给定以下 HTML
<form class="form-horizontal"
asp-controller="Installation"
asp-action="CreateUser"
method="post">
<fieldset>
<!-- Form Name -->
<legend>Account Creation</legend>
<!-- Username input-->
<div class="form-group">
<label class="col-md-4 control-label" for="userName">Username</label>
<div class="col-md-4">
<input id="UserName" name="UserName" asp-for="UserName" type="text" placeholder="Username" class="form-control input-md" required="">
<span id="usernameTip" class="help-block hidden">Enter a unique Username</span>
<span class="has-error" asp-validation-for="UserName"></span>
</div>
</div>
<!-- Email input-->
<div class="form-group">
<label class="col-md-4 control-label" for="email">E-mail</label>
<div class="col-md-4">
<input id="email"
name="email"
type="text"
placeholder="jane@doe.com"
class="form-control input-md"
required=""
asp-for="Email">
<span class="help-block">Enter your e-mail address</span>
</div>
</div>
<!-- Password input-->
<div class="form-group">
<label class="col-md-4 control-label" for="password">Password</label>
<div class="col-md-4">
<input id="password"
name="password"
type="password"
placeholder="password"
class="form-control input-md"
required=""
asp-for="Password">
<span class="help-block">Enter a password that is at least 8 characters, fewer than 30</span>
</div>
</div>
<!-- Password input-->
<div class="form-group">
<label class="col-md-4 control-label" for="confirmPassword">Confirm Password</label>
<div class="col-md-4">
<input id="confirmPassword"
name="confirmPassword"
type="password"
placeholder="password"
class="form-control input-md"
required=""
asp-for="PasswordConfirmation">
<span class="help-block">Re-enter your password</span>
</div>
</div>
<!-- Submit -->
<div class="form-group">
<label class="col-md-4 control-label"
for="createAccount"></label>
<div class="col-md-4">
<button id="createAccount" type="submit" name="createAccount" class="btn btn-primary">Create Account</button>
</div>
</div>
</fieldset>
</form>
当 asp-validation-for
范围包含验证错误时,我想隐藏/显示 usernameTip
范围,以及我想要的任何其他范围当存在相邻的 asp-validation-for
范围时用作提示。
阅读this post我可以获得显示/隐藏跨度所需的 JavaScript。我唯一无法弄清楚的是, View 是否确实了解庄园中的验证错误,让我有条件地隐藏/显示 usernameTip
span(如果存在错误)。
有人知道我需要做什么才能根据模型上的数据注释错误切换可见性吗?
在 Chrome 中查看时,asp-validation-for
span 在编译时会变成这样:
<span class="has-error field-validation-error" data-valmsg-for="UserName" data-valmsg-replace="true">Usernames must be between 2 and 50 characters</span>
编辑
当验证失败时,末尾会附加一个==$0
。
用户名必须介于 2 到 50 个字符之间 == $0
当验证失败时,我没有看到任何类被添加或从范围中删除。
编辑2
我使用已接受的答案得到了这个工作。不过,对于那些展望 future 的人,您可以在 View 中使用 MVC 的 ViewData
属性来确定是否存在错误。
<div class="col-md-4">
<input id="UserName" name="UserName" asp-for="UserName" type="text" placeholder="Username" class="form-control input-md" required="">
@if (ViewData.ModelState[nameof(AccountCreationViewModel.UserName)] == null || ViewData.ModelState[nameof(AccountCreationViewModel.UserName)].Errors.Count == 0)
{
<span class="help-block">Enter a unique Username</span>
}
else
{
<span class="label label-danger" role="alert" asp-validation-for="UserName"></span>
}
</div>
最佳答案
<div class="col-md-4">
<input id="UserName" name="UserName" asp-for="UserName" type="text" placeholder="Username" class="form-control input-md" required="">
<span id="usernameTip" class="help-block hidden">Enter a unique Username</span>
<span id="error" class="has-error" asp-validation-for="UserName"></span>
</div>
<script>
if( $("#error").text().length>0){
//show usernameTip
}
</script>
关于javascript - 根据验证结果切换元素可见性,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/38177300/