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ارور Object reference not set to an instance of an object

ﺳﻪ شنبه, 24 بهمن 1396 11:11

ارور Object reference not set to an instance of an object

سلام روز بخیر.من فایلای وب سایتمو روی هاست آپلود کردم دیتابیس هم آپلود کردم.ولی وقتی میخوام با پستمن پارامتر post  و get  کنم این ارور رو میده.یه تابع تست نوشتم که فقط یه کلمه رو نشان بده که درست بود. این ارور به نحوه ارتباط با دیتابیس گیر میده.من از روش linq  استفاده کردم.لطفآ راهنمایی کنید باید چطوری این مشکلو حل کنم.خییبلییی ممنونم.عکس ها رو ارسال میکنم.

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ﺳﻪ شنبه, 24 بهمن 1396 11:56
متن ارور را قرار دهید
ﺳﻪ شنبه, 24 بهمن 1396 12:01

<!DOCTYPE html>
<html>
    <head>
        <title>Object reference not set to an instance of an object.</title>
        <meta name="viewport" content="width=device-width" />
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         @media screen and (max-width: 479px) {
          pre { width: 280px; }
         }
        </style>
    </head>
    <body bgcolor="white">
        <span>
            <H1>Server Error in '/' Application.
                <hr width=100% size=1 color=silver>
            </H1>
            <h2>
                <i>Object reference not set to an instance of an object.</i>
            </h2>
        </span>
        <font face="Arial, Helvetica, Geneva, SunSans-Regular, sans-serif ">
            <b> Description: </b>An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
            <br>
            <br>
            <b> Exception Details: </b>System.NullReferenceException: Object reference not set to an instance of an object.
            <br>
            <br>
            <b>Source Error:</b>
            <br>
            <br>
            <table width=100% bgcolor="#ffffcc">
                <tr>
                    <td>
                        <code>

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.</code>
                    </td>
                </tr>
            </table>
            <br>
            <b>Stack Trace:</b>
            <br>
            <br>
            <table width=100% bgcolor="#ffffcc">
                <tr>
                    <td>
                        <code>
                            <pre>

