asp.net-mvc - 集合的验证摘要

Question

编辑:将此问题升级到 MVC 2.0
使用 asp.net MVC 2.0 是否有一种现有的方法可以创建对包含集合的模型有意义的验证摘要？如果没有，我可以创建自己的验证摘要

示例模型:

public class GroupDetailsViewModel
{
    public string GroupName { get; set; }
    public int NumberOfPeople { get; set; }
    public List<Person> People{ get; set; }
}

public class Person
{
    [Required(ErrorMessage = "Please enter your Email Address")]
    [RegularExpression(@"^([a-zA-Z0-9_\-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([a-zA-Z0-9\-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$", ErrorMessage = "Please enter a valid Email Address")]
    public string EmailAddress { get; set; }

    [Required(ErrorMessage = "Please enter your Phone Number")]
    public string Phone { get; set; }

    [Required(ErrorMessage = "Please enter your First Name")]
    public string FirstName { get; set; }

    [Required(ErrorMessage = "Please enter your Last Name")]
    public string LastName { get; set; }
}

现有总结 <%=Html.ValidationSummary %>如果没有输入看起来像这样。

The following error(s) must be corrected before proceeding to the next step
* Please enter your Email Address
* Please enter your Phone Number
* Please enter your First Name
* Please enter your Last Name
* Please enter your Email Address
* Please enter your Phone Number
* Please enter your First Name
* Please enter your Last Name

该设计要求像这样插入标题:

The following error(s) must be corrected before proceeding to the next step
Person 1
* Please enter your Email Address
* Please enter your Phone Number
* Please enter your First Name
* Please enter your Last Name
Person 2
* Please enter your Email Address
* Please enter your Phone Number
* Please enter your First Name
* Please enter your Last Name

答案 基于 Pharcyde 的回答。

public static MvcHtmlString NestedValidationSummary(this HtmlHelper helper)
{
    if (helper.ViewData.ModelState.IsValid)
        return MvcHtmlString.Empty;

    // create datastructure to group error messages under a given key (blank key is for general errors)
    var errors = new Dictionary<string,List<string>>();
    foreach (KeyValuePair<string, ModelState> keyPair in helper.ViewData.ModelState)
    {
        foreach (ModelError error in keyPair.Value.Errors)
        {
            //determine the 'key' for the group in which this error belongs
            var key = keyPair.Key.Split(']')[0];
            if (key.Contains("People["))
                key = "Person " + key.Split('[')[1];
            else
                key = string.Empty;

            if(!errors.ContainsKey(key))
                errors.Add(key,new List<string>());
            //now add message using error.ErrorMessage property
            errors[key].Add(error.ErrorMessage);
        }
    }

    // generate the HTML
    var ul = new TagBuilder("ul");
    foreach (KeyValuePair<string, List<string>> errorPair in errors.OrderBy(p=>p.Key))
    {
        var li = new TagBuilder("li");
        if(!string.IsNullOrEmpty(errorPair.Key))
            li.InnerHtml += string.Format("<p class=\"no-bottom-margin\"><strong>{0}</strong></p>",errorPair.Key);
        var innerUl = new TagBuilder("ul");
        foreach (var message in errorPair.Value)
        {
            var innerLi = new TagBuilder("li");
            innerLi.InnerHtml = message;
            innerUl.InnerHtml += innerLi.ToString(TagRenderMode.Normal);
        }
        li.InnerHtml += innerUl.ToString(TagRenderMode.Normal);
        ul.InnerHtml += li.ToString(TagRenderMode.Normal);
    }

    return MvcHtmlString.Create(ul.ToString(TagRenderMode.Normal));
}

Answer 1

您将不得不扩展 HtmlHelper 方法并推出自己的方法。下面是一些对您需要组的情况很重要的代码:

//HtmlHelper being extended
if(helper.ViewData.ModelState.IsValid)
{
    foreach(KeyValuePair<string,ModelState> keyPair in helper.ViewData.ModelState)
    {     
        //add division for group by here using keyPair.Key property (would be named "Person" in your case).

        foreach(ModelError error in keyPair.Value.Errors)
        {
            //now add message using error.ErrorMessage property
        }
    }
}