How to Set RadioButtonFor in ASp net MVC 2 as Checked by default

Question

How can i Set RadioButtonFor   as Checked By Default   lt   Html RadioButtonFor m   gt  m Gender  Male    gt    there is way out for  Html RadioButton  but not for  Html RadioButtonFor   any Ideas

User · Answer

I found another option so you can just use @Html.EditorFor() with templates:

Say I have this enum:

public enum EmailType { Pdf, Html }

I can put this code in Views/Shared/EditorTemplates/EmailType.cshtml

@model EmailType
@{
    var htmlOptions = Model == EmailType.Html ? new { @checked = "checked" } : null;
    var pdfOptions = Model == EmailType.Pdf ? new { @checked = "checked" } : null;
}

@Html.RadioButtonFor(x => x, EmailType.Html, htmlOptions) @EmailType.Html.ToString()
@Html.RadioButtonFor(x => x, EmailType.Pdf, pdfOptions) @EmailType.Pdf.ToString()

Now I can simply use this if I want to use it at any time:

@Html.EditorFor(x => x.EmailType)

It's much more universal this way, and easier to change I feel.

User · Answer

It s not too pretty  but if you have to implement only very few radio buttons for the entire site  something like this might also be an option    lt   Html RadioButtonFor m   gt  m Gender  Male  Model Gender   Male    new    checked    checked      null   gt

User · Answer

I find it best to just put the default value in the constructor method of the model   Gender    Male

User · Answer

Use the simple way    lt    Html RadioButtonFor m   gt  m Gender   Male   new   Checked    checked      gt

User · Answer

You can also add labels that are tied to your radio buttons with the same ID  which then allows the user to click the radio button or label to select that item  I m using constants here for  Male    Female  and  Unknown   but obviously these could be strings in your model    lt    Html RadioButtonFor m   gt  m Gender   Male        new Dictionary lt string  object gt       checked    checked        id    Male         gt   lt    Html Label  Male     gt    lt    Html RadioButtonFor m   gt  m Gender   Female        new Dictionary lt string  object gt       id    Female         gt   lt    Html Label  Female    gt    lt    Html RadioButtonFor m   gt  m Gender   Unknown       new Dictionary lt string  object gt       id    Unknown         gt   lt    Html Label  Unknown    gt

User · Answer

This Helper evaluates the expression and if equals to the value it checks the radio button  and has the same parameters than RadioButtonFor  for this reason the name is diferent    public static MvcHtmlString CheckedRadioButtonFor lt TModel  TProperty gt  this HtmlHelper lt TModel gt  htmlHelper  Expression lt Func lt TModel  TProperty gt  gt  expression  object value        return CheckedRadioButtonFor htmlHelper  expression  value  null      public static MvcHtmlString CheckedRadioButtonFor lt TModel  TProperty gt  this HtmlHelper lt TModel gt  htmlHelper  Expression lt Func lt TModel  TProperty gt  gt  expression  object value  object htmlAttributes        var func   expression Compile        var attributes   new RouteValueDictionary htmlAttributes       if   object func htmlHelper ViewData Model     value            attributes  checked      checked             return htmlHelper RadioButtonFor expression  value  attributes       Usage    lt    Html CheckedRadioButtonFor m   gt  m Gender   Male   new   id    gender-male      gt    Result    lt  -- For Model Gender    Male  -- gt   lt input checked  checked  id  gender-male  name  Gender  type  radio  value  Male  gt   lt  -- For Model Gender    Female  -- gt   lt input id  gender-male  name  Gender  type  radio  value  Male  gt

User · Answer

Came across this and thought I would point out that for MVC 5 all you need to do is set the value on the model  For Example   Model       public class ExampleModel               public PackingListInputModel                           RadioButtonField    One                      public string RadioButtonField   get  set            View      model ExampleModel   using  Html BeginForm         Html RadioButtonFor m   gt  m RadioButtonField    One        Html RadioButtonFor m   gt  m RadioButtonField    Two       The state of the first radio button   One   will be set as active because the value matches what was set in the model

User · Answer

Here is code to set default radio button set to true   Html RadioButtonFor m   gt  m Gender   Male   new    checked    checked   id    rdGender   name    rbGender

User · Answer

Html RadioButton  Insured GenderType   1   Model Insured GenderType    1                Web Mvc Claims Resources PartyResource MaleLabel             Html RadioButton  Insured GenderType   2  Model Insured GenderType    2              Web Mvc Claims Resources PartyResource FemaleLabel

User · Answer

This question on StackOverflow deals with RadioButtonListFor and the answer addresses your question too  You can set the selected property in the RadioButtonListViewModel

User · Answer

If you re using jquery  you can call this right before your radio buttons      input radio first   attr  checked   true       This will check the first radio box  but you can look at more jquery to cycle through to the one you want selected

User · Answer

I assume you should have a group of radio buttons  something could be like   lt   Html RadioButtonFor m   gt  m Gender  Male    gt   lt   Html RadioButtonFor m   gt  m Gender  Female    gt   lt   Html RadioButtonFor m   gt  m Gender  Unknown    gt    You may give the default value for m Gender    Unknown   or something  from your controller

User · Answer

lt    Html RadioButtonFor m   gt  m Gender   Male   new    checked   true      gt    or    checked   checked   if you like

User · Answer

You need to add  checked  htmlAttribute in RadioButtonFor  if the radiobutton s value matches with Model Gender value              foreach  var item in Model GenderList                         lt div class  btn-group  role  group  gt                  lt label class  btn btn-default  gt                      Html RadioButtonFor m   gt  m Gender  item Key   int Model Gender  item Key   new    checked    checked      null                      item Value                lt  label gt               lt  div gt                    For complete code see below link  To render bootstrap radio button group with default checked  stackoverflow answer link

[asp.net-mvc-2] How to Set RadioButtonFor() in ASp.net MVC 2 as Checked by default

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