how do radio buttons work with asp.net mvc binding

i have an strongly typed object that represents all of the textbox properties of a form and it works fine开发者_如何学JAVA when i post to the controller.

i now need to add a radio button to this form. how does that map to the strongly typed objects?

If you use the HtmlHelper.RadioButton you will be fine as long as the name matches your property name.

Below is a snippet of code from one of my projects:

<span><%= Html.RadioButton("DateFormat", "MMMM/dd/yy", Model.DateFormat.Equals("MMMM/dd/yy"), new Dictionary<string, object> { { "class", "normalwidth" } })%><label class="displayinline"><%=DateTime.Now.ToString("MMMM dd, yyyy")%></label></span>
<span><%= Html.RadioButton("DateFormat", "yyyy/MM/dd", Model.DateFormat.Equals("yyyy/MM/dd"), new Dictionary<string, object> { { "class", "normalwidth" } })%><label class="displayinline"><%=DateTime.Now.ToString("yyyy/MM/dd")%></label></span>
<span><%= Html.RadioButton("DateFormat", "dd/MM/yyyy", Model.DateFormat.Equals("dd/MM/yyyy"), new Dictionary<string, object> { { "class", "normalwidth" } })%><label class="displayinline"><%=DateTime.Now.ToString("dd/MM/yyyy")%></label></span>
<span><%= Html.RadioButton("DateFormat", "", new Dictionary<string, object> { { "class", "normalwidth" } })%><label class="displayinline">custom <%= Html.TextBox("customdate", "", new Dictionary<string, object> { { "style", "width:50px; font-size:12px; display:inline;" } }) %> </label></span>

And here is the rendered HTML. Notice each input has the same name, but different values. Only the selected button will have it's value posted back to the server.

    <p><label>Date Format</label> 
        <span><input class="normalwidth" id="DateFormat" name="DateFormat" type="radio" value="MMMM/dd/yy" /><label class="displayinline">October 18, 2009</label></span> 
        <span><input checked="checked" class="normalwidth" id="DateFormat" name="DateFormat" type="radio" value="yyyy/MM/dd" /><label class="displayinline">2009/10/18</label></span> 
        <span><input class="normalwidth" id="DateFormat" name="DateFormat" type="radio" value="dd/MM/yyyy" /><label class="displayinline">18/10/2009</label></span> 
        <span><input class="normalwidth" id="DateFormat" name="DateFormat" type="radio" value="" /><label class="displayinline">custom <input id="customdate" name="customdate" style="width:50px; font-size:12px; display:inline;" type="text" value="" /> </label></span> 
    </p> 

And in your class:

public class Post
{
   public string DateFormat {get; set:}
}

 @Html.RadioButtonFor(m => m.DateFormat, "MMMM/dd/yy")
 @Html.RadioButtonFor(m => m.DateFormat, "yyyy/MM/dd")