dynamic control disappears when i refresh or close the page

vidhya

13y2.8k.NET

I need to add the control in the page at the run time. i have a code to add the control dynamically. but the control disappears when i refresh the page or close the page. i need to display the controls in the page itself when i refresh or close the page.

@using (Html.BeginForm())
{

2. Statements & Responses

}

22 Replies

Know the answer? Post it — somebody with the same question will find it here.

Iftikar Hussain13y ago
instead of this use normal for loop

@using (Html.BeginCollectionItem("MatchingQuestionModel"))
{

@Html.LabelFor(m => m.QuestionTitle)
@Html.EditorFor(m => m.QuestionTitle)
}

Regards,
Iftikar
vidhya13y ago

@using (Html.BeginCollectionItem("MatchingQuestionModel"))
{

@Html.LabelFor(m => m.QuestionTitle)
@Html.EditorFor(m => m.QuestionTitle)
}

@using (Html.BeginForm())
{

@Html.ActionLink("Add", "QuestionCreateMatching", "Test", new { id = "addItem" }, null)
}

I am getting ,

Compiler Error Message: CS1061: 'System.Web.Mvc.HtmlHelper' does not contain a definition for 'BeginCollectionItem' and no extension method 'BeginCollectionItem' accepting a first argument of type 'System.Web.Mvc.HtmlHelper' could be found (are you missing a using directive or an assembly reference?)
Iftikar Hussain13y ago
what issue you are getting now?

Regards,
Iftikar
vidhya13y ago
it does not work.
Iftikar Hussain13y ago
please refer this link. it is in mvc2

http://blog.stevensanderson.com/2010/01/28/editing-a-variable-length-list-aspnet-mvc-2-style/

Regards,
Iftikar
vidhya13y ago
what scenario you thought?

how do i submit to the page?
Iftikar Hussain13y ago
then you do it using only for loop. On click of add button, submit the page and increment the counter in your control and bind it in forloop.

Regards,
Iftikar
vidhya13y ago
5 control needs to be display. it should be happen in add button not in save button.
Iftikar Hussain13y ago
tell me one thing, today I have created 5 control. Then I visit the same after 2 day, that how many control should display to me?

Regards,
Iftikar
vidhya13y ago
see the attachment file. it does not related to save button.

When i click it should add. it should appear when i refresh the page or close the page.
vidhya13y ago
Iftikar,

Without clicking the save button, i need the controls stable on the page.
Iftikar Hussain13y ago
do you want to display by default any textbox or not. If not then remove this line and the for loop which was shown to you earlier will take care.

Regards,
Iftikar
vidhya13y ago

If i use there(bolded text) it displays at any time. how can i use for loop there.
Iftikar Hussain13y ago
have one save button and in controller read the hidden value count and store it in your database. so when next time you load the page read the count from the db and assign to ViewBag.ControlCount

in your cshtml

@using (Html.BeginForm("Save", "Home"))
{

2. Statements & Responses

@for(int i=0;i

}

}

in your controller

public ActionResult About()
{
int controlCount = 0;
if (Session["ControlCount"] != null)
{
controlCount = Convert.ToInt32(Session["ControlCount"]);
}
ViewBag.ControlCount = controlCount;
return View();
}

[HttpPost]
public ActionResult Save(FormCollection formCollection)
{
var data = formCollection["hdnControlCount"];
Session["ControlCount"] = data;
return RedirectToAction("About");
}

Regards,
Iftikar
vidhya13y ago
now i can click.but still it disappears when refresh. how do i create the control at page load event by the count value.
Iftikar Hussain13y ago
I am able to do it. Try like this

@using (Html.BeginForm())
{

2. Statements & Responses

}

Regards,
Iftikar
vidhya13y ago
still it looks like same. how do i create the control at page load event by the count value.
Iftikar Hussain13y ago
try like this

@using (Html.BeginForm())
{

2. Statements & Responses

}

Regards,
Iftikar
vidhya13y ago
Iftikar Hussain13y ago
if you maintain in global variable, then once you close your application at that time what should happen. Does it mean you need only when the session is active?

Regards,
Iftikar
vidhya13y ago
I think we can maintain the count in global variable in the page. According to the count we can create the control. But i did not know how to implement it. it should display in the page load as well as button click event.
Iftikar Hussain13y ago
Hi,
You need to store number of dynamic controls created in your database and when you load next time the same page depend on the count you can create those many number of controls. I believe you are also saving the data for each dynamic control so while creating the control you can also bind the data which was saved earlier.

Regards,
Iftikar