ModelState.AddModelError爲什麼沒有ModelState.AddModelSuccess？

ModelState是一個包含模型和模型構建驗證狀態的字典對象。ModelState.AddModelError爲什麼沒有ModelState.AddModelSuccess？

ModelState.AddModelError("MyKey", "My Error Message");

AddModelError()其將指定的錯誤消息發送到模型狀態字典的錯誤集合與所述指定鍵（的myKey）相連。

爲什麼沒有ModelState.AddModelSucces("MyKey", "My Error Message")？任何人都可以告訴如何在View中顯示成功消息。

ModelState.AddModelSucces("MyKey", "My Error Message") ???

來源

2013-11-28 sridharnetha

它是由設計，你只會增加錯誤消息到模型狀態。如果你想要成功的消息，只需使用另一種視圖模型或視圖包來實現。 – Spock

'ModelState.IsValid' – David

@David'ModelState.IsValid'表示布爾值，我想知道如何添加像ModelState.AddModelSuccess成功消息，不幸的是這種方法不可用？ – sridharnetha

您可以按照與Html.ValidationMessageFor相同的行創建HTML助手擴展方法。

下面是我快速打開的一個示例，但您可以進一步擴展它。看看http://aspnetwebstack.codeplex.com/SourceControl/latest#src/System.Web.Mvc/Html/ValidationExtensions.cs以獲得更多創意。

這會輸出一個span標籤，其中css類別爲field-validation-valid。

<span class="field-validation-valid">My success message</span>

查看

@Html.ValidationSuccessMessageFor(m => m.MyProperty, "My success message")

擴展方法

public static MvcHtmlString ValidationSuccessMessageFor<TModel, TProperty>(this HtmlHelper<TModel> htmlHelper, Expression<Func<TModel, TProperty>> expression) 
{ 
    return ValidationSuccessMessageFor(htmlHelper, expression, null, new RouteValueDictionary()); 
} 

public static MvcHtmlString ValidationSuccessMessageFor<TModel, TProperty>(this HtmlHelper<TModel> htmlHelper, Expression<Func<TModel, TProperty>> expression, string validationMessage) 
{ 
    return ValidationSuccessMessageFor(htmlHelper, expression, validationMessage, new RouteValueDictionary()); 
} 

public static MvcHtmlString ValidationSuccessMessageFor<TModel, TProperty>(this HtmlHelper<TModel> htmlHelper, Expression<Func<TModel, TProperty>> expression, string validationMessage, object htmlAttributes) 
{ 
    return ValidationSuccessMessageFor(htmlHelper, expression, validationMessage, HtmlHelper.AnonymousObjectToHtmlAttributes(htmlAttributes)); 
} 

public static MvcHtmlString ValidationSuccessMessageFor<TModel, TProperty>(this HtmlHelper<TModel> htmlHelper, Expression<Func<TModel, TProperty>> expression, string validationMessage, IDictionary<string, object> htmlAttributes) 
{ 
    return ValidationMessageHelper(htmlHelper, ModelMetadata.FromLambdaExpression(expression, htmlHelper.ViewData), ExpressionHelper.GetExpressionText(expression), validationMessage, htmlAttributes); 
} 

private static MvcHtmlString ValidationMessageHelper(this HtmlHelper htmlHelper, ModelMetadata modelMetadata, string expression, string validationMessage, IDictionary<string, object> htmlAttributes) 
{ 
    var modelName = htmlHelper.ViewContext.ViewData.TemplateInfo.GetFullHtmlFieldName(expression); 
     FormContext formContext = htmlHelper.ViewContext.ClientValidationEnabled ? htmlHelper.ViewContext.FormContext : null; 

    if (!htmlHelper.ViewData.ModelState.ContainsKey(modelName) && formContext == null) 
    { 
     return null; 
    } 

    var modelState = htmlHelper.ViewData.ModelState[modelName]; 

    if (modelState == null || (modelState != null && (modelState.Errors == null || modelState.Errors.Count > 0))) 
    { 
     return null; 
    } 

    var builder = new TagBuilder("span"); 
    builder.MergeAttributes(htmlAttributes); 
    builder.AddCssClass(HtmlHelper.ValidationMessageValidCssClassName); 

    if (!String.IsNullOrEmpty(validationMessage)) 
    { 
     builder.SetInnerText(validationMessage); 
    } 

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

來源

2013-11-28 09:22:02 David

ModelState.AddModelError爲什麼沒有ModelState.AddModelSuccess？

回答

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