Error: The model item passed into the Dictionary is of type X but this Dictionary requires a model item of type Y

Question

Error starting query and generating list with results:

Error:

System.Invalidoperationexception: The model item passed into the Dictionary is of type 'System.Linq.Enumerable+Whereselectenumerableiterator`2[System.Linq.Igrouping`2[System.Int32,Blogweb.Models.Provisioning],<>f__AnonymousType1`3[System.Int32,System.Int32,System. Decimal]]', but this Dictionary requires a model item of type 'System.Collections.Generic.Ilist`1[Blogweb.Models.Sourcing]'.

Abastecimento Controller:

public ActionResult AbastecimentoResumo()
{
    //código irrelevante

    var resultado = consulta.GroupBy(c => c.NumCarro.NCarro)
                            .Select(gp => new
                                         {
                                             NumCarroId = gp.Key,
                                             LitroTotal = gp.Sum(c => c.Litro),
                                             TotalConsumido = gp.Sum(c => c.TotalGasto)
                                          });            

    // código irrelevante

    return View(resultado);        
}

My view:

@using PagedList.Mvc;
@model IList<BlogWeb.Models.Abastecimento>

@{ ViewBag.Title = "Relatório de Vendas";
    Layout = "~/Views/Shared/_Layout.cshtml"; }

<table id="customers">
    <tr>
        <th>N° Carro </th>
        <th>Quant. </th>
        <th>Valor Unitário </th>
    </tr>
    @{ 
        foreach (var a in Model)
        {
            <tr>
                <td> @a.NumCarro.NCarro </td>
                <td> @a.Litro</td>
                <td> @a.TotalGasto</td>
            </tr>
        }
    }
</table>

Modelling:

public class Abastecimento
{
    public virtual int Id { get; set;}
    [Required]
    public virtual int Litro { get; set; }
    public virtual DateTime? DtAbastecido { get; set; }
    public virtual decimal VlrUnit { get; set; }
    public virtual int Km { get; set; }
    public virtual decimal TotalGasto { get; set; }
    public virtual int Km_Andado { get; set; }
    public virtual Usuario Autor { get; set; }
    public virtual Compra NomeProduto { get; set; }
    public virtual Veiculo NumCarro { get; set; }
}

Answer 1

See, the mistake says the guys aren’t the same.

All you need to do now is get them to agree

Create a new class, I’ll call it ViewModel because I can’t identify the nomenclature pattern you’re using

public class ViewModel
{
    public int NumCarroId { get; set; }
    public int LitroTotal { get; set; }
    public decimal TotalConsumido { get; set; }
}

In the view, change the second line to

@model IList<SeuNamespaceAqui.ViewModel>

And inside the table, you will have to use the fields of ViewModel obviously

foreach (var a in Model)
{
    <tr>
        <td> @a.NumCarroId  </td>
        <td> @a.LitroTotal </td>
        <td> @a.TotalConsumido </td>
    </tr>
}

And in the method GroupBy, change Select(gp => new { }) for Select(gp => new ViewModel { })