Html.CheckBox Helper passes null to the calling controller - c#

Is there a reason why my Html.CheckBox() View control is returning null up to the Controller ?
Can't seem to figure this one out and would appreciate any help !
View:
#{ Html.BeginForm("ActionName", "ControllerName", FormMethod.Get); }
Enter Text: #Html.TextBox("Code", string.Empty, new { id = "Code" })
<input type="submit" value="GO" />
<span style="padding-left:20px; font-size:14px" >#Html.CheckBox("exactMatch", false, new { id = "textmatches" })
&nbspText exact match</span>
#{ Html.EndForm(); }
Controller that gets called upon submitting the form:
public ActionResult ActionName(string code,bool boxChecked)
{
return View(ServiceCallGoesHere(code.Trim(),boxChecked));
}
I can't figure out why in the world is my checkbox status not being passed to the controller. Why is boxChecked parameter in the controller always = null ? How can I resolve this problem ?
Thank you in advance !

As far as I know when the view post back the data MVC framework uses the id of form controls to map them with the parameters of an action of your controller.Maybe that's why you can't get the right data

change
public ActionResult ActionName(string code,bool boxChecked)
{
return View(ServiceCallGoesHere(code.Trim(),boxChecked));
}
to
> public ActionResult ActionName(string code,bool exactMatch)
{
return View(ServiceCallGoesHere(code.Trim(),exactMatch));
}

Related

Having a problem redirecting a form post to another view

I have a basic MVC form that allows a user to submit a zip code and after clicking submit, the user should be redirected to a new view. My code seems to redirect to the next action successfully. However after the redirect, the controller returns back to the original action, so to the user, the page next changed at all.
Here's my View code:
#using (Html.BeginForm("PricingQuote", "Home", FormMethod.Post, new { #class = "rd-mailform text-center offset-top-30" }))
{
<div class="form-group">
<label class="form-label" for="contact-zip">Zip Code</label>
<input class="form-control" id="contact-zip" type="text" name="zip" data-constraints="##Required">
</div>
<button class="btn btn-primary offset-top-30" type="submit">GET STARTED</button>
}
Here's the PricingQuote action in my HomeController. This action redirects to the Pricing action in my Pricing controller:
[HttpPost]
public ActionResult PricingQuote(string zipCode)
{
return RedirectToAction("Pricing", "Pricing");
}
Here's my PricingController:
public class PricingController : Controller
{
// GET: Pricing
public ActionResult Pricing()
{
return View();
}
}
So, after clicking GET STARTED, it accesses my Home/PricingQuote action. This action then tries to redirect to the Pricing/Pricing action, which it does however, the code then seems to (incorrectly) return back to Home/PricingQuote and exits the action.
Any idea how I can redirect & display my Pricing view?
Thanks
Pass the controller in as the second parameter:
[HttpPost]
public ActionResult PricingQuote(string zipCode)
{
return RedirectToAction("Pricing", "PricingController");
}
Thanks for your responses. I was able to figure out my problem. The name of the action I was trying to redirect to ("Pricing") was the same name as my controller ("Pricing"). As a test, I renamed my action to "PricingA" & it worked, so apparently based on this, an action cannot be the same name as the controller when attempting a "RedirectToAction", which I was unaware of (at least that's my assumption based on the results I've found).
Unfortunately, I tried googling for some add'l evidence of this, to provide with this answer, but was unable to find any.
This works:
HomeController:
[HttpPost]
public ActionResult PricingQuote(string zipCode)
{
return RedirectToAction("PricingA", "Pricing");
}
Pricing Controller
[HttpGet]
public ActionResult PricingA()
{
return View();
}

Trying to return to same view and bind data there after posting data and binding value in asp.net mvc from same view

I am using FormMethod.post and for retrieving value on page and then post it.
index_shift.cshtml:
#using (Html.BeginForm("Index_shift", "Scm_Mod_Sug", FormMethod.Post))
{
<div>
#Html.DropDownList("shift_details", ViewBag.shift_details as SelectList, new { Class = "form-control selectpicker show-tick" })
</div>
}
In controller Scm_Mod_Sug
public ActionResult Index_shift()
{
ViewBag.shift_details = new SelectList(Getshift_details(), "ShiftVal", "ShiftVal");
return View();
}
After posting value to it want to return value to same view (index_shift.cshtml) and bind value on that page but I get an error
There is no ViewData item of type 'IEnumerable' that has the key 'shift_details'
Code:
[HttpPost]
public ActionResult Index_shift(FormCollection form)
{
shift_details = form["shift_details"];
ViewBag.Rval0 = values[0].Split('~');
return view()
}
Any idea how to achieve it would be appreciated.
Check this line:
ViewBag.shift_details =new SelectList(Getshift_details(), "ShiftVal", "ShiftVal");
You are writing value two twice. Change it to this:
ViewBag.shift_details =new SelectList(Getshift_details(), "ShiftId", "ShiftVal");
You must provide Id to the SelectList.

