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Asked: 2026-05-23T04:54:08+00:00

I am trying to set the initial values for a list box using asp.net

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I am trying to set the initial values for a list box using asp.net mvc 3. It does fill in the options, but doesn’t select them.

Here is my code. This attempt uses a hardcoded set of values

@Html.ListBoxFor(Function(model) model.PageTags, New MultiSelectList(Model.PageTags, "ID", "TagEn", New Integer(){1,2})

I have also tried an example that I would expect would select all the values.

@Html.ListBoxFor(Function(model) model.PageTags, New MultiSelectList(Model.PageTags, "ID", "TagEn", Model.PageTags)
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1 Answer

  1. Editorial Team

    You have to pass the selected values as an enumerable of “values” (and not an enumerable of the original “items”). In your case this should be a list of IDs. E.g. to select all try to pass the selected values like this: Model.PageTags.Select(i => i.ID)

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