[NullReferenceException: Object reference not set to an instance of an object.]
   TripTime_Payment_Online.DataClasses_triptimeDataContext..ctor() in c:\Users\Administrator\Documents\Visual Studio 2013\Projects\TripTime_Payment_Online\TripTime_Payment_Online\DataClasses_triptime.designer.cs:41
   TripTime_Payment_Online.Controllers.HomeController.Payment() in c:\Users\Administrator\Documents\Visual Studio 2013\Projects\TripTime_Payment_Online\TripTime_Payment_Online\Controllers\HomeController.cs:38
   lambda_method(Closure , ControllerBase , Object[] ) +62
   System.Web.Mvc.ActionMethodDispatcher.Execute(ControllerBase controller, Object[] parameters) +14
   System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters) +157
   System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +27
   System.Web.Mvc.Async.AsyncControllerActionInvoker.&lt;BeginInvokeSynchronousActionMethod&gt;b__36(IAsyncResult asyncResult, ActionInvocation innerInvokeState) +22
   System.Web.Mvc.Async.WrappedAsyncResult`2.CallEndDelegate(IAsyncResult asyncResult) +29
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethod(IAsyncResult asyncResult) +32
   System.Web.Mvc.Async.AsyncInvocationWithFilters.&lt;InvokeActionMethodFilterAsynchronouslyRecursive&gt;b__3c() +50
   System.Web.Mvc.Async.&lt;&gt;c__DisplayClass45.&lt;InvokeActionMethodFilterAsynchronouslyRecursive&gt;b__3e() +225
   System.Web.Mvc.Async.&lt;&gt;c__DisplayClass30.&lt;BeginInvokeActionMethodWithFilters&gt;b__2f(IAsyncResult asyncResult) +10
   System.Web.Mvc.Async.WrappedAsyncResult`1.CallEndDelegate(IAsyncResult asyncResult) +10
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethodWithFilters(IAsyncResult asyncResult) +34
   System.Web.Mvc.Async.&lt;&gt;c__DisplayClass28.&lt;BeginInvokeAction&gt;b__19() +26
   System.Web.Mvc.Async.&lt;&gt;c__DisplayClass1e.&lt;BeginInvokeAction&gt;b__1b(IAsyncResult asyncResult) +100
   System.Web.Mvc.Async.WrappedAsyncResult`1.CallEndDelegate(IAsyncResult asyncResult) +10
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) +27
   System.Web.Mvc.Controller.&lt;BeginExecuteCore&gt;b__1d(IAsyncResult asyncResult, ExecuteCoreState innerState) +13
   System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +29
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49
   System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +36
   System.Web.Mvc.Controller.&lt;BeginExecute&gt;b__15(IAsyncResult asyncResult, Controller controller) +12
   System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +22
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49
   System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +26
   System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.EndExecute(IAsyncResult asyncResult) +10
   System.Web.Mvc.MvcHandler.&lt;BeginProcessRequest&gt;b__4(IAsyncResult asyncResult, ProcessRequestState innerState) +21
   System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +29
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49
   System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +28
   System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) +9
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +9644037
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean&amp; completedSynchronously) +155
</pre>
                        </code>
                    </td>
                </tr>
            </table>
            <br>
            <hr width=100% size=1 color=silver>
            <b>Version Information:</b>&nbsp;Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.6.1055.0
        </font>
    </body>
</html>
<!-- 
[NullReferenceException]: Object reference not set to an instance of an object.
   at TripTime_Payment_Online.DataClasses_triptimeDataContext..ctor() in c:\Users\Administrator\Documents\Visual Studio 2013\Projects\TripTime_Payment_Online\TripTime_Payment_Online\DataClasses_triptime.designer.cs:line 41
   at TripTime_Payment_Online.Controllers.HomeController.Payment() in c:\Users\Administrator\Documents\Visual Studio 2013\Projects\TripTime_Payment_Online\TripTime_Payment_Online\Controllers\HomeController.cs:line 38
   at lambda_method(Closure , ControllerBase , Object[] )
   at System.Web.Mvc.ActionMethodDispatcher.Execute(ControllerBase controller, Object[] parameters)
   at System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters)
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters)
   at System.Web.Mvc.Async.AsyncControllerActionInvoker.<BeginInvokeSynchronousActionMethod>b__36(IAsyncResult asyncResult, ActionInvocation innerInvokeState)
   at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResult`2.CallEndDelegate(IAsyncResult asyncResult)
   at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResultBase`1.End()
   at System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethod(IAsyncResult asyncResult)
   at System.Web.Mvc.Async.AsyncControllerActionInvoker.AsyncInvocationWithFilters.<InvokeActionMethodFilterAsynchronouslyRecursive>b__3c()
   at System.Web.Mvc.Async.AsyncControllerActionInvoker.AsyncInvocationWithFilters.<>c__DisplayClass45.<InvokeActionMethodFilterAsynchronouslyRecursive>b__3e()
   at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass30.<BeginInvokeActionMethodWithFilters>b__2f(IAsyncResult asyncResult)
   at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResult`1.CallEndDelegate(IAsyncResult asyncResult)
   at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResultBase`1.End()
   at System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethodWithFilters(IAsyncResult asyncResult)
   at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass1e.<>c__DisplayClass28.<BeginInvokeAction>b__19()
   at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass1e.<BeginInvokeAction>b__1b(IAsyncResult asyncResult)
   at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResult`1.CallEndDelegate(IAsyncResult asyncResult)
   at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResultBase`1.End()
   at System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult)
   at System.Web.Mvc.Controller.<BeginExecuteCore>b__1d(IAsyncResult asyncResult, ExecuteCoreState innerState)
   at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult)
   at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResultBase`1.End()
   at System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult)
   at System.Web.Mvc.Controller.<BeginExecute>b__15(IAsyncResult asyncResult, Controller controller)
   at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult)
   at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResultBase`1.End()
   at System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult)
   at System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.EndExecute(IAsyncResult asyncResult)
   at System.Web.Mvc.MvcHandler.<BeginProcessRequest>b__4(IAsyncResult asyncResult, ProcessRequestState innerState)
   at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult)
   at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResultBase`1.End()
   at System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult)
   at System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result)
   at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
-->
<!-- 
This error page might contain sensitive information because ASP.NET is configured to show verbose error messages using &lt;customErrors mode="Off"/&gt;. Consider using &lt;customErrors mode="On"/&gt; or &lt;customErrors mode="RemoteOnly"/&gt; in production environments.-->

ﺳﻪ شنبه, 24 بهمن 1396 12:45

لطف متن خطا را به شکل صحیح قرار بدید.

ﺳﻪ شنبه, 24 بهمن 1396 12:47

[NullReferenceException: Object reference not set to an instance of an object.]

عکسای کد های برنامم و ارور هم ضمیمه کردم

ﺳﻪ شنبه, 24 بهمن 1396 12:50

اینجوری نمیشه فهمید مشکل از کجاست ابتدا کد  قسمتی که این خطا نمایش داده شده را قرار دهید پس از آن stracktrace در فرمت کد قرار بدید. 

از فرمت ادیتور برای وارد کردن کد استفاده کنید.

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