Page_Load事件---IsPostBack属性
aspx代码
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
aspx.cs代码
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack) //判断页面是否是第一次加载
{
this.textUserName.Text= " "; //将用户名框设置为空
this.textUserPwd.Text= " "; //将密码框设置为空
}
this.btnClose.Attributes.Add("onclick", "window.close();");//关闭按纽设置，相当于在aspx文件的asp:label中添加onclick="window.close();"
}
protected void btnLogin_Click(object sender, EventArgs e)
{
if (this.textUserName.Text == "zuo" && this.textUserPwd.Text == "zuo")
{
this.lblMessage.Text = "登录成功";
}
else
{
this.lblMessage.Text = "登陆失败";
}
}
protected void btnClear_Click(object sender, EventArgs e)
{
this.textUserName.Text = " "; //设置为空
this.textUserPwd.Text = " "; //设置为空
}
}
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