Question

我使用带有剃刀的asp.net MVC 3进行了网络。

在一个视图中，我遇到了复选框助手的奇怪错误。

这是剃刀代码：

@Html.CheckBox("rememberPassword", Model.RememberPassword, new { tabindex = "4", style = "width:15px" })

模型中的属性（我在Model构造函数中设置为true）：

public bool RememberPassword { get; set; }

记录错误：

2012-04-13 01:20:33.334 [13   ] Error - Reference: 0413-012033-334 - Global site error, page: /es/login
System.InvalidOperationException: The parameter conversion from type 'System.String' to type 'System.Boolean' failed. See the inner exception for more information. ---> System.FormatException: -1' is not a valid value for Boolean. ---> System.FormatException: String was not recognized as a valid Boolean.
   at System.Boolean.Parse(String value)
   at System.ComponentModel.BooleanConverter.ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, Object value)
   --- End of inner exception stack trace ---
   at System.ComponentModel.BooleanConverter.ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, Object value)
   at System.Web.Mvc.ValueProviderResult.ConvertSimpleType(CultureInfo culture, Object value, Type destinationType)
   --- End of inner exception stack trace ---
   at System.Web.Mvc.ValueProviderResult.ConvertSimpleType(CultureInfo culture, Object value, Type destinationType)
   at System.Web.Mvc.ValueProviderResult.UnwrapPossibleArrayType(CultureInfo culture, Object value, Type destinationType)
   at System.Web.Mvc.ValueProviderResult.ConvertTo(Type type, CultureInfo culture)
   at System.Web.Mvc.HtmlHelper.GetModelStateValue(String key, Type destinationType)
   at System.Web.Mvc.Html.InputExtensions.InputHelper(HtmlHelper htmlHelper, InputType inputType, ModelMetadata metadata, String name, Object value, Boolean useViewData, Boolean isChecked, Boolean setId, Boolean isExplicitValue, IDictionary`2 htmlAttributes)
   at System.Web.Mvc.Html.InputExtensions.CheckBoxHelper(HtmlHelper htmlHelper, ModelMetadata metadata, String name, Nullable`1 isChecked, IDictionary`2 htmlAttributes)
   at System.Web.Mvc.Html.InputExtensions.CheckBox(HtmlHelper htmlHelper, String name, Boolean isChecked, Object htmlAttributes)
   at ASP._Page_Views_Login_Index_cshtml.Execute() in d:\[...]\Views\Login\Index.cshtml:line 49
   at System.Web.WebPages.WebPageBase.ExecutePageHierarchy()
   at System.Web.Mvc.WebViewPage.ExecutePageHierarchy()
   at System.Web.WebPages.StartPage.RunPage()
   at System.Web.WebPages.StartPage.ExecutePageHierarchy()
   at System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage)
   at System.Web.Mvc.RazorView.RenderView(ViewContext viewContext, TextWriter writer, Object instance)
   at System.Web.Mvc.BuildManagerCompiledView.Render(ViewContext viewContext, TextWriter writer)
   at System.Web.Mvc.ViewResultBase.ExecuteResult(ControllerContext context)
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResult(ControllerContext controllerContext, ActionResult actionResult)
   at System.Web.Mvc.ControllerActionInvoker.<>c__DisplayClass1c.<InvokeActionResultWithFilters>b__19()
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func`1 continuation)
   at System.Web.Mvc.ControllerActionInvoker.<>c__DisplayClass1c.<>c__DisplayClass1e.<InvokeActionResultWithFilters>b__1b()
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultWithFilters(ControllerContext controllerContext, IList`1 filters, ActionResult actionResult)
   at System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName)

为什么会这样？

注意：

它不断变得奇怪和奇怪。奇怪的是，错误开始出现（某天在一个高效的网站上没有任何更新或发布）并没有停止。这是三天没有错误。但是，我仍然想知道原因。

Answer 1

它与创建复选框的方式无关。在一些非常奇怪的场景中（我完全忘记了），可以在没有此参数的情况下（从其他站点）提交此表单。在这种情况下，bool字段试图从字符串“-1”获得。

解决此问题的一种方法（that I have discovered to be a good practice）是避免模型中的“不可空”字段。

Answer 2

试试这个

Html.CheckBoxFor(model => model.RememberPassword , chkHtmlAttributes)

并将chkHtmlAttributes定义为这些

tabindex = "4", style = "width:15px"

Checkbox Helper：奇数字符串到bool转换错误

2 个答案: