如何用SQL语言在C#中打印DataGridView中的选定行

// 假设你的DataGridView控件名为dataGridView1
foreach (DataGridViewRow row in dataGridView1.SelectedRows)
{
    // 获取选定行的数据
    string value1 = row.Cells["列名1"].Value.ToString();
    string value2 = row.Cells["列名2"].Value.ToString();
    // ...
    // 打印选定行的数据
    Console.WriteLine(value1 + " " + value2);
}

string query = "SELECT * FROM 表名 WHERE 列名1 = '" + value1 + "' AND 列名2 = '" + value2 + "'";

string connectionString = "数据库连接字符串";
using (SqlConnection connection = new SqlConnection(connectionString))
{
    connection.Open();
    SqlCommand command = new SqlCommand(query, connection);
    SqlDataReader reader = command.ExecuteReader();
    while (reader.Read())
    {
        // 读取查询结果
        string result1 = reader["列名1"].ToString();
        string result2 = reader["列名2"].ToString();
        // ...
        // 打印查询结果
        Console.WriteLine(result1 + " " + result2);
    }
    reader.Close();
}