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POSP 2007 - Webpart cannot be displayed
 

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  1. POSP 2007 - Webpart cannot be displayed
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    <p>Error: "A Webpart on this Page cannot be displayed or imported. The type could not be found or it is not registered as safe"</p> <p>Trying to find the details of this error in source-code but not quite sure where the exact problem is located.</p> <p>refer to <a href="https://stackoverflow.com/questions/7878798/sharepoint-2k7-custom-webpart-not-loading/7882656#7882656">This Thread</a> for previous fixes performed.</p> <p>Any pointers on a good location to start?</p> <p><strong>DLL:</strong> TCBOE.ChartPart.dll</p> <p><strong>Namespace:</strong> TCBOE.Chartpart</p> <p><strong>FeatureReceiver.vb</strong></p> <pre><code>Private Shared Sub AddOrRemoveChartHandlerToWebConfig(ByVal web As SPWebApplication, ByVal remove As Boolean) Dim asm As String = String.Format(CultureInfo.InvariantCulture, _ "System.Web.UI.DataVisualization.Charting.ChartHttpHandler, System.Web.DataVisualization, Version={0}, Culture=neutral, PublicKeyToken={1}", _ New Object() {"3.5.0.0", "31bf3856ad364e35"}) Dim modif As New SPWebConfigModification("add[@path='ChartImg.axd']", _ "configuration/system.web/httpHandlers") modif.Owner = "TCBOE.ChartPart" modif.Sequence = 0 modif.Type = SPWebConfigModification.SPWebConfigModificationType.EnsureChildNode modif.Value = String.Format(CultureInfo.InvariantCulture, _ "&lt;add verb=""{0}"" path=""{1}"" type=""{2}"" validate=""{3}"" /&gt;", _ New Object() {"GET,HEAD,POST", "ChartImg.axd", asm, "false"}) If (remove) Then web.WebConfigModifications.Remove(modif) Else web.WebConfigModifications.Add(modif) End If End Sub Private Shared Sub AddOrRemoveChartSettingsToWebConfig(ByVal web As SPWebApplication, ByVal remove As Boolean) Dim appSettings As New SPWebConfigModification("appSettings", "configuration") appSettings.Owner = "TCBOE.ChartPart" appSettings.Sequence = 0 web.WebConfigModifications.Add(appSettings) Dim keyVal As String = String.Format(CultureInfo.InvariantCulture, _ "storage={0};timeout={1};", _ New Object() {"memory", "20"}) Dim modif As New SPWebConfigModification("add[@key='ChartImageHandler']", "configuration/appSettings") modif.Owner = "TCBOE.ChartPart" modif.Sequence = 1 modif.Type = SPWebConfigModification.SPWebConfigModificationType.EnsureChildNode modif.Value = String.Format(CultureInfo.InvariantCulture, _ "&lt;add key=""{0}"" value=""{1}"" /&gt;", _ New Object() {"ChartImageHandler", keyVal}) If remove Then web.WebConfigModifications.Remove(modif) Else web.WebConfigModifications.Add(modif) End If End Sub &lt;SharePointPermission(System.Security.Permissions.SecurityAction.Demand, ObjectModel:=True)&gt; _ Public Overrides Sub FeatureActivated(ByVal properties As Microsoft.SharePoint.SPFeatureReceiverProperties) Dim site As SPSite = TryCast(properties.Feature.Parent, SPSite) Dim web As SPWebApplication = site.WebApplication AddOrRemoveChartSettingsToWebConfig(web, False) AddOrRemoveChartHandlerToWebConfig(web, False) web.Farm.Services.GetValue(Of SPWebService)().ApplyWebConfigModifications() web.Update() End Sub &lt;SharePointPermission(System.Security.Permissions.SecurityAction.Demand, ObjectModel:=True)&gt; _ Public Overrides Sub FeatureDeactivating(ByVal properties As Microsoft.SharePoint.SPFeatureReceiverProperties) Dim site As SPSite = TryCast(properties.Feature.Parent, SPSite) Dim web As SPWebApplication = site.WebApplication AddOrRemoveChartSettingsToWebConfig(web, True) AddOrRemoveChartHandlerToWebConfig(web, True) web.Farm.Services.GetValue(Of SPWebService)().ApplyWebConfigModifications() web.Update() End Sub </code></pre> <hr> <h2>Added: 10/26/2011 @ 11:36am</h2> <h2>Manifest.xml</h2> <p>(As created by WSPBuilder)</p> <pre><code>&lt;?xml version="1.0"?&gt; &lt;!-- Solution created by WSPBuilder. 10/26/2011 8:19:40 AM --&gt; &lt;Solution SolutionId="ee03c5c2-c9bd-4cfe-ac16-225f8e28072b" xmlns="http://schemas.microsoft.com/sharepoint/"&gt; &lt;Assemblies&gt; &lt;Assembly Location="cablib.dll" DeploymentTarget="GlobalAssemblyCache" /&gt; &lt;Assembly Location="TCBOE.ChartPart.dll" DeploymentTarget="GlobalAssemblyCache"&gt; &lt;SafeControls&gt; &lt;SafeControl Assembly="TCBOE.ChartPart, Version=3.5.1.0, Culture=neutral, PublicKeyToken=9f4da00116c38ec5" Namespace="TCBOE.ChartPart" TypeName="*" Safe="True" /&gt; &lt;/SafeControls&gt; &lt;/Assembly&gt; &lt;/Assemblies&gt; &lt;TemplateFiles&gt; &lt;TemplateFile Location="IMAGES\ChartPartWP\oscillator_16.gif" /&gt; &lt;TemplateFile Location="IMAGES\ChartPartWP\oscillator_32.gif" /&gt; &lt;/TemplateFiles&gt; &lt;FeatureManifests&gt; &lt;FeatureManifest Location="ChartPartWP\feature.xml" /&gt; &lt;/FeatureManifests&gt; &lt;/Solution&gt; </code></pre> <p>Are there any situations where a CAS policy would restrict a local-machine user account (used to run services) would cause this kind of behaviour?</p> <h2>Edit 11/3/2011:</h2> <p>Ok finally got a "Great Practices" install and it is stable and working. Got the original control i am customizing to load and working as it should.</p> <p>Went to go "install" my edited control and received this error response when trying to deploy the solution:</p> <pre><code>Feature '47d62f5e-b0e0-4f93-bcd1-081ca794527c' could not be installed because the loading of event receiver assembly "TCBOE.ChartPart, Verstion=3.5.1.0, Culture=neutral, PublicKeyToken=9f4da00116c38ec5" failed: System.IO.FileNotFoundException: Could not load file or assembly 'TCBOE.ChartPart, Culture=neutral, PublicKeyToken=9f4da00116c38ec5' or one of its dependencies. The system cannot find the file specified. File name: 'TCBOE.ChartPart, Culture=neutral, PublicKeyToken=9f4da00116c38ec5' at System.Reflection.Assembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, Assembly locationHint, StackCrawlMark&amp; stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection) at System.Reflection.Assembly.InternalLoad(AssemblyName assemblyRef, Evidence assemblySecurity, StackCrawlMark&amp; stackMark, Boolean forIntrospection) at System.Reflection.Assembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark&amp; stackMark, Boolean forIntrospection) at System.Reflection.Assembly.Load(String assemblyString) at Microsoft.SharePoint.Administration.SPFeatureDefinition.get_ReceiverObject() WRN: Assembly binding logging is turned OFF. To enable assembly bind failure logging, set the registry value [HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1. Note: There is some performance penalty associated with assembly bind failure logging. To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fusion!EnableLog]. </code></pre>
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