遍历JSON数组并将项目添加到列表C# [英] Looping through JSON array and adding items to list C#

问题描述

很抱歉，我是个初学者，试图找到我的问题，但没能

Sorry for basic question, I'm beginner and tried to find my problem, but wasn't able to

string json = "{\"EmailList\":[{\"name\":\"John Bravo\",\"email\":\"[e-mail]\"},{\"name\":\"Daniel Alutcher\",\"email\":\"[e-mail]\"},{\"name\":\"James Rodriguez\",\"email\":\"[e-mail]\"}]}";

JObject rss = JObject.Parse(json);

var data = JsonConvert.DeserializeObject<dynamic>(json);

dynamic emails = data.EmailList;

List<string> emailList = new List<string>();

foreach (dynamic item in emails)
{
    int x = 0;
    if (item.email != null)
    {
        Console.WriteLine(item.email);
        //emailList.Add(item.email); // throws exception System.Collections.Generic.List<string>.Add(string)' has some invalid arguments' 
    }
}

所以我通过这个JSON循环，我可以在控制台中获取每封电子邮件，但是当我尝试将其添加到列表中时，会引发异常错误

So I'm looping trough this JSON and I'm able to get in console each email, but when I'm trying to add it to a list, it's throwing exception error

推荐答案

正如您评论"IS可以通过任何方式避免动态"在此代码中?" .

好吧，这很简单，这是过去的简单复制！
在Visual Studio中，使用顶部栏中特殊的过去菜单(图像).
或使用 app.quicktype.io 或

Well there is and it's pretty simple, It's a simple copy past!
In Visual Studio using the special past in top bar menu (image).
Or in an online tool like app.quicktype.io or json2csharp.com.

using  Newtonsoft.Json;

public partial class JsonData //Give it a better name
{
       [JsonProperty("EmailList")] public List<EmailInformation> EmailList { get; set; }
}

public partial class EmailInformation
{
       [JsonProperty("name")]  public string Name { get; set; } 
       [JsonProperty("email")] public string Email { get; set; }
}

用法也非常简单，并且您的代码中已经包含了大部分内容:

And the usage is pretty straightforward too, and you already have most of it in your code:

var data = JsonConvert.DeserializeObject<JsonData>(json);

foreach(var mailInfo  in data.EmailList){
       Console.WriteLine($"{mailInfo.Name} <{mailInfo.Email}>;");
}

//here a list of string 
var emails = data.EmailList.Select(x=> x.Email).ToList();

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