ADO.NET获取数据(DataSet)同时获取表的架构实例

using System.Configuration;
using System.Data;
using System.Data.SqlClient;
public class SQLHelper
{
 private static readonly string ConnectionString = ConfigurationManager.ConnectionStrings["Default"].ConnectionString;
 public static DataSet GetDataSet(string sql)
 {
 using (SqlConnection conn =new SqlConnection(ConnectionString))
 {
 SqlCommand cmd = new SqlCommand(sql, conn);
 SqlDataAdapter adapter = new SqlDataAdapter(cmd);
 DataSet ds = new DataSet();
 conn.Open();
 adapter.Fill(ds);
 return ds;
 }
 }
}

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
 <connectionStrings>
 <add name="Default" connectionString="Data Source=.;Initial Catalog=EFDb;Integrated Security=true"/>
 </connectionStrings>
</configuration>

using System.Configuration;
using System.Data;
using System.Data.SqlClient;
public class SQLHelper
{
 private static readonly string ConnectionString = ConfigurationManager.ConnectionStrings["Default"].ConnectionString;
 public static DataSet GetDataSet(string sql)
 {
 using (SqlConnection conn =new SqlConnection(ConnectionString))
 {
 SqlCommand cmd = new SqlCommand(sql, conn);
 SqlDataAdapter adapter = new SqlDataAdapter(cmd);
 adapter.MissingSchemaAction = MissingSchemaAction.AddWithKey;
 DataSet ds = new DataSet();
 conn.Open();
 adapter.Fill(ds);
 return ds;
 }
 }
}