Asp.net-mvc – ASP.NET MVC disable radio buttons with Razor syntax

asp.net-mvcrazor

In an ASP.NET MVC application, I have two radio buttons. Depending on a boolean value in the model, How do I enable or disable the radio buttons? (The values of the radio buttons are also part of the model)

My radio buttons currently look like this –

            @Html.RadioButtonFor(m => m.WantIt, "false")  
            @Html.RadioButtonFor(m => m.WantIt, "true")

In the model, I have a property called model.Alive. If model.Alive is true I want to enable the radio buttons, else if model.Alive is false, I want to disable the radio buttons.
Thanks!

Best Answer

You could pass the values directly as htmlAttributes like so:

@Html.RadioButtonFor(m => m.WantIt, "false", new {disabled = "disabled"})  
@Html.RadioButtonFor(m => m.WantIt, "true", new {disabled = "disabled"})

If you need to check for model.Alive then you could do something like this:

@{
   var htmlAttributes = new Dictionary<string, object>();
   if (Model.Alive)
   {
      htmlAttributes.Add("disabled", "disabled");
   }
}

Test 1 @Html.RadioButton("Name", "value", false, htmlAttributes)
Test 2 @Html.RadioButton("Name", "value2", false, htmlAttributes)

Hope that helps

Related Solutions

C# – How to handle multiple submit buttons in ASP.NET MVC Framework

Here is a mostly clean attribute-based solution to the multiple submit button issue based heavily on the post and comments from Maarten Balliauw.

[AttributeUsage(AttributeTargets.Method, AllowMultiple = false, Inherited = true)]
public class MultipleButtonAttribute : ActionNameSelectorAttribute
{
    public string Name { get; set; }
    public string Argument { get; set; }

    public override bool IsValidName(ControllerContext controllerContext, string actionName, MethodInfo methodInfo)
    {
        var isValidName = false;
        var keyValue = string.Format("{0}:{1}", Name, Argument);
        var value = controllerContext.Controller.ValueProvider.GetValue(keyValue);

        if (value != null)
        {
            controllerContext.Controller.ControllerContext.RouteData.Values[Name] = Argument;
            isValidName = true;
        }

        return isValidName;
    }
}

razor:

<form action="" method="post">
 <input type="submit" value="Save" name="action:Save" />
 <input type="submit" value="Cancel" name="action:Cancel" />
</form>

and controller:

[HttpPost]
[MultipleButton(Name = "action", Argument = "Save")]
public ActionResult Save(MessageModel mm) { ... }

[HttpPost]
[MultipleButton(Name = "action", Argument = "Cancel")]
public ActionResult Cancel(MessageModel mm) { ... }

Update: Razor pages looks to provide the same functionality out of the box. For new development, it may be preferable.

Asp.net-mvc – How to render an ASP.NET MVC view as a string

Here's what I came up with, and it's working for me. I added the following method(s) to my controller base class. (You can always make these static methods somewhere else that accept a controller as a parameter I suppose)

MVC2 .ascx style

protected string RenderViewToString<T>(string viewPath, T model) {
  ViewData.Model = model;
  using (var writer = new StringWriter()) {
    var view = new WebFormView(ControllerContext, viewPath);
    var vdd = new ViewDataDictionary<T>(model);
    var viewCxt = new ViewContext(ControllerContext, view, vdd,
                                new TempDataDictionary(), writer);
    viewCxt.View.Render(viewCxt, writer);
    return writer.ToString();
  }
}

Razor .cshtml style

public string RenderRazorViewToString(string viewName, object model)
{
  ViewData.Model = model;
  using (var sw = new StringWriter())
  {
    var viewResult = ViewEngines.Engines.FindPartialView(ControllerContext,
                                                             viewName);
    var viewContext = new ViewContext(ControllerContext, viewResult.View,
                                 ViewData, TempData, sw);
    viewResult.View.Render(viewContext, sw);
    viewResult.ViewEngine.ReleaseView(ControllerContext, viewResult.View);
    return sw.GetStringBuilder().ToString();
  }
}

Edit: added Razor code.

Best Answer

Related Solutions

C# – How to handle multiple submit buttons in ASP.NET MVC Framework

Asp.net-mvc – How to render an ASP.NET MVC view as a string

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