asp net razor pages asp for dropdownlistfor code example

Example 1: class selector to property in asp net core dropdown

<select data-val="true" data-val-required="The Employee field is required." id="Employee" name="Employee">    <option value=""></option>    <optgroup label="IT">        <option value="1">Mike</option>    </optgroup>    <optgroup label="Sales">        <option value="2">Pete</option>        <option value="4">Dean</option>    </optgroup>    <optgroup label="Admin">        <option value="3">Katy</option>    </optgroup></select>

Example 2: razor dropdownlistfor

@using MyMVCApp.Models

@model Student

@Html.DropDownListFor(m => m.StudentGender, 
            new SelectList(Enum.GetValues(typeof(Gender))), 
            "Select Gender")