如何从MVC .NET中的控制器中编写TextArea [英] How to write in a TextArea from controller in MVC .NET

问题描述

我正在开发一个小应用程序作为练习来学习MVC和ASP.NET，并且以下代码存在问题:

I am developing a little application as exercise to learn MVC and ASP.NET, and I have a problem with the following code:

顺便说一句:对不起...我学习.NET但不学习ASP，仅学习Windows Forms，而没有涉及MVC(作为一种实用方法).

BTW: Sorry... I studied .NET but not ASP, just Windows Forms and nothing about MVC (as a practical way).

这是我的视图:

@using (Html.BeginForm("userById", "Home", FormMethod.Post))
{
   @Html.TextBoxFor(model => model.Id)
   @Html.ValidationMessageFor(model => model.Id)
   <button type="submit">Subscribe</button>
}

<h3>Value results</h3>
@Html.TextArea("results", new { rows = 40, columns = 80 })

我想用一个Json数据填充这个TextArea(可以是另一个元素)

And I want to fill this TextArea (can be another element) with a Json Data

我的控制器:

[HttpPost]
    public ActionResult userById()
    {
        string receivedData;

        HttpWebRequest req = (HttpWebRequest)WebRequest
            .Create("http://www.mocky.io/v2/5808862710000087232b75ac");

        req.ContentType = "application/json";
        var response = (HttpWebResponse)req.GetResponse();

        using (var sr = new StreamReader(response.GetResponseStream()))
        {
            receivedData = sr.ReadToEnd();
        }

        var data = JsonConvert.DeserializeObject<RootObject>(receivedData);

        List<User> userList = data.clients.ToList();

        foreach (var item in userList)
        {
            ViewData["results"] = item.Id;
        }

        return View("Index");
    }

我的想法是用存储在名为userList的变量中的Json数据填充TextArea，但是foreach循环仅填充ONE元素.:(有人可以帮我吗?

My idea is populate the TextArea with the Json data that are stored into the variable called userList, but the foreach loop just fill ONE element. :( Can anybody help me?

提前谢谢！

推荐答案

最后，我用下面的代码解决了这个问题，如果有人对如何改进它感到很高兴.

Finally I solved the problem with the following code, I will pleasant if anybody have some idea about how can improve it.

控制器代码:

[HttpPost]
    public ActionResult userById()
    {
        string receivedData;

        HttpWebRequest req = (HttpWebRequest)WebRequest
            .Create("http://www.amisteriousurl.com");

        req.ContentType = "application/json";
        var response = (HttpWebResponse)req.GetResponse();

        using (var sr = new StreamReader(response.GetResponseStream()))
        {
            receivedData = sr.ReadToEnd();
        }

        var data = JsonConvert.DeserializeObject<RootObject>(receivedData);
        List<User> userList = data.clients.ToList();
        ViewData["results"] = getId(userList);

        return View("Index");
    }

private string getId(List<User> list)
    {
        StringBuilder sb = new StringBuilder();
        foreach (var item in list)
        {

            sb.Append(item.Id);
            sb.Append("\n");
        }

        return sb.ToString();
    }

查看:

@{
ViewBag.Title = "Home";
}

@model InsuranceWebAPI.Models.User

@using (Html.BeginForm("userById", "Home", FormMethod.Post))
{
   @Html.TextBoxFor(model => model.Id)
   @Html.ValidationMessageFor(model => model.Id)
   <button type="submit">Subscribe</button>
}

<h3>Value results</h3>
@Html.TextArea("results", new { rows = 40, columns = 80 })

型号:

using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;

namespace InsuranceWebAPI.Models
{
public class RootObject
{
    public IEnumerable<User> clients { get; set; }
}
public class User
{
    private string email;
    private string id;
    private string name;
    private string role;

    public User()
    {

    }

    public User(string email, string id, string name, string role)
    {
        this.Email = email;
        this.Id = id;
        this.Name = name;
        this.Role = role;
    }

    [Required]
    public string Email { get; set; }
    [Required]
    public string Id { get; set; }
    [Required]
    public string Name { get; set; }
    [Required]
    public string Role { get; set; }

}
}

谢谢大家！

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