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由于使用ADO訪問Access數(shù)據(jù)庫會有緩存，這在隨機(jī)提取數(shù)據(jù)庫數(shù)據(jù)時(shí)，例如：sql="select top 10 Title,objectGuid from Document Order By Rnd(id)"，將得不到隨機(jī)記錄，下面的例子可以克服這一缺陷，實(shí)現(xiàn)數(shù)據(jù)庫的隨機(jī)讀取。

C#：

＜%@ Page Language="C#" %＞

＜!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"＞

＜script runat="server"＞

protected void Page_Load( object sender, EventArgs e )
{
Random rnd = new Random(unchecked((int)DateTime.Now.Ticks));
int intRandomNumber = rnd.Next();
string ConnectionString = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=　DataDirectory　aspxWeb.mdb;Persist Security Info=True";
string sql = "select top 10 Title,objectGuid from Document Order By Rnd(" + (-1 * intRandomNumber) + "*id)";
System.Data.OleDb.OleDbConnection cn = new System.Data.OleDb.OleDbConnection(ConnectionString);
cn.Open();
System.Data.OleDb.OleDbCommand cmd = new System.Data.OleDb.OleDbCommand(sql, cn);
System.Data.OleDb.OleDbDataReader dr = cmd.ExecuteReader(System.Data.CommandBehavior.CloseConnection);
GridView1.DataSource = dr;
GridView1.DataBind();
dr.Close();
cmd.Dispose();
cn.Dispose();
cn = null;

}
＜/script＞