public class OleDbHelper
{
public OleDbHelper() { }
private static OleDbConnection Conn;
private static OleDbCommand Cmd;
private static OleDbDataAdapter Da;
private static DataSet Ds;
private static DataTable Dt;
private static string strConn = "Provider=Microsoft.Jet.OleDb.4.0;Data Source="
+ System.Web.HttpContext.Current.Server.MapPath(ConfigurationManager.ConnectionStrings["Conn"].ToString());
/* Web.Config配置
<connectionStrings>
<!--數據庫連接字符-->
<add name="ConnStr" connectionString="~/App_Data/Data.mdb"/>
</connectionStrings>
*/
/// <summary>
/// 打開連接
/// </summary>
public static void Open()
{
Conn = new OleDbConnection();
Cmd = new OleDbCommand();
if (Conn.State.Equals(ConnectionState.Closed))
{
Conn.ConnectionString = strConn;
Conn.Open();
}
Cmd.Connection = Conn;
}
/// <summary>
/// 關閉連接
/// </summary>
public static void Close()
{
if (Conn.State.Equals(ConnectionState.Open))
{
Conn.Close();
Conn.Dispose();
}
}
/// <summary>
/// 執行ExecuteNonQuery()
/// </summary>
/// <param name="sql">SQL語句</param>
/// <returns></returns>
public static int ExecuteCmd(string sql)
{
try
{
Open();
Cmd.CommandText = sql;
return Cmd.ExecuteNonQuery();
}
catch (Exception e)
{
throw new Exception(e.Message, e);
}
finally
{
Close();
}
}
/// <summary>
/// DataSet類
/// </summary>
/// <param name="sql">SQL語句</param>
/// <returns></returns>
public static DataSet GetDataSet(string sql)
{
try
{
Open();
Cmd.CommandText = sql;
Da = new OleDbDataAdapter();
Da.SelectCommand = Cmd;
Ds = new DataSet();
Da.Fill(Ds);
return Ds;
}
catch (Exception e)
{
throw new Exception(e.Message, e);
}
finally
{
Close();
}
}
/// <summary>
/// DataTable 類
/// </summary>
/// <param name="sql">SQL語句</param>
/// <returns></returns>
public static DataTable GetDataTable(string sql)
{
try
{
Open();
Cmd.CommandText = sql;
Da = new OleDbDataAdapter();
Da.SelectCommand = Cmd;
Dt = new DataTable();
Da.Fill(Dt);
return Dt;
}
catch (Exception e)
{
throw new Exception(e.Message, e);
}
finally
{
Close();
}
}
/// <summary>
/// 執行 ExecuteScalar
/// </summary>
/// <param name="sql">SQL語句</param>
/// <returns></returns>
public static int ExecuteScalar(string sql)
{
try
{
Open();
Cmd.CommandText = sql;
return (int)Cmd.ExecuteScalar();
}
catch (Exception e)
{
throw new Exception(e.Message, e);
}
finally
{
Close();
}
}
}
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title></title>
<style type="text/css">
body{font-size:12px;font-family:宋體;}
span{font-weight:bold;}
a{color:green;}
a:hover{ color:Blue;}
</style>
<script type="text/javascript">
function getID(id) {
return document.getElementById(id);
}
//列表
function listpage() {
var rep = "";
var list = CheckDelete._Default.get_list().value;
for (var i = 0; i < list.length; i++) {
rep += list[i].name + " <input name=" + list[i].id + " type='checkbox' value=" + list[i].name + " > <br/> ";
}
getID("str").innerHTML = rep;
}
// 全選
function checkall() {
var all = document.getElementsByTagName("input");
for (var i = 0; i < all.length; i++) {
if (all[i].type == "checkbox") {
all[i].checked = true;
}
}
}
//反選
function checknull() {
var all = document.getElementsByTagName("input");
for (var i = 0; i < all.length; i++) {
if (all[i].type == "checkbox") {
all[i].checked = false;
}
}
}
//刪除
function deleteAll() {
var all = document.getElementsByTagName("input");
if (confirm('確定刪除?')) {
for (var i = 0; i < all.length; i++) {
if (all[i].checked) {
CheckDelete._Default.deleteall(all[i].name);
}
}
listpage()
}
}
//添加
function insert() {
CheckDelete._Default.insert();
listpage();
}
</script>
</head>
<body onload="listpage();">
<form id="form1" runat="server">
<div>
<br />
<div id="str"></div>
<input id="Button1" type="button" value="全選" onclick="checkall()" />
<input id="Button2" type="button" value="反選" onclick="checknull()" />
<input id="Button3" type="button" value="刪除" onclick="deleteAll()" />
<input id="Button4" type="button" value="添加10條記錄" onclick="insert()" />
</div>
</form>
</body>
</html>
namespace CheckDelete
{
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
AjaxPro.Utility.RegisterTypeForAjax(typeof(_Default));
}
//列表
[AjaxPro.AjaxMethod]
public List<Model> get_list()
{
string sql = "select * from [Book]";
DataTable Dt = OleDbHelper.GetDataTable(sql);
List<Model> list = new List<Model>();
foreach (DataRow Dr in Dt.Rows)
{
Model mode = new Model();
mode.id = Convert.ToInt32(Dr["id"]);
mode.name = Dr["name"].ToString();
list.Add(mode);
}
return list;
}
//刪除
[AjaxPro.AjaxMethod]
public void deleteall(string id)
{
string sql = "delete from [Book] where id=" + id;
CheckDelete.OleDbHelper.ExecuteCmd(sql);
}
//無刷新添加數據
[AjaxPro.AjaxMethod]
//由於使用的通用的數據庫操作類,循環的時候,循環幾次就打開幾次數據庫連接,性能很差,實際項目開發應用時,建議重新寫數據操作類
//只打開一次數據庫連接,循環執行完畢後再關閉連接
public void insert()
{
for (int i = 0; i < 10; i++)
{
string sql = "insert into [Book](name) values('最新書籍" + i.ToString() + "')";
CheckDelete.OleDbHelper.ExecuteCmd(sql);
}
}
}
public class Model
{
private int _id;
private string _name;
public int id
{
get { return _id; }
set { _id = value; }
}
public string name
{
get { return _name; }
set { _name = value; }
}
}
}
