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抢先式多线程网络蜘蛛

框架 // Copyright(C) 2017 铭飞科技 // #region 版权信息 /* * 此文件自 Copyright(C) 2008 - 2017 铭飞科技 Classification:无 开源网站:http://www.http://www. coding */ #endregion using System; using System.Data; using System.Web.UI; using System.Web.UI.WebControls; using System.Collections; using System.Collections.Generic; using System.Collections.Specialized; namespace Web.Templates.UI { ///

/// 标签树控件 /// public class Tree : System.Web.UI.WebControls.TreeView { private string _styleName = ""; /// /// 样式 /// /// The name of the style. public string StyleName { get { return _styleName; } set { _styleName = value; } } private string _checkedValue = ""; /// /// 默认选中当前值 /// /// The checked value. public string CheckedValue { get { return _checkedValue; } set { _checkedValue = value; } } private string _checkBoxName = ""; /// /// 复选框名称 /// /// The check box name. public string CheckBoxName { get { return _checkBoxName; } set { _checkBoxName = value; } } private int _checkParentType = -1; /// /// /// /// The type of the check parent. public int CheckParentType { get { return _checkParentType; } set { _checkParentType = value; } } private int _checkChildType = -1; /// /// /// /// The type of the check child. public int CheckChildType { get { return _checkChildType; } set { _checkChildType = value; } } private string _showLevel = "999"; /// /// 显示层级 /// /// The show level. public string ShowLevel { get { return _showLevel; } set { _showLevel = value; } } private string _valueField = "id"; /// /// 编号字段名 /// /// The value field. public string ValueField { get { return _valueField; } set { _valueField = value; } } private string _textField = "title"; /// /// 显示字段名 /// /// The text field. public string TextField { get { return _textField; } set { _textField = value; } } private string _fatherField = "parentid"; /// /// 父编号字段名 /// /// The father field. public string FatherField { get { return _fatherField; } set { _fatherField = value; } } private TreeNodeBindEventHandler _onBind; /// /// 构建事件 /// /// The on bind event. public event TreeNodeBindEventHandler OnBind { add { _onBind += value; } remove { _onBind -= value; } } private DataTable _dataSource; /// /// 数据源 /// /// The data source. public DataTable DataSource { get { return _dataSource; } set { _dataSource = value; } } /// /// 绑定数据 /// public override void DataBind() { this.Nodes.Clear(); this.ShowCheckBox = this.CheckBoxName != "" && this.CheckBoxName != null; if (_dataSource != null) { TreeNode root_node = new TreeNode(); root_node.Value = "-1"; root_node.Text = "根目录"; Nodes.Add(root_node); List root_list = new List(); for (int i = 0; i < _dataSource.Rows.Count; i++) { TreeNode node = new TreeNode(); DataRow dr = _dataSource.Rows[i]; node.Value = dr[_valueField].ToString(); node.Text = dr[_textField].ToString(); node.SelectAction = TreeNodeSelectAction.None; //node.Depth =int.Parse(_showLevel); if (_onBind != null) { _onBind(node); } if (dr[_fatherField].ToString() == "-1" || dr[_fatherField].ToString() == "0") { Nodes.Add(node); if (node.Value == _checkedValue) { node.Checked = true; } int has = 0; for (int j = 0; j < root_list.Count; j++) { if (root_list[j] == int.Parse(node.Value)) { has = 1; } } if (has == 0) { root_list.Add(int.Parse(node.Value)); } } else { TreeNode father_node = GetNode(root_node, dr[_fatherField].ToString()); if (father_node != null) { father_node.ChildNodes.Add(node); if (node.Value == _checkedValue) { node.Checked = true; } } } } //绑定事件,自动勾选父级节点 if (this.CheckParentType == 0 || this.CheckChildType == 0) { string enterjvice = ""; if (this.CheckParentType == 0) { enterjvice += "FatherChecked"; } if (this.CheckChildType == 0) { enterjvice += "ChildChecked"; } if (enterjvice != "" && this.Nodes.Count > 0) { this.Attributes.Add("onclick", "JscAutoCheckedNode(this,'" + enterjvice + "');"); } } } base.DataBind(); } /// /// 构建HTML /// /// The object that receives the server control content. protected override void Render(HtmlTextWriter writer) { string[] style_list = new string[] { "admin_tree", "data_tree", "input_tree", "menu_tree", "popmenu_tree" }; switch (_styleName) { case "menu_tree": this.ShowCheckBox = false; this.CssClass += " menu"; break; case "popmenu_tree": this.

Public @ 2023-02-24 22:25:29

百度spider介绍

1. 什么是BaiduspiderBaiduspider是百度搜索引擎的一个自动程序,它的作用是访问互联网上的网页,建立索引数据库,使用户能在百度搜索引擎中搜索到您网站上的网页。2. Baiduspider的user-agent是什么?百度各个产品使用不同的user-agent:产品名称对应user-agent网页搜索Baiduspider无线搜索Baiduspider图片搜索Baiduspide

Public @ 2022-01-17 15:38:44

遇Baiduspider抓取,反馈时间多久合适

进入移动时代,同学们肯定会发现,百度官方和各知名SEO大拿们都在不断强调一个词:速度!最重要的莫过于,从用户点击搜索结果到页面完全加载完毕,不可超过3秒,否则有可能被限制展现(因为百度做过测试,当页面在3秒以上还无法打开的话,用户会选择关闭该网页)。于是大家各种针对速度的问题也多了起来,在深圳VIP大讲堂中,我们看到了这样一个简单的对话:同学问:站点遇到百度蜘蛛抓取,应该在多长时间内给出反馈?时间

Public @ 2015-11-08 15:38:40

百度真假蜘蛛IP如何识别?判断百度蜘蛛的鉴别方法

很多SEO从业人员在刚刚接触这个行业的时候,经常会问——百度蜘蛛是什么?我们可以理解为百度蜘蛛就是用来抓取网站链接的IP,小编经常会听到百度蜘蛛来的太频繁,服务器要被抓爆了,如果你无法识别百度蜘蛛,你怎么知道是百度蜘蛛抓爆的呢?也有出现百度蜘蛛都不来了的情况,还有很多站点想得到百度蜘蛛的IP段,想把IP加入白名单,但无法识别百度IP。那怎么才能识别正确的百度蜘蛛呢?来来来,只需做着两点,就能正确识

Public @ 2010-10-11 16:22:32

蜘蛛程序(spider)

蜘蛛程序(spider)是一种按照一定规则自动地在互联网上检索和获取信息的计算机程序。蜘蛛程序的工作方式类似于蜘蛛在网上爬行,它通过网络链接搜索引擎等目标网站的页面,并按照预先设定的算法和规则提取所需的信息。 蜘蛛程序主要用于搜索引擎的建立与维护,它们能够自动化地获取大量的网页内容,并将其存储在搜索引擎的数据库中。蜘蛛程序可以按照用户设定的关键词和搜索模式来搜索相关的网页,然后将搜索结果进行分析

Public @ 2023-07-24 14:00:31

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