知识大全 Asp.net 2.0 自定义控件开发

Posted 2022-07-21 知

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　　（一）概述

　　控件名称工具栏控件分为主菜单和子菜单部分涉及到公司代码版权目前版本不是最终版本且去除了一些代码后面可下载的仅为纯控件开发技术相关代码通过扩展可以任意定制需要的功能里面一些设计思想也具有参考价值

　　（二）控件运行效果截图

　　默认样式和自定义样式

　　项集合编辑器

(三) 代码部分

　　主控件类ToolButton代码:

　　 /// <summary> /// Author: 【金鹰】【专注于DotNet技术】【ChengKing(ZhengJian)】 /// Blog: Http:///ChengKing /// </summary> using System; using System Collections Generic; using System ComponentModel; using System Text; using System Web; using System Web UI; using System Web UI WebControls; using System Web UI HtmlControls; using System IO; using System Drawing; namespace ToolButton [DefaultProperty( Text )] [ToolboxData( < :ToolButton runat=server></ :ToolButton> )] public class ToolButton : CompositeControl INamingContainer #region 内部变量 //含下拉箭头单元格的ID private string tcDownID = ; //本控件的ID private string tbID = ; #endregion #region 属性 /// <summary> /// 设置或获取显示的文本 /// </summary> [Bindable(true)] [Category( Appearance )] [DefaultValue( [按钮文本] )] [Localizable(true)] [Description( 显示的文本 )] public string Text get string s = (string)ViewState[ Text ]; return ((