如何在TypeScrypt中使用C＃中的元组列表

Question

I want to get list of tuples from server and use them in TypeScript on client.

Problem is that I don't know how to declare list of tuples in TypeScript? Message property on client is null even when should not be.

This are list of tuples in entity on server

public IEnumerable<Tuple<string, string>> Messages { get; set; }

Return List of entities in Json (there are more properties but to simplify):

[  
   {  
      "id":93,
      "messages":[  
         {  
            "item1":"A1",
            "item2":"Hello"
         },
         {  
            "item1":"A2",
            "item2":"World"
         }
      ]
   },
   {  
      "id":94,
      "messages":null
   }
]

I try to create same property in TypeScript like this:

messages: { item1: string, item2: string }[];

All other properites are fine, problem is only with messages.

Answer 1

Your type should work. With the sample data, this has the expected output:

interface Item {
    id: number;
    messages: {
        item1: string;
        item2: string;
    }[];
}

let typed: Item[] = json;
for (const item of typed) {
    console.log(item.id);
    if(!item.messages) continue;
    for(const message of item.messages){
        console.log(`${message.item1} - ${message.item2}`)
    }   
}