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Editorial Team
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Asked: 2026-06-09T21:35:17+00:00

I want to postback and pass in a parameter onchange . I have @Html.DropDownList(CategoryID,

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I want to postback and pass in a parameter onchange. I have

@Html.DropDownList("CategoryID", (System.Collections.Generic.IEnumerable<System.Web.Mvc.SelectListItem>)@Model.PhaseNames, new { @onchange = "location.href='/Home/Index?phaseFilter=this.value;'" })

This nearly works. this.value is not replaced with the selected option value as I would expect. Also, is there a better way to create the URL in this case?

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1 Answer

  1. Editorial Team

    This should work:

    @Html.DropDownList("CategoryID", (IEnumerable<SelectListItem>)@Model.PhaseNames, new { @onchange = "location.href='/Home/Index?phaseFilter=' + this.value;" })
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