ASP.Net MVC How to pass data from view to controller [closed]

Question

I am completely new to ASP.Net and I am sure this is a very basic question I have a View in which there is a link to generate report but to be able to generate report I must ask the user to provide a suitable text name as well.

So far I have been able to pass data from server to view using Models passed from my controller to view, but I am not sure how to Pass data from view to my controller.

I just need to pass a string from view to controller in this case.

Any advice with example will be appreciated.

UPDATE

I understand I have to post the data back to server but how does that realize in the form of razorhtml code and controller?

Answer 1

You can do it with ViewModels like how you passed data from your controller to view.

Assume you have a viewmodel like this

public class ReportViewModel {    public string Name { set;get;} } 

and in your GET Action,

public ActionResult Report() {   return View(new ReportViewModel()); } 

and your view must be strongly typed to ReportViewModel

@model ReportViewModel @using(Html.BeginForm()) {   Report NAme : @Html.TextBoxFor(s=>s.Name)   <input type="submit" value="Generate report" /> } 

and in your HttpPost action method in your controller

[HttpPost] public ActionResult Report(ReportViewModel model) {   //check for model.Name property value now   //to do : Return something } 

OR Simply, you can do this without the POCO classes (Viewmodels)

@using(Html.BeginForm()) {    <input type="text" name="reportName" />    <input type="submit" /> } 

and in your HttpPost action, use a parameter with same name as the textbox name.

[HttpPost] public ActionResult Report(string reportName) {   //check for reportName parameter value now   //to do : Return something } 

EDIT : As per the comment

If you want to post to another controller, you may use this overload of the BeginForm method.

@using(Html.BeginForm("Report","SomeOtherControllerName")) {    <input type="text" name="reportName" />    <input type="submit" /> } 

Passing data from action method to view ?

You can use the same view model, simply set the property values in your GET action method

public ActionResult Report() {   var vm = new ReportViewModel();   vm.Name="SuperManReport";   return View(vm); } 

and in your view

@model ReportViewModel <h2>@Model.Name</h2> <p>Can have input field with value set in action method</p> @using(Html.BeginForm()) {   @Html.TextBoxFor(s=>s.Name)   <input type="submit" /> }