.net-core-3.0

问题 I have a client side Blazor Application. I want to have an appsetting.json file for my client-side configuration like we have an environment.ts in Angular. For that, I am keeping a ConfigFiles folder under wwwroot and a JSON file inside of it. I am trying to read this file as below. First get the path: public static class ConfigFiles { public static string GetPath(string fileName) { return Path.Combine("ConfigFiles", fileName); } } Than read it: public string GetBaseUrl() { string T = string

问题 I have a client side Blazor Application. I want to have an appsetting.json file for my client-side configuration like we have an environment.ts in Angular. For that, I am keeping a ConfigFiles folder under wwwroot and a JSON file inside of it. I am trying to read this file as below. First get the path: public static class ConfigFiles { public static string GetPath(string fileName) { return Path.Combine("ConfigFiles", fileName); } } Than read it: public string GetBaseUrl() { string T = string

问题 We are building an asp.net core 3 application which uses ef core 3.0 with Pomelo.EntityFrameworkCore.MySql provider 3.0. Right now we are trying to replace all database calls from sync to async, like: //from dbContext.SaveChanges(); //to await dbContext.SaveChangesAsync(); Unfortunetly when we do it we expereince two issues: Number of connections to the server grows significatntly compared to the same tests for sync calls Average processing speed of our application drops significantly What is

问题 We are building an asp.net core 3 application which uses ef core 3.0 with Pomelo.EntityFrameworkCore.MySql provider 3.0. Right now we are trying to replace all database calls from sync to async, like: //from dbContext.SaveChanges(); //to await dbContext.SaveChangesAsync(); Unfortunetly when we do it we expereince two issues: Number of connections to the server grows significatntly compared to the same tests for sync calls Average processing speed of our application drops significantly What is

问题 After reading through several answers (.NET Core 3.0 - Preview 2 - Razor views don't automatically recompile on change) that recomend installing Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation NuGet package to get back runtime compilation, I tried the suggested solutions but the project gets the following error message simply by installing the package without even using AddRazorRuntimeCompilation(): The project "project name" must provide a value for configuration double clicking in the

问题 After reading through several answers (.NET Core 3.0 - Preview 2 - Razor views don't automatically recompile on change) that recomend installing Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation NuGet package to get back runtime compilation, I tried the suggested solutions but the project gets the following error message simply by installing the package without even using AddRazorRuntimeCompilation(): The project "project name" must provide a value for configuration double clicking in the

问题 I am looking into Blazor and I stumbpled on this expression: @onclick="(() => SomeMethod(parameter))" I cannot find/google anywhere what does this (I guess lambda) expression is actually doing. Can anybody explain me please this part: () => and why to use it and where? EDIT: What is the difference between the above and this: @onclick="SomeMethod(parameter)" 回答1: () =>() is basically a lambda function. Imagine you have a function delegate (int foo) { return foo*2}; this can be rewritten as

问题 I am looking into Blazor and I stumbpled on this expression: @onclick="(() => SomeMethod(parameter))" I cannot find/google anywhere what does this (I guess lambda) expression is actually doing. Can anybody explain me please this part: () => and why to use it and where? EDIT: What is the difference between the above and this: @onclick="SomeMethod(parameter)" 回答1: () =>() is basically a lambda function. Imagine you have a function delegate (int foo) { return foo*2}; this can be rewritten as

问题 { "TestData":{ "Year__of__Account":"2019", "Tax___x0025_":"0.06", "Buildings__1":"1000", "Contents__1":"400", "Total_Insurable_Value":"100", "Buildings__Prem":"2560.8", "Contents__Prem":"1707.2", "YB__1":"1950", "No__Buildings":"55", "Location_Sprinklers_YN":"No", "test":"test" } } In the above sample JSON I want to add a property called "Name" with Value "John" inside property "TestData". How can I achieve this using .net Core 3.0 System.Text.Json library. I have tried using methods of

问题 I am trying to execute a linq query to get all employes that have some specific skills. search.skills is a list of strings with some skills and I want to retrieve all the user which have all those skills (And condition). In my where clause on employees, exp.Skills is ICollection and expSkill.SkillName is the skill name .Where( emp => search.Skills.All( searchSkill => emp.Experiences.Select(exp => exp.Skills).SelectMany(x => x).Select(expSkill => expSkill.SkillName).Contains(searchSkill) ))