C# DataGridView (WinForm) 中的自定义绑定

Question

I have three classes

public class FeatureBook
{
        public string Id { get; set; }
        public String name { get; set; }
        public String type { get; set; }
}
public class Feature
{
        public String feature_id { get; set; }
        public String value { get; set; }
}
public class Human {
        public string Id { get; set; }
        public bool validated { get; set; }
        public List<Feature> features { get; set; }
        public override String ToString() => Id;
}

Human has List<Feature> . Feature is linked to FeatureBook by feature_id

And I have DataGridView.

How can I get something like in the picture:

Answer 1

First of all, for such of functionality, i'd use 2 datagridviews with master-detail relationship.

Second of all, if you would like to bind data to single datagridview, you need to convert Feature 's rows into columns. Here is complete sample (created with LinqPad ):

void Main()
{
    //create human list     
    List<Human> people = new List<Human>()
    {
        new Human(){Id = "H1", validated =false, features = new List<Feature>()
            {
                new Feature(){feature_id = "H1F1", value ="Feature 1"},
                new Feature(){feature_id = "H1F2", value ="Feature 2"}
            }},
        new Human(){Id = "H2", validated =false, features = new List<Feature>()
            {
                new Feature(){feature_id = "H2F1", value ="Feature 1"},
                new Feature(){feature_id = "H2F2", value ="Feature 2"},
                new Feature(){feature_id = "H2F3", value ="Feature 3"},
                new Feature(){feature_id = "H2F4", value ="Feature 4"},
                new Feature(){feature_id = "H2F5", value ="Feature 5"}
            }}
    };
    //create datatable
    DataTable dt = new DataTable();
    //add known columns (related to Human)
    dt.Columns.AddRange(new DataColumn[]
    {
        new DataColumn("Id", typeof(string)),
        new DataColumn("validated", typeof(string))
    });
    //get max. of futures
    int fc = people.Select(x=>x.features.Count).Max();
    //add columns related to Feature
    for(int i=0; i<fc; i++)
        dt.Columns.Add(new DataColumn($"Feature {i}"));
    //add data to datatable
    foreach(Human h in people)
    {
        //add Human details
        DataRow dr = dt.NewRow();
        dr["Id"] = h.Id;
        dr["validated"] = h.validated;
        //add Feature details
        for(int i=0; i<h.features.Count; i++)
        {
            Feature f = h.features[i];
            dr[$"Feature {i}"] = f.value;
        }
        dt.Rows.Add(dr);
    }
    //datatable is ready to use
    //dump its content ;)
    dt.Dump();
}

// Define other methods and classes here
public class FeatureBook
{
        public string Id { get; set; }
        public string name { get; set; }
        public string type { get; set; }
}
public class Feature
{
        public string feature_id { get; set; }
        public string value { get; set; }
}
public class Human
{
        public string Id { get; set; }
        public bool validated { get; set; }
        public List<Feature> features { get; set; }
        public override string ToString() => Id;
}

Note: there's few other ways to achieve that, but i wanted to show you the simplest way;)