如何解决mvc3 ValidationSummary排除属性错误IValidatableObject
|| 我的模型（类A）具有类型B的属性（称为b），实现了IValidatableObject
IValidatableObject
ValidationResult
IValidatableObject
解决方法
我认为这很简单，让我举例说明。
首先让我提出您面临的问题，然后我将说明如何解决。
1）声明我的模型。
public class ClassA
{
[Required]
public string Name { get; set; }
public ClassB CBProp { get; set; }
}
public class ClassB:IValidatableObject
{
[Required]
public string MyProperty { get; set; }
public IEnumerable<ValidationResult> Validate(ValidationContext validationContext)
{
if (!string.IsNullOrWhiteSpace(MyProperty) && MyProperty.Length > 10)
yield return new ValidationResult(\"MaxLength reached\");
}
}
public class HomeController : Controller
{
[HttpGet]
public ActionResult Test()
{
ClassA ca = new ClassA();
return View(ca);
}
[HttpPost]
public ActionResult Test(ClassA ca)
{
return View(ca);
}
}
@using (Html.BeginForm()) {
@Html.ValidationSummary(true)
<fieldset>
<legend>ClassA</legend>
<div class=\"editor-label\">
@Html.LabelFor(model => model.Name)
</div>
<div class=\"editor-field\">
@Html.EditorFor(model => model.Name)
@Html.ValidationMessageFor(model => model.Name)
</div>
@Html.EditorFor(m => m.CBProp,\"TestB\")
<p>
<input type=\"submit\" value=\"Create\" />
</p>
</fieldset>
}
<div class=\"editor-label\">
@Html.LabelFor(model => model.MyProperty)
</div>
<div class=\"editor-field\">
@Html.EditorFor(model => model.MyProperty)
@Html.ValidationMessageFor(model => model.MyProperty)
</div>
@Html.ValidationSummary(true) /// true,will excludePropertyErrors
@Html.ValidationSummary()
@Html.ValidationSummary(true)
@Html.ValidationMessageFor(model => model.MyProperty)
public IEnumerable<ValidationResult> Validate(ValidationContext validationContext)
{
if (!string.IsNullOrWhiteSpace(MyProperty) && MyProperty.Length > 10)
yield return new ValidationResult(\"MaxLength reached\",new List<string> { \"MyProperty\" });
}
Validationsummary
Name
foreach
[Promote(\"prop1.SubProp1 Prop2\")]
public ActionResult MyMethod( ...
public class PromoteAttribute : ActionFilterAttribute
{
string[] expressions;
public PromoteAttribute(string toPromote)
{
expressions = toPromote.Split(\' \');
}
public override void OnActionExecuted(ActionExecutedContext filterContext)
{
ModelStateDictionary modelState=filterContext.Controller.ViewData.ModelState;
foreach(var x in expressions)
{
if (modelState.ContainsKey(x))
{
var entry = modelState[x];
if (entry.Errors.Count == 0) continue;
foreach (var error in entry.Errors) modelState.AddModelError(\"\",error.ErrorMessage);
}
}
}
}
@Html.ValidationSummary(new [] { \"PropertyName\" })
@Html.ValidationSummary(new [] { \"ArrayName[]\" })
@Html.ValidationSummary(new [] { \"ArrayName[]\",\"PropertyName\" })
public static MvcHtmlString ValidationSummary(this HtmlHelper htmlHelper,string[] includePropertyErrors)
{
return ValidationSummary(htmlHelper,includePropertyErrors,null,null);
}
public static MvcHtmlString ValidationSummary(this HtmlHelper htmlHelper,string[] includePropertyErrors,string message)
{
return ValidationSummary(htmlHelper,message,string message,IDictionary<string,object> htmlAttributes)
{
if (htmlHelper == null)
{
throw new ArgumentNullException(\"htmlHelper\");
}
FormContext formContext = htmlHelper.ViewContext.ClientValidationEnabled ? htmlHelper.ViewContext.FormContext : null;
if (htmlHelper.ViewData.ModelState.IsValid)
{
if (formContext == null)
{ // No client side validation
return null;
}
// TODO: This isn\'t really about unobtrusive; can we fix up non-unobtrusive to get rid of this,too?
