# dotnet9-learn-resource

**Repository Path**: EEPPEE_admin/dotnet9-learn-resource

## Basic Information

- **Project Name**: dotnet9-learn-resource
- **Description**: project base
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: main
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2024-12-21
- **Last Updated**: 2024-12-26

## Categories & Tags

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**Tags**: None

## README

Certainly! Below is an example of SQL code that could be used to create the tables for an outpatient doctor workstation system based on the elements mentioned earlier. Please note that this is a simplified example and may need to be adjusted to fit the specific requirements and constraints of your actual system.

```sql
-- Create the 'Departments' table
CREATE TABLE Departments (
    DepartmentID INT PRIMARY KEY AUTO_INCREMENT,
    DepartmentName VARCHAR(255) NOT NULL,
    DepartmentAddress VARCHAR(255),
    DepartmentPhone VARCHAR(20),
    DepartmentHead VARCHAR(255)
);

-- Create the 'Doctors' table
CREATE TABLE Doctors (
    DoctorID INT PRIMARY KEY AUTO_INCREMENT,
    DoctorName VARCHAR(255) NOT NULL,
    Gender CHAR(1),
    Age INT,
    Title VARCHAR(100),
    DepartmentID INT,
    FOREIGN KEY (DepartmentID) REFERENCES Departments(DepartmentID)
);

-- Create the 'Patients' table
CREATE TABLE Patients (
    PatientID INT PRIMARY KEY AUTO_INCREMENT,
    PatientName VARCHAR(255) NOT NULL,
    Gender CHAR(1),
    Age INT,
    WardID INT,
    DoctorID INT,
    BloodType VARCHAR(10),
    Diagnosis TEXT,
    DepartmentID INT,
    FOREIGN KEY (DepartmentID) REFERENCES Departments(DepartmentID),
    FOREIGN KEY (DoctorID) REFERENCES Doctors(DoctorID)
);

-- Create the 'Wards' table
CREATE TABLE Wards (
    WardID INT PRIMARY KEY AUTO_INCREMENT,
    BedCount INT,
    WardAddress VARCHAR(255),
    DepartmentID INT,
    FOREIGN KEY (DepartmentID) REFERENCES Departments(DepartmentID)
);

-- Create the 'Nurses' table
CREATE TABLE Nurses (
    NurseID INT PRIMARY KEY AUTO_INCREMENT,
    NurseName VARCHAR(255) NOT NULL,
    Gender CHAR(1),
    Age INT,
    DepartmentID INT,
    FOREIGN KEY (DepartmentID) REFERENCES Departments(DepartmentID)
);

-- Create the 'Assignments' table to associate Wards and Nurses
CREATE TABLE Assignments (
    WardID INT,
    NurseID INT,
    PRIMARY KEY (WardID, NurseID),
    FOREIGN KEY (WardID) REFERENCES Wards(WardID),
    FOREIGN KEY (NurseID) REFERENCES Nurses(NurseID)
);
```

This SQL code creates five tables: `Departments`, `Doctors`, `Patients`, `Wards`, and `Nurses`, along with an `Assignments` table to associate wards with nurses. Each table has a primary key, and foreign keys are used to establish relationships between tables.

Please remember to adjust data types, lengths, and constraints according to your specific needs. Additionally, you may need to create indexes for performance optimization, set up more complex relationships, and include additional tables and fields as required by your system's design.
===================================================================================================================================================================================================================
要使用命令行工具下载Avalonia UI的依赖，您可以使用以下步骤和代码示例：

1. **安装Avalonia UI模板**：
   在您的开发环境中，首先需要安装Avalonia UI的模板。这可以通过以下命令完成：
   ```shell
   dotnet new install Avalonia.Templates
   ```
   这将允许您在创建新项目时使用Avalonia UI模板。

2. **添加依赖注入包**：
   在您的Avalonia项目目录中，运行以下命令来安装依赖注入的包：
   ```shell
   dotnet add package Microsoft.Extensions.DependencyInjection
   ```
   这将添加依赖注入功能到您的项目中。

