Problem with ASP.NET MVC DropDownList not displaying selected value

Question

I have an aspx page which allows me to edit articles. Among things I can edit is which category the article belongs to. The category is chosen through a DropDownList as shown here,

<%= Html.DropDownList("categoryID", (IEnumerable<SelectListItem>)ViewData["CategoryID"], new { @class = "textbox" }) %>

However, the articles category isn't selected when I go to that page. The ViewData I use for the DropDownList looks like this,

ViewData["CategoryID"] = new SelectList(categories, "CategoryID", "Title", article.CategoryID);

Which should select the article.CategoryID as it's selected value. Have I done this wrong?

Tomas Aschan · Accepted Answer · 2010-01-30 11:29:04Z

1

You're assigning the ViewData property a SelectList, but casting it to IEnumerable<SelectListItem> - try typing directly to SelectList instead:

<%= Html.DropDownList("categoryId", (SelectList)ViewData["CategoryID"], new { @class = "textbox" }) %>

answered Jan 30, 2010 at 11:29

Tomas Aschan

61.2k62 gold badges268 silver badges425 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Jova Over a year ago

No, this made no difference. When going to editArticle.aspx the dropdownlist is still not displaying the correct category for the article.

Sofox · Accepted Answer · 2010-06-18 10:49:47Z

0

The best I could suggest is that you ensure your "Category" class has a property called "CategoryID" and is not just "ID". From what you've given us that's the best guess I can make as to the problem.

If it is just "ID", then your function will need to go:

ViewData["CategoryID"] = new SelectList(categories, "ID", "Title", article.CategoryID);

answered Jun 18, 2010 at 10:49

Sofox

5,3381 gold badge22 silver badges10 bronze badges

Collectives™ on Stack Overflow

Problem with ASP.NET MVC DropDownList not displaying selected value

2 Answers 2

1 Comment

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

1 Comment

Comments

Your Answer

Sign up or log in

Post as a guest

Related