Question

执行当前Web请求期间生成了未处理的异常的信息可以使用下面的异常堆栈跟踪信息确定有关异常原因。

[NullReferenceException: 未将对象引用设置到对象的实例。]
WebRegister.cWebRegister.IsToRegister() +76
WebRegister.login.preLogin.btnAction() +238
WebRegister.login.preLogin.Button1_Click(Object sender, EventArgs e) +29
System.Web.UI.WebControls.Button.OnClick(EventArgs e) +105
System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +107
System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +7
System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +11
System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +33
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +5102

怎么回事啊

Answer 1

你的代码里有对象为null了，导致了这个bug，
错误告诉你了，在
WebRegister.cWebRegister.IsToRegister这个方法里出的异常，在第76行，你看下那个代码吧

Answer 2

[NullReferenceException: 未将对象引用设置到对象的实例。]
Neton.EIP.Workflow.WorkflowPage.Page_Load(Object sender, EventArgs e) in E:\FinanceNew\NewDev\Finance5.0NewContract\FinanceWeb\Workflow.aspx.cs:77
System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +14
System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +35
System.Web.UI.Control.OnLoad(EventArgs e) +99
Neton.EIP.Workflow.WorkflowPage.OnLoad(EventArgs e) in E:\FinanceNew\NewDev\Finance5.0NewContract\FinanceWeb\Workflow.aspx.cs:113
System.Web.UI.Control.LoadRecursive() +50
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +627