I have two actions to create a Tag, an HttpGet and an HttpPost:
[HttpGet]
public virtual ActionResult New(String culture) {
culture = culture ?? "en-US";
TagNewModel model = new TagNewModel();
ViewBag.Data = new { Culture = culture };
return View(model);
}
[HttpPost, ValidateAntiForgeryToken, ValidateInput(false)]
public virtual ActionResult Create(MarkNewModel model, String culture) {
}
When I submit the form the "culture" in the HttpPost is null ... How can I preserve the culture value I set on the HttpGet?
Thank You,
Miguel
You simply need to include the Culture value into the form with the name that matches the action parameter name. In your case "culture".
In the following example, I am not using any of the Html helpers. I'm just showing one way of doing it.
<form action="create" method="post">
<input type="hidden" value="#(ViewBag.Data.Culture)" name="culture"
</form>
Related
Controller:
public ActionResult MyController()
{
ViewBag.DateNow = DateTime.Now.ToString("yyyy-MM-dd");
}
[HTTPPost]
public ActionResult MyController(string fromDate)
{
ViewBag.DateNow = fromDate;
}
View:
#using (Html.BeginForm("MyController", "Account", FormMethod.Post))
{
//datepicker class: bootstrap-datepicker.js
<input id="fromDate" type="text" class="datepicker" />
<buttontype="submit" value="Search" class="btn btn btn-primary">
Search
</button>
}
What I'm trying to achieve is before POST the data that pass into ViewBag.DateNow is the current date and it successfully bring in to the view. However when I'm trying to fill up the input form with (eg: 2016-05-10) and click on the Search button. But seems like the fromDate string return NullReferenceException. I'm trying out with some solution online but I still can't get it right and that's why I decided to get this posted up. Thanks in advance!
For this to work properly you need to specify the name attribute in your textbox. It needs to be the same value as the input variable in your HTTP post action method, namely fromDate. Currently the id attribute is set to fromDate:
<input id="fromDate" name="fromDate" type="text" value="#ViewBag.DateNow" />
If you do not specify this name attribute then when you post your form fromDate will always be null. Specifying it like above will make sure that fromDate will always have a value (if entered).
I want to go a bit off-topic here, I would like to suggest that you make use of view models for your form submissions. Instead of having individual input variables in your action method you can just have your view model as input parameter.
I wrote an answer as to what view models are here, please go and read it if you have the time:
What is ViewModel in MVC?
Working on your example, I would have a view model that contains just one property, namely FromDate. FromDate will contain the value in your textbox. It is setup as a string because you want to pass it a formatted date value:
public class TestModel
{
public string FromDate { get; set; }
}
This value will be set in your HTTP get action method and the view model will be sent to the view:
public ActionResult Index()
{
TestModel model = new TestModel();
model.FromDate = DateTime.Now.ToString("yyyy-MM-dd");
return View(model);
}
In your view you will accept this view model and create the form accordingly:
#model WebApplication_Test.Models.TestModel
#using (Html.BeginForm())
{
#Html.TextBoxFor(m => m.FromDate)
<button type="submit">Search</button>
}
When you submit this form, you need an HTTP post action method to handle the submission. Because the view is bound to the view model, the action method will accept it as an input parameter:
[HttpPost]
public ActionResult Index(TestModel model)
{
// Do what you need to do
string date = model.FromDate;
return View(model);
}
Your way of doing it is also correct. I have just shown you an alternative way to do it. Some day you might have a huge form with many input values, then my approach will be 'cleaner'.
Try this:
1) Replace with [HttpPost] instead of [HTTPPost]
2) You should add name=" " for input like this:
<input id="fromDate" name="fromDate" type="text" class="datepicker" />
I am submiiting a form from view which contains input field with specific data attribute
<form>
<input type="text" data-user="001" name="mytext" />
</form>
this from is submitted to a controller
[HttpPost]
public ActionResult Settings(FormCollection formValues)
{
//here i can access input control's value by its name like
string user= formValues["mytext"];
}
but how i can get value of data-user attribute in controller?
I do not think you can do it. You can access session variable from controller like this, however:
string strsetting1 = (string)HttpContext.Session["setting1"];
In your Global.asax.cs:
protected void session_start()
{
Session["setting1"] = "Y";
}
I'd like to ask a very simple question from a rookie. I want to pass data from view Alpha.cshtml, into controller HomeController.cs with action Beta(), and then display this data in view Beta.cshtml.
