How to select the default value from a dropdownlist when using asp.net mvc?

Question

This might seem a pretty simple question;

I'm using the Pubs database with the Authors table. I have used Linq to SQL as my data access and I've created an edit view with ASP.net MVC. The last property of an author model is 'contract' which is a true/false value. What I am attempting to do is to create a DropDownList with the values 'yes' or 'no' and bind to that list when the pages loads with the value from the authors model.

Here is what I have for the DropDownList markup:

Html.DropDownList("dropDownList", new[]
{                        
   new SelectListItem { Text = "Yes", Value = "true" }, 
   new SelectListItem { Text = "No", Value = "false" } 
})

The view model comes back as this:

 model.contract

which is a boolean value of 'true' or 'false'.

What would be the easiest way set the correct value in the dropdown list using the model's value?

Answer

Instead of using just :

model.contract

I went ahead and used:

Model.contract

Which accessed the page level model which is where I needed to be. After that everything else came together.

stackoverflow.com/questions/624828/…

Kris Ivanov
– Kris Ivanov

2011-01-31 19:47:01 +00:00
Commented Jan 31, 2011 at 19:47 — Kris Ivanov
– Kris Ivanov, Commented Jan 31, 2011 at 19:47

meeron · Accepted Answer · 2011-01-31 20:06:21Z

1

i would consider using checkbox than drowpdown list:

@Html.CheckBox("checkbox", model.contract)

if you still want to use dropdown list try this:

Html.DropDownList("dropDownList", new[]
{                        
   new SelectListItem { Text = "Yes", Value = "true", Selected = ( model.contract == true) }, 
   new SelectListItem { Text = "No", Value = "false", Selected = ( model.contract == false )} 
})

answered Jan 31, 2011 at 20:06

meeron

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3 Comments

Nathan Over a year ago

This is correct. I would probably go with shorthand bool; model.contract and !model.contract for the Selected indicator. Make sure your view inherits with the model class. Inherits=System.Web.Mvc.ViewPage<Author>

Chris Over a year ago

Everything was correct except I needed to access the Page level Model. Going from lower case 'm' to upper case 'M' changed everything. Thanks for the help!

Chris Over a year ago

@Nathan, I went ahead and used the shorthand notation since it made a little more since when reading it as code. Thanks!

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