ASP.Net How remove/ignore validation from specific elements upon submit?

Question

I have an ASP.Net Core project with a simple form that has two radio buttons. One radio button has a drop-down and the other has a text-box. If the user selects the first radio button, I would like to remove/ignore the validation for the text-box (since its empty) when the user press the submit button. Vice versa, if the user selects the second option, I would like to remove/ignore the validation from the drop-down. I have tried a bunch of jQuery methods found on StackOverflow but none have work. Model: public class EnrollmentModel : BaseModel { ... public bool PriceOption { get; set; } [Required(ErrorMessage = "Please select a rate plan")] public string SelectedRatePlan { get; set; } public IEnumerable RatePlans { get; set; } [Required] public string CustomRate { get; set; } ... } } View:

@Html.RadioButtonFor(x => Model.PriceOption, true, htmlAttributes: new { @id = "comed", @class = "col-md-1" }) @Html.Label("Use price from current rate plans") @Html.DropDownListFor(x => Model.SelectedRatePlan, new SelectList(Model.RatePlans, "Value", "Text"), htmlAttributes: new { @class = "form-control", id = "rateplans", style = "width:100px;", required = "Select Rate Plan" }) @Html.ValidationMessageFor(x => Model.SelectedRatePlan, "", new { @class = "text-danger" })

@Html.RadioButtonFor(x => Model.PriceOption, false, htmlAttributes: new { @id = "custom", @class = "col-md-1" }) @Html.Label("Enter custom price") @Html.TextBoxFor(x => Model.CustomRate, htmlAttributes: new { @id = "customrate", @class = "form-control", style = "width:100px;" }) @Html.ValidationMessageFor(x => Model.CustomRate, "", new { @class = "text-danger" })

Screenshot: What is rendered: div class="form-group">

Use price from current rate plan" select B70 B71 B90 B91 H70 H71 H90 H91 R70 R71 R90 R91

Enter custom price

I came across something about implementing a custom validator derived from ValidationAttribute, IClientModelValidator or is there easier method to achieve what I want? Thank you. JavaScript questions and answers, JavaScript questions pdf, JavaScript question bank, JavaScript questions and answers pdf, mcq on JavaScript pdf, JavaScript questions and solutions, JavaScript mcq Test , Interview JavaScript questions, JavaScript Questions for Interview, JavaScript MCQ (Multiple Choice Questions)

Answer 1

Expressive Annotations is a library I've used several times in production projects. Just specify the conditions on your viewmodel and you're good to go. So you would have something like: using ExpressiveAnnotations.Attributes;//reference at the top public class EnrollmentModel : BaseModel { ... public bool PriceOption { get; set; } [Required(ErrorMessage = "Please select a rate plan")] public string SelectedRatePlan { get; set; } public IEnumerable RatePlans { get; set; } [RequiredIf("PriceOption == true")] public string CustomRate { get; set; } ... }