ASPNET MVC 5 Html helper Action method view results input id missing (sometimes..) Possible Bug?

To recreate the issue I'm having I've set up two simple controller actions, two views and a view model:
MultiForms Action (in the form controller class)
public class FormController : Controller
{
[HttpGet]
public ActionResult MultiForms()
{
return View("MultiForms");
}
// ...
MultiForms.cshtml - Razor View
#Html.Action("MyFormGet", "Form")
Notice in the action method I call the controller method that returns the form partial view.
MyFormGet Action
[HttpGet]
public PartialViewResult MyFormGet()
{
var viewModel = new MyFormViewModel();
ViewData.TemplateInfo.HtmlFieldPrefix = Guid.NewGuid().ToString().Replace("-", "_");
return PartialView("MyForm", viewModel);
}
View Model
public class MyFormViewModel
{
public string TextInput1 { get; set; }
}
MyForm.cshtml - Razor View
#model Mvc5App.Controllers.MyFormViewModel
#using (Html.BeginForm("MyFormPost", "Form", FormMethod.Post))
{
<br />
#Html.TextBoxFor(m => m.TextInput1)
}
When I point my browser at /Form/MultiForms I get the output I expect:
<input type="text" value="" name="e166fa0d_46fe_40d4_a970_73c52a35f224.TextInput1" id="e166fa0d_46fe_40d4_a970_73c52a35f224_TextInput1">
Then I refresh the page and the output becomes this:
<input type="text" value="" name="48edc339_69ad_4b9b_9583_198038beab45.TextInput1">
Where did the id attribute go? Is this a bug in ASPNET MVC5 or have I done something wrong with this setup?
Thanks to #demo I think I figured out when the id doesn't show up...
If the id starts with a digit(or underscore) it will not render. So this GUID will render:
f3b1a447_3786_4472_9dfe_14c3ae8aae24
But this one will not:
1c26ce3d_5c71_408a_aae2_7be414f1d383
The solution for the above seems to be prefixing with something like this:
FOO_1c26ce3d_5c71_408a_aae2_7be414f1d383
And the problems go away.

