类库.cs代码如下：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Data.OleDb;
/// <summary>
///Myclass 的摘要说明
/// </summary>
///
namespace test
{
public class superCnn
{
public OleDbConnection cnn;
private OleDbCommand cmd;
private OleDbDataReader datar;
public superCnn(string mdbFileName)
{
string _path = "~\\App_Data\\" + mdbFileName;
string str_conn = "Provider=Microsoft.Jet.OLEDB.4.0; Data Source="
+ System.Web.HttpContext.Current.Server.MapPath(_path);
//MapPath(_path);
cnn = new OleDbConnection(str_conn);
}
public void open() {
cnn.Open();
}
public void close()
{
cnn.Close();
}
public OleDbDataReader getDatar(string _sql) {
cmd = new OleDbCommand(_sql, cnn);
datar = cmd.ExecuteReader();
return datar;
}
}
}
.aspx代码如下：
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="superCnn_test.aspx.cs" Inherits="superCnn_test" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Button ID="btn_test" runat="server" Text="测试superCnn"
onclick="btn_test_Click" />
</div>
</form>
</body>
</html>
.aspx.cs代码如下：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using test;
using System.Data.OleDb;
public partial class superCnn_test : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void btn_test_Click(object sender, EventArgs e)
{
superCnn cnn = new superCnn("data.mdb");
cnn.open();
OleDbDataReader datar = cnn.getDatar("select * from T_IMGS");
while (datar.Read()) {
Response.Write(datar["img_url"].ToString()+"<br>");
}
cnn.close();
}
}
效果如下：
时间： 2024-10-12 17:17:11