Author Archives: WUDI

SQL Server – <> and Null

Posted on May 25, 2024 by WUDI

Where with not equal <> not equal will include NULL column, so if table has null value, consider to add null check statement.

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Change Default Path for cmd.exe

Posted on October 2, 2023 by WUDI

Step 1 search on star menu, type ‘command’ click on ‘Open file location’. Step 2 right click on command in opened folder Now in ‘Start in’ field, put path you want.

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How to turn ‘Not Run Tests’ into normal test in Visual Studio

Posted on September 19, 2022 by WUDI

all unit tests in newly added Unit Test Project are not appeared in ‘Test Explorer’ or those unit tests are marked as “Not Run Tests” and never run it no matter how hard you pressure visual studio to run. do … Continue reading →

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TypeScript Define

Posted on November 7, 2021 by WUDI

process.env type define add following code before `process.env.NODE_ENV` 1 2 3 4 5 6 7 declare var process : { env: { NODE_ENV: string } }   process.env.NODE_ENVdeclare var process : { env: { NODE_ENV: string } } process.env.NODE_ENV define … Continue reading →

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C# @keyword as escape of keyword

Posted on May 29, 2021 by WUDI

it is very common to see that C# code use @keyword such as @this to escape ‘this’ as keyword to use it like a local variable. 1 2 3 4 5 6 7 8 9 class @class { public static … Continue reading →

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“corecrt.h”: No such file or directory

Posted on May 28, 2021 by WUDI

if %include% is lost, VS could not find header. add sdk C:\Program Files (x86)\Windows Kits\10\Include into %include% path to fix issue.

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Operation Failed An exception was thrown while initializing part “NuGet.PackageManagement.VisualStudio.VSSolutionManager”. GetFullVsVersionString must be called on the UI thread.

Posted on April 14, 2021 by WUDI

Visual Studio 2015 update 3 could throw this exception. the way to fix it 1. open vs2015 and don’t open any project. 2. go to menu ‘Tools’ -> Nuget Package Manager -> Package Manager Setting 3. once you see dialog … Continue reading →

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PriorityQueue in C#

Posted on January 9, 2021 by WUDI

PriorityQueue is a binary heap. Heap is commonly used algorithm. in some area such Graph shortest path and minimum spanning tree, it is very helpful. both Java and C++ has PriorityQueue, but C# don’t have. Here is a version of … Continue reading →

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WCF – How to publish WCF into IIS

Posted on February 4, 2020 by WUDI

1. copy web.config 2. copy service.svc 3. copy dll and pdb file into bin folder 4. in iis, setup a new web instance, and point physical folder address into published folder setup .net support version correctly for web instance. 5. … Continue reading →

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Interface out T vs T

Posted on May 16, 2019 by WUDI

The out keyword in generics is used to denote that the type T in the interface is covariant. check following code. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 … Continue reading →

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