IsPostBack:
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
this.username.Text = "";
this.userpwd.Text = "";
}
this.gb.Attributes.Add("onclick", "window.close()");
}
protected void dl_Click(object sender, EventArgs e)
{
if (username.Text == "admin" && userpwd.Text == "admin")
{
Response.Redirect("admin_index.aspx");
}
else
{
Response.Redirect("sb.aspx");
}
}
protected void qk_Click(object sender, EventArgs e)
{
this.username.Text = "";
this.userpwd.Text = "";
}
}
Request和Response:
public partial class _Default : System.Web.UI.Page
{
protected void Button1_Click1(object sender, EventArgs e)
{
int aa = int.Parse(Request.Form["pf"].ToString());
Response.Write("求平方的数是：" + aa + "<br>");
Response.Write(aa + "的平方是：" + aa * aa);
}
}
获取客户端的相关信息:
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
string ie=Request.UserAgent;//获取客户端浏览器
string ip = Request.UserHostAddress;//换取客户端IP地址
string ser = Request.PhysicalApplicationPath;//获取当前文件服务器物理路径
Response.Write(ie+"<br>"+ip+"<br>"+ser);
}
}
----
•public partial class Default2 : System.Web.UI.Page
•{
• protected void Page_Load(object sender, EventArgs e)
• {
• Application["hygl"] = "呵呵你来了啊难的啊";
• Response.Write(Application["hygl"]); //输出
• }
•}
聊天室应用:
• protected void Button1_Click(object sender, EventArgs e)
• {
• string mywords = Request["mywords "];
• Application.Lock(); //锁定
• Application["chat"] = Application["chat"] + "<br>" + mywords ;
• Response.Write(Application["chat"]);
• Application.UnLock(); //解锁
• }
网页计数器:
protected void Page_Load(object sender, EventArgs e)
{
Application.Lock();
Application["count"] = Convert.ToInt32(Application["count"]) + 1; //每次加1
Application.UnLock();
Response.Write("您是本站第" + Application["count"] + "位贵宾！");// 输出你是第多少位来看毛片!!!![]()
}
--取物理路径:
•
•protected void Page_Load(object sender, EventArgs e)
• {
• Response.Write("传回当前文件所在的物理路径：<BR>");
• Response.Write(Server.MapPath("."));
• }
//是不规则的编号为每一位用户分配一个ID:
• protected void Page_Load(object sender, EventArgs e)
• {
• Response.Write("您的随即编号为："+Session.SessionID);
• }
自定义属性:
• protected void Page_Load(object sender, EventArgs e)
• {
• Session["h"] = "欢迎！";
• Response.Write(Session["h"]);
• }
• <div> <a href=Default3.aspx>在另外一个页面查看</a> </div>
•以上代码为页面1中代码
自定义属性 （第二步）:
•protected void Page_Load(object sender, EventArgs e)
• {
• Response.Write(Session["h"]);
• }
•以上代码为页面2中代码
设置有效期和使Session失效:
•protected void Page_Load(object sender, EventArgs e)
• {
• Session.Timeout = 1;
• Session["h"] = "欢迎！";
• Response.Write(Session["h"]);
• Session.Abandon();
• }
• <div><a href=Default3.aspx>在另外一个页面查看</a></div>
Cookie对象: ![]()
![]()
•Cookie对象也可以保存客户信息，与Session 对象相似，分别保存不同用户的信息。
•和Session的区别是：Session对象所有信息保存在服务器上，Cookie对象所有信息保存在客户端的浏览器上
将信息保存到浏览器（第一步）:
• protected void Page_Load(object sender, EventArgs e)
• {
• HttpCookie mycookie = new HttpCookie("user");
• mycookie.Value = "asp.net入门";
• Response.Cookies.Add(mycookie);
• }
• <div> <a href=Default3.aspx>在另外一个页面查看</a> </div>
读取保存的信息（第二步）:
• protected void Page_Load(object sender, EventArgs e)
• {
• string mycook = Request.Cookies["user"].Value;
• Response.Write(mycook);
• }
•在新页面中实现以上代码
•
•