怎么获得sql查询中的数据？
数据库连接部分我会写，如下面，可是 怎么获得查询结果中的列的内容呢？比如“省份”中的内容？
string strconn = System.Configuration.ConfigurationManager.ConnectionStrings[ "LocalSqlServer "].ToString();
SqlConnection con = new SqlConnection(strconn);
string cmdstring = "SELECT id,名称, 省份 FROM hotel WHERE id = ' " + id + " ' ";
SqlCommand cmd = new SqlCommand(cmdstring, con);
con.Open();

[解决办法]
dataReader
dataSet
………………
请看msdn
[解决办法]
去看看SqlDataAdapter、SqlDataReader类。


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[解决办法]
using System;
using System.Data;
using System.Data.SqlClient;

class Program
{
static void Main()
{
string connectionString = GetConnectionString();
string queryString =
"SELECT CategoryID, CategoryName FROM dbo.Categories; ";
using (SqlConnection connection =
new SqlConnection(connectionString))
{
SqlCommand command = connection.CreateCommand();
command.CommandText = queryString;

try
{
connection.Open();

SqlDataReader reader = command.ExecuteReader();

while (reader.Read())
{
Console.WriteLine( "\t{0}\t{1} ",
reader[0], reader[1]);
}
reader.Close();
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
}

static private string GetConnectionString()
{
// To avoid storing the connection string in your code,
// you can retrieve it from a configuration file.
return "Data Source=(local);Initial Catalog=Northwind; "
+ "Integrated Security=SSPI ";
}
}