DateFieldElement Null Exception

Posted by Community Admin on 08-Jul-2011 00:00

When installing a module, I am getting the following exception on a DateFieldElement:

System.ArgumentNullException was unhandled by user code
Message=Value cannot be null.
Parameter name: key
Source=mscorlib
ParamName=key
StackTrace:
       at System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add)
       at System.Collections.Generic.Dictionary`2.Add(TKey key, TValue value)
       at Telerik.Sitefinity.Configuration.ConfigElementDictionary`2.Add(TKey key, TElement element)
       at Telerik.Sitefinity.Configuration.ConfigElementDictionary`2.Add(TElement element)
       at Article.Web.UI.ArticlesDefinitions.CreateBackendSections(DetailFormViewElement detailView, FieldDisplayMode displayMode) in C:\Program Files (x86)\Telerik\Sitefinity 4.1\Projects\Article\Web\UI\ArticlesDefinitions.cs:line 1181
       at Article.Web.UI.ArticlesDefinitions.DefineArticlesBackendContentView(ConfigElement parent) in C:\Program Files (x86)\Telerik\Sitefinity 4.1\Projects\Article\Web\UI\ArticlesDefinitions.cs:line 903
       at Article.Configuration.ArticlesConfig.InitializeDefaultViews(ConfigElementDictionary`2 contentViewControls) in C:\Program Files (x86)\Telerik\Sitefinity 4.1\Projects\Article\Configuration\ArticlesConfig.cs:line 28
       at Telerik.Sitefinity.Modules.GenericContent.Configuration.ContentModuleConfigBase.OnPropertiesInitialized()
       at Telerik.Sitefinity.Configuration.ConfigElement.InitializeProperties()
       at Telerik.Sitefinity.Configuration.ConfigSection.InitializeProperties()
       at Telerik.Sitefinity.Configuration.ConfigElement.EnsurePropertiesInitialized()
       at Telerik.Sitefinity.Configuration.ConfigElement.get_Properties()
       at Telerik.Sitefinity.Configuration.ConfigElement.get_Item(String propertyName)
       at Telerik.Sitefinity.Modules.GenericContent.Configuration.ContentModuleConfigBase.get_ContentViewControls()
       at Telerik.Sitefinity.Services.ModuleBase.InstallContentViews(SiteInitializer initializer, Version upgradeFrom)
       at Telerik.Sitefinity.Services.ModuleBase.Install(SiteInitializer initializer, Version upgradeFrom)
       at Telerik.Sitefinity.Services.SystemManager.InitializeModule(ModuleSettings settings, InstallContext installContext, Boolean start)
InnerException:

The date Field element is defined like so:

var targetPublishDateField = new DateFieldElement(mainSection.Fields)

ID = "targetPublishDateField",

Title = "TargetPublishDate",

FieldType = typeof(Controls.Resources.DatePickerField),

DisplayMode = displayMode,

ResourceClassId = typeof(ArticlesResources).Name,

WrapperTag = HtmlTextWriterTag.Li,

CssClass = "sfFormSeparator",

Value = DateTime.UtcNow

;

mainSection.Fields.Add(targetPublishDateField);

The error is thrown when adding mainSection.Fields.Add(targetPublishDateField) line is hit. The only thing I can see is possibly because I am using a custom Field I built called DatePickerField in the FieldType. Thoughts? Other standard controls are not tossing the error so that is all I can think.

Posted by Community Admin on 08-Jul-2011 00:00

Ok, looks like I just needed to set the DataFieldName when creating the DateFieldElement.

var targetPublishDateField = new DateFieldElement(mainSection.Fields)

ID = "TargetPublishDate",

Title = "TargetPublishDate",

DataFieldName = "TargetPublishDate",

FieldType = typeof(Controls.Resources.DatePickerField),

DisplayMode = displayMode,

ResourceClassId = typeof(ArticlesResources).Name,

WrapperTag = HtmlTextWriterTag.Li,

CssClass = "sfFormSeparator",

Value = DateTime.UtcNow

;

mainSection.Fields.Add(targetPublishDateField)

On a different note, how do I mark my own posts as solved/closed since I resolved my own issue?

This thread is closed

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