Question

我正在创建一个表单，以便网站的成员可以更改其帐户的密码，并且我想显示一条消息，说明用户在填写字段时所犯的错误（例如密码太短，至少需要非字母数字字符等）。我想在字段名称旁边的同一页面中显示这些消息。这是我的代码：

@helper RenderForm()
{
  <form method="post">
    <p>Change your password below</p>

    <div><label for="currentPassword">Current Password</label>
    <input type="password" id="currentPassword" name="currentPassword"/></div>

    <div><label for="newPassword">New Password:</label>
    <input type="password" id="newPassword" name="newPassword"/></div>

    <div><label for="confirmPassword">Confirm New Password</label>
    <input type="password" id="confirmPassword" name="confirmPassword"/></div>

    <div><input type="submit" id="submit" name="submit" value="submit"/></div>
  </form>
}

@helper Message(string message)
{
  <p>@message</p>
}

<style type="text/css">
 p,label {color:black;}
</style>


@{
    if(!IsPost) {

         @RenderForm();

    }

    else {
        var account = Membership.GetUser();

        var currentPassword = HttpContext.Current.Request["currentPassword"];

        if(Membership.ValidateUser(account.UserName, currentPassword)){
            var newPassword = HttpContext.Current.Request["newPassword"];
            var confirmPassword = HttpContext.Current.Request["currentPassword"];

            if(check(newPassword, confirmPassword)){
                account.ChangePassword(account.ResetPassword(), newPassword);
            }

        }
        else {
            @Message("The password provided didn't match with the database.");
        }   
    }
}

@functions{

    List<string> check(string newPassword, string confirmPassword)
    {
        //just a place holder
        return false;
    }
}

我已经尝试在发现错误时添加要填充的List，并且当重新加载表单时，将显示该消息，但RenderForm（）函数找不到对List的任何引用。如何显示这些消息？

Answer 1

您应该使用Web页面框架附带的内置验证。我有一篇文章解释了如何使用它：http://www.mikesdotnetting.com/Article/191/Validation-In-Razor-Web-Pages-2

'全球'变量Razor

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