Remove Selected Item From DropDown

Question

How to Remove the Selected Item from DropdownList. Once the Item is Selected. Dropdown came from another Model.

 

My Model Looks given below;-

 

public int TaskId { get; set; }

[ForeignKey("TaskId")]

public virtual TaskMst TaskMst { get; set; }

[NotMapped]

public string Task { get; set; }

My Controller Looksgiven below:-

[HttpPost]

[ValidateAntiForgeryToken]

public async Task<ActionResult> Create(TaskEntry taskEntry)

{

if ((!string.IsNullOrWhiteSpace(taskEntry.strStartDate)) && (Utility.isDate(taskEntry.strStartDate, DateFormats.ddMMyyyy)))

taskEntry.StartDate = Utility.stringToDate(taskEntry.strStartDate, DateFormats.ddMMyyyy, DateFormats.MMddyyyy);

else

ModelState.AddModelError("strStartDate", "Invalid Start Date..");

if (ModelState.IsValid)

{

db.TaskEntries.Add(taskEntry);

await db.SaveChangesAsync();

return RedirectToAction("Index");

}

ViewBag.TaskId = new SelectList(db.TaskMsts, "TaskId", "Task");

return View(taskEntry);

}

 

My View Look Given below:-

 

<div class="form-group">

@Html.LabelFor(model => model.Task, "Task", htmlAttributes: new { @class = "control-label col-md-2" })

<div class="col-md-4">

@Html.DropDownList("TaskId", null, "--Select--", htmlAttributes: new { @id = "TaskId", @class = "form-control select2", @onchange = "getpriority();" })

@Html.ValidationMessageFor(model => model.Task, "", new { @class = "text-danger" })

</div>

</div>

 

Please Suggest how to Remove once they item selected from the Dropdown.