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VisualStudio 오류를 확인하던 중 ASCII 값에 대한 내용을 기록으로 남깁니다. ^^

System.NullReferenceException: Object reference not set to an instance of an object.
   at Microsoft.CodeAnalysis.FindUsages.DefinitionItem.Create(ImmutableArray`1 tags, ImmutableArray`1 displayParts, ImmutableArray`1 sourceSpans, ImmutableArray`1 nameDisplayParts, ImmutableDictionary`2 properties, Boolean displayIfNoReferences)
   at Microsoft.CodeAnalysis.FindUsages.DefinitionItem.Create(ImmutableArray`1 tags, ImmutableArray`1 displayParts, ImmutableArray`1 sourceSpans, ImmutableArray`1 nameDisplayParts, Boolean displayIfNoReferences)
   at Microsoft.CodeAnalysis.Editor.TypeScript.Features.GoToDefinition.NamedDefinitionItemExtensions.TryGetNavigableDefinitionItem(NamedDefinitionItem namedDefinition, Project currentProject, IFilePathDefinitionItemProvider filePathDefinitionItemProvider, JoinableTaskContext joinableTaskContext, DefinitionItem& definitionItem)
   at Microsoft.CodeAnalysis.Editor.TypeScript.Features.GoToDefinition.TypeScriptGoToSymbolService.<GetSymbolsAsync>d__4.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.CodeAnalysis.Editor.NavigableSymbols.NavigableSymbolService.NavigableSymbolSource.<GetNavigableSymbolAsync>d__5.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.VisualStudio.Language.Intellisense.Implementation.GoToDefMouseHandler.<QueryNavigableSymbolAsync>d__35.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.VisualStudio.Language.Intellisense.Implementation.GoToDefMouseHandler.<SetMouseCursorAndNavigableSpanHelperAsync>d__33.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at Microsoft.VisualStudio.Language.Intellisense.Implementation.GoToDefMouseHandler.<SetMouseCursorAndNavigableSpanHelperAsync>d__33.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.VisualStudio.Language.Intellisense.Implementation.GoToDefMouseHandler.<>c__DisplayClass32_0.<<SetMouseCursorAndNavigableSpanAsync>b__0>d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.VisualStudio.Threading.JoinableTask.<JoinAsync>d__78.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.VisualStudio.Threading.JoinableTask`1.<JoinAsync>d__3.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.VisualStudio.Language.Intellisense.Implementation.GoToDefMouseHandler.<SetMouseCursorAndNavigableSpanAsync>d__32.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.VisualStudio.Text.Utilities.GuardedOperations.<CallExtensionPointAsync>d__32.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at Microsoft.VisualStudio.Telemetry.WindowsErrorReporting.WatsonReport.GetClrWatsonExceptionInfo(Exception exceptionObject)

https://www.facebook.com/groups/MHVB.Net/permalink/1679882212162998/

행복한 고수되셔요.

woojja ))*

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asp.net mvc5 에서 ES5 Setting 하는 방법에 대해 알아봤습니다.

다음과 같은 글이 있어 공유합니다.

https://sung.codes/blog/2017/05/22/setting-es6-environment-asp-net-mvc-5/

행복한 고수되십시오.

woojja ))*

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Controller 에 RoutePrefix Attribute 를 설정해도 작동하지 않는 경우가 있다.

이는 한가지를 설정해주지 않아서 일텐데...

    public class RouteConfig
    {
        public static void RegisterRoutes(RouteCollection routes)
        {
            routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
            
            routes.MapMvcAttributeRoutes();
            routes.MapRoute(
                name: "Default",
                url: "{controller}/{action}/{id}",
                defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
            );
        }
    }

위와 같이 routes.MapMvcAttributeRoutes(); 를 추가해준다.

위 구문을 추가해주면 각 Controller 의 노출된 Action Method 에 기본적으로 Route Attribute 를 추가해주어야 한다.

행복한 고수되셔요.

woojja ))*

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ls -l 명령어는 사용가능하지만 ll 명령어는 찾을 수 없다는 메세지를 뱉을 때는...

sudo nano ~/.bashrc 를 입력하여 

주석처리되어 있는 아래 구문의 주석을 제거해준다.

#alias ll='ls -l' 

#alias la='ls -A'

#alias l='ls -CF'

이보다 먼저

sudo nano .bash_profile

를 열어

export PATH=%PATH:/bin:/usr/local/bin:/usr/bin

가 추가되어 있는지 확인해 보는 것도 좋다.

행복한 고수되셔요.

woojja ))*

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windows command 창에서 ipconfig 명령어와 같은 명령어로

ifconfig 와  iwconfig 가 있다.

raspberry pi 의 기본 wifi 는 wlan0 으로 설정되어 있다.

sudo raspi-config 를 통해 wifi 설정이 가능하며

wifi 설정 이전에 국가 코드를 입력하는 화면이 나타나며

오류가 발생할 수 있으므로 기본 GB (영국) 을 수정하지 않았다.

SSID 명과 비밀번호를 입력하면 설정이 끝난다.

아래 명령을 통해 주변의 AccessPoint 를 검색하는 것도 가능하다.

sudo iwlist wlan0 scan

SSID 를 알고 있는 경우 아래와 같이 입력하여 지정가능하다.

sudo wpa_passphrase ssid password

==> sudo wpa_passphrase WoojjaAccessPoint WoojjaPassword

iwconfig 나 ifconfig 명령을 통해서 wlan0 이 설정되어 있는지 확인한다.

하지만 AccessPoint 가 숨김처리 되어 있다면 위 그림과 같이 연결되지 않을 수 있다.

이런 경우 아래 명령을 통해 해당 파일을 열어 

sudo nano /etc/wpa_supplicant/wpa_supplicant.conf

다음과 같이 추가할 구문이 있다.

ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1
country=GB

network={
        ssid="WoojjaAccessPoint_SSID"
        #psk="WoojjaPassword"
        psk=98698b6c797140f3bWoojjaPassword53c04c5ed47948796e4920
}


==> 

ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1
country=GB

network={
        ssid="WoojjaAccessPoint_SSID"
        scan_ssid=1
        mode=0
        proto=WPA2
        pairwise=TKIP
        group=TKIP
        key_mgmt=WPA-PSK
        #psk="WoojjaPassword"
        psk=98698b6c797140f3bWoojjaPassword53c04c5ed47948796e4920
}

sudo reboot 명령을 실행하여  Reboot 한다.

잘 안되는 경우 해당 wlan0 내렸다가 올리는 명령어도 존재한다.

sudo ifconfig wlan0 down

sudo ifconfig wlan0 up

아래 글을 참고했습니다. 고맙습니다.

https://webnautes.tistory.com/903

행복한 고수되셔요.

woojja ))*

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