3. **恢复NuGet包**：
   在项目的根目录下，如果您使用的是命令行，执行以下命令来恢复所有的NuGet包：
   ```shell
   dotnet restore
   ```
   这将确保所有依赖项都已正确下载并添加到您的项目中。

以上步骤将帮助您通过命令行工具下载和设置Avalonia UI的依赖项。

===================================================================================================================================================================================================================
门诊医生工作站系统的后端数据库设计是一个复杂的过程，涉及到多个模块和数据表的设计。以下是一些关键的数据库设计元素，基于搜索结果中提供的信息：

1. **数据库创建**：
   - 首先，需要创建一个数据库，例如名为“医院信息管理系统”。

2. **表结构设计**：
   - **医生表**：包含医生编号、姓名、性别、年龄、职称、科室号等字段。
   - **科室表**：包含科室号、科室名、科室地址、科室电话、科室主任等字段。
   - **病人表**：包含病历号、姓名、性别、年龄、病房号、医生姓名、血型、确诊结果、科室号等字段。
   - **病房表**：包含病房号、床位数、病房地址、科室号等字段。
   - **护士表**：包含护士编号、姓名、性别、年龄、科室号等字段。
   - **分配表**：关联病房号和护士编号，作为复合主键。

3. **主外键约束**：
   - 设计表之间的主外键约束关系，确保数据的完整性和一致性。例如，医生表中的科室号作为外键关联到科室表的科室号。

4. **默认值和非空约束**：
   - 对于某些字段，如职称，可以设置默认值（例如，默认为“医师”）。

5. **E-R图设计**：
   - 根据系统的需求，设计实体-关系图（E-R图），明确实体之间的关系，如病人与科室、医生与科室的关系。

6. **数据流程分析**：
   - 分析病人看病的主要流程，如挂号、分配科室、医师看病、前台充值、药房取药等，这些流程将影响数据库设计，特别是在设计事务和流程管理方面。

7. **技术可行性分析**：
   - 考虑系统在不同操作系统上的运行环境，确保数据库设计能够支持系统在Windows和Linux操作系统中的稳定运行。

8. **概念结构设计**：
   - 抽象出系统的主要实体，如患者、科室、医师、药师、前台收银、药品、挂号单、处方信息等。

9. **逻辑结构设计**：
   - 根据概念结构设计，进一步细化数据库的逻辑结构，包括表的设计、字段的数据类型、索引、视图等。

这些设计元素构成了门诊医生工作站系统后端数据库设计的基础。在实际设计过程中，还需要考虑数据安全、备份、恢复、性能优化等因素。


要将Avalonia UI集成到门诊医生工作站系统中，可以遵循以下步骤：

1. **依赖注入（DI）**：
   - 在Avalonia UI项目中实现依赖注入，以管理服务和视图模型的生命周期。首先，需要安装依赖注入的NuGet软件包 `Microsoft.Extensions.DependencyInjection`。
   - 创建一个扩展方法 `AddCommonServices` 来注册服务到服务集合中，例如 `IRepository`、`BusinessService` 和 `MainViewModel`。

2. **修改App.xaml.cs**：
   - 在 `App.xaml.cs` 中初始化依赖注入容器，并解析注册的视图模型，然后设置为主视图的数据上下文。

3. **创建窗口**：
   - 使用Avalonia UI创建窗口，并添加一个WebView组件来托管Blazor混合应用程序的前端部分。

4. **集成Blazor**：
   - 如果门诊医生工作站系统需要与Blazor集成，可以通过Avalonia UI创建窗口，并在其中添加BlazorBrowserView组件，从而实现前后端的通信。

5. **MVVM模式**：
   - 应用MVVM设计模式，将界面逻辑和业务逻辑分离，提高代码的可维护性和灵活性。在Avalonia中，ViewModel负责处理界面逻辑和业务逻辑，以及数据的绑定和交互。

6. **事件处理和命令绑定**：
   - 实现事件处理和命令绑定，以实现控件与ViewModel之间的交互。例如，当按钮被点击时，可以触发一个命令，该命令在ViewModel中执行相应的操作。

