从后面的代码执行select查询

Question

如何SELECT从我的Code Behind文件执行查询然后迭代它？

我想做这样的事情(只是一个简单的伪示例):

// SQL Server
var results = executeQuery("SELECT title, name FROM table");

foreach (var row in results)
{
    string title = row.title;
    string name = row.name;
}

我怎么能在代码中这样做？

Answer 1

像这样的东西:

 string queryString = 
    "SELECT OrderID, CustomerID FROM dbo.Orders;";
using (SqlConnection connection = new SqlConnection(
           connectionString))
{
    SqlCommand command = new SqlCommand(
        queryString, connection);
    connection.Open();
    SqlDataReader reader = command.ExecuteReader();
    try
    {
        while (reader.Read())
        {
            Console.WriteLine(String.Format("{0}, {1}",
                reader["OrderID"], reader["CustomerID"]));
        }
    }
}

来源:http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqlcommand.aspx

在connectionString将根据数据库的产品和认证机制使用(Windows验证,用户名/口令等)而变化.上面的示例假定您使用的是SQL Server.有关不同的完整列表ConnectionStrings,请访问http://www.connectionstrings.com/