如何在 C# 中的 DataGridView 中呈现我的对象的内容？

Question

这是我的代码：

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;
}

我想在 DataGridView 控件中显示 RestaurantData 中包含的数据，它是 Restaurant 类的一个对象。首先，我想显示餐厅的 ID，然后是针对餐厅的投诉数量，使其看起来像这样（ID 在 A 列，名称在 B 列，依此类推）：

• 身份证姓名地址年龄日期
• 姓名地址年龄日期
• 姓名地址年龄日期

我过去对 DataGridView 的使用仅限于 dataGridView1.DataSource = (some array)。但是，这次我要呈现的信息显然不是数组，所以我被卡住了。

Answer 1

如果您想将列剔除到您自己的列表中，可以使用以下方法：

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;
}

如果您只想自动生成列，请尝试以下操作：

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;
}