如何从DataTable中填充C#中的Datagridview添加自定义列？

DataTable dataTable = new DataTable();
dataTable.Columns.Add("列名1", typeof(string));
dataTable.Columns.Add("列名2", typeof(int));
// 添加更多列...

// 假设使用SqlDataAdapter获取数据
string connectionString = "数据库连接字符串";
string query = "SELECT 列名1, 列名2 FROM 表名";
using (SqlConnection connection = new SqlConnection(connectionString))
{
    SqlDataAdapter adapter = new SqlDataAdapter(query, connection);
    adapter.Fill(dataTable);
}

DataGridView dataGridView = new DataGridView();
dataGridView.DataSource = dataTable;

DataGridViewColumn customColumn = new DataGridViewTextBoxColumn();
customColumn.HeaderText = "自定义列";
customColumn.Name = "CustomColumn";
dataGridView.Columns.Add(customColumn);