@html.radio button and implementing onchange javascript.

 

1. <form method="post">
2. @foreach (var gender in Model.Genders)
3. {
4. @Html.RadioButtonFor(model => model.Gender, gender) @gender<br />
5. }
6. <input type="submit"/>
7. </form>

1. [BindProperty, Required]
2. public string Gender { get; set; };
3. 


Working With Radio Buttons in ASP.NET Razor Pages | Learn Razor Pages

javascript on change

@Html.TextBoxFor(model => model.ExternalVenderNo, new { onchange = "OnChangeEvent()" })

<script type="text/javascript">
 function OnChangeEvent(){
    alert("value is changed");
    @Model.IsChanged = true;
 }
</script>

or

@Html.EditorFor(model => model.ExternalVenderNo)

<script type="text/javascript">
$('#ExternalVenderNo').change(function(){
    alert('Changed!');
    @Model.IsChanged = true;
});
</script>

asp.net mvc 4 - Html.EditFor Onchange Event - Stack Overflow