Please help me ... I don't know how to write event for button. I placed button in the mvc 2 aspx file that i created. i want to write function to do some thing when the button is clicked.
[AcceptVerbs(HttpVerbs.Post)]
public ActionResult EvaluvateStudent(FormCollection collection)
{
Model.StudentModels studentDetail = new Model.StudentModels();
studentDetail.Name = collection["Name"];
studentDetail.RegNo = Convert.ToInt32(collection["RegNo"]);
studentDetail.Tamil = Convert.ToSingle(collection["Tamil"]);
studentDetail.English = Convert.ToSingle(collection["English"]);
studentDetail.Total = CalculateTotal(studentDetail.Tamil, studentDetail.English);
ViewData["Total"] = studentDetail.Total;
return View("Student");
}
public float CalculateTotal(float tamil,float english)
{
float total = tamil + english;
return total;
}
Related
I am using Razor WebGrid and my controller action is getting repeatedly called when click on sort by header or click on page links. First time it is getting called only once but next time onwards it is getting called repeatedly. Please can anyone help.
[HttpGet]
public ActionResult Index(int page = 1, string sort = "GridName", string sortDir = "ASC")
{
const int pageSize = 5;
string successMessage = string.Empty;
var message = string.Empty;
int pageIndex1 = page - 1;
if (RenderFirstTime == 1)
{
GridCRUDCollection.UpdateGridModelCollection(null, pageSize, pageIndex1, sort, sortDir);
RenderFirstTime = 0;
return View(GridCRUDCollection);
}
else
{
GridCRUDCollection.UpdateGridModelCollection(null, pageSize, pageIndex1, sort, sortDir);
return PartialView("GridDetailsView", GridCRUDCollection);
}
}
Code with an <img src="#" ... > is what did it for me. Once I removed the #'s the controller got called just once. The grid may be generating those and populating them later via Javascript. One way to diagnose it is to use LabJS to prevent immediate execution.
I have a MVC3 Razor form. It have a radiobutton list and some another text fields. When I press submit controller post action get the view model, which have all fields seted correctly, except RegionID.
Model:
namespace SSHS.Models.RecorderModels
{
public class CreateViewModel
{
...
public int RegionID { get; set; }
...
}
}
Controller:
namespace SSHS.Controllers
{
public class RecorderController : Controller
{
...
public ActionResult Create()
{
EntrantDBEntities db = new EntrantDBEntities();
List Regions = new List(db.Region);
List Schools = new List(db.School);
List Settlements = new List(db.settlement);
CreateViewModel newEntr = new CreateViewModel();
ViewBag.Regions = Regions;
ViewBag.Schools = Schools;
ViewBag.Settlements = Settlements;
return View(newEntr);
}
[HttpPost]
public ActionResult Create(CreateViewModel m)
{
EntrantDBEntities db = new EntrantDBEntities();
Entrant e = new Entrant()
{
FatherName = m.FatherName,
Lastname = m.LastName,
LocalAddress = m.LocalAddress,
Name = m.Name,
RegionID = m.RegionID,
PassportID = m.PassportID,
SchoolID = m.SchoolID,
SettlementID = m.SattlementID,
TaxID = m.TaxID,
};
db.Entrant.AddObject(e);
db.SaveChanges();
return RedirectToAction("Index");
}
}
View:
#model SSHS.Models.RecorderModels.CreateViewModel
#using SSHS.Models
#using (Html.BeginForm("Create", "Recorder", FormMethod.Post))
{
#foreach (Region item in ViewBag.Regions)
{
#Html.RadioButtonFor(m => m.RegionID, item.RegionID)
#Html.Label(item.RegionName) - #item.RegionID
}
...
...
}
The Create(CreateViewModel m) method gets data from all textboxes normaly, but RegionID always is 0.
How are you planning to fill radio button with int ? It have two states: checked and not. Could you tell us, what are you trying to do? Make radio group? Use bool for RadioButtonFor.
Added:
You need to write something like this: CheckboxList in MVC3.0 (in your example you will have radio buttons)
I have a javascript function from which I need to call a controller action to return the filestream to the UI .
I am not getting the open,save and save as dialog box.
In the cshtml file I have following function:DownloadFile
var selectUrl = '#Url.Action("Download", "Controller")' + "/" + filedetails;
$.post(selectUrl);
and in the controller I have the following code:
public ActionResult Download(string id)
return File(downloadStream, "application/octet-stream",fileName);
Please let me know is this the correct way of calling.
try this way :ActionResult
public ActionResult Download(string id)
{
var cd = new System.Net.Mime.ContentDisposition
{
FileName = "imagefilename",
Inline = false,
};
Response.AppendHeader("Content-Disposition", cd.ToString());
string contentType = "application/octet-stream";
// you are downloadStream
return File(downloadStream, contentType);
}
link here
I just want to generate a pdf document of the details presents in view on button click.
In order to generate a PDF file you will need some third party library as this functionality is not built-in the .NET framework. iTextSharp is a popular one.
