MVC Transfer Data Between Views

Question

I just started to learn MVC and am trying to understand how it works.

I don\'t want to send users to different views for all edit, insert and list operations.

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Answer 1

You need to use Post Redirect Get PRG pattern.

Please read this Use PRG Pattern for Data Modification section in this blog post by Kazi Manzur Rashid.
http://weblogs.asp.net/rashid/archive/2009/04/01/asp-net-mvc-best-practices-part-1.aspx

This approach uses TempData to maintain ModelState data between redirects.

[HttpPost, ValidateAntiForgeryToken, ExportModelStateToTempData]
public ActionResult Create(FormCollection form)
{
    Product p = new Product();

    if (TryUpdateModel(p))
    {
        productRepository.CreateProduct( p );
    }
    else
    {
        // add additional validation messages as needed
        ModelState.AddModelError("_generic", "Error Msg");
    }

    return RedirectToAction("Index");
}

And here is your Index action method.

[ImportModelStateFromTempData]
public ActionResult Index()
{
    IList products = productRepository.GetAll();
    return View("Index", products);
}

And here is your Index view.

<%@ Page Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage>" %>


    Index



    
Products

    <% foreach (var p in Model) { %>
        
<%= Html.Encode( p.ProductName ) %>
    <% } %>

    <%= Html.ValidationSummary("Please correct the errors", new { id = "valSumCreateForm" }) %>
    <% using (Html.BeginForm("Create", "Product")) { %>
        Product Name: <%= Html.TextBox("ProductName") %>
        <%= Html.AntiForgeryToken() %>
        <% ViewContext.FormContext.ValidationSummaryId = "valSumCreateForm"; %>
    <% } %>

1. The ImportModelStateFromTempData and ExportModelStateToTempData attributes helps transfer model state errors between redirects. This
2. <% ViewContext.FormContext.ValidationSummaryId = "valSumCreateForm"; %> associates the MVC Form with its corresponding Validation Summary.

You can check another answer by me on this here as well. ViewModel with SelectList binding in ASP.NET MVC2

Let me know if you have any question.
-Soe