本文整理汇总了C#中System.Data.SqlClient.SqlDataReader.GetOrdinal方法的典型用法代码示例。如果您正苦于以下问题：C# SqlDataReader.GetOrdinal方法的具体用法？C# SqlDataReader.GetOrdinal怎么用？C# SqlDataReader.GetOrdinal使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类System.Data.SqlClient.SqlDataReader的用法示例。
在下文中一共展示了SqlDataReader.GetOrdinal方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: ReadGetOrdinal
private static void ReadGetOrdinal(string connectionString)
{
string queryString = "SELECT DISTINCT CustomerID FROM dbo.Orders;";
using (SqlConnection connection =
new SqlConnection(connectionString))
{
SqlCommand command =
new SqlCommand(queryString, connection);
connection.Open();
SqlDataReader reader = command.ExecuteReader();
// Call GetOrdinal and assign value to variable.
int customerID = reader.GetOrdinal("CustomerID");
// Use variable with GetString inside of loop.
while (reader.Read())
{
Console.WriteLine("CustomerID={0}", reader.GetString(customerID));
}
// Call Close when done reading.
reader.Close();
}
}示例2: Main
//引入命名空间
using System;
using System.Data;
using System.Data.SqlClient;
class UsingColumnOrdinals
{
public static void Main()
{
SqlConnection mySqlConnection =new SqlConnection("server=(local)\\SQLEXPRESS;database=MyDatabase;Integrated Security=SSPI;");
SqlCommand mySqlCommand = mySqlConnection.CreateCommand();
mySqlCommand.CommandText = "SELECT TOP 5 ID, FirstName, LastName FROM employee " +
"ORDER BY ID";
mySqlConnection.Open();
SqlDataReader productsSqlDataReader = mySqlCommand.ExecuteReader();
int idPos = productsSqlDataReader.GetOrdinal("ID");
int firstNamePos = productsSqlDataReader.GetOrdinal("LastName");
int lastNamePos = productsSqlDataReader.GetOrdinal("FirstName");
while (productsSqlDataReader.Read())
{
Console.WriteLine("ID = " + productsSqlDataReader[idPos]);
Console.WriteLine("FirstName = " + productsSqlDataReader[firstNamePos]);
Console.WriteLine("LastName = " + productsSqlDataReader[lastNamePos]);
}
productsSqlDataReader.Close();
mySqlConnection.Close();
}
}