7. **集成后端服务**：
   - 门诊医生工作站系统后端可能使用SpringBoot等技术栈。通过创建RESTful API，Avalonia UI前端可以与后端服务进行通信，获取数据和提交请求。

通过上述步骤，可以将Avalonia UI集成到门诊医生工作站系统中，构建一个现代化、跨平台的医疗信息系统。


门诊医生工作站系统是医院信息化建设的重要组成部分，它为医生提供了一个数字化的工作平台，以提高医疗服务的效率和质量。根据搜索结果，门诊医生工作站系统的主要功能包括：

1. **病历管理**：门诊医生工作站为每个患者的每次就诊建立门急诊病历，医生可以通过辅助输入法和病历模板等手段书写门急诊病历，包括基本信息、初诊病历、病史、体格检查等。

2. **电子处方**：医生可以通过系统开立电子处方，包括成药西药、草药和其他处方，系统提供多种录入方式，并辅助提示药品信息，如药理作用、用法用量和不良反应等。

3. **检查/检验单管理**：医生通过门诊医生工作站开具检查/检验申请单，并打印申请单。相应科室通过HIS实时接收申请单，安排预约。在检查/检验科室完成相应项目并出具报告后，门诊医生可以实时浏览报告。

4. **查询功能**：包括病历、处方和检查报告单的查询，为医生提供准确、直观、有价值的参考，避免因患者忘带历史资料造成的诊治限制，并节省患者等待时间。

5. **结构化电子病历**：新门诊工作站引入了结构化电子病历，有利于后期自动进行数据内容识别、抽取及与门诊应用系统交互，为智慧门诊打下坚实基础。包括标准ICD-10诊断与自动词频识别、多样病历书写辅助录入工具、门诊病历质控与完整性控制、门诊病历的结构化查询、支持CA签名与医生个性化签章等。

6. **信息共享**：门诊医生工作站与检查/检验科室间的信息通过网络进行传递和共享，极大缩短了手工模式下所需的时间，提高治疗的效率。

7. **辅助支持**：系统为医生提供权威的在线药品咨询，包括配伍禁忌、不良反应、作用、用途、剂量、禁忌症、注意事项等，保证合理用药；提供医疗保险信息；处方费用信息；病历模板和处方模板等。

8. **管理规章融入**：系统将《处方管理办法》和医院的相关规定融入其中，如每张处方不得超过5种药品，处方超过7天用量必须说明原因等，系统强制医生执行这些法规和制度。

这些功能共同构成了门诊医生工作站系统的核心，使其成为提高医疗服务效率和质量的重要工具。


Implementing an entire outpatient doctor workstation system with MVVM architecture and Avalonia UI is quite complex and beyond the scope of a simple response. However, I can provide you with a high-level overview and some main code snippets to get you started on how to structure such an application.

### MVVM Architecture Overview:

1. **Model**: Represents the data and the business logic of the application.
2. **View**: The UI, built with Avalonia UI, that displays the data to the user.
3. **ViewModel**: Acts as a bridge between the View and the Model, handling the presentation logic and exposing data as observable properties that the View can bind to.

### Main Code Structure:

1. **Model**: Define your domain models.
2. **ViewModel**: Create ViewModel classes that implement `INotifyPropertyChanged` for data binding.
3. **View**: Create XAML files for your views.

#### Model (C#)

```csharp
public class Patient
{
    public string PatientId { get; set; }
    public string Name { get; set; }
    // Other properties...
}
```

#### ViewModel (C#)

```csharp
using System.ComponentModel;
using System.Runtime.CompilerServices;
using Avalonia.Data;

public class PatientViewModel : INotifyPropertyChanged
{
    private string _name;

    public string Name
    {
        get => _name;
        set => RaiseAndSetIfChanged(ref _name, value);
    }

    // Other properties and commands...

    public event PropertyChangedEventHandler PropertyChanged;

    protected void OnPropertyChanged([CallerMemberName] string propertyName = null)
    {
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
    }

    protected bool RaiseAndSetIfChanged<T>(ref T field, T value, [CallerMemberName] string propertyName = null)
    {
        if (EqualityComparer<T>.Default.Equals(field, value)) return false;
        field = value;
        OnPropertyChanged(propertyName);
        return true;
    }
}
```

