具备界面基础功能

SHH.CameraDashboard/ViewModels/CameraEditViewModel.cs

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+using System.ComponentModel;
+using System.ComponentModel.DataAnnotations;
+using System.Runtime.CompilerServices;
+using System.Windows;
+using System.Windows.Input;
+
+namespace SHH.CameraDashboard
+{
+    public class CameraEditViewModel : INotifyPropertyChanged
+    {
+        // 编辑中的数据副本
+        private CameraEditInfo _editingDto;
+        
+        // 定义一个事件，通知 View 关闭窗口（或者 UserControl 所在的宿主）
+        public event Action<bool, CameraEditInfo> RequestClose;
+
+        public CameraEditInfo EditingDto
+        {
+            get => _editingDto;
+            set { _editingDto = value; OnPropertyChanged(); }
+        }
+
+        public ICommand SaveCommand { get; }
+        public ICommand CancelCommand { get; }
+
+        private bool _isAdd = false;
+
+        /// <summary>
+        /// 构造函数
+        /// </summary>
+        /// <param name="sourceDto">如果是编辑模式，传入源对象；如果是新增，传入 null</param>
+        public CameraEditViewModel(CameraEditInfo sourceDto = null)
+        {
+            // 初始化枚举列表
+            InitBrandOptions();
+
+            if (sourceDto != null)
+            {
+                // 编辑模式：深拷贝数据，避免直接修改源对象
+                EditingDto = CloneDto(sourceDto);
+            }
+            else
+            {
+                // 新增模式：创建默认对象
+                EditingDto = new CameraEditInfo 
+                { 
+                    Name = "新设备", 
+                    Port = 8000, 
+                    ChannelIndex = 1 
+                };
+            }
+
+            if (EditingDto.Id == 0)
+                _isAdd = true;
+
+            SaveCommand = new RelayCommand(ExecuteSave, CanSave);
+            CancelCommand = new RelayCommand(ExecuteCancel);
+        }
+
+        private bool CanSave(object obj)
+        {
+            // 简单验证：ID必须大于0，IP不能为空
+            if (EditingDto == null) return false;
+            return EditingDto.Id > 0 && !string.IsNullOrWhiteSpace(EditingDto.IpAddress);
+        }
+
+        private bool IsSaving;
+
+        private async void ExecuteSave(object obj)
+        {
+            if (IsSaving) return;
+
+            try
+            {
+                IsSaving = true; // 开启 Loading
+
+                bool isSuccess = false;
+
+                if (_isAdd)
+                {
+                    isSuccess = await ApiClient.Instance.Cameras.CreateCameraAsync(EditingDto, "摄像头-新增");
+                }
+                else
+                {
+                    isSuccess = await ApiClient.Instance.Cameras.UpdateCameraAsync(EditingDto, "摄像头-编辑");
+                    _isAdd = false;
+                }
+
+                // 1. 调用 Repository (ApiClient)
+                // 注意：这里调用的是我们刚才在 Repository 中定义的 UpdateCameraAsync
+                if (isSuccess)
+                {
+                    // 2. 成功：通知外部关闭面板，并刷新列表
+                    RequestClose?.Invoke(true, EditingDto);
+                }
+                else
+                {
+                    // 3. 失败：弹窗提示
+                    MessageBox.Show("保存失败，请检查服务节点日志。", "系统提示", MessageBoxButton.OK, MessageBoxImage.Error);
+                }
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show($"保存过程中发生异常：\n{ex.Message}", "系统错误", MessageBoxButton.OK, MessageBoxImage.Error);
+            }
+            finally
+            {
+                IsSaving = false; // 关闭 Loading
+            }
+        }
+
+        private void ExecuteCancel(object obj)
+        {
+            // false 表示取消操作
+            RequestClose?.Invoke(false, null);
+        }
+
+        /// <summary>
+        /// 手动深拷贝 DTO，防止引用传递导致界面未点保存就修改了列表
+        /// 生产环境建议用 AutoMapper 或 JSON 序列化实现
+        /// </summary>
+        private CameraEditInfo CloneDto(CameraEditInfo source)
+        {
+            return new CameraEditInfo
+            {
+                Id = source.Id,
+                Name = source.Name,
+                Brand = source.Brand,
+                Location = source.Location,
+                IpAddress = source.IpAddress,
+                Port = source.Port,
+                Username = source.Username,
+                Password = source.Password,
+                RenderHandle = source.RenderHandle,
+                ChannelIndex = source.ChannelIndex,
+                RtspPath = source.RtspPath,
+                MainboardIp = source.MainboardIp,
+                MainboardPort = source.MainboardPort,
+                StreamType = source.StreamType,
+                UseGrayscale = source.UseGrayscale,
+                EnhanceImage = source.EnhanceImage,
+                AllowCompress = source.AllowCompress,
+                AllowExpand = source.AllowExpand,
+                TargetResolution = source.TargetResolution
+            };
+        }
+
+        public event PropertyChangedEventHandler? PropertyChanged;
+        protected void OnPropertyChanged([CallerMemberName] string name = null) 
+            => PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(name));
+
+        // 1. 定义一个简单的内部类或结构，用于 ComboBox 显示
+        public class BrandOption
+        {
+            public string Label { get; set; } // 显示的文本 (Description)
+            public int Value { get; set; }    // 实际的值 (int)
+        }
+
+        // 2. 数据源属性
+        public List<BrandOption> BrandOptions { get; private set; }
+
+        private void InitBrandOptions()
+        {
+            // 遍历 DeviceBrand 枚举的所有值
+            BrandOptions = Enum.GetValues(typeof(DeviceBrand))
+                .Cast<DeviceBrand>()
+                .Select(e => new BrandOption
+                {
+                    // 获取 Description ("海康威视")
+                    Label = EnumHelper.GetDescription(e),
+                    // 获取 int 值 (1)
+                    Value = (int)e
+                })
+                .ToList();
+        }
+    }
+}