小编pan*_*nis的帖子

我正在尝试将字符串转换为布尔值.有几种方法可以做到这一点

let input = "true";
let boolVar = (input === 'true');

这里的问题是我必须验证输入是真还是假.而不是验证第一个输入然后进行转换是否有更优雅的方式？在.NET中bool.TryParse,如果字符串无效,则返回false.打字稿中是否有相应的东西？

我正在尝试使用以下GetValue<T>方法从appsettings.json文件中读取列表：

var builder = new ConfigurationBuilder().SetBasePath(System.AppContext.BaseDirectory)
                .AddJsonFile("appsettings.json", optional: false, reloadOnChange: true);

IConfigurationRoot configuration = builder.Build();
var rr = configuration.GetValue<IList<ConnectionSettings>>("Connections");


public class ConnectionSettings
{
    public string Name { get; set; }

    public string Host { get; set; }

    public string Account { get; set; }

    public string Password { get; set; }
}

和我的appsettings.json

{
"Connections": [
    {
      "Name": "",
      "Host": "192.168.1.5",
      "Account": "74687",
      "Password": "asdsdadsq"
    },
    {
      "Name": "",
      "Host": "127.0.0.1",
      "Account": "45654",
      "Password": "asdasads"
    }
  ]
} …

我已经阅读了很多关于 Angular 文件夹结构的文章。我仍然不清楚我们把组件服务放在哪里。组件之间的共享服务被置于共享之下。但是仅由组件使用的服务呢？通常，我将所有组件逻辑都放入一个服务中，并将仅与 UI 相关的代码留给组件。哪个更好用：

每个组件和它的服务放到同一个文件夹中

.
??? app.component.html
??? app.component.ts
??? app.module.ts
??? app-routing.module.ts
??? shop
    ??? clients
    ?   ??? clients.component.html
    ?   ??? clients.component.ts
    ?   ??? clients.component.css
    ?   ??? clients.service.ts
    ??? orders
    ?   ??? orders.component.html
    ?   ??? orders.component.ts
    ?   ??? orders.component.css
    ?   ??? orders.service.ts
    ??? shop.module.ts
    ??? shop-routing.module.ts                 

或服务文件夹下模块的所有服务

.
??? app.component.html
??? app.component.ts
??? app.module.ts
??? app-routing.module.ts
??? shop
    ??? clients
    ?   ??? clients.component.html
    ?   ??? clients.component.ts
    ?   ??? clients.component.css
    ??? orders
    ?   ??? orders.component.html
    ?   ??? orders.component.ts …

我在 Windows 服务中的 EF Core 和 Autofac 上使用存储库模式。

我有一项服务需要与几十个数据库连接，这些数据库具有相同的架构（相同的 dbcontext）但只有不同的数据。如何使用 Autofac 在我的服务中实现这一目标？贝洛

public class ReportRepository : IReportRepository
    {
        private readonly ReportDbContext dbContext;

        public ReportRepository(ReportDbContext dbContext)
        {
            this.dbContext = dbContext
        }

        public SomeModel GetData()
        {
            return dbContext.SalesData;
        }
    }

    public class ReportService : IReportService 
    {
        private readonly IReportRepository reportRepositoryEUServer;

        public ReportService(IReportRepository reportRepositoryEUServer)
        {
            this.reportRepositoryEUServer = reportRepositoryEUServer
        }

        public SomeModelDto GenerateReport()
        {
            var euData =  reportRepositoryEUServer.GetData();
            // I need to call other servers (e.g LATAM) here and get the data and aggregate …

我正在使用protobuf-net序列化对象，但出现异常：

无法将更改应用于属性TestProject.TestMessage.ClientId

使用stacktrace：

at ProtoBuf.Serializers.PropertyDecorator.SanityCheck(TypeModel model, PropertyInfo property, IProtoSerializer tail, Boolean& writeValue, Boolean nonPublic, Boolean allowInternal)
at ProtoBuf.Serializers.PropertyDecorator..ctor(TypeModel model, Type forType, PropertyInfo property, IProtoSerializer tail)
at ProtoBuf.Meta.ValueMember.BuildSerializer()
at ProtoBuf.Meta.ValueMember.get_Serializer()
at ProtoBuf.Meta.MetaType.BuildSerializer()
at ProtoBuf.Meta.MetaType.get_Serializer()
at ProtoBuf.Meta.RuntimeTypeModel.Serialize(Int32 key, Object value, ProtoWriter dest)
at ProtoBuf.Meta.TypeModel.SerializeCore(ProtoWriter writer, Object value)
at ProtoBuf.Meta.TypeModel.Serialize(Stream dest, Object value, SerializationContext context)
at ProtoBuf.Meta.TypeModel.Serialize(Stream dest, Object value)
at ProtoBuf.Serializer.Serialize[T](Stream destination, T instance)