So for example you could write a custom action result:
public class PdfResult : ActionResult
{
public override void ExecuteResult(ControllerContext context)
{
var response = context.HttpContext.Response;
response.ContentType = "application/pdf";
var cd = new ContentDisposition
{
Inline = true,
FileName = "test.pdf",
};
response.AddHeader("Content-Disposition", cd.ToString());
using (var doc = new Document())
using (var writer = PdfWriter.GetInstance(doc, response.OutputStream))
{
doc.Open();
doc.Add(new Phrase("Hello World"));
}
}
}
and then have your controller action return this result:
public class HomeController : Controller
{
public ActionResult Index()
{
return new PdfResult();
}
}
If I have the following code (EDIT: Sorry if I wasn't clear, I want to encapsulate the following (forget about the view its calling), so that I could do other stuff within the ActionResult):
public ActionResult ModelBased(string[] items, PostedItems postedItems) {
var model = new ItemsViewModel();
var selectedItems = new List<Item>();
var postedItemIDs = new string[0];
if (postedItems == null) postedItems = new PostedItems();
if (items!= null && items.Any()) {
postedCityIDs = items;
postedItems.ItemIDs = items;
}
if (postedItems.ItemIDs != null && postedItems.ItemIDs.Any()) {
postedItemIDs = postedIems.ItemIDs;
model.WasPosted = true;
}
if (postedItemIDs.Any())
selectedItems = ItemRepository.GetAll()
.Where(x => postedItemIDs.Any(s => x.Id.ToString().Equals(s))).ToList();
model.AvailableItems = ItemRepository.GetAll();
model.SelectedItems = selectedItems;
model.PostedItems = postedItems;
return View(model);
}
How might I reuse it in different Actions in my controller without having to copy/paste. I tried doing a private method with the code. But I am stuck on:
Either calling it wrong within an action method : private void Item (Item item) {//copied code from above} then calling Item(item); in the action; or
It has something to do with the (string[] items, PostedItems postedItems) that I am doing wrong; or
Something entirely different that I am not doing right.
Any examples would be much appreciated.
EDIT: The code above works with a CheckBoxList. It's one particular CheckBoxList. But I want to be able to use it in other views without having to copy/paste the code to other ActionResults. Just calling the ActionResult won't work, because I plan on doing other things. In particular, I have code for wizards in each ActionResult, such as:
if ((nextButton != null) && ModelState.IsValid)
return RedirectToAction("EMailConfirm");
return View("EMail/BasicDetails", myData);
which are returning specific views, so call to just the ActionResult won't work, unless I am missing something.
return View(model); tries to find a view for the original action.
Specify return View("ModelBased", model); to always render the view named "ModelBased"
public void SomeAction(string[] items, PostedItems postedItems)
{
// Modify the data as your like
return ModelBased(string[] items, PostedItems postedItems);
}
public void SomeOtherAction(string[] items, PostedItems postedItems)
{
// Modify the data as your like
return ModelBased(string[] items, PostedItems postedItems);
}
private ActionResult ModelBased(string[] items, PostedItems postedItems) {
var model = new ItemsViewModel();
var selectedItems = new List<Item>();
var postedItemIDs = new string[0];
if (postedItems == null) postedItems = new PostedItems();
if (items!= null && items.Any()) {
postedCityIDs = items;
postedItems.ItemIDs = items;
}
if (postedItems.ItemIDs != null && postedItems.ItemIDs.Any()) {
postedItemIDs = postedIems.ItemIDs;
model.WasPosted = true;
}
if (postedItemIDs.Any())
selectedItems = ItemRepository.GetAll()
.Where(x => postedItemIDs.Any(s => x.Id.ToString().Equals(s))).ToList();
model.AvailableItems = ItemRepository.GetAll();
model.SelectedItems = selectedItems;
model.PostedItems = postedItems;
return View(model);
}
Your example is unclear, however, I would normally move common functionality into a seperate method and mark it with [NonAction] attribute. E.g.
[NonAction]
protected UserInfo GetUserInfo(string username)
{
// Return relevant data
}
I would then call GetUserInfo in your action method.
Edit:
You need to look into partial views. You can think of a partial view as a control that you can re-use on multiple pages. For example, I can put a login control in a partial view and renged it on multiple pages. This will promote code re-usability.
I can't give you the example as I haven't done this for a while, but you'd have to do the following:
Instead of return View(); you'll have to return PartialView("_NameOfYourPartialView", viewModel);
Modify your view, so it's no longer a view, but a partial view.
You'll need to do a bit of reading and try it out for yourself.
Good luck
You can call this action from another action that returns ActionResult.
public ActionResult OtherAction()
{
return ModelBased(items, postedItems);
}
Also, why private void? Which part do you actually want to reuse? If it takes an Item and returns ItemsViewModel, it should be private ItemsViewModel - depends on the part you want to reuse. void doesn't return anything.