[NullReferenceException: 未将对象引用设置到对象的实例。]
Song.ServiceImpls.TeacherCom.TeacherSave(Teacher entity) in E:\ProgramCode\LearningSystem\Song.ServiceImpls\TeacherCom.cs:83
Song.Site.Teacher.Detail.InitPageTemplate(HttpContext context) in E:\ProgramCode\LearningSystem\Song.Site\Teacher\Detail.ashx.cs:26
Song.Site.BasePage.ProcessRequest(HttpContext context) in E:\ProgramCode\LearningSystem\Song.Site\BasePage.cs:294
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +542
System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step) +75
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +93
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