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AnswerRe: The use of two drop down list Pin
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QuestionMVC Model Binding Pin
MadDashCoder19-Jul-16 6:31
MadDashCoder19-Jul-16 6:31 
I am trying to understand how MVC Model Binding works so that I can switch from using a Textbox to using a Dropdownlistbox.

In my Edit View I have a form that allows users to Edit a product after modifying its Name, Price, and CategoryId.

The Merchandise's CategoryID is the Primary Key in the Categories table and a Foreign Key in the Merchandise table in the database.

Instead of making users enter a number for the CategoryID I want them to select a CategoryName from a Dropdownlistbox. Once a CategoryName in the Dropdownlistbox is selected the CategoryID is selected automatically.

I have tried to use the following code in my ProductController but it is not working.
HTML
[HttpGet]
public ActionResult Edit(string id)
{
 MerchandiseServiceClient msc = new MerchandiseServiceClient();            
 MerchandiseViewModel mvm = new MerchandiseViewModel();
 mvm.Merchandise = msc.FindMerchandiseByID(id);
 ViewBag.CategoryList = new SelectList(msc.FindAllCategories(), "ID", "Name");

     return View("Edit", mvm);   
}

[HttpPost]
public ActionResult Edit(MerchandiseViewModel mvm)
{
  MerchandiseServiceClient msc = new MerchandiseServiceClient();            
  msc.EditMerchandise(mvm.Merchandise);           
     return RedirectToAction("Index");
}
 
// --------------Edit View-------------------------------------
 <tr>  
   <td>@Html.LabelFor(model=>model.Category.ID, "Category")</td> 
   <td> @Html.DropDownList("CategoryList", "Select Category")</td>    
</tr>

How can I change my code above to use the dropdownlistbox?

modified 19-Jul-16 13:21pm.

AnswerRe: MVC Model Binding Pin
Richard Deeming19-Jul-16 8:01
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GeneralRe: MVC Model Binding Pin
MadDashCoder19-Jul-16 19:47
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AnswerRe: MVC Model Binding Pin
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GeneralRe: MVC Model Binding Pin
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GeneralRe: MVC Model Binding Pin
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AnswerRe: MVC Model Binding Pin
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QuestionMessage Closed Pin
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AnswerRe: Switching From Textbox To Dropdownlistbox Pin
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