show records on same details page by clicking next button in asp.net mvc getting error

Question

I want to display the records on details page when user click on next button then he should be able to display the next record of table. Suppose user select the details of a particular record id 1 he get the details of that id 1 at the same time on the same page by clicking the next button user should be able to get the record of id 2 and vice versa. I have done it but getting some error when table has no such id named id 3 after id 1 and id 2 its showing me the error. Please help me to find out where i am wrong.

View

@model WebApp.ViewModels.ViewTeamList
<script type="text/javascript">
   var dataid = '@Html.Raw(Json.Encode(Model.TeamDetails.TeamId))';
for( var item in dataid)
    console.log(dataid[item]);}();
</script>
<script type="text/javascript">
  $("#btnNext").click(function () {
    var $buttonClicked = $(this);
    var nid = $buttonClicked.attr('data-id');
    console.log(nid);
    $.ajax({
      url: 'Team/Next',
      data: { dataid: nid },
      //data: JSON.stringify(data.TeamId),
      success: function (response) {
       divDetail.html(data);
      }
    });
  });
</script>

<div class="row">
  <div class="col-md-11 col-sm-11 pull-left" style=" font-size:large; font-weight:600">
    @Model.TeamDetails.TeamName
  </div>
  @* <div class="col-md-1 col-sm-1 pull-right">*@
  <div class="navi-but">
    <a href="#" id="btnPrevious" data-id="@Model.TeamDetails.TeamId" class="details">
      <span class="previous">Previous</span>
    </a>
    <a href="#" class="details" data-id="@Model.TeamDetails.TeamId" id="btnNext">
      <span style="padding-right:7px">Next</span><span class="next"></span>
    </a>
    <li class="dropdown">
      <a href="#" class="dropdown-toggle" data-toggle="dropdown">
        <img src="~/Images/settings.png" />
      </a>
      <ul class="dropdown-menu" role="menu">
        <li><a href="@Url.Action("Edit", "Team", new { id = Model.TeamDetails.TeamId })">Edit</a></li>
      </ul>
    </li>
  </div>
  @* </div>*@
</div>             
<div class="row">
  <div class="col-md-4 col-sm-4"> 
    @Html.CustomLabel("lblTeam","CT Team Name:")
  </div>
  <div class="col-md-8 col-sm-8">
    @Model.TeamDetails.TeamName
  </div>
</div>
<div class="row">
  <div class="col-md-4 col-sm-4"> 
    @Html.CustomLabel("lblDescription","Description:")
  </div>
  <div class="col-md-8 col-sm-8">
    @Model.TeamDetails.Description
  </div>
</div>
<div class="row">
  <div class="col-md-4 col-sm-4"> 
    @Html.CustomLabel("lblCTUserCount","User Count")
  </div>                         
  <div class="col-md-8 col-sm-8 pull-left">
    @Model.TeamDetails.UserCount
  </div>                  
</div>

Controller

public ActionResult Next(int dataid)
{
  dataid++;          
  ViewTeamList viewTeamList = new ViewTeamList();
  viewTeamList.ViewTeamDetails(dataid);
  return PartialView("_ViewTeamDetails", viewTeamList);
}

View model

public class ViewTeamList
{
  public TeamDetails TeamDetails;
  private ITeamService teamService;
  public ViewTeamList()
  {
  }
  public void ViewTeamDetails(int Id)
  {
    teamService = new TeamService(pDbContext);
    TeamDetails = teamService.GetTeamDetails(Id);
    //return (TeamDetails.First());
  }

}

Please help where i am doing wrong.

Answer 1

• To Display from WebMethod You Should follow these steps: create

  [webmethod]

to retrieve all the data

• List items then make a javascript method in client side use:

  ajax({ type:'post', url:'exaple.aspx/showMethod', data:{}, datatype:'json', contentType:'application/json; charset=utf-8', scuccess:function(data) --display from here in table or any other data ), error:function(){ alert('Error'); } })

---

Answer 2

I didn't look your code in detail but it seems to me that you have a logical problem. Since you are always incrementing id by one ( dataid++; ) that won't work if some record is deleted in the meantime. For example let's say that you have Record1 with id 1, Record2 with id 2 and Record 3 with id 3 and you delete Record2. Now when you are trying to get next record after Record1 you are incrementing id by 1 so you have 2 and there is no record with id 2 in the db anymore. Instead of dataid++; you should find next id that really exists in db. As I said I didn't read code in detail so there may be more possible problems.