SP 2007 - 无法显示 Webpart [英] SP 2007 - Webpart cannot be displayed

问题描述

错误:无法显示或导入此页面上的 Webpart.找不到类型或未将其注册为安全"

Error: "A Webpart on this Page cannot be displayed or imported. The type could not be found or it is not registered as safe"

试图在源代码中找到此错误的详细信息，但不太确定确切的问题所在.

Trying to find the details of this error in source-code but not quite sure where the exact problem is located.

请参阅此主题了解之前执行的修复.

refer to This Thread for previous fixes performed.

有没有关于开始的好位置的提示?

Any pointers on a good location to start?

DLL: TCBOE.ChartPart.dll

DLL: TCBOE.ChartPart.dll

命名空间: TCBOE.Chartpart

Namespace: TCBOE.Chartpart

FeatureReceiver.vb

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, _
      "<add verb=""{0}"" path=""{1}"" type=""{2}"" validate=""{3}"" />", _
      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, _
      "<add key=""{0}"" value=""{1}"" />", _
      New Object() {"ChartImageHandler", keyVal})
    If remove Then
        web.WebConfigModifications.Remove(modif)
    Else
        web.WebConfigModifications.Add(modif)
    End If
End Sub
<SharePointPermission(System.Security.Permissions.SecurityAction.Demand, ObjectModel:=True)> _
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
<SharePointPermission(System.Security.Permissions.SecurityAction.Demand, ObjectModel:=True)> _
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

<小时>

已添加:2011 年 10 月 26 日上午 11:36

清单.xml

(由 WSPBuilder 创建)

---

Added: 10/26/2011 @ 11:36am

Manifest.xml

(As created by WSPBuilder)

<?xml version="1.0"?>
<!-- Solution created by WSPBuilder. 10/26/2011 8:19:40 AM  -->
<Solution SolutionId="ee03c5c2-c9bd-4cfe-ac16-225f8e28072b" xmlns="http://schemas.microsoft.com/sharepoint/">
  <Assemblies>
    <Assembly Location="cablib.dll" DeploymentTarget="GlobalAssemblyCache" />
    <Assembly Location="TCBOE.ChartPart.dll" DeploymentTarget="GlobalAssemblyCache">
      <SafeControls>
        <SafeControl Assembly="TCBOE.ChartPart, Version=3.5.1.0, Culture=neutral, PublicKeyToken=9f4da00116c38ec5" Namespace="TCBOE.ChartPart" TypeName="*" Safe="True" />
      </SafeControls>
    </Assembly>
  </Assemblies>
  <TemplateFiles>
    <TemplateFile Location="IMAGES\ChartPartWP\oscillator_16.gif" />
    <TemplateFile Location="IMAGES\ChartPartWP\oscillator_32.gif" />
  </TemplateFiles>
  <FeatureManifests>
    <FeatureManifest Location="ChartPartWP\feature.xml" />
  </FeatureManifests>
</Solution>

在任何情况下，CAS 策略会限制本地机器用户帐户(用于运行服务)会导致这种行为吗?

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?

好的，终于得到了伟大的实践"安装，它稳定且工作正常.获得了我正在自定义的原始控件以按预期加载和工作.

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.

去安装"我编辑过的控件并在尝试部署解决方案时收到此错误响应:

Went to go "install" my edited control and received this error response when trying to deploy the solution:

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& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection) 
   at System.Reflection.Assembly.InternalLoad(AssemblyName assemblyRef, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection) 
   at System.Reflection.Assembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& 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].

推荐答案

Web 部件应该在 web.config 的 SafeControls 中注册.这很简单.试试下面的链接:

The web part should be registered in web.config's SafeControls. It's very simple to do. Try the following link:

http://msdn.microsoft.com/en-us/library/ms581321(v=office.12).aspx

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