#### View (Avalonia XAML)

```xml
<Window xmlns="https://github.com/avaloniaui"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
        x:Class="YourNamespace.MainWindow">
    <Design.DataContext>
        <YourNamespace.PatientViewModel/>
    </Design.DataContext>
    <Grid>
        <TextBox Text="{Binding Name}" />
        <!-- Other UI elements -->
    </Grid>
</Window>
```

### Explanation:

- **Model**: This is a simple `Patient` class that would represent the data structure for a patient.

- **ViewModel**: The `PatientViewModel` class implements `INotifyPropertyChanged` to notify the View when a property value changes. This is crucial for data binding in MVVM. The `RaiseAndSetIfChanged` method is a helper to raise the `PropertyChanged` event and set the property value in one go.

- **View**: The XAML code defines the UI for the application. It binds the `TextBox` control's `Text` property to the `Name` property of the `PatientViewModel`. The `Design.DataContext` element sets the data context of the view to an instance of `PatientViewModel` for design-time purposes.

To run this application, you would need to set up the Avalonia project, add the necessary NuGet packages, and wire up the View and ViewModel correctly in your application's entry point (e.g., `App.xaml.cs`).

This is a very simplified example, and a real-world application would involve more complex logic, error handling, validation, and possibly more advanced features like commanding (e.g., using `RelayCommand` from `System.Windows.Input` or a similar library). Additionally, you would need to implement the actual business logic for the outpatient doctor workstation system within your ViewModels and Models.


Binding the ViewModel to the View in Avalonia UI is a fundamental part of the MVVM pattern. Here's how you can achieve this:

### 1. Define Your ViewModel

First, ensure your ViewModel implements `INotifyPropertyChanged` to notify the View of property changes.

```csharp
public class MainViewModel : INotifyPropertyChanged
{
    private string _greeting;

    public string Greeting
    {
        get => _greeting;
        set
        {
            _greeting = value;
            OnPropertyChanged();
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;

    protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
    {
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
    }
}
```

### 2. Set the DataContext

In your View (XAML), you can set the `DataContext` directly, but it's more common to set it in the code-behind.

In your View's code-behind (e.g., `MainWindow.axaml.cs`):

```csharp
public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
        this.DataContext = new MainViewModel(); // Set the DataContext to an instance of your ViewModel
    }
}
```

### 3. Bind Properties in XAML

In your XAML, you can now bind controls to properties of your ViewModel.

```xml
<Window xmlns="https://github.com/avaloniaui"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        x:Class="YourNamespace.MainWindow"
        x:Name="window"
        DataContext="{x:Static window.DataContext}">
    <Grid>
        <TextBox Text="{Binding Greeting}" />
        <Button Content="Click Me" Command="{Binding GreetCommand}" />
    </Grid>
</Window>
```

### 4. Define Commands in ViewModel

If you're binding to commands, define them in your ViewModel.

```csharp
public class MainViewModel : INotifyPropertyChanged
{
    // ... existing properties ...

    public ICommand GreetCommand { get; }

    public MainViewModel()
    {
        GreetCommand = new RelayCommand(Greet);
    }

    private void Greet()
    {
        Greeting = "Hello, World!";
    }

    // ... existing INotifyPropertyChanged implementation ...
}

// RelayCommand is a common implementation of ICommand
public class RelayCommand : ICommand
{
    private readonly Action _execute;
    private readonly Predicate<object> _canExecute;

    public RelayCommand(Action execute, Predicate<object> canExecute = null)
    {
        _execute = execute ?? throw new ArgumentNullException(nameof(execute));
        _canExecute = canExecute;
    }

    public bool CanExecute(object parameter) => _canExecute == null || _canExecute(parameter);

    public void Execute(object parameter) => _execute();

    public event EventHandler CanExecuteChanged
    {
        add { CommandManager.RequerySuggested += value; }
        remove { CommandManager.RequerySuggested -= value; }
    }
}
```

