ASP.Net MVC RC 2.0 Update from MVC 2.0 Beta Validation Check

Question

We recently updated our application and noticed that we were getting errors during the execution of all our Html.ValidationMessages and Html.ValidationMessageFor. There is an error: The specified key was not in the dictionary. We passed the expression modelName / and it worked fine until the update. I also checked the changes described in readme, but did not notice anything related to it.

Answer 1

After debugging the ASP.NET MVC source, I found the cause of this problem.

<% = Html.EnableClientSideValidation% > <% Html.BeginForm% > , , , , Html Id (formContext.FormId), . , , .

, , <% = Html.EnableClientSideValidation% > Html.BeginForm.

Answer 2

, , , asp.net mvc, ?

.

Line 185:                // rules will already have been written to the metadata object
Line 186:                fieldMetadata.ReplaceValidationMessageContents = (String.IsNullOrEmpty(validationMessage)); // only replace contents if no explicit message was specified
Line 187:                fieldMetadata.ValidationMessageId = builder.Attributes["id"];
Line 188:            }
Line 189:

.

[KeyNotFoundException: The given key was not present in the dictionary.]
   System.ThrowHelper.ThrowKeyNotFoundException() +29
   System.Collections.Generic.SortedDictionary`2.get_Item(TKey key) +5167507
   System.Web.Mvc.Html.ValidationExtensions.ValidationMessageHelper(HtmlHelper htmlHelper, ModelMetadata modelMetadata, String expression, String validationMessage, IDictionary`2 htmlAttributes) in D:\Projects\Practice\Mercurial\onlinerestaurant\trunk\ReferenceProjects\aspnetmvc2-rc-sources\src\SystemWebMvc\Mvc\Html\ValidationExtensions.cs:187
   System.Web.Mvc.Html.ValidationExtensions.ValidationMessageFor(HtmlHelper`1 htmlHelper, Expression`1 expression, String validationMessage, IDictionary`2 htmlAttributes) in D:\Projects\Practice\Mercurial\onlinerestaurant\trunk\ReferenceProjects\aspnetmvc2-rc-sources\src\SystemWebMvc\Mvc\Html\ValidationExtensions.cs:146
   System.Web.Mvc.Html.ValidationExtensions.ValidationMessageFor(HtmlHelper`1 htmlHelper, Expression`1 expression) in D:\Projects\Practice\Mercurial\onlinerestaurant\trunk\ReferenceProjects\aspnetmvc2-rc-sources\src\SystemWebMvc\Mvc\Html\ValidationExtensions.cs:131
   ASP.views_admin_createmenucategory_ascx.__Render__control1(HtmlTextWriter __w, Control parameterContainer) in d:\Projects\Practice\Mercurial\onlinerestaurant\trunk\OnlineRestaurant\Views\Admin\CreateMenuCategory.ascx:26
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +256
   System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +19
   System.Web.UI.Control.Render(HtmlTextWriter writer) +10
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +27
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +99
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +25
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +134
   System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +19
   System.Web.UI.Page.Render(HtmlTextWriter writer) +29
   System.Web.Mvc.ViewPage.Render(HtmlTextWriter writer) in D:\Projects\Practice\Mercurial\onlinerestaurant\trunk\ReferenceProjects\aspnetmvc2-rc-sources\src\SystemWebMvc\Mvc\ViewPage.cs:107
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +27
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +99
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +25
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1266