Access Messages from Message Center

Hi I’m try to display the top 5 messages from the message center on the homepage. But I’m not sure what I’m doing wrong. I try to get the messages from the message view model here is my code.

View model

@model Portal.ViewModel.MemberMessageViewModel

@foreach (var msg in Model.MessageList)

<div> @html.DisplayFor(modelItem => msg.CreatedOn) @html.DisplayFor(modelItem => msg.Subject) </div>

MessageViewModel.cs

public class MemberMessageViewModel : BaseViewModel { public string Subject { get; set; } public string CreatedOn { get; set}

   public List<MemberMessageViewModel> MessageList { get; set;}
}

Controller

public async Task<IActionResult> 

Homepage()
{
  string MESSAGE_PANEL_NAME = _configuration.GetSection(“TemplateStrings”).GetSection(“TEMPLATE_MESSAGECENTER”).Value;

try{
 memberHomepageVM.messageDetail = await _messageService.GetHomepageMessages(MESSAGE_PANEL_NAME, Lang);
}

Cshtml

@awaitHtml.PartialAsync(“_message”, Model.messageDetail)

Contents hide

Answers:

Method 1

Answers:

Thank you for visiting the Q&A section on Magenaut. Please note that all the answers may not help you solve the issue immediately. So please treat them as advisements. If you found the post helpful (or not), leave a comment & I’ll get back to you as soon as possible.

Method 1

To display top 5 records, we should use the “OrderByDescending()” to sort the message, and then use the “Take(5)” method to get the top 5 messages.

Please refer the following sample code:

Based on your MemberMessageViewModel create a service, and set initial data:

   public class MessageService : IMessageService
     {   
        public List<MemberMessageViewModel> GetHomepageMessages()
         {
             List<MemberMessageViewModel> messagelist = new List<MemberMessageViewModel>()
             {
                 new MemberMessageViewModel(){ Subject="S1", CreatedOn=DateTime.Now.ToString()},
                 new MemberMessageViewModel(){ Subject="S2", CreatedOn=DateTime.Now.AddDays(-6).ToString()},
                 new MemberMessageViewModel(){ Subject="S3", CreatedOn=DateTime.Now.AddDays(-4).ToString()},
                 new MemberMessageViewModel(){ Subject="S4", CreatedOn=DateTime.Now.AddDays(-5).ToString()},
                 new MemberMessageViewModel(){ Subject="S5", CreatedOn=DateTime.Now.AddDays(2).ToString()},
                 new MemberMessageViewModel(){ Subject="S6", CreatedOn=DateTime.Now.AddDays(-8).ToString()},
                 new MemberMessageViewModel(){ Subject="S7", CreatedOn=DateTime.Now.AddDays(1).ToString()},
             };

             return messagelist;
         }
     }

Register the service in the Startup.ConfigureServices method:
```
   services.AddScoped<IMessageService, MessageService>();
```

Homepage controller:

 public async Task<IActionResult> Homepage()
 {
     //get the message list
     var messages = _messageService.GetHomepageMessages()
         .OrderByDescending(c => Convert.ToDateTime(c.CreatedOn))   //sort the message based on the CreatedOn property.
         .Take(5)  //take the top 5 messages.
         .ToList();

     //according to your view page bind model, it seems that you want to return a MemberMessageViewModel.
     MemberMessageViewModel member = new MemberMessageViewModel()
     {
         CreatedOn = DateTime.Now.ToString(),
         Subject = "Subject A",
         MessageList = messages,
     };
     //
     return View(member);
 }

Homepage view page(Homepage.cshtml):

     @model Test.Models.MemberMessageViewModel

     @foreach (var msg in Model.MessageList)
     { 
         <div>
             @Html.DisplayFor(modelItem => msg.CreatedOn)
             @Html.DisplayFor(modelItem => msg.Subject)
         </div><br/>
     }

The output as below:

Besides, you could also sort and take the messages from the View page:

        @model Test.Models.MemberMessageViewModel

        @foreach (var msg in Model.MessageList.OrderByDescending(c => Convert.ToDateTime(c.CreatedOn)).Take(5))
        { 
            <div>
                @Html.DisplayFor(modelItem => msg.CreatedOn)
                @Html.DisplayFor(modelItem => msg.Subject)
            </div><br/>
        }

If I misunderstand your problem, please let me know freely.

All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0

0 0 votes

Article Rating