由于客户端计时,SqlServerStorage.LoadInBatch()函数中的MiniProfiler NullReferenceException

Question

当我点击个人资料的分享链接时,我收到以下异常.我正在使用NuGet的最新版本,2.0.1.

例外情况:

System.NullReferenceException: Object reference not set to an instance of an object.
   at StackExchange.Profiling.Storage.SqlServerStorage.LoadInBatch(DbConnection conn, Object idParameter) in C:\Users\sam\Desktop\MiniProfiler\StackExchange.Profiling\Storage\SqlServerStorage.cs:line 348    
   at StackExchange.Profiling.Storage.SqlServerStorage.Load(Guid id) in C:\Users\sam\Desktop\MiniProfiler\StackExchange.Profiling\Storage\SqlServerStorage.cs:line 297 
   at StackExchange.Profiling.UI.MiniProfilerHandler.Results(HttpContext context) in C:\Users\sam\Desktop\MiniProfiler\StackExchange.Profiling\UI\MiniProfilerHandler.cs:line 314 
   at StackExchange.Profiling.UI.MiniProfilerHandler.ProcessRequest(HttpContext context) in C:\Users\sam\Desktop\MiniProfiler\StackExchange.Profiling\UI\MiniProfilerHandler.cs:line 188 
   at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() 
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

代码:

我发现,我认为是在代码中的空引用的来源在这里:

ClientTimings clientTimings = null;
if (clientTimingList.Count > 0)
{
    clientTimings.Timings = clientTimingList;
}

我错过了什么,或者当有条目时总是会抛出异常clientTimingList？

解决方法:

• 我想也许如果我禁用批处理,我不会运行LoadInBatch函数,但LoadIndividually有同样的问题.

• 我找了一种方法来禁用客户端计时,但找不到它的设置.

• 也许我可以在数据库中设置一个触发器来删除行,但这似乎有点极端.

如果我有时间,我会得到代码并提交拉取请求.我想先确保我没有遗漏任何明显的东西.

Answer 1

看起来这是一个错误。我在 github 上添加了一张票证和一个拉取请求来修复它： https: //github.com/SamSaffron/MiniProfiler/pull/40

新代码如下所示：

if (clientTimingList.Count > 0)
{
    clientTimings = new ClientTimings();
    clientTimings.Timings = clientTimingList;
}