如何在C＃中的DataGridView中显示对象的内容？

Question

Here is my code:

void Main() {
    List<Restaurant> restaurants = new List<Restaurant>();
}

class Restaurant {
    public int Id;
    public List<Complaint> Complaints = new List<Complaints>();
}

class Complaint {
    public string Name;
    public string Address;
    public int Age;
    public DateTime ComplaintDate;
}

I'd like to present the data contained in RestaurantData, an object of class Restaurant, in the DataGridView control. First I'd like to show the Restaurant's ID, followed by the number of Complaints against the restaurant so that it looks something like this (where the ID is in column A, and the Name is in Column B, and so forth):

• ID Name Address Age Date
• Name Address Age Date
• Name Address Age Date

My past usage of DataGridView has been limited to dataGridView1.DataSource = (some array). However, the information I want to present this time is clearly not an array so I'm stuck.

Answer 1

If you want to cull the columns to your own list, something like this works:

private void AddColumns()
{
    dataGridView1.AutoGenerateColumns = false;
    DataGridViewTextBoxColumn ageColumn =
        new DataGridViewTextBoxColumn();
    ageColumn.Name = "Age";
    ageColumn.DataPropertyName = "Age";
    ageColumn.ReadOnly = true;

    DataGridViewTextBoxColumn nameColumn =
        new DataGridViewTextBoxColumn();
    nameColumn.Name = "Name";
    nameColumn.DataPropertyName = "Name";
    nameColumn.ReadOnly = true;

    DataGridViewTextBoxColumn addressColumn =
        new DataGridViewTextBoxColumn();
    addressColumn.Name = "Address";
    addressColumn.DataPropertyName = "Address";
    addressColumn.ReadOnly = true;

    DataGridViewTextBoxColumn dateColumn =
        new DataGridViewTextBoxColumn();
    addressColumn.Name = "Date";
    addressColumn.DataPropertyName = "Date";
    addressColumn.ReadOnly = true;

    dataGridView1.Columns.Add(ageColumn);
    dataGridView1.Columns.Add(nameColumn);
    dataGridView1.Columns.Add(addressColumn);
    dataGridView1.Columns.Add(dateColumn);

    var ds = (from r in restaurants
              from c in r.Complaints
              select new {Id = r.Id, Address =c.Address, Age = c.Age, Name = c.Name, Date = c.ComplaintDate}
             ).ToList();
    dataGridView1.DataSource = ds;
}

If you just want to autogenerate the columns try this:

private void AddColumns()
{
    dataGridView1.AutoGenerateColumns = true;

    var ds = (from r in restaurants
              from c in r.Complaints
              select new {Id = r.Id, Address =c.Address, Age = c.Age, Name = c.Name, Date = c.ComplaintDate}
             ).ToList();
    dataGridView1.DataSource = ds;
}