@html.dropdownlistfor disable one item if condition

Question

I am doing and MVC Application and I have a DropDownListFor and I need to Disable an Item depend on Condition..

Here is my DropDownList

 @Html.DropDownListFor(model => Model.SubsidyPlanType, new SelectList(new Dictionary<string, string> { { "", "" }, { "1", "Dollar" }, { "2", "Percentage" }, { "3", "Active" } }, "Key", "Value"), new { id = "Type", @class = "form-control form-select" })

I need Option 3 "Active" to be disable if condition Model.Value = "1"

How can I disable a single Item.?

Thanks

Answer 1

Try the following example to set Disabled property that indicates whether this SelectListItem is disabled:

@Html.DropDownListFor(model => Model.SubsidyPlanType,
      new Dictionary<string, string> { { "", "" }, { "1", "Dollar" }, { "2", "Percentage" }, { "3", "Active" } }
      .Select(d =>
      {
          return new SelectListItem() { Disabled = (d.Key == "3"), Text = d.Value, Value = d.Key };
      }),
      new { id = "Type", @class = "form-control form-select" })