使用后如何保持单选按钮为选中状态？

Question

I have on my webpage 6 radiobuttons. And when you click on one of the buttons, the overview will shown. But the chosen radio button isn't checked. You see that the button is shown as checked for a while. But than as the other ones it will be unchecked again.

How can I keep it checked?

The view:

    <asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server" >
        <% using (Html.BeginForm("Overige_Statistieken", "Hitdossier", 

        FormMethod.Post, new { id = "frmStatistieken" })) %>
            <% { %>
                <table>
                    <tr>
                        <th class="hitlijst_editie">Selecteer overzicht:</th>
                    </tr>
                    <tr>
                        <td>
                        <%= Html.RadioButton("Overzicht", "1", new
                            {
                                @onclick = "document.getElementById('frmStatistieken').submit();"
                            }) %> Overzicht Alle Nummer 1 hits per week
                        </td>
                    </tr>
                    <tr>
                        <td>
                        <%= Html.RadioButton("Overzicht", "2", new
                            {
                                @onclick = "document.getElementById('frmStatistieken').submit();"
                            })%> Overzicht Alle Tips van de week
                        </td>
                    </tr>
...
        </table>
        <br />
        <br />
        <div>
             <%= Html.Action("Overige_StatistiekenLijst", new { AID_Overzicht = ViewBag.ID_Overzicht })%> <br />   
        </div>
    <% } %>
</asp:Content>

... and this is the controller:

public ActionResult Overige_Statistieken(string AID_Overzicht = "1")
{
    ViewBag.ID_Overzicht = AID_Overzicht;
    return View();
}

[HttpPost]
public ActionResult Overige_Statistieken(FormCollection ACollection)
{
    string sID_Overzicht = ACollection["Overzicht"].ToString();
    return Overige_Statistieken(sID_Overzicht);
}

public ActionResult Overige_StatistiekenLijst(string AID_Overzicht)
{
    ViewBag.ID_Overzicht = AID_Overzicht;

    ReadOverigeStatistieken(AID_Overzicht);
    return View(_ListOverzichtModel);
}

Answer 1

There's an overload method that will allow you to set the initial state of the radio button, using the isChecked parameter (third argument).

<%= Html.RadioButton("Overzicht", "1",  (int)ViewBag.ID_Overzicht==1,  new
      {
          @onclick = "document.getElementById('frmStatistieken').submit();"
      }) %>

The following was added to your code. Do that same thing to all your radio buttons paying attention to the value (ie 1) you will check against.

ViewBag.ID_Overzicht==1