c# – 为什么在SharePoint 2010迁移后此文件写入失败？

我将我的MOSS 2007应用程序(带有自定义批准工作流程)迁移到Sharepoint 2010.我有这个通用的代码来记录数据

private void WritetoLog(String logInfo)
{
    SPSecurity.RunWithElevatedPrivileges(delegate()
    {
        File.AppendAllText(LOG_FILE_PATH + string.Format("{0:" + LOG_FILE_FORMAT + "}",DateTime.Now) + ".log",logInfo);
    });
}

我已经完成了数据库分离升级,在以前的环境中有正在运行的工作流程(进行中状态),这应该在sharepoint 2010中继续.但不幸的是,这不会发生,我的复制器活动引发了错误.我在sharepoint日志中找到了这个

System.IO.IOException: The device is not ready.
at System.IO._Error.WinIOError(Int32 errorCode,String maybeFullP ath)
at System.IO.FileStream.Init(String p ath,FileMode mode,FileAccess access,Int32 rights,Boolean useRights,FileShare share,Int32 bufferSize,FileOptions options,Security atTRIBUTES sec attrs,String msgP ath,Boolean bFromProxy)
at System.IO.FileStream..ctor(String p ath,FileOptions options)
at System.IO.StreamWriter..ctor(String p ath,Boolean append,Encoding encoding,Int32 bufferSize)
at System.IO.StreamWriter..ctor(String p ath,Encoding encoding)
at System.IO.File.AppendAllText(String p ath,String contents,Encoding encoding)
at xyz.Utils.MailNotific ations.displayClass1._0()
at Microsoft.SharePoint.SPSecurity.displayClass4._2()
at Microsoft.SharePoint.Utilities.SecurityContext.RunAsProcess(CodetoRunElev ated secureCode)
at Microsoft.SharePoint.SPSecurity.RunWithElev atedPrivileges(WaitCallback secureCode,Object param)
at Microsoft.SharePoint.SPSecurity.RunWithElev atedPrivileges(CodetoRunElev ated secureCode)
at xyz.Utils.MailNotific ations.WritetoLog(String logInfo)
at xyz.Utils.MailNotific ations.SPNotific ation(SPWeb applic ation,String subject,String approver,String htmlBody)
at xyz.WF.Approval.ApprovalWorkFlow.logError_ExecuteCode(Object sender,EventArgs e)
at System.Workflow.ComponentModel.Activity.RaiseEvent(DependencyProperty dependencyEvent,Object sender,EventArgs e)
at System.Workflow.Activities.CodeActivity.Execute(ActivityExecutionContext executionContext)
at System.Workflow.ComponentModel.ActivityExecutor1.Execute(T activity,ActivityExecutionContext executionContext)
at System.Workflow.ComponentModel.ActivityExecutor1.Execute(Activity activity,ActivityExecutionContext executionContext)
at System.Workflow.ComponentModel.ActivityExecutorOper ation.Run(IWorkflowCoreRuntime workflowCoreRuntime)
at System.Workflow.Runtime.Scheduler.Run()

简而言之,这似乎是IO异常.我已共享日志文件夹位置,排除了文件访问权限,应用程序在启动新工作流时工作正常.

解决方法

什么是LOG_FILE_PATH和LOG_FILE_FORMAT？

如果其中任何一个为空或以其他方式无效,则可能导致IO异常.