net上传图片（取一张最新图片）

<form id="form1" runat="server">
<div>
 <asp:DataList ID="DataList1" runat="server">
<ItemTemplate>
 <img src="upimg/<%# DataBinder.Eval(Container.DataItem,"pic_name") %>" />
</ItemTemplate>
</asp:DataList></div>
</form>

//创建连接数据库字符串
string conn = "provider=Microsoft.Jet.OLEDB.4.0;Data source=" + Server.MapPath("App_Data/test.mdb");
OleDbConnection oleConnection = new OleDbConnection(conn);
try
{
//打开数据库连接
oleConnection.Open();
OleDbCommand cmd = new OleDbCommand("select top 1 [id],[pic_name],[introduced] from pic order by id DESC", oleConnection);
OleDbDataAdapter dpt = new OleDbDataAdapter(cmd);
DataSet ds = new DataSet();

dpt.Fill(ds);
DataList1.DataSource = ds;
DataList1.DataBind();
OleDbDataReader dr = cmd.ExecuteReader();
if (dr.Read())
{
Label1.Text = dr["introduced"].ToString();
}
}
finally
{
//关闭数据库
oleConnection.Close();
}