我的课程是：

[DataContract]
public class TestMessage
{
    private int clientId;
    [DataMember(Order = 1)]
    public int ClientId
    {
        get { …

我已在带有最新 resharper 的新笔记本电脑上安装了 VS2017 Enterprise 15.9.11，当我单击 Ctrl + 时。在类类型上，“快速操作和重构”菜单会打开，但缺少提取界面。

知道为什么它不显示吗？

我有一张三列的桌子。客户ID为空。

public class ProductType
{
    public int Id { get; set; }

    public string Name { get; set; }

    public long? ClientId { get; set; }
}

当我运行以下代码时：

public async Task GetClientType(string productTypeName, long clientId)
        {
            var clientResult = await (from productType in context.ProductType
                                      where productType.Name == productTypeName
                                            && productType.ClientId == clientId
                                      select productType).FirstOrDefaultAsync();


            .......
        }

尽管数据库包含此查询的结果，但我没有得到任何结果。然后，我检查了由EF Core生成的查询，并且看到生成了以下内容：

SELECT TOP(1) [productType].[Id], [productType].[Name], [productType].[ClientId]
FROM [ProductType] AS [productType]
WHERE [productType].[ClientId] IS NULL AND (([productType].[Name] = 'test client') AND ([productType].[ClientId] = 1)) …

我正在尝试映射从数据库中获得的结果，并且我有以下模型

public class ClientTest
{
    public int Id { get; set; }
    public string Name { get; set; }
}

public class ClientTestDto
{
    public int Id { get; set; }
    public string Name { get; set; }
}

public class ClientDbItem
{
    public ClientTest Client { get; set; }
    public Address Address { get; set; }
}

public class Address
{
    public int Id { get; set; }
    public string Value { get; set; }
}

和以下映射

CreateMap<ClientTest, ClientTestDto>(); …

我正在cmd中输入：

dotnet publish MyProject.Web.csproj --configuration Release --framework netcoreapp3.1 --runtime win-x64 --self-contained true --output '\bin\Release\netcoreapp3.1\publish'

我收到以下错误。

C:\Program Files\dotnet\sdk\3.1.102\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Publish.targets(152,5): error MSB3094: "DestinationFiles" refers to 1 item(s), and "SourceFiles" refers to 428 item(s). They must have the same number of items. [C:\BuildAgent\work\7e7906b985af1c3\src\MyProject.Web\MyProject.Web.csproj]

这是我的 MyProject.Web.csproj 文件

<Project Sdk="Microsoft.NET.Sdk.Web">

  <PropertyGroup>
    <TargetFramework>netcoreapp3.1</TargetFramework>
    <Authors>MyCompany Ltd</Authors>
    <Company>MyCompany Ltd</Company>
    <AssemblyVersion>1.0.0</AssemblyVersion>
    <FileVersion>1.0.0</FileVersion>
    <Version>1.0.0</Version>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Autofac" Version="5.1.4" />
    <PackageReference Include="Autofac.Extensions.DependencyInjection" Version="6.0.0" />
    <PackageReference Include="AutoMapper.Extensions.Microsoft.DependencyInjection" Version="7.0.0" />
    <PackageReference Include="Microsoft.AspNetCore.Authentication.JwtBearer" Version="3.1.3" />
    <PackageReference Include="Microsoft.AspNetCore.Mvc.NewtonsoftJson" Version="3.1.3" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="3.1.3">
      <PrivateAssets>all</PrivateAssets>
      <IncludeAssets>runtime; …

我已经在生产机器上部署了我的应用程序。我正在发布 Release、win-x64 和 --self-contained true。我已经安装了 .net core 3.1.7 重新启动了 VPS，我得到：

未找到指定版本的 Microsoft.NetCore.App 或 Microsoft.AspNetCore.App。

dotnet --info 返回：

  It was not possible to find any installed .NET Core SDKs
  Did you mean to run .NET Core SDK commands? Install a .NET Core SDK from:
      https://aka.ms/dotnet-download

Host (useful for support):
  Version: 3.1.7
  Commit:  fcfdef8d6b

.NET Core SDKs installed:
  No SDKs were found.

.NET Core runtimes installed:
  Microsoft.AspNetCore.App 3.1.7 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 3.1.7 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]

To install additional .NET Core runtimes or SDKs: …