Controller can't receive model data [duplicate] - asp.net-mvc

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Post an HTML Table to ADO.NET DataTable
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Closed 6 years ago.
Hi I want to grab all user modify data.
My question is why controller can't receive the model data from View in my project.
Please explain why this error was caused and how to solve it.
Models:
public class ShoppingCart
{
public List<ShoppingCartItemModel> items = new List<ShoppingCartItemModel>();
public IEnumerable<ShoppingCartItemModel> Items
{
get { return items; }
}
}
public class ShoppingCartItemModel
{
public Product Product
{
get;
set;
}
public int Quantity { get; set; }
}
Controller
[HttpPost]
public RedirectToRouteResult EditFromCart(ShoppingCart MyModel)
{
ShoppingCart cart = GetCart();
foreach (var CartItem in cart.items)
{
foreach (var ReceiveModelItem in MyModel.items)
{
if (CartItem.Product.ProductID == ReceiveModelItem.Product.ProductID)
{
CartItem.Quantity = ReceiveModelItem.Quantity;
}
}
}
return RedirectToAction("Index", "ShoppingCart");
}
View
#model ShoppingCart
#{
ViewBag.Title = "購物車內容";
}
<h2>Index</h2>
<table class="table">
<thead>
<tr>
<th>
Quantity
</th>
<th>
Item
</th>
<th class="text-right">
Price
</th>
<th class="text-right">
Subtotal
</th>
</tr>
</thead>
<tbody>
#using (Html.BeginForm("EditFromCart", "ShoppingCart", FormMethod.Post))
{
foreach (var item in Model.items)
{
<tr>
<td class="text-center">
#item.Product.ProductName
</td>
<td class="text-center">
#item.Product.Price.ToString("c")
</td>
<td class="text-center">
#( (item.Quantity * item.Product.Price).ToString("c"))
</td>
<td class="text-left">
#Html.EditorFor(model => item.Quantity, null, "UserInputQuantity")
#Html.Hidden("ProductId", item.Product.ProductID)
</td>
</tr>
}
<tr>
<td colspan="3">
<input class="btn btn-warning" type="submit" value="Edit">
</td>
</tr>
}
</tbody>
</table>

You must explicitly create a hidden input for each property in your complex object that you want to be bound. IEnumerables and binding don't play very nicely directly out of the box - it looks like MVC has better base support for IList<> and arrays, but you'll still have to enumerate the collection and create hidden inputs for each item. Have a look at this link. So, ideally your view should be:
#model ShoppingCart
#{
ViewBag.Title = "購物車內容";
}
<h2>Index</h2>
<table class="table">
<thead>
<tr>
<th>
Quantity
</th>
<th>
Item
</th>
<th class="text-right">
Price
</th>
<th class="text-right">
Subtotal
</th>
</tr>
</thead>
<tbody>
#using (Html.BeginForm("EditFromCart", "ShoppingCart", FormMethod.Post))
{
for (int i = 0; i < Model.items.Count(); ++i)
{
<tr>
<td class="text-center">
#Model.items[i].Product.ProductName
</td>
<td class="text-center">
#Model.items[i].Product.Price.ToString("c")
</td>
<td class="text-center">
#( (Model.items[i].Quantity * Model.items[i].Product.Price).ToString("c"))
</td>
<td class="text-left">
#Html.EditorFor(model => Model.items[i].Quantity)
#Html.HiddenFor(model => Model.items[i].Product.ProductID)
#Html.HiddenFor(model => Model.items[i].Product.ProductName)
#Html.HiddenFor(model => Model.items[i].Product.Price)
</td>
</tr>
}
<tr>
<td colspan="3">
<input class="btn btn-warning" type="submit" value="Edit">
</td>
</tr>
}
</tbody>
</table>

Names are not correctly set for your text and hidden inputs:
#Html.EditorFor(model => item.Quantity, null, "UserInputQuantity")
#Html.Hidden("ProductId", item.Product.ProductID)
If you inspect elements you can see names are UserInputQuantity and ProductId, but they should be
items[i].Quantity and items[i].Product.ProductID respectively.
You can take a look at this link:
MVC Model binding of complex objects

