search.aspx.cs

.net的一个很经典很普通的实例

using System;
using System.Data;
using System.Configuration;
using System.Collections;
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;
using System.IO;
using System.Globalization;
using System.Reflection;
public partial class search : System.Web.UI.Page, ICallbackEventHandler
{
	//该源码下载自www.51aspx.com(５１ａｓｐｘ．ｃｏｍ)

    protected void Page_Load(object sender, EventArgs e)
    {
        //从cookie中获取身份验证票信息
        string cookieName = FormsAuthentication.FormsCookieName;
        HttpCookie authCookie = Context.Request.Cookies[cookieName];


        if (authCookie != null)
        {
            div2.Visible = true;
            //解密
            FormsAuthenticationTicket authTicket = FormsAuthentication.Decrypt(authCookie.Value);
            Link.Text = authTicket.Name.ToString();
            LinkRole.Text = authTicket.UserData.ToString();

        }
        else
        { div2.Visible = false; }

        ImageButton1.Attributes.Add("onclick","getResult();return false;");
    }


    protected void Linkout_Click(object sender, EventArgs e)
    {
        System.Web.Security.FormsAuthentication.SignOut();

        string url = "List.aspx?category=" + Request.QueryString["category"];
        Context.Response.Redirect(url);
    }
    protected void login_Click(object sender, ImageClickEventArgs e)
    {
        if (txtid.Text != "" && txtpwd.Text != "")
        {
            string UserName = txtid.Text.Trim();
            string UserPwd = txtpwd.Text.Trim();

            DataVisit mydv = new DataVisit();//创建访问层的类
            if (mydv.Confirm(UserName, UserPwd))//验证用户是否合法
            {
                string UserRoles = mydv.GetRoles(UserName);//获取用户角色的字符串
                //建立身份验证票据对象
                FormsAuthenticationTicket Ticket = new FormsAuthenticationTicket(1, UserName, DateTime.Now, DateTime.Now.AddHours(1), false, UserRoles, "/");
                //加密序列化验证票为字符串
                string HashTicket = FormsAuthentication.Encrypt(Ticket);
                //创建cookie
                HttpCookie UserCookie = new HttpCookie(FormsAuthentication.FormsCookieName, HashTicket);
                //输出cookie
                Context.Response.Cookies.Add(UserCookie);
                // div2.Visible = true;
                string url = "List.aspx?category=" + Request.QueryString["category"];
                Context.Response.Redirect(url);




            }
            else
            {
                txtid.Text = "不正确！用户名或密码";

            }

        }
    }
    protected void register_Click(object sender, ImageClickEventArgs e)
    {
        Response.Redirect("Register.aspx");
    }
    protected void DataList1_ItemDataBound(object sender, DataListItemEventArgs e)
    {


        if (e.Item.ItemType == ListItemType.Footer)
        {
            ImageButton linkpre = (ImageButton)e.Item.FindControl("linkpre");
            ImageButton linknext = (ImageButton)e.Item.FindControl("linknext");
            DropDownList ddl = (DropDownList)e.Item.FindControl("DropDownList1");
            Label all = (Label)e.Item.FindControl("all");
            Label now = (Label)e.Item.FindControl("now");
            linknext.Enabled = false;
            linkpre.Enabled = false;

            int newpageIndex;
            if (!Page.IsPostBack)
            {
                newpageIndex = 0;//第一次加载时为第一页

            }
            else
            {
                if (result == null)//如果回调参数为空
                    Session["page"] = 0;//session保存当前页面号
                else
                {　　//由于回调结果在绑定事件之前　所以设置回调后的页面　保存在session中
                    string[] parts = result.Split('|');
                    string n = parts[1];
                    Session["page"] = n;
                }
                newpageIndex = Convert.ToInt32(Session["page"]); // 取出当前页面
            }

            if (newpageIndex > 0)
            {
                linkpre.Enabled = true;
                //设置回调事件
                linkpre.Attributes.Add("onclick", "setpageto(" + (newpageIndex - 1).ToString() + ");return false;");
            }
            if (newpageIndex < pds().PageCount - 1)
            {

                linknext.Enabled = true;
                //设置回调事件
                linknext.Attributes.Add("onclick", "setpageto(" + (newpageIndex + 1).ToString() + "); return  false;");
            }



            for (int i = 1; i <= pds().PageCount; i++)
            {
                ListItem item = new ListItem();
                item.Value = i.ToString();
                ddl.Items.Add(item);
            }
            ddl.Text = (newpageIndex + 1).ToString();
            ddl.Attributes.Add("onchange", "setpageto1(this); return  false;");

            now.Text = pds(newpageIndex + 1).CurrentPageIndex.ToString();
            all.Text = pds().PageCount.ToString();





        }


    }



    //返回一个可分页的数据源
    public PagedDataSource pds()
    {
        PagedDataSource pds = new PagedDataSource();

        DataVisit mydv = new DataVisit();


        DataTable mydt = mydv.seachFilm(TextBox1.Text,TextBox2.Text,TextBox3.Text,TextBox4.Text);

        pds.DataSource = mydt.DefaultView;
        pds.AllowPaging = true;
        int size = 9;
        pds.PageSize = size;
        pds.CurrentPageIndex = pds.CurrentPageIndex;
        return pds;
    }
    //根据一个传来的整数作为当前页码并返回分页后的数据员
    public PagedDataSource pds(int n)
    {
        PagedDataSource pds = new PagedDataSource();

        DataVisit mydv = new DataVisit();


        DataTable mydt = mydv.seachFilm(TextBox1.Text, TextBox2.Text, TextBox3.Text, TextBox4.Text);

        pds.DataSource = mydt.DefaultView;
        pds.AllowPaging = true;
        int size = 9;
        pds.PageSize = size;
        pds.CurrentPageIndex = n;
        return pds;
    }

    //绑定DataList
    public void bind(int n)
    {
        DataList1.DataSource = pds(n);
        DataList1.DataBind();

    }





    //回调方法
    public string result;
    public string GetCallbackResult()
    {
        string[] parts = result.Split('|');
        //搜索名为MethodName的方法
        MethodInfo method = this.GetType().GetMethod(parts[0]);

        //定义一个object数组用来保存参数
        object[] args = new object[parts.Length - 1];
        Array.Copy(parts, 1, args, 0,args.Length);

        return (string)method.Invoke(this, args);


    }
    public void RaiseCallbackEvent(string eventArgument)
    {
        result = eventArgument;
    }
    public string pageChange(string newIndex)
    {

        int n = Convert.ToInt32(newIndex);
        bind(n);
        return getRenderCode();
    }

    public string getRenderCode()
    {
        StringWriter write1 = new StringWriter(CultureInfo.InvariantCulture);
        HtmlTextWriter write2 = new HtmlTextWriter(write1);

        DataList1.RenderControl(write2);
        write2.Flush();
        write2.Close();

        return write1.ToString();

    }
    //查询回调方法
    public string filmResult(string index,string txt1,string txt2,string txt3,string txt4)
    {
        int n = Convert.ToInt32(index);
        TextBox1.Text = txt1.Trim();
        TextBox2.Text = txt2.Trim();
        TextBox3.Text = txt3.Trim();
        TextBox4.Text = txt4.Trim();
        if (TextBox1.Text == "")
            TextBox1.Text = "null";
        if (TextBox2.Text == "")
            TextBox2.Text = "null";
        if (TextBox3.Text == "")
            TextBox3.Text = "null";
        if (TextBox4.Text == "")
            TextBox4.Text = "null";
        bind(0);
        return getRenderCode();
    }
}