asp.net visual web developer 第二天 之 mysql连接

Default.aspx对应的cs文件内容

mysql官网下载 mysql-connector-net ，目前版本6.4.5，安装好后，将安装目录下的mysql.data.dll拷贝到asp.web工程目录的Bin目录，在visual web developer或者vs2008里的解决方案里新建Bin目录并添加mysql.data.dll文件即可使用了(ususing MySql.Data.MySqlClient;)

1. MySqlConnection（）// mysql连接

2. MySqlCommand（）//sql命令：sql语句

3. ExecuteReader（） //读取结果，表内容

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Data;

using MySql.Data.MySqlClient;

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

{

public void MessageBox(string strText ,Page objPage)

{

string scriptStr,alertStr;

alertStr = "window.alert( ' "+strText+ " ') ";

scriptStr = " <script> "+alertStr+ " </script> ";

objPage.RegisterClientScriptBlock( "failure ",IidScript);

}

protected void Page_Load(object sender, EventArgs e)

{

string connStr = "server=127.0.0.1;uid=root;" + "pwd=123456;database=test;";

MySqlConnection conn = new MySqlConnection(connStr);

try

{

Response.Write("hello");

conn.Open();

//DataTable table = conn.GetSchema("MetaDataCollections");

//DataTable table = conn.GetSchema("UDF");

//DisplayData(table);

}

catch (MySql.Data.MySqlClient.MySqlException ex)

{

//出错情况下才会进入

switch (ex.Number)

{

case 0:

MessageBox("Cannot connect to server. Contact administrator",Page);

break;

case 1045:

MessageBox("Invalid username/password, please try again",Page);

break;

}

}

Response.Write("open database ok!");

MySqlCommand cmd = new MySqlCommand();

cmd.CommandText = "testtable";

cmd.Connection = conn;

cmd.CommandType = CommandType.TableDirect;

MySqlDataReader reader = cmd.ExecuteReader();

while (reader.Read())

{

Response.Write(reader[0] ); //第一字段

Response.Write(" " + reader[1] );
//第二字段

}

conn.Close();

} //end page_load()

}

//更多的数据库操作api参考mysql-connection-net安装包里的mysql.data.chm帮助文档