摘要：
string connstring="Data Source=192.168.1.131;Initial Catalog=test;User ID=hhl;Password=;";
myconn=new SqlConnection(connstring);
myconn.Open();
sql="select * from JT_Class";
mycmd=new SqlCommand(sql,myconn);
myreader=mycmd.ExecuteReader();
while(myreader.Read())
{
str+=myreader["title"].ToString()+"<br>";此处阅读全文