“/”应用程序中的服务器错误。

未将对象引用设置到对象的实例。

说明: 执行当前 Web 请求期间,出现未经处理的异常。请检查堆栈跟踪信息,以了解有关该错误以及代码中导致错误的出处的详细信息。

异常详细信息: System.NullReferenceException: 未将对象引用设置到对象的实例。

源错误:

行 21:             <span class="btn btn-danger">字母检索</span>
行 22:             <% 
行 23:              var stringAbc = listModel.SingerList.Where(p=>p.Abcd!=string.Empty).OrderBy(p => p.Abcd).Select(p =>p.Abcd.ToUpper()).Distinct().ToArray();
行 24:                 foreach (var m in stringAbc)
行 25:                 {

源文件: d:\wwwroot\25xz\aspx\list.aspx    行: 23

堆栈跟踪:

[NullReferenceException: 未将对象引用设置到对象的实例。]
   ASP.aspx_list_aspx.<__RenderContent2>b__2(NClass p) in d:\wwwroot\25xz\aspx\list.aspx:23
   System.Linq.WhereSelectEnumerableIterator`2.MoveNext() +164
   System.Linq.<DistinctIterator>d__63`1.MoveNext() +220
   System.Linq.Buffer`1..ctor(IEnumerable`1 source) +120
   System.Linq.Enumerable.ToArray(IEnumerable`1 source) +77
   ASP.aspx_list_aspx.__RenderContent2(HtmlTextWriter __w, Control parameterContainer) in d:\wwwroot\25xz\aspx\list.aspx:23
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +268
   System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +13
   System.Web.UI.Control.Render(HtmlTextWriter writer) +12
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +66
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +100
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +25
   ASP.aspx_default_master.__Render__control1(HtmlTextWriter __w, Control parameterContainer) in d:\wwwroot\25xz\aspx\Default.Master:92
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +268
   System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +13
   System.Web.UI.Control.Render(HtmlTextWriter writer) +12
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +66
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +100
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +25
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +128
   System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +13
   System.Web.UI.Page.Render(HtmlTextWriter writer) +29
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +66
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +100
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +25
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1303


版本信息: Microsoft .NET Framework 版本:4.0.30319; ASP.NET 版本:4.6.1055.0

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