使用下拉列表中的动态值设置属性

Question

Here i want to set a attribute "selected" in a dynamic drop down when it is clicked after HttpPost in MVC it shows the same first text "Please select a category".

@if (Model.objlist1.Count != 0) {
    <select id="catID" onchange="getID();this.form.submit();">
        <option id="removeIT" value="007">Please select a category</option>
        @foreach (var item in Model.objlist1) {
            //a++;
            <option value="@item.categoryID">@item.category</option>
        }
    </select>
    @Html.HiddenFor(m => m.categoryID, new { @id = "newCatID", @name = "newCatID" })
}

After reload from HttpPost i want to get the "selected" attribute in the dynamic drop down within foreach loop option tag by using the value to check and set attribute "selected" in option tag.

Answer 1

try like this In backend pass category

 ViewData["category"] =  new SelectList(
new List<SelectListItem>
{
    new SelectListItem { Text = "Cat1", Value = 1},
    new SelectListItem { Text = "Cat2", Value = 2},
}, "Value" , "Text");

in your view

@Html.DropDownListFor(model => model.categoryID,  ViewData["category"] as IEnumerable<SelectListItem>, "Please select a category")