Questions




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1
How to delete a file, after checking if it exists or not using C#?

I would like to know, how can I delete a file, after checking if it exists on the hard disk, if yes, then delete it, using C# in asp.net?

Thanks

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1
Remove duplicates from datatable in C#

Hello

based on this

https://www.technical-recipes.com/2017/obtaining-combinations-of-k-elements-from-n-in-c/#comment-52343

I create my data and I store them in a datatable.

Now I have another datatable which I fill it from my database.

I need to remove the duplicates from the first datatable and fill a datagridview.

This is what I have so far

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1
How to disable auto-complete in HTML Form input field?

Hello, I would like to know, how I can disable HTML form input field auto-complete, done by chrome and other majore browsers.

Thanks

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0
Re-request facebook details, if User denies scope ("manage_page") using Startup.cs in ASP.NET Core

Hi, 

Facebook docs give this javascript code as shown below for oAuth login re-request

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2
No project was found, change the current working directory or use the --project option

Hi, I'm adding a new class in my asp.net core 2 project and this class is mapped to one of the table in database, I want to use migrations to create the table from my model,
 So I was running this command as shown below in the image:

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2
How do I set a project as startup project in Visual Studio Code?

I am looking for a solution to set a project as start-up project in Visual Studio code, like in Visual Studio 2015/2017 or in any other recent version, I right click a project within solution explorer and set it as startup.

However, I am not able to do that in VS Code. So, how can I accomplish that in VS Code? Thanks.

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1
Return User to login page, if user doesn't "Allow" facebook permissions in ASP.NET Core application

Hi, I have created an app at Facebook developer page and configured that with my Identity server application URL. Identity server4 application is built in asp.net core.

When user enter the website and tries to connect it using his/her Facebook account, then my app created under Facebook developer ask him the permission to allow the app to receive her information like email adress, age, etc, when user cancelled the permission he is redirected to page "Account/Login" I have followed the steps in this link : https://qawithexperts.com/questions/387/access-denied-when-permission-of-app-to-my-application-is-de

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1
How to find missing date between two dates in sql table.

I would like to know a sql query to find all missing dates between two dates , suppose my sql table is as below

ID

Date

1

2018-1-10

2

2018-1-12

3

2018-1-13

4

2018-1-15

5

2018-1-17

6

2018-1-18

7

2018-1-20

8

2018-1-21

 

I need to run sql query which will return missing dates from date column like  ‘2018-1-11’ , ‘2018-1-14’.

 

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2
How to clean and build solution in visual studio code (.net core2)

Hi, I want to build and clean my project solution in visual studio code, but I can't find the option of clean and build in visual studio code, like we clean the project by clicking right project and click on "Clean" or "Build" in Visual Studio.

How can I do the same thing in visual studio code. Thanks.

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2
how can I set a specific page as a default page in .net core 2 using visual studio code

Hi, I'm using visual studio code to develop a web site using asp.net core 2. when I debug the project the default page is set as : https://localhost:xxxx

I want to set my page : "Account/Login" as my website's default page .

means when I debug the project the first screen should appear will this : https://localhost:xxxx/Account/Login

how can I do that?

Thanks 

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