记录随机显示数据库的办法
记录随机显示数据库的办法
privatevoidPage_Load(objectsender,System.EventArgse)
{
intRecNO,MaxRecNO,MinRecNO;
Randomrandom=newRandom();
OleDbDataReaderodr;
OleDbConnectioncon=newOleDbConnection();
con.ConnectionString="Provider=Microsoft.Jet.OLEDB.4.0;DataSource="+Server.MapPath("data/WebFormTest.mdb");
con.Open();
OleDbCommandcmd=newOleDbCommand("selectMax(ProductID)asMaxProductID,Min(ProductID)asMinProductIDfromProducts",con);
odr=cmd.ExecuteReader();
odr.Read();
MaxRecNO=(int)odr["MaxProductID"];
MinRecNO=(int)odr["MinProductID"];
odr.Close();
RecNO=random.Next(MinRecNO,MaxRecNO);
cmd=newOleDbCommand("select*fromProductswhereProductID="+RecNO,con);
odr=cmd.ExecuteReader();
odr.Read();
Response.Write("产品名称："+odr["ProductID"]+"-"+odr["ProductName"]);
odr.Close();
con.Close();
}
{
intRecNO,MaxRecNO,MinRecNO;
Randomrandom=newRandom();
OleDbDataReaderodr;
OleDbConnectioncon=newOleDbConnection();
con.ConnectionString="Provider=Microsoft.Jet.OLEDB.4.0;DataSource="+Server.MapPath("data/WebFormTest.mdb");
con.Open();
OleDbCommandcmd=newOleDbCommand("selectMax(ProductID)asMaxProductID,Min(ProductID)asMinProductIDfromProducts",con);
odr=cmd.ExecuteReader();
odr.Read();
MaxRecNO=(int)odr["MaxProductID"];
MinRecNO=(int)odr["MinProductID"];
odr.Close();
RecNO=random.Next(MinRecNO,MaxRecNO);
cmd=newOleDbCommand("select*fromProductswhereProductID="+RecNO,con);
odr=cmd.ExecuteReader();
odr.Read();
Response.Write("产品名称："+odr["ProductID"]+"-"+odr["ProductName"]);
odr.Close();
con.Close();
}