查询嵌套的IEnumerable模型类-视图的组合模型有两个类

// 定义IEnumerable模型类
public class ModelA
{
    public int Id { get; set; }
    public string Name { get; set; }
    public IEnumerable<ModelB> ModelBs { get; set; }
}

// 定义视图模型类
public class ViewModel
{
    public int Id { get; set; }
    public string Name { get; set; }
    public IEnumerable<ModelB> ModelBs { get; set; }
}

// 创建组合模型列表
List<ModelA> modelAs = new List<ModelA>
{
    new ModelA
    {
        Id = 1,
        Name = "ModelA 1",
        ModelBs = new List<ModelB>
        {
            new ModelB { Id = 1, Name = "ModelB 1" },
            new ModelB { Id = 2, Name = "ModelB 2" }
        }
    },
    new ModelA
    {
        Id = 2,
        Name = "ModelA 2",
        ModelBs = new List<ModelB>
        {
            new ModelB { Id = 3, Name = "ModelB 3" },
            new ModelB { Id = 4, Name = "ModelB 4" }
        }
    }
};

// 查询嵌套的IEnumerable模型类-视图的组合模型
IEnumerable<ViewModel> viewModels = modelAs.Select(modelA => new ViewModel
{
    Id = modelA.Id,
    Name = modelA.Name,
    ModelBs = modelA.ModelBs
});

// 输出结果
foreach (var viewModel in viewModels)
{
    Console.WriteLine($"ViewModel Id: {viewModel.Id}");
    Console.WriteLine($"ViewModel Name: {viewModel.Name}");
    foreach (var modelB in viewModel.ModelBs)
    {
        Console.WriteLine($"ModelB Id: {modelB.Id}");
        Console.WriteLine($"ModelB Name: {modelB.Name}");
    }
    Console.WriteLine();
}