ADO.NET获取数据(DataSet)同时获取表的架构实例
(编辑：jimmy 日期: 2024/10/15 浏览：2)
普通的ADO.NET获取DataSet的写法如下：
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;
}
}
}
<"1.0" encoding="utf-8" "Default" connectionString="Data Source=.;Initial Catalog=EFDb;Integrated Security=true"/> </connectionStrings> </configuration>
这里需要获取DataTable的主键信息，调试时发现没有主键信息，而实际数据库中是有主键（Id）
此时需要给SqlDataAdapter设置属性MissingSchemaAction为System.Data.MissingSchemaAction.AddWithKey
修改后的SQLHelper为
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;
}
}
}
以上这篇ADO.NET获取数据(DataSet)同时获取表的架构实例就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持。