我如何对无序列表进行分组？

Question

How can i group unorderd List? I have the following for-each to display RP informations but it creates a duplicate with the same Name, How can i group the li items by Name?

<ul id="treeview">
     @foreach (var item in Info)
        {
          <li data-expanded="true">@item.PaName
                <ul>
                     <li data-expanded="true">@item.sName</li>
                 </ul>
           </li>
         }
  </ul>   

I want to see something like this

----AOC
     ---DBSR
     ---KOLC

Answer 1

Just group data by PartyName, then you got data with key is PartyName and value is list of objects have the same PartyName. Use it to display in view instead.

Answer 2

You're on the right track talking about LINQ. In a basic form your code could look like this:

using System.Linq

groupedData = data.GroupBy(x => x.PartyName)

The output will be in this structure

"AOC" : [
    {
        "SubPartyName": "DBSR",
        "OtherData": "...."
    },
    {
        "SubPartyName": "KOLC",
        "OtherData": "...."
    },
]

You could then loop through the grouped data in your view.

Let me know if you need more clarification

Answer 3

I have the following for-each to display RP informations but it creates a duplicate with the same PartyName, How can i group the li items by PartyName?

You can try following code snippet:

@model IEnumerable<Party>
@{
    ViewData["Title"] = "RParty";
    var rpInfo = Model.GroupBy(p=>p.PartyName);
}

<h1>RP Information</h1>

<ul id="treeview">
    @foreach (var item in rpInfo)
    {
        <li data-expanded="true">
            <i class="fa fa-check-circle"></i>@item.Key

            @foreach (var party in @item)
            {
                <ul>
                    <li data-expanded="true">
                        <i class="fas fa-check-circle"></i> @party.SubPartyName
                    </li>
                </ul>
            }

        </li>
    }
</ul>