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Facing error 'Microsoft.EntityFrameworkCore.DbUpdateConcurrencyException'...

Himy problem is that when i disable my input control as follow :<div class="form-group"><label asp-for="OrderId" class="control-label"></label><input asp-for="OrderId"...

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How to implement servicehost in asp.net core

Hi Team,How to implement serviceshost in .net core I migrated asp.net project to .net core 3.1 but found servicehost is not supportedis any way to implement this or any suggestion would be helpful.

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Problem to send ajax request to delete item (Returns not found!).

Hiin my form, i have a list of orders which user can click on delete button to delete each order of specific person. here is my orders list :@model IEnumerable<Orders><input type="hidden"...

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File name when uploading

When uploading an image, and if the image is named rover.jpg, and I want the uploaded image to be rover456.jpg, how do I name it?This Github example uses a random name:using System.Collections.Generic;...

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How to access ViewData from external javascript ?

Hii've use this external javascript function to access ViewData variable(s) :function deleteOrderItem(orderID) { if (confirm('Are you sure want to delete this item?')) {$.ajax({ type: "POST", url:...

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how to fix JSON Self Referencing Loop Exceptions

My Project in asp.net core 3.0 .Net core framework I have the following  model.When I run the query in postman the following error is coming 'JSON Self Referencing Loop Exceptions'  when I try to...

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Multiple routes and global attributes

hi guysI am playing around with razor pages and building a new website with it.How do I add a global configuration to all the files in a folder e.g Pages >> Accounts folder (I know in webforms I...

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Upload image .net core 3.1

Before code generated:@page @model pcore31.CreateModel @{ Layout = null; } <!DOCTYPE html><html><head><meta name="viewport" content="width=device-width"...

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Front end for .Net Core 3.1

I want to develop a big enterprise application in .Net core. what pattern should i follow for front & backend?.Net core with bootstrap+Jquery .Net core with Razor .Net core with Blazor .Net core...

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how do I update a Custom base controller

hi guysAs I said in my last post, I just moved to razor pages and tyring to get a hang of it.In MVC I always inherit a base controller in all my controllers e.g. for admin accounts I have my custom...

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Upload image or multiple using razor page only, no code behind

I know how to use sql server in razor, just quick example:@page @using System.Data.SqlClient @using System.Collections.Generic; @using System.Data; @using System.Linq; @using System.Threading.Tasks;...

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Restful API and Async API

HiPlease can you advise me  what is the difference between Restful API and Async API. What is the best choice  for an application. I am confused what should I use in a project  either Restful API or...

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Null Exception Issue When Working with Jwt Token

Hello Microsoft Team,When i try to login by username and password. null exception error occur when controller hit opt.TokenValidationParameters = new TokenValidationParameters() which is available in...

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Identity Framework vs. Identity Server

Hello everyone and thanks for your help in advance.  I am new to .Core and in the premilitary stages of migrating an intranet along with some external facing api services.  My first task is reading up...

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Problem with Session when getting string data to the action of controller

Hi guys,As some of you knows, I'm developing a quiz application. I have timer in question view and this time I need to get the time between opening the question view and submitting the answer. Then I...

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Inconsistent accesibility:parameter type; HomeControler(IRepositoryissue) is...

HomeController.Homecontroller(Irepository<Issue>issue)Hi, I don't understand why I am getting this error. Below is part of the home controller that I am using.  I have tried everything. I am...

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Facing error 'Microsoft.EntityFrameworkCore.DbUpdateConcurrencyException'...

Himy problem is that when i disable my input control as follow :<div class="form-group"><label asp-for="OrderId" class="control-label"></label><input asp-for="OrderId"...

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What does ASP.NET Core Identity provide that I cannot do with bare...

Hi folks,I'm looking into removing Azure B2C from a project of mine, for reasons relating to automation and such (which B2C is not yet very compatible with), but want to keep my auth work flows the...

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Does ManualResetEventSlim signaling degrades performance?

I am using ManualResetEventSlim to have signaling mechanism in my application and It works great if requests/sec are 100. As I increase request/sec, it gets worse.Example:100 Requests/sec -> 90%...

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Error de migracion al publicar

I have an error when I publish my project, in the dbcontext not show the the conection string for migration.

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