### 5. Use Two-Way Binding

For two-way binding (which is common for text boxes and similar controls), you can use the `Binding` mode:

```xml
<TextBox Text="{Binding Greeting, Mode=TwoWay}" />
```

### Explanation:

- **DataContext**: The `DataContext` is a property that all Avalonia controls inherit, which allows you to bind to properties without specifying the full path to the source. By setting the `DataContext` in the code-behind, you ensure that all bindings in the XAML can refer to the ViewModel.

- **Binding**: In XAML, you use the `{Binding}` syntax to bind a control's property to a property on the `DataContext`. You can specify the mode of the binding (e.g., `OneWay`, `TwoWay`, `OneTime`) to control how updates are propagated.

- **Commands**: Commands are a way to handle user actions like button clicks. `ICommand` is an interface that allows you to define whether a command can execute and what happens when it does.

By following these steps, you can bind your ViewModel to your View in Avalonia UI, allowing for a clean separation of concerns and a more maintainable codebase.


To get started with command line tools and .NET Core 9.0, you'll need to follow a series of steps to set up your development environment and create your first .NET Core application. Here's a step-by-step guide:

### Step 1: Install .NET Core SDK

1. **Download the .NET Core SDK**: Go to the official .NET website (https://dotnet.microsoft.com/download) and download the .NET Core SDK that is appropriate for your operating system.

2. **Install the SDK**: Follow the installation instructions provided for your platform. This typically involves running an installer.

### Step 2: Verify the Installation

Open your command line interface (CLI) and type the following commands to verify that the .NET Core SDK has been installed correctly:

```shell
dotnet --version
```

This command should return the version of the .NET Core SDK that you have installed.

### Step 3: Create a New .NET Core Project

You can create a new .NET Core project using the following command:

```shell
dotnet new console -o MyDotNetCoreApp
```

This command creates a new console application in a directory named `MyDotNetCoreApp`.

### Step 4: Navigate to the Project Directory

Change your directory to the newly created project folder:

```shell
cd MyDotNetCoreApp
```

### Step 5: Run the Application

Run your application using the following command:

```shell
dotnet run
```

This command will build and run your application, and you should see the output from the `Main` method in the `Program.cs` file.

### Step 6: Explore the Project

Take a look at the files created by the `dotnet new console` command:

- `MyDotNetCoreApp.csproj`: The project file that contains information about the project and its dependencies.
- `Program.cs`: The main C# file where the `Main` method is located, which is the entry point of the application.
- `obj`: A directory that contains intermediate objects and the final executable.

### Step 7: Add Dependencies

You can add dependencies to your project using the `dotnet add package` command. For example, to add a package called `Newtonsoft.Json`, you would run:

```shell
dotnet add package Newtonsoft.Json
```

### Step 8: Edit the Code

Open `Program.cs` in your favorite code editor and start editing the code. For example, you can modify the `Main` method to perform different actions.

### Step 9: Build the Project

You can build your project using the following command:

```shell
dotnet build
```

This command will create a build of your application in the `bin` directory.

### Step 10: Publish the Project

When you're ready to distribute your application, you can publish it using the following command:

```shell
dotnet publish -c Release
```

This command will create a publish directory with your application's binaries, ready for distribution.

By following these steps, you'll have a basic understanding of how to use the command line with .NET Core 9.0 to create, build, and run .NET Core applications. As you become more comfortable with the CLI, you can explore more advanced features and commands to further develop your .NET Core skills.


Creating a full outpatient doctor workstation system is a complex task that involves many steps and a lot of code. However, I can guide you through the initial steps to set up a basic structure for the system using .NET Core 9.0 and Avalonia UI, following the MVVM pattern.