Here's my Alpha.cshtml:
#using (Html.BeginForm("Beta", "Home", null, FormMethod.Post, null))
{
#Html.TextBox("data")
<input type="submit" value="Submit" />
}
Here's my Beta.cshtml:
<p>The submitted value is: #ViewBag.Data</p>
And here's my Beta() action:
public ActionResult Beta()
{
ViewBag.Data = ???
return View();
}
What do I put in place of the ???
Thanks!
When the form is submitted, all form input fields will be posted to the server. ModelBinding will take care of reading the posted values and supplying them to your action method in the list of parameters.
[HttpPost]
public ActionResult Beta(string data)
{
ViewBag.Data = data
return View();
}
I have a controller:
public class LanguageController : Controller
{
[HttpGet]
public ActionResult Index()
{
// populate viewModel from database
return PartialView(viewModel)
}
[HttpPost]
public ActionResult Index(string language)
{
LanguageCookie.Write(Response, language);
return RedirectToAction(ACTION, CONTROLLER, new {culture = language});
}
}
and its partial view:
#model MyModel
#using (Html.BeginForm("Index", "Language"))
{
#Html.DropDownList(
Model.SelectedLanguageShortName,
Model.AllLanguages
)
<input type="submit" value="Select" />
}
which I render in _Layout.cshtml:
<div>
#Html.Action("Index", "Language")
</div>
Please let me know how can I get ACTION/CONTROLLER names of main (not partial) controller, from my LanguageController was called. I need this information on the postback where I set cookie and want to redirect user on the same page but with prefered language.
I have found this example:
var rd = ControllerContext.ParentActionViewContext.RouteData;
var currentAction = rd.GetRequiredString("action");
var currentController = rd.GetRequiredString("controller");
But ControllerContext.ParentActionViewContext is null in the postback. I am able to get what I need in the view but it is ugly:
#Html.Hidden("Controller", HttpContext.Current.Request.RequestContext.RouteData.Values["controller"].ToString());
#Html.Hidden("Action", HttpContext.Current.Request.RequestContext.RouteData.Values["action"].ToString());
How to get the same information in the controller scope?
When Index(string language) is processed ParentActionViewContext is null because this is another request to server and it doesn't know anything about previous request that invoked child action.
Instead of storing control and action in hidden field you can store the whole address and invoke Redirect:
#model MyModel
#using (Html.BeginForm("Index", "Language", new { redirectUrl = Request.Url }))
{
#Html.DropDownList(
Model.SelectedLanguageShortName,
Model.AllLanguages
)
<input type="submit" value="Select" />
}
and then
[HttpPost]
public ActionResult Index(string language, string redirectTo)
{
LanguageCookie.Write(Response, language);
return Redirect(redirectTo);
}
Another way is to save CONTROLER and ACTION in TempData, but in this way you can have problem if somebody open multiple pages of your site.
Third solution is to invoke that method with Ajax and when response arrive reload the page with javascript.
Pretty Basic one here guys.
I have a View which holds 2 textfields for input and a submit button
<%using (Html.BeginForm("DateRetrival", "Home", FormMethod.Post)){ %>
<%=Html.TextBox("sday")%>
<%=Html.TextBox("eday")%>
<input type="submit" value="ok" id="run"/>
<% }%>
the following controller action which I want to bind the data input is as follows
[AcceptVerbs(HttpVerbs.Get)]
public ActionResult DateRetrival()
{
return View();
}
[AcceptVerbs(HttpVerbs.Post)]
public ActionResult DateRetrival(string submit)
{
return null;
}
When I debug this and look in the action methods parameter, the value is null. When I've entered values in both textboxes and and clicked the submit method.
You probably want to do something like this:
[AcceptVerbs(HttpVerbs.Post)]
public ActionResult DateRetrival(string sday, string eday)
{
return null;
}
Ideally, though you probably want to be passing a model to your controllers:
[AcceptVerbs(HttpVerbs.Post)]
public ActionResult DateRetrival(DateModel dates)
{
var date1 = dates.sday;
var date2 = dates.eday;
return null;
}
See http://msdn.microsoft.com/en-us/library/dd394711.aspx
Add parameters to catch each input field value.
[AcceptVerbs(HttpVerbs.Post)]
public ActionResult DateRetrival(string sday, string eday)
{
return null;
}
Try:
[AcceptVerbs(HttpVerbs.Post)]
public ActionResult DateRetrival(string sday, string eday, string submit)
{
return null;
}
and if you want sumbit button value
<input type="submit" value="ok" id="run" name="submit"/>
If you want to have value posted, name attribute has to be set. Html.TextBox automatically sets name from parameter.