if (htmlHelper.ViewContext.UnobtrusiveJavaScriptEnabled)
{ // No client-side updates
return null;
}
}
string messageSpan;
if (!string.IsNullOrEmpty(message))
{
TagBuilder spanTag = new TagBuilder(\"span\");
spanTag.SetInnerText(message);
messageSpan = spanTag.ToString(TagRenderMode.Normal) + Environment.NewLine;
}
else
{
messageSpan = null;
}
StringBuilder htmlSummary = new StringBuilder();
TagBuilder unorderedList = new TagBuilder(\"ul\");
IEnumerable<ModelState> modelStates = from ms in htmlHelper.ViewData.ModelState
where ms.Key == htmlHelper.ViewData.TemplateInfo.HtmlFieldPrefix ||
includePropertyErrors.Any(property =>
{
string prefixedProperty = string.IsNullOrEmpty(htmlHelper.ViewData.TemplateInfo.HtmlFieldPrefix) ? property : htmlHelper.ViewData.TemplateInfo.HtmlFieldPrefix + \".\" + property;
if (property.EndsWith(\"[]\"))
{
return prefixedProperty.Substring(0,property.Length - 2) == Regex.Replace(ms.Key,@\"\\[[^\\]]+\\]\",string.Empty);
}
else
{
return property == ms.Key;
}
})
select ms.Value;
if (modelStates != null)
{
foreach (ModelState modelState in modelStates)
{
foreach (ModelError modelError in modelState.Errors)
{
string errorText = GetUserErrorMessageOrDefault(htmlHelper.ViewContext.HttpContext,modelError);
if (!String.IsNullOrEmpty(errorText))
{
TagBuilder listItem = new TagBuilder(\"li\");
listItem.SetInnerText(errorText);
htmlSummary.AppendLine(listItem.ToString(TagRenderMode.Normal));
}
}
}
}
if (htmlSummary.Length == 0)
{
htmlSummary.AppendLine(@\"<li style=\"\"display:none\"\"></li>\");
}
unorderedList.InnerHtml = htmlSummary.ToString();
TagBuilder divBuilder = new TagBuilder(\"div\");
divBuilder.MergeAttributes(htmlAttributes);
divBuilder.AddCssClass((htmlHelper.ViewData.ModelState.IsValid) ? HtmlHelper.ValidationSummaryValidCssClassName : HtmlHelper.ValidationSummaryCssClassName);
divBuilder.InnerHtml = messageSpan + unorderedList.ToString(TagRenderMode.Normal);
if (formContext != null)
{
if (!htmlHelper.ViewContext.UnobtrusiveJavaScriptEnabled)
{
// client val summaries need an ID
divBuilder.GenerateId(\"validationSummary\");
formContext.ValidationSummaryId = divBuilder.Attributes[\"id\"];
formContext.ReplaceValidationSummary = false;
}
}
return new MvcHtmlString(divBuilder.ToString(TagRenderMode.Normal));
}
private static string GetUserErrorMessageOrDefault(HttpContextBase httpContext,ModelError error)
{
return string.IsNullOrEmpty(error.ErrorMessage) ? null : error.ErrorMessage;
}
public class A
{
public B ModelB { get; set; }
}
public class B : IValidatableObject
{
public string Name { get; set; }
public IEnumerable<ValidationResult> Validate(ValidationContext validationContext)
{
List<ValidationResult> errors = new List<ValidationResult>();
if (string.IsNullOrEmpty(Name)) {
errors.Add(new ValidationResult(\"Please enter your name\"));
}
return errors;
}
}
@model A
@Html.ValidationSummary(true)
@using (Html.BeginForm())
{
@Html.EditorFor(model => model.ModelB.Name)
<input type=\"submit\" value=\"submit\" />
}
<input class=\"text-box single-line\" id=\"ModelB_Name\" name=\"ModelB.Name\" type=\"text\" value=\"\" />
[HttpPost]
public ActionResult Index(A model)
{
if (ModelState.IsValid)
{
return RedirectToAction(\"NextAction\");
}
return View();
}
A
DefaultModelBinder
ModelB.Name
DefaultModelBinder
A
ValidationSummary
B
EditorTemplate
EditorTemplates
B.cshtml
@model MvcApplication14.Models.B
@Html.EditorFor(m => m.Name)
EditorFor
@Html.EditorFor(model => model.ModelB,\"\")
<input class=\"text-box single-line\" id=\"Name\" name=\"Name\" type=\"text\" value=\"\" />
ModelB
A
[HttpPost]
public ActionResult Index(A modelA,B modelB)
{
modelA.ModelB = modelB;
if (ModelState.IsValid)
{
return RedirectToAction(\"NextAction\");
}
return View();
}
@ValidationMessage()
modelB
modelA
modelB
modelA
Name
DefaultModelBinder
A
Name
@Html.EditorFor(model => model.Name,\"modelA.Name\")
ViewData.TemplateInfo.HtmlFieldPrefix
ModelState.AddModelError(\"\",\"This is a summary level error text for the model\");
ModelState.AddModelError(\"b\",\"This is a \'summary\' error for the property named b\");
ViewData.TemplateInfo.HtmlFieldPrefix
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