How to pass a list of objects to a [HTTPPost]controller parameter, in ASP.Net MVC?

Question

i have the next view:

@model IEnumerable<L5ERP.Model.BLL.BusinessObjects.MTR_MonthlyTransfer>
@using (Html.BeginForm("ExpenseMonthlyTransferProcessing", "BudgetTransfer", Model.ToList())){
<table class ="divTable">
<tr>
    <th>Transferir</th>

    <th>
       Clave
    </th>

    <th>
        Monto
    </th>

</tr> 
@foreach (var item in Model) {
<tr>
    <td>
        @Html.CheckBoxFor(x => item.MTR_Bool, new { @class = "checkMTR", @checked = "checked" })

    </td>
    <td>
         @Html.TextBoxFor(x => item.MTR_Key, new {@class = "longInput" })
    </td>
    <td>
        @String.Format("{0:F}", item.MTR_Amount)
    </td>
</tr>   
 } 
</table> 
}

and my controller like this

[HttpPost]
    public ActionResult ExpenseMonthlyTransferProcessing(List<MTR_MonthlyTransfer> lstMtr)
    { return View(lstMTR); }

But when i do the post my list is null, how can i send my list through the submit button ?

Answer 1

You should change the @model to an array (L5ERP.Model.BLL.BusinessObjects.MTR_MonthlyTransfer[]) or something else that implements IList<>:

@model L5ERP.Model.BLL.BusinessObjects.MTR_MonthlyTransfer[]

@for (var i = 0; i < Model.Length; i ++) {
<tr>
    <td>
        @Html.CheckBoxFor(x => Model[i].MTR_Bool, new { @class = "checkMTR", @checked = "checked" })
    </td>
    <td>
        @Html.TextBoxFor(x => Model[i].MTR_Key, new {@class = "longInput" })
    </td>
    <td>
        @String.Format("{0:F}", item.MTR_Amount)
    </td>
</tr> 

Answer 2

receive a FormCollection and parse the items in it manually

Use F12 to check the post in your navigator to see if it are sending the content you expected.