Question

我有以下型号：

public class Model1
{
    [Required(ErrorMessage="E1")]
    public string Name { get; set; }
    [Required(ErrorMessage="E2")]
    [RegularExpression(".+\\@.+\\..+")]
    public string Email { get; set; }
    [Required(ErrorMessage="E3")]
    public bool WillAttend { get; set; }
}

控制器动作：

    public ActionResult Model1()
    {
        Model1 m = new Model1();
        return View(m);
    }

并查看：

@using (Html.BeginForm()) 
{
    @Html.AntiForgeryToken()

    <div class="form-horizontal">
        <h4>Model1</h4>
        <hr />
        @Html.ValidationSummary(true, "", new { @class = "text-danger" })
        <div class="form-group">
            @Html.LabelFor(model => model.Name, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.Name, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.Name, "", new { @class = "text-danger" })
            </div>
        </div>

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

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

        <div class="form-group">
            <div class="col-md-offset-2 col-md-10">
                <input type="submit" value="Create" class="btn btn-default" />
            </div>
        </div>
    </div>
}

问题是WillAttend属性需要验证器不起作用。即使在动作方法中，ModelState.IsValid也是如此。为什么以及如何做WillAttend是必需的？

Answer 1

目前，您的required-attribute只检查是否指定了值。由于布尔值为true或false，因此验证永远不会失败。

您可以将布尔值标记为可为空：

cmake -D CMAKE_BUILD_TYPE=RELEASE -D BUILD_PYTHON_SUPPORT=ON 
-D WITH_XINE=ON -D WITH_OPENGL=ON -D INSTALL_C_EXAMPLES=ON 
-D INSTALL_PYTHON_EXAMPLES=ON -D WITH_TBB=ON -D BUILD_EXAMPLES=ON
-D BUILD_NEW_PYTHON_SUPPORT=ON -D WITH_V4L=ON 
-D CMAKE_INSTALL_PREFIX=/home/username/main-env/opencv3.0 
-D WITH_GTK = ON -D MATLAB_ROOT_DIR=/home/MATLAB/R2015a ..

或者如果您试图强制他们选中此框，您可以尝试制作自定义验证器，例如in this link。

不要为了获得所需的验证器

1 个答案: