Question

我使用以下代码创建了一个计时器作业：

namespace EmployeeDemo
{
    class DeleteEmployees : SPJobDefinition
    {
        public DeleteEmployees() : base() { }

        public DeleteEmployees(string jobName, SPWebApplication webapp)
            : base(jobName, webapp, null, SPJobLockType.ContentDatabase)
        {
            this.Title = "Delete Employees Timer Job";
        }

        public override void Execute(Guid targetInstanceId)
        {
            // Code
        }
    }
}

然后我创建了网站范围功能。在其事件接收器中，在停用时，我有以下代码：

const string timerJobName = "Delete Employees Timer Job";
public override void FeatureDeactivating(SPFeatureReceiverProperties properties)
{
    DeleteJob(properties.Feature.Parent as SPSite);
}
private void DeleteJob(SPSite site)
{
    foreach (SPJobDefinition job in site.WebApplication.JobDefinitions)
    {
        if (job.Name == timerJobName)
        {
            job.Delete();
        }
    }
}

但是它让我错误。从调试我明白错误是在行job.Delete();上抛出的。错误是：

对象引用未设置为对象的实例。

这让我感到困惑，因为语句job.Name执行完美，甚至让我得到了正确的计时器作业对象。但在尝试删除作业时，它会引发错误。

我发现this question与我的问题类似，但这些建议对我不起作用。从this discussion开始，我尝试在SPSecurity.RunWithElevatedPrivileges中编写删除代码，但它仍然不适用于我。

任何人都知道为什么会发生这种情况以及如何解决这个问题？

更新1

更多细节。

NullReferenceException未被用户代码
处理
对象引用未设置为对象的实例。

这里是堆栈跟踪

   at Microsoft.SharePoint.Administration.SPConfigurationDatabase.DeleteObject(Guid id)
   at Microsoft.SharePoint.Administration.SPConfigurationDatabase.Microsoft.SharePoint.Administration.ISPPersistedStoreProvider.DeleteObject(SPPersistedObject persistedObject)
   at Microsoft.SharePoint.Administration.SPPersistedObject.Delete()
   at Microsoft.SharePoint.Administration.SPJobDefinition.Delete()
   at EmployeeDemo.Features.DeleteEmpFeature.DeleteEmpFeatureEventReceiver.DeleteJob(SPSite site)
   at EmployeeDemo.Features.DeleteEmpFeature.DeleteEmpFeatureEventReceiver.FeatureDeactivating(SPFeatureReceiverProperties properties)
   at Microsoft.SharePoint.SPFeature.DoActivationCallout(Boolean fActivate, Boolean fForce)

Answer 1

要删除作业，请使用powershell：

$jobToDelete = Get-SPTimerJob -WebApplication "http://intranet" -Identity "YourJobName"
$jobToDelete.Delete()

然后运行：

iisreset /noforce

在配置数据库中，您需要授予这些权限以允许删除工作：

use [Sharepoint_Config]
GO
GRANT EXECUTE ON [dbo].[proc_putObjectTVP] TO [WSS_Content_Application_Pools]
GRANT EXECUTE ON [dbo].[proc_putObject] TO [WSS_Content_Application_Pools]
GRANT EXECUTE ON [dbo].[proc_putDependency] TO [WSS_Content_Application_Pools]
GRANT EXECUTE ON [dbo].[proc_putClass] TO [WSS_Content_Application_Pools]
GRANT EXECUTE ON [dbo].[proc_getNewObjects] TO [WSS_Content_Application_Pools]
GRANT EXECUTE ON [dbo].[proc_dropObject] TO [WSS_Content_Application_Pools]
GO

删除计时器作业时，它会抛出错误'对象引用未设置为对象的实例'

1 个答案: