SqlConnection,SqlCommand,SqlDataAdaper的用法总结-白红宇

SqlConnection,SqlCommand,SqldataReader的用法总结:

希望对新手有所帮助!!!

using System;

using System.Data;

using System.Configuration;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

using System.Data.SqlClient;

public partial class _Default : System.Web.UI.Page

{

protected void Page_Load(object sender, EventArgs e)

{

//--------------------------------SqlConnection,SqlCommand,SqlDataAdaper的用法------------//

//下面的3种形式等价,如果你的数据库是Windows连接方法,直接把连接字符串改成"server=.;database=northwind;integrated security=true;"

//如果你的数据库是某个实例名,直接把"server=."改成"server=你的计算机名实例名"就可以了

//SqlConnection con = new SqlConnection("server=.;database=northwind;uid=sa;pwd=;");

//con.Open();

//SqlDataAdapter sda = new SqlDataAdapter("select * from customers", con);

//DataSet ds = new DataSet();

//sda.Fill(ds, "customers");

下面这5个语句等价

this.GridView1.DataSource = ds;

this.GridView1.DataSource = ds.Tables[0];

this.GridView1.DataSource = ds.Tables["customers"];

this.GridView1.DataSource = ds.Tables[0].DefaultView;

//this.GridView1.DataSource = ds.Tables["customers"].DefaultView;

//this.GridView1.DataBind();

//con.Close();

//SqlConnection con = new SqlConnection("server=.;database=northwind;uid=sa;pwd=;");

//con.Open();

//SqlCommand cmd = new SqlCommand("select * from customers", con);

//SqlDataAdapter sda = new SqlDataAdapter();

//sda.SelectCommand = cmd;

//DataSet ds = new DataSet();

//sda.Fill(ds, "customers");

//this.GridView1.DataSource = ds.Tables["customers"].DefaultView;

//this.GridView1.DataBind();

//con.Close();

//SqlConnection con = new SqlConnection("server=.;database=northwind;uid=sa;pwd=;");

//con.Open();

//SqlDataAdapter sda = new SqlDataAdapter();

//sda.SelectCommand = new SqlCommand("select * from customers", con);

//DataSet ds = new DataSet();

//sda.Fill(ds, "customers");

//this.GridView1.DataSource = ds.Tables["customers"].DefaultView;

//this.GridView1.DataBind();

//con.Close();

}以上四种方法都可以把数据库中的数据读出来,绑定到GridView控件!!!

本文转自terryli51CTO博客，原文链接： http://blog.51cto.com/terryli/519595，如需转载请自行联系原作者