javascript - 通过 jQuery 在 Html.ValidationMessageFor 中显示自定义错误

Question

我的 ASP.NET MVC 5 应用程序的 Razor View 使用两个复选框:

<div class="form-group">
            @Html.LabelFor(model => model.BoolField1, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                <div class="checkbox">
                    @Html.EditorFor(model => model.BoolField1, new { htmlAttributes = new { @class = "form-control", @id = "bool1" } })
                    @Html.ValidationMessageFor(model => model.BoolField1, "", new { @class = "text-danger" })
                </div>
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(model => model.BoolField2, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                <div class="checkbox">
                    @Html.EditorFor(model => model.BoolField2, new { htmlAttributes = new { @class = "form-control", @id = "bool2" } })
                    @Html.ValidationMessageFor(model => model.BoolField2, "", new { @class = "text-danger" })
                </div>
            </div>
        </div>

我正在尝试实现以下规则:除非 BoolField1 也为 true，否则 BoolField2 不能为 true。我的 jquery 代码:

function applyRule() {
        var bool1Status = document.getElementById('bool1').checked;
        var bool2Status = document.getElementById('bool2').checked;

        if (bool2Status == true && bool1Status == false) {
        // This is the sole error.
        // Generate a suitable error message and display (how?)

        }
    }

此代码生成的自定义错误必须显示到 Html.ValidationMessageFor 中。我怎样才能实现这个目标？

Answer 1

首先您需要更正 EditorFor () 的语法，它应该如下所示

 @Html.EditorFor(model => model.BoolField1, new { @class = "form-control", @id = "bool1" })

而不是

 @Html.EditorFor(model => model.BoolField1, new { htmlAttributes = new { @class = "form-control", @id = "bool1" } })

现在，在进行此更正后，您可以编写自定义 jQuery 逻辑来实现相同的目的。这是代码。

$(function () {
    $('#bool2').on('click', function (e) {
        //Get the state of 1st checkbox
        var isFirstCheck = $('#bool1').is(":checked");
        if (isFirstCheck==false) {
            //dispay message if you need. Below line of code will prevent user to select 2nd checkbox
            e.preventDefault();
        }
    })
});