c# - C#中的SQL从数据库中选择

Question

我在 C# 中有以下代码:

string query = "SELECT * FROM Zboruri WHERE cod_aeroport = " + country;

using (var command = new SqlCommand(query, connection))
{
    var list = new ArrayList();
    var reader = command.ExecuteReader();

    if (reader.HasRows)
    {
         while (reader.Read())
         {
             string data1 = reader.GetString(1);
             string data2 = reader.GetString(2);
             list.Add(cod_aeroport);
             list.Add(data1);
             list.Add(data2);
         }
    }
    else
    {
        string raspuns = "nu este info";
        list.Add(raspuns);
    }

    reader.Close();
    connection.Close();
    return list;
 }

我的数据库表有这些列:

data1(numeric(18,0))
data2(numeric(18,0))
...........

它给我错误:

Index was outside the bounds of the array.

在这行代码中:

string data2 = reader.GetString(2); 

如何修复错误？

Answer 1

索引从 0 开始，而不是 1

string data1 = reader.GetString(0);
string data2 = reader.GetString(1);