how to take input from TextBox and show in view in MVC

I want to show one TextBox. In that if give any input string and button clicked it should so like this
hai , what is ur name
[TextBox]
welcome,ur name is "xyz"
I am new in MVC. Please help me to do this.
View
#{
ViewBag.Title = "MyPage";
}
<h2>Mymethod</h2>
<h3>#ViewBag.Message</h3>
#Html.TextBox("Name")
<form method="post">
<input type="submit" value="Submit" name="btn" />
</form>
HomeController.cs
public ActionResult Mymethod()
{
ViewBag.Message = "Hello what is ur name ??? ";
return View();
}
There are many ways to do this to accomplish what you want. I will provide you with a simplistic approach, please modify and change it to fit in with your scenario.
I would normally recommend using a view model above any other way, for example using a single string value or using FormCollection or ViewBag. They can work but I prefer to use view models.
I answered a question on what view models are and what they are supposed to do, please read it:
What is ViewModel in MVC?
First you will create a view model that will handle your input data, like first name, last name, age, etc. You will then pass this view model through to the view. In your example I will only include name:
public class ViewModel
{
public string Name { get; set; }
}
In your Create action method you will instantiate this view model and pass it to the view. And when you click on the button to submit the form then the post action method will receive this view model as input parameter:
public ActionResult Create()
{
ViewModel model = new ViewModel();
return View(model);
}
[HttpPost]
public ActionResult Create(ViewModel model)
{
if (!ModelState.IsValid)
{
// If validation fails send the view model back to the view and fix any errors
return View(model);
}
// Do what you need to do here if there are no validation errors
// In your example we are posting back to the current view to
// display the welcome message
return View(model);
}
And then finally you view will look like this:
#model Project.Models.ViewModel
#using (Html.BeginForm())
{
#Html.TextBoxFor(m => m.Name)
<button type="submit">Submit</button>
if (!string.IsNullOrWhiteSpace(Model.Name))
{
<p>welcome, your name is #Model.Name</p>
}
}
Please spend some time reading through the many online tutorials on ASP.NET MVC.
Modify your current view to
#using(Html.BeginForm("ControllerName","Mymethod",FormMethod.Post))
{
<input type="submit" value="Submit" name="btn" />
}
Add another action method in your controller like this :
[HttpPost]
public ActionResult Mymethod(FormCollection form)
{
string Name = form["Name"];
Viewbag.Name = Name;
return View()
}
Then add view to this controller and write this into it.
Hi , Your Name is #Viewbag.Name
You should wrap your form in form tag. It is a form after all. So when you click submit, you are submitting the form.
<form method="post">
<h2>Mymethod</h2>
<h3>#ViewBag.Message</h3>
#Html.TextBox("Name")
#if (!String.IsNullOrEmpty(ViewBag.Name))
{
<h3>
welcome,ur name is #ViewBag.Name
</h3>
}
<input type="submit" value="Submit" name="btn" />
</form>
On the controller, you need to add HttpPost handler for your Mymethod action. This is where your web server is accepting the form you've submitted.
[HttpPost]
public ActionResult Mymethod(string name)
{
ViewBag.Message = "Hello what is ur name ???";
ViewBag.Name = name;
return View();
}

get a variable passed to my controller from a textbox

I have a simple model I am using for a search page to do some validation:
public class Search {
[Required]
[DisplayName("Tag Number")]
[RegularExpression("([1-9][0-9]*)", ErrorMessage = "Tag must be a number")]
public int HouseTag { get; set; }
i then have a simple view with a textbox and a submit button:
#model Search
#{
Layout = "~/_Layout.cshtml";
}
#using (Html.BeginForm("Search", "Inquiry", FormMethod.Get)){
#Html.LabelFor(m =>m.HouseTag)
#Html.TextBoxFor(m=>m.HouseTag, new { type = "Search", autofocus = "true", style = "width: 200px", #maxlength = "6" })
<input type="submit" value="Search" id="submit"/>
my controller is expecting a parameter of an id:
[HttpGet]
public ActionResult Search(int id){
ViewBag.Tag = id;
return View();
}
when i execute it with a number i get a null value being passed to the controller, causing things to blow up. I am using the model to control some of the properties of the search box for validation. I used to just have #Html.TextBox and it returned fine, but now that ive added the model, it doesnlt return anything.
You can set your parameter to a type of Search and then access the property in your action
[HttpGet]
public ActionResult Search(Search model){
ViewBag.Tag = model.HouseTag;
return View();
}
If it were me I'd make this a HttpPost or create a seperate action for this form so I wouldn't see the HouseTag text in the URL..
#using (Html.BeginForm("Search", "Inquiry", FormMethod.Post))
{
#Html.LabelFor(m => m.HouseTag)
#Html.TextBoxFor(m => m.HouseTag, new { type = "Search", autofocus = "true", style = "width: 200px", #maxlength = "6" })
<input type="submit" value="Search" id="submit" />
}
[HttpPost]
public ActionResult Search(Search model){
ViewBag.Tag = model.HouseTag;
return View();
}
You are expecting a parameter named id and you are passing HouseTag as the name of that parameter you should rename id to houseTag inside the Search method.
There's a couple of things going on here. First you are going to want to split your Get and Post actions. Also forms are only used in conjunction with POST's. You also don't need to name your action or controller unless you are sending the post to a different controller or action then the GET.
This is the get. It renders the form on the page. You don't need to put [HttpGet] on there, it is the default.
public ActionResult Search()
{
return View();
}
The following is going to post the form back to the server. the model binder will wire up the html form fields with your view model. since you have validators on the view model, you'll want to check that the model state is valid and re-show the view with the associated errors. You will need to add an #Html.ValidationMessageFor(...) into your view so that you actually see those errors.
[HttpPost]
public ActionResult Inquiry(Search search)
{
if (!ModelState.IsValid)
{
return View(search);
}
//so something with your posted model.
}

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