当前文件： XmlStudentSys/Default.aspx.cs[1K，2009-6-12 11:59:52]，打开代码结构图

		            
 1using System;
 2using System.Data;
 3using System.Configuration;
 4using System.Web;
 5using System.Web.Security;
 6using System.Web.UI;
 7using System.Web.UI.WebControls;
 8using System.Web.UI.WebControls.WebParts;
 9using System.Web.UI.HtmlControls;
10using System.Xml;
11using xmlOp;//引用自定义命名空间
12
13public partial class _Default : System.Web.UI.Page 
14...{
15    string xmlFile = "";
16    protected void Page_Load(object sender, EventArgs e)
17    ...{
18        btreg.Visible = false;
19        xmlFile = Request.PhysicalApplicationPath + @"\xml\students.xml";//配置文件的Xml文件路径
20    }
21    protected void bt1_Click1(object sender, EventArgs e)
22    ...{
23        string _username = tbusername.Text.Trim();
24        string _pwd = tbpassword.Text.Trim();
25        XmlOp op = new XmlOp(xmlFile);
26        //验证用户名和密码
27        if (op.SelectNode("//Root/Student", 0, _username) && op.SelectNode("//Root/Student", 1, _pwd))
28        ...{
29            Session["_username"] = _username;
30            Response.Redirect("show.aspx");
31        }
32        else
33        ...{
34            Msg("用户名或密码错误!或你还没注册！注册请点确定！");
35            btreg.Visible = true;
36        }
37    }
38    protected void bt2_Click(object sender, EventArgs e)
39    ...{
40        tbusername.Text = "";
41        tbpassword.Text = "";
42    }
43    //弹出对话框
44    public void Msg(string msg)
45    ...{
46        Page pg = (Page)HttpContext.Current.Handler;
47        string script = "alert('" + msg + "');";
48        pg.ClientScript.RegisterStartupScript(pg.GetType(), Guid.NewGuid().ToString(), script, true);
49    }
50    protected void btreg_Click(object sender, EventArgs e)
51    ...{
52        Response.Redirect("reg.aspx"); 
53    }
54}
55