### Step 1: Set Up the Project

First, you need to install the .NET Core SDK and create a new Avalonia project. Open your command line and run the following commands:

```shell
# Install the .NET Core SDK if you haven't already
dotnet --version

# Install Avalonia template
dotnet new -i Avalonia.Templates

# Create a new Avalonia project
dotnet new avalonia -n OutpatientDoctorWorkstation
```

`OutpatientDoctorWorkstation` is the name of your project. The `dotnet new avalonia` command creates a new Avalonia project with the basic structure.

### Step 2: Navigate to the Project Directory

```shell
cd OutpatientDoctorWorkstation
```

### Step 3: Define the Models

Create a new folder called `Models` in your project directory and add a new file called `Patient.cs`:

```csharp
namespace OutpatientDoctorWorkstation.Models
{
    public class Patient
    {
        public int Id { get; set; }
        public string Name { get; set; }
        public string Gender { get; set; }
        public int Age { get; set; }
        // Add other properties as needed
    }
}
```

### Step 4: Create the ViewModel

Create a new folder called `ViewModels` and add a new file called `MainViewModel.cs`:

```csharp
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Runtime.CompilerServices;
using Avalonia.Data;

namespace OutpatientDoctorWorkstation.ViewModels
{
    public class MainViewModel : INotifyPropertyChanged
    {
        private ObservableCollection<Patient> _patients;

        public ObservableCollection<Patient> Patients
        {
            get => _patients;
            set => RaiseAndSetIfChanged(ref _patients, value);
        }

        public MainViewModel()
        {
            // Initialize your collection with sample data
            Patients = new ObservableCollection<Patient>
            {
                new Patient { Id = 1, Name = "John Doe", Gender = "Male", Age = 30 },
                // Add more patients
            };
        }

        public event PropertyChangedEventHandler PropertyChanged;

        protected void OnPropertyChanged([CallerMemberName] string propertyName = null)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }

        protected bool RaiseAndSetIfChanged<T>(ref T field, T value, [CallerMemberName] string propertyName = null)
        {
            if (EqualityComparer<T>.Default.Equals(field, value)) return false;
            field = value;
            OnPropertyChanged(propertyName);
            return true;
        }
    }
}
```

### Step 5: Create the Views

In the `Views` folder, create a new XAML file for the main window called `MainWindow.axaml`:

```xml
<Window xmlns="https://github.com/avaloniaui"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:vm="clr-namespace:OutpatientDoctorWorkstation.ViewModels"
        x:Class="OutpatientDoctorWorkstation.MainWindow"
        Title="Outpatient Doctor Workstation" Height="450" Width="800">
    <Design.DataContext>
        <vm:MainViewModel/>
    </Design.DataContext>
    <Grid>
        <ListBox Items="{Binding Patients}">
            <ListBox.ItemTemplate>
                <DataTemplate>
                    <StackPanel>
                        <TextBlock Text="{Binding Name}"/>
                        <TextBlock Text="{Binding Gender}"/>
                        <TextBlock Text="{Binding Age}"/>
                    </StackPanel>
                </DataTemplate>
            </ListBox.ItemTemplate>
        </ListBox>
    </Grid>
</Window>
```

### Step 6: Set the DataContext in the Code-Behind

In `MainWindow.axaml.cs`, set the `DataContext`:

```csharp
using Avalonia;
using OutpatientDoctorWorkstation.ViewModels;

namespace OutpatientDoctorWorkstation
{
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            DataContext = new MainViewModel();
        }
    }
}
```

### Step 7: Run the Application

Finally, run the application using the following command:

```shell
dotnet run
```

This will build and run your application, and you should see a window displaying a list of patients.

This is a very basic setup to get you started. The actual implementation of an outpatient doctor workstation system would involve more complex logic, such as database integration, more detailed patient information, appointment scheduling, medical records management, and so on. You would also need to implement additional ViewModels and Views for each feature of the system.