Related

Not showing partial view result inside table body in asp.net MVC

I have written code to implement search using ajax in asp.net MVC. I have written an action inside my controller (Admincontroller) using partial view which is supposed to fetch data. I want to display the partial view result inside table body in my Index page.
The search function is working fine, but it is not displaying the result inside table body with id "searchresult" (Inside Index page). instead of that it is giving result. I wanted the result from search in table format. now result is displayed like below in http://localhost:1274/Admin/Search.
2786 Mens L/S 4000
here is my Index.cshtml
#model IEnumerable<TestEntityFramework.Models.trProducts>
#{
ViewBag.Title = "Index";
Layout = "~/Views/Shared/_AdminLayout.cshtml";
AjaxOptions ajax = new AjaxOptions
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<script src="~/scripts/jquery.unobtrusive-ajax.min.js"></script>
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<div>
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</div>
</div>
<div class="panel-body">
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<tr>
<th>
#Html.DisplayNameFor(model => model.prod_type)
</th>
<th>
#Html.DisplayNameFor(model => model.prod_name)
</th>
<th>
#Html.DisplayNameFor(model => model.prod_desc)
</th>
<th>
#Html.DisplayNameFor(model => model.prod_price)
</th>
<th>
#Html.DisplayNameFor(model => model.prod_qty)
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<th>
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<th></th>
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<td>
#Html.DisplayFor(modelItem => item.prod_type)
</td>
<td>
#Html.DisplayFor(modelItem => item.prod_name)
</td>
<td>
#Html.DisplayFor(modelItem => item.prod_desc)
</td>
<td>
#Html.DisplayFor(modelItem => item.prod_price)
</td>
<td>
#Html.DisplayFor(modelItem => item.prod_qty)
</td>
<td>
#Html.DisplayFor(modelItem => item.prod_category)
</td>
<td>
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</td>
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<div class="col-lg-8">
<table class="table table-bordered table-striped table-hover">
<thead>
<tr>
<th>
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</th>
<th>
Product Name
</th>
<th>
Price
</th>
<th>
</th>
</tr>
</thead>
<tbody id="searchresult">
#Html.Action("Search", new { pr_name = "" })
</tbody>
</table>
#using (Ajax.BeginForm("Search", ajax))
{
<div id="Loadhere">
#Html.TextBox("pr_name")
<button class="btn btn-primary">Search</button>
</div>
}
</div>
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#model IEnumerable<TestEntityFramework.Models.trProducts>
#foreach(var m in Model)
{
<tr>
<td>
#m.product_id
</td>
<td>
#m.prod_name
</td>
<td>
#m.prod_price
</td>
</tr>
}

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var netamount = collection["AmountModel.DenormalizedNetAmount"]; //correct value!
...
}
Do NOT specify the Name property when using the strong-typed (***For) helpers.
See the MVC Data Editors - Model Binding and Editing learning resource on the DevExpress forum.

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I'm creating a project for my institute. Using Asp.net MVC, I need multiple delete option with selected checkbox.
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This could be a way to achieve it:
First embed the table within a named form, that executes the batch delete action, like so:
#{ Html.BeginForm("BatchDelete", "Book", FormMethod.Post, new { name = "tableForm" }); }
<table class="table table-striped table-condensed table-bordered">
<tr>
<th>
Select
</th>
<th>
#Html.ActionLink("Book Id", "Index", new { sortOrder = ViewBag.IdSortParm, currentFilter = ViewBag.CurrentFilter })
</th>
<th>
#Html.ActionLink("Title", "Index", new { sortOrder = ViewBag.NameSortParm, currentFilter = ViewBag.CurrentFilter })
</th>
<th>
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<th>
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<th class="text-center">
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<th>
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<th>Edit</th>
<th>Delete</th>
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#foreach (var item in Model)
{
<tr>
<td>
<input type="checkbox" name="deleteInputs" value="#item.BookId" />
</td>
<td>
#Html.DisplayFor(modelItem => item.BookId)
</td>
<td>
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{
id = item.BookId
})
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<td>
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</td>
<td>
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</td>
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</td>
<td>
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}
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<!-- Section for buttons -->
<div class="actions">
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</a>
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#{ Html.EndForm(); }
Note that after the table, before ending the form, I added a link that executes the submit of the form.
Now, on the controller side, asumming its name is "BookController":
public class BookController : Controller
{
// ...
[HttpPost]
public ActionResult BatchDelete(int[] deleteInputs)
{
// You have your books IDs on the deleteInputs array
if (deleteInputs != null && deleteInputs.Length > 0)
{
// If there is any book to delete
// Perform your delete in the database or datasource HERE
}
// And finally, redirect to the action that lists the books
// (let's assume it's Index)
return RedirectToAction("Index");
}
// ...
}
Notice that:
The first two parameter of the Html.BeginForm method, are the action name and controller name (without the "Controller" suffix).
The last parameter of the same method include the name of the form. The name is used in the javascript of the link, in order to indicate which form are you going to submit.
First, you need a different Id for each checkbox so you know which record is to be deleted. Second, if you implement "delete" as a link then the browser will perform a GET action instead of a POST. Assuming you are not using AJAX then you will need a form so you can POST to the controller action which handles the delete.

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