MVC3: make checkbox required via jQuery validate?

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I want my \"Agree To Terms\" checkbox to be mandatory using jQuery validate, in an MVC3 project. I currently get server/client DRY/SPOT validation from \"MS data annotation

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刺人心

2020-12-04 09:00

<asp:Content ID="Content1" ContentPlaceHolderID="MainContentPlaceHolder" runat="server">
    <h2>
        Save New Contact</h2>
    <%using (Html.BeginForm("SaveContact", "Contact", FormMethod.Post, new { id = "UserImportTypeForm", @autocomplete = "off" })) %>
    <%{ %>
    <table style="height: 100px;">
        <tr>
            <td>
                Import Type :
            </td>

        </tr>
        <tr>
            <td>
                Is Verified
            </td>
            <td>
                <%-- <%=Html.TextBox("UserContactModel.IsVerified", new SelectList(Model.IsVerified, "IsVerified"), new { })%>>--%>
                <%-- <input type="text" name="txtIsVerified" id="txtIsVerified" />--%>
                <%-- <%= Html.TextBox("txtIsVerified")%>--%>
                <%=Html.CheckBox("SelectedUserContact.IsVerified", Convert.ToBoolean(Model.SelectedUserContact.IsVerified) )%>
                <%=Html.ValidationSummary("txtIsVerified", "*")%>
            </td>
        </tr>
        <tr>
            <td>
                First Name
            </td>
            <td>
                <%--<input type="text" name="txtFirstName" id="txtFirstName" />--%>
                <%=Html.TextBox ("SelectedUserContact.FirstName", Model.SelectedUserContact.FirstName )%>
                <%-- <%=Html.ValidationSummary("FirstName", "*")%>--%>
            </td>
        </tr>
        <tr>
            <td>
                Last Name
            </td>
            <td>
                <%--<input type="text" name="txtLastName" id="txtLastName" />--%>
                <%=Html.TextBox("SelectedUserContact.LastName", Model.SelectedUserContact.LastName)%>
                <%=Html.ValidationSummary("LastName", "*")%>
            </td>
        </tr>
        <tr>
            <td>
                Contact ID
            </td>
            <td>
                <%=Html.TextBox("SelectedUserContact.ContactID",Model.SelectedUserContact.ContactID) %>
                <%=Html.ValidationSummary("ContactID","*") %>
            </td>
        </tr>
        <tr>
            <td align="right">
                <input type="submit" value="Save" name="btnSave" id="btnSave" />
            </td>
            <td>
                <input type="button" value="Cancel" name="btnCancel" id="btnCancel" />
            </td>
        </tr>
    </table>
    <%} %>
    <script src="../../Scripts/jquery.validate.js" type="text/javascript"></script>
    <script language="javascript" type="text/javascript">

        $("#UserImportTypeForm").validate({
            rules:
    {

        "SelectedUserContact.FirstName": { required: true },
        "SelectedUserContact.LastName": { required: true },
        "SelectedUserContact.ContactID": {required:true}
    },
            messages:
    {

        "SelectedUserContact.FirstName": { required: "*" },
        "SelectedUserContact.LastName": { required: "*" },
        "SelectedUserContact.ContactID": { required: "*" },

    }
        });



    </script>
</asp:Content>

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旧时难觅i

2020-12-04 09:14

I've summarized here the correctly-working source code, which resulted from applying the accepted answer. Hope you find it useful.

RequiredCheckbox.aspx

<%@ Page Language="C#" Inherits="System.Web.Mvc.ViewPage<RegistrationViewModel>" %>

<!DOCTYPE html>
<html>
<head runat="server">
    <title>RequiredCheckbox</title>
    <script src="//ajax.googleapis.com/ajax/libs/jquery/1.4.4/jquery.min.js" type="text/javascript"></script>
    <script src="//ajax.microsoft.com/ajax/jQuery.Validate/1.7/jQuery.Validate.js" type="text/javascript"></script>
    <script src="//ajax.aspnetcdn.com/ajax/mvc/3.0/jquery.validate.unobtrusive.js" type="text/javascript"></script>
    <script type="text/javascript" language="javascript">
        $.validator.unobtrusive.adapters.addBool("mandatory", "required");
    </script>
</head>
<body>
    <div>
        <% 
        // These directives can occur in web.config instead
        Html.EnableUnobtrusiveJavaScript();
        Html.EnableClientValidation();
        using (Html.BeginForm())
        { %>
            <%: Html.CheckBoxFor(model => model.IsTermsAccepted)%>
            <%: Html.ValidationMessageFor(model => model.IsTermsAccepted)%>

            <%: Html.TextBoxFor(model => model.ContactName)%>
            <%: Html.ValidationMessageFor(model => model.ContactName)%>
            <button type="submit">Submit</button>
        <% } %>
    </div>
</body>
</html>

RegistrationViewModel.cs

using System;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;

public class RegistrationViewModel {
    [Mandatory (ErrorMessage="You must agree to the Terms to register.")]
    [DisplayName("Terms Accepted")]
    public bool isTermsAccepted { get; set; }

    [Required]
    [DisplayName("Contact Name")]
    public string contactName { get; set; }
}

MandatoryAttribute.cs

using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Web.Mvc;

public class MandatoryAttribute : ValidationAttribute, IClientValidatable
{
    public override bool IsValid(object value)
    {
        return (!(value is bool) || (bool)value);
    }
    public IEnumerable<ModelClientValidationRule> GetClientValidationRules(ModelMetadata metadata, ControllerContext context)
    {
        ModelClientValidationRule rule = new ModelClientValidationRule();
        rule.ErrorMessage = FormatErrorMessage(metadata.GetDisplayName());
        rule.ValidationType = "mandatory";
        yield return rule;
    }
}

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既然无缘

2020-12-04 09:16

Just change your javascript to this:

(function ($) {
    // http://itmeze.com/2010/12/checkbox-has-to-be-checked-with-unobtrusive-jquery-validation-and-asp-net-mvc-3/
    $.validator.unobtrusive.adapters.add("mandatory", function (options) {
        options.rules["required"] = true;
        if (options.message) {
            options.messages["required"] = options.message;
        }                
    });            
} (jQuery));

You do not actually need to write your own adapter though and can just use:

(function ($) {
    $.validator.unobtrusive.adapters.addBool("mandatory", "required");
} (jQuery));

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