzer.Deserialize<MyType[]>(JsonData);

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