How to pass a unique value along with dropdownlist selected value to action method

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I am using a dropdownlist with some static values in webgrid. and i want to pass a unique ID along with dropdownlist value to action method. How can i do this? I am using below code but its not working. @item.MessageId is the value i want to pass to an action method along with dropdown selected value. and how i can get that value in action?

HTML

@using (Html.BeginForm("ChangeMessagePriority", "Home", FormMethod.Post, new { id = @item.MessageId }))
{
  @Html.DropDownList("ddlPR1", listItems, new { onchange = "this.form.submit();" })
}

Posted 15-Sep-15 1:19am

Sumit Thakur

Updated 15-Sep-15 1:43am

Leo Chapiro

v3

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F-ES Sitecore · Accepted Answer · 2015-09-15T01:38:00

Use a hidden field

C#

@using (Html.BeginForm("ChangeMessagePriority", "Home", FormMethod.Post, new { id = @item.MessageId }))
 {
   <input type="hidden" value="myhiddenvalue" />
 @Html.DropDownList("ddlPR1", listItems, new { onchange = "this.form.submit();" })
 }

how that value is populated depends on where the data is coming from. You can also make it part of the model and use Html.HiddenFor(m => m.MyHiddenValue)