I'm developing a school project using a html.beginform to when i click in a button i go to a diferent Action, but i need to pass the values that i have inside my @model.dados2 in the view to the action, how can i do that?

<form asp-action="ExportToexcel_Click" method="post">
    <input asp-for="Inicial" hidden/>
    <input asp-for="Final" hidden/>
    <input asp-for="AcessoVisita" hidden />
    <input asp-for="tempo" hidden/>
    <input asp-for="ApZona" hidden/>
    <select  hidden asp-for="ap"  multiple>
        @foreach(var i in Model.ap)
        {
            <option value=@i> @i </option>
        }
    </select>

    <div style="margin-bottom:2%;margin-top:2%;">
        <input type="submit" value="Consultar"  />
    </div>
               
</form>

I already pass some data to the new action, i passed a list of ints, but i don't know how to pass a list of object.

Inside that action i will create a file, and to do that i need to pass the model that i have in the view to the action ExportToexcel_Click

[HttpPost]
        public ActionResult ExportToexcel_Click(dadosPassar dp)
        {

            var ds = new dadosPassar();
            ds = dp;

            return RedirectToAction("Index",ds);

        }

And thats my model,

    public class dadosPassar
    {
        public List<Stored1>? dados2 { get; set; }
        public List<L_AccessPoint>? Aps { get; set; } = new List<L_AccessPoint>();
        public List<L_Zone>? Zones { get; set; } = new List<L_Zone>();
        public List<int>? ap { get; set; } 
        public DateTime Inicial { get; set; }
        public DateTime Final { get; set; }
        public string? AcessoVisita { get; set; }
        public string? tempo { get; set; }
        public string ApZona { get; set; }
    }

Thats my dados2 structure

    public class Stored1
    {
        public short ap_id { get; set; }
        public string ap_name { get; set; }
        public int numeroAcessos { get; set; }
        //public int month { get; set; }
        public int year { get; set; }
        public int MES { get; set; }
        public int DIA { get; set; }

    }

CodePudding user response：

"But I don't know how to pass a list of object"

You could follow below steps:

Controller Action For Loading View:

public IActionResult Index(string stored1s)
        {
            if (stored1s != null)
            {
                List<Stored1> model = JsonConvert.DeserializeObject<List<Stored1>>(stored1s);
            }

            var listDados = new List<Stored1>()
            {
                new Stored1(){ ap_id = 101,ap_name ="AP-101", year= 2021, DIA=101, MES=202},
                new Stored1(){ ap_id = 102,ap_name ="AP-102", year= 2022, DIA=102, MES=203},
                new Stored1(){ ap_id = 103,ap_name ="AP-103", year= 2023, DIA=103, MES=204},


            };
            var ds = new dadosPassar();
            ds.AcessoVisita = "Initial AcessoVisita";
            ds.tempo = "Initial Tempo";
            ds.ApZona = "Initial Ap Zona";
            ds.Final = DateTime.Now;
            ds.dados2 = listDados;
            return View(ds);
        }

Note: Here string stored1s will be assigned value when RedirectToAction will be called from ExportToexcel_Click method.

Alternative Index

   public IActionResult Index()
        {
            var stringList = TempData["dados2"].ToString();
            List<Stored1> datosList = JsonConvert.DeserializeObject<List<Stored1>>(stringList);

            var listDados = new List<Stored1>()
            {
                new Stored1(){ ap_id = 101,ap_name ="AP-101", year= 2021, DIA=101, MES=202},
                new Stored1(){ ap_id = 102,ap_name ="AP-102", year= 2022, DIA=102, MES=203},
                new Stored1(){ ap_id = 103,ap_name ="AP-103", year= 2023, DIA=103, MES=204},


            };
            var ds = new dadosPassar();
            ds.AcessoVisita = "Initial AcessoVisita";
            ds.tempo = "Initial Tempo";
            ds.ApZona = "Initial Ap Zona";
            ds.Final = DateTime.Now;
            ds.dados2 = listDados;
            return View(ds);
        }

View:

@model DotNetWebApp.Models.dadosPassar

@using (Html.BeginForm("ExportToexcel_Click", "L_AccessPoint", FormMethod.Post))
{
    <input asp-for="AcessoVisita" hidden  />
    <input asp-for="tempo" hidden  />
    <input asp-for="ApZona" hidden  />

    @for (int i = 0; i < Model.dados2.Count; i  )
    {
        
        <tr >
            <td>
                <label><strong>Id</strong></label>
                @Html.TextBoxFor(model => model.dados2[i].ap_id)
            </td>
            <td>
                <label><strong>Name</strong></label>
                @Html.TextBoxFor(model => model.dados2[i].ap_name)
            </td>
            <td>
                <label><strong>Year</strong></label>
                @Html.EditorFor(model => model.dados2[i].year)
            </td>

        </tr>
        <br />
    }
    <input type="submit" d="cmdAction" style="margin-top:10px"  value="Export To Excel" />
}

Note: You can hide your @Html.TextBoxFor if you don't want them to display. Up to you.

Controller When Submit:

        [HttpPost]
        public ActionResult ExportToexcel_Click(dadosPassar dp)
        {

            var ds = new dadosPassar();
            ds = dp;
            return RedirectToAction("Index",
    new
    {
        stored1s = JsonConvert.SerializeObject(dp.dados2)
    });

           

        }

If you prefer Alternative Index in that case use this ExportToexcel_Click

        [HttpPost]
        public ActionResult ExportToexcel_Click(dadosPassar dp)
        {

            var ds = new dadosPassar();
            ds = dp;
            TempData["dados2"] = JsonConvert.SerializeObject(dp.dados2);
            return RedirectToAction("Index");
    



        }

Output: