I'm trying to set multiple values in a select list:
SelectList List = new SelectList(MyListItems, "valField", "dataField", <selected values>);
What object/values do I use for to select multiple items?
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3 Answers
You want to use MultiSelectList instead which has a constructor to meet your needs:
public MultiSelectList(
IEnumerable items,
string dataValueField,
string dataTextField,
IEnumerable selectedValues
)
5 Comments
Mariah
okay...will that work with @Html.DropDownList() in my razor code?
Robert Levy
no, you'll have to use Html.ListBox... native HTML dropdown lists don't support multi-select. See blog.garypretty.co.uk/index.php/2010/02/26/…
Matus
@RobertLevy you can use the DropDownList like this: @Html.DropDownList("yourName", yourMultiSelectList, new { multiple = "" })
Tiramonium
@Matus I know I'm "coming from the future" now, but it's better to stick to Html.ListBox / Html.ListBoxFor since Razor, for some reason, doesn't "remember" the previously selected options properly when using DropDownList or DropDownListFor with a MultiSelectList.
Alvindra Dutt
Perfect was looking for the MultiSelect Option for 2 days now
Example:
class Person
{
int Id{ get; set; }
string Name { get; set; }
}
...
var people = new List<Person>()
{
new Person{ Id = 1, Name = "Steve" },
new Person{ Id = 2, Name = "Bill" },
new Person{ Id = 3, Name = "John" },
new Person{ Id = 4, Name = "Larry" }
}
SelectList List = new MultiSelectList(people, "Id", "Name", new[]{ 2, 3 });
Comments
Use the The Harvest Chosen jQuery plugin. See my tutorial Working with the DropDownList Box and jQuery which shows how to do this.
