MVC 5，在Index页面中按组显示数据

Question

我是MVC5的新人。
我有两张桌子，tblClient＆amp; tblBranch。
数据结构是：

tblClient

ID | Name
---------
1  | BCS
2  | LBBI
3  | CARB

tblBranch

ID | cID | BranchName
---------------------
1  | 1   | Savar
2  | 1   | Nobinogor
3  | 2   | Sawrapara
4  | 1   | Mirpur
5  | 3   | Motijheel
6  | 2   | Dhanmondi
7  | 1   | Kazipara

现在我需要在索引页面中显示数据：

BCS

sL | Branch
-----------
1  | Savar
2  | Nobinogor
3  | Mirpur
4  | Kazipara

LBBI

sL | Branch
-----------
1  | Sawrapara
2  | Dhanmondi

CARB

sL | Branch
-----------
1  | Motijheel

我该怎么做？

Answer 1

您可以将每个tblClient包装在新的Object中：

tblClient has name and contains List of tblBranch

public Class Client
{
public string clientName {get;set;}
public List<Branch> branches {get;set;}
}

public Class Branch
{
public string branchName
}

并检索List<Client>并将其显示给用户界面

Answer 2

为索引视图编写模型类。

public class MyModel
{
    public string GroupName;
    public List<string> GroupItems;
}

为您的视图指定模型：

@model IEnumurable<MyProject.MyModel>
@foreach (var item in Model)
{
    <h2>@item.GroupName</h2>
    <ol>
    @foreach (var it in item.GroupItems)
    {
       <li>@it</li>
    }
    </ol>
}

最后在控制器的索引操作中填充模型并将其传递给视图：

public ActionResult Index()
{
    var model = new List<MyModel>();
    var item = new MyModel();
    item.GroupName = "Hello World";
    item.GroupItems = new List<string>() { "item1", "item2" };
    model.Add(item);
    return View(model);
}

Answer 3

没有必要做一些不寻常的事情。特别是，通过灌浆 您可以简单地遍历项目并输出它。

在ASP.NET Razor中：

Dictionary<int, string> clients = // get dictionary from DB like {{1, "BCS"}, {2, "LBBI"} ...}};
List<BranchEntity> branches = // get list of Branch entities just like in DB;
// You can pass these values as ViewBag or together as a Model

@{
    foreach (var client in clients)
    {
        var branchesForClients = branches.Where(x => x.cID == client.Key).ToArray();

        <h3>@client.Value</h3>
        <table>
        for (int i = 0; i < branchesForClients.Length; i++)
        {
            <tr>
                <td>@(i + 1)</td>
                <td>@branchesForClients[i].BranchName</td>
            </tr>
        }    
        </table>
    }
}

这是一个实体：

public class BranchEntity
{
    public int Id { get; set; }
    public int cId { get; set; }
    public string BranchName { get; set; }
}