发生未处理的异常

wsd929

打开提示以下信息，是什么问题啊！



错误信息
-----------------------------------------------------
System.InvalidOperationException: Nullable object must have a value.
   at System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource)
   at System.Nullable`1.get_Value()
   at TOBA.Entity.QueryParam..(QueryResultItem ) in #Td:line 735
   at System.Linq.Enumerable.WhereSelectListIterator`2.MoveNext()
   at System.Linq.Enumerable.Min[TSource](IEnumerable`1 source)
   at TOBA.Entity.QueryParam.
(IEnumerable`1 ) in #Td:line 735
   at ..
(Boolean ) in #8:line 309
   at ..() in #8:line 274
   at ..(Object , EventArgs ) in #8:line 16777215
   at ..() in #Se:line 118
   at ..(Object ) in #Se:line 16777215


环境信息
-----------------------------------------------------
操作系统版本：Microsoft Windows NT 6.1.7601 Service Pack 1
程序运行目录：E:\12306订票助手.NET\12306订票助手.NET


模块信息
-----------------------------------------------------
[001]. mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 , C:\Windows\Microsoft.NET\Framework\v4.0.30319\mscorlib.dll
[002]. 12306订票助手, Version=2.5.8.855, Culture=neutral, PublicKeyToken=063375134da4cdc3 , E:\12306订票助手.NET\12306订票助手.NET\12306订票助手.exe
[003]. System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a , C:\windows\Microsoft.Net\assembly\GAC_MSIL\System.Drawing\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.Drawing.dll
[004]. System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 , C:\windows\Microsoft.Net\assembly\GAC_MSIL\System\v4.0_4.0.0.0__b77a5c561934e089\System.dll
[005]. System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 , C:\windows\Microsoft.Net\assembly\GAC_MSIL\System.Windows.Forms\v4.0_4.0.0.0__b77a5c561934e089\System.Windows.Forms.dll
[006]. System.Configuration, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a , C:\windows\Microsoft.Net\assembly\GAC_MSIL\System.Configuration\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.Configuration.dll
[007]. System.Xml, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 , C:\windows\Microsoft.Net\assembly\GAC_MSIL\System.Xml\v4.0_4.0.0.0__b77a5c561934e089\System.Xml.dll
[008]. System.Core, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 , C:\windows\Microsoft.Net\assembly\GAC_MSIL\System.Core\v4.0_4.0.0.0__b77a5c561934e089\System.Core.dll
[009]. {fffb3a52-7aeb-4070-bb26-b1c481b718f7}, Version=0.0.0.0, Culture=neutral, PublicKeyToken=3e56350693f7355e ,
[010]. Newtonsoft.Json, Version=4.5.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed , E:\12306订票助手.NET\12306订票助手.NET\Newtonsoft.Json.dll
[011]. System.Numerics, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 , C:\windows\Microsoft.Net\assembly\GAC_MSIL\System.Numerics\v4.0_4.0.0.0__b77a5c561934e089\System.Numerics.dll
[012]. System.ComponentModel.DataAnnotations, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 , C:\windows\Microsoft.Net\assembly\GAC_MSIL\System.ComponentModel.DataAnnotations\v4.0_4.0.0.0__31bf3856ad364e35\System.ComponentModel.DataAnnotations.dll
[013]. System.Runtime.Serialization, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 , C:\windows\Microsoft.Net\assembly\GAC_MSIL\System.Runtime.Serialization\v4.0_4.0.0.0__b77a5c561934e089\System.Runtime.Serialization.dll
[014]. System.Xml.Linq, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 , C:\windows\Microsoft.Net\assembly\GAC_MSIL\System.Xml.Linq\v4.0_4.0.0.0__b77a5c561934e089\System.Xml.Linq.dll
[015]. System.Data, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 , C:\windows\Microsoft.Net\assembly\GAC_32\System.Data\v4.0_4.0.0.0__b77a5c561934e089\System.Data.dll
[016]. BetterListViewExpress, Version=3.8.2.0, Culture=neutral, PublicKeyToken=e6c91a3add447be2 , E:\12306订票助手.NET\12306订票助手.NET\BetterListViewExpress.dll
[017]. SimpleUpdater, Version=2.3.4.5, Culture=neutral, PublicKeyToken=8bf54bd6729f490c , E:\12306订票助手.NET\12306订票助手.NET\SimpleUpdater.dll
[018]. rwwisn20, Version=2.3.4.5, Culture=neutral, PublicKeyToken=null ,
[019]. Accessibility, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a , C:\windows\Microsoft.Net\assembly\GAC_MSIL\Accessibility\v4.0_4.0.0.0__b03f5f7f11d50a3a\Accessibility.dll
[020]. System.Web, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a , C:\windows\Microsoft.Net\assembly\GAC_32\System.Web\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.Web.dll
[021]. ?, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null ,  不可用信息 (动态程序集)