2 u011289515 u011289515 于 2013.07.03 12:01 提问

c#为什么老出现无法将QQmanagerDB.Item隐式转换为system.Array

CSDN移动问答

CSDN移动问答

public Array[] GetAll(string sql)
{
Array[] arr = new Array[100];
int i = 0;
try
{
SqlCommand command = new SqlCommand(sql,db.conn);
db.Open();
SqlDataReader reader = command.ExecuteReader();
while (reader.Read())
{
Item it = new Item();
it.ID = Convert.ToInt32(reader["ID"]);
it.Name = (reader["Name"]).ToString();
it.Level = (reader["Level"]).ToString();
it.Email = (reader["Email"]).ToString();
it.days = Convert.ToDouble(reader["days"]);
arr[i] = it;
i++;
}
}

page:

case 1:

                    string sql = "select * from Users";
                    Array[] arr = man.GetAll(sql);
                    Console.WriteLine("----------------------------------------------------------");
                    Console.WriteLine("编号\t昵称\t等级\t天数\t邮箱");
                    Console.WriteLine("----------------------------------------------------------");
                    foreach (Array item in arr)
                    {
                        if (item != null)
                        {
                            Console.WriteLine("{0}\t{1}\t{2}\t{3}\t{4}");
                        }
                        else
                        {
                           break;   
                        }
                        Console.WriteLine("----------------------------------------------------------");
                    }
                    break;
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