".NET" 和 ".NET Core" 是两个不同的概念，它们都是微软开发的软件开发框架，用于构建各种应用程序。以下是它们之间的主要区别：

1. **开放源代码和跨平台**：
   - **.NET Core**：是一个开源的、跨平台的框架，可以在Windows、Linux和macOS上运行。它是从.NET Framework演变而来，旨在提供更好的跨平台支持和开放的生态系统。
   - **.NET Framework**：是微软早期开发的一个封闭源代码的框架，主要用于Windows平台。它不支持跨平台运行。

2. **版本和演进**：
   - **.NET Core**：随着时间的推移，.NET Core经历了多个版本的更新，包括.NET Core 1.0、1.1、2.0、2.1、2.2、3.0和3.1。每个版本都带来了新的特性和改进。
   - **.NET Framework**：也有多个版本，如.NET Framework 4.6、4.7、4.8等，但它们主要是针对Windows平台的更新。

3. **性能和资源消耗**：
   - **.NET Core**：通常被认为比.NET Framework更轻量级，启动更快，资源消耗更少。
   - **.NET Framework**：由于历史悠久，可能在某些情况下资源消耗更多。

4. **API和库**：
   - **.NET Core**：虽然.NET Core旨在与.NET Framework兼容，但由于其跨平台的特性，某些API和库可能不完全相同。
   - **.NET Framework**：拥有更丰富的API和库，特别是在Windows特定的功能上。

5. **开发和部署**：
   - **.NET Core**：支持容器化部署，更容易在云环境和现代DevOps流程中使用。
   - **.NET Framework**：通常与Windows服务器和传统部署模式一起使用。

6. **未来方向**：
   - **.NET 5及以后版本**：从.NET Core演变而来，微软宣布.NET 5作为统一的.NET平台，取代了.NET Core和.NET Framework。.NET 5及后续版本旨在提供一个统一的运行时和框架，支持所有类型的应用程序，无论是桌面、移动、Web还是云。

总结来说，.NET Core是.NET Framework的一个现代化、跨平台的替代品，而.NET Framework是一个专为Windows设计的较旧框架。随着.NET 5及以后版本的推出，.NET Core和.NET Framework的区别将逐渐模糊，因为统一的.NET平台将包含两者的优点。


错误信息 `NETSDK1045` 表明你尝试使用当前的 .NET SDK 版本来构建一个针对 .NET 9.0 的项目，但是你的 SDK 版本不支持这个目标框架。.NET 9.0 目前还未发布，因此你需要确保你的项目是针对一个已发布的 .NET 版本。

要解决这个问题，你可以采取以下步骤：

1. **更新你的 .NET SDK**：
   如果你确实需要针对 .NET 9.0（或任何尚未发布的版本），请确保你使用的是最新版本的 .NET SDK。你可以访问提供的链接 [.NET 下载](https://aka.ms/dotnet/download) 来下载最新版本的 .NET SDK。

2. **修改项目文件**：
   如果你不打算使用 .NET 9.0，你需要修改你的项目文件（`.csproj`），将目标框架修改为一个已发布的版本。打开你的 `OutpatientDoctorWorkstation.csproj` 文件，找到 `<TargetFramework>` 标签，并将其值更改为一个支持的版本，比如 `net8.0` 或 `net7.0`（取决于你的项目需求和.NET的最新版本）。

   例如：
   ```xml
   <Project Sdk="Microsoft.NET.Sdk">
   
     <PropertyGroup>
       <TargetFramework>net8.0</TargetFramework> <!-- 修改为 net8.0 或更低版本 -->
     </PropertyGroup>
     
     <!-- 其他配置 -->
   
   </Project>
   ```

3. **运行恢复和构建**：
   在更新了 SDK 或修改了项目文件后，你需要在命令行中运行以下命令来恢复项目依赖并构建项目：

   ```shell
   dotnet restore
   dotnet build
   ```

请确保你使用的是正确的 .NET SDK 版本，并且你的项目文件中指定的目标框架与你的 SDK 版本兼容。如果你不确定当前安装的 SDK 版本，可以在命令行中运行 `dotnet --version` 来查看。如果你需要安装或更新 SDK，请按照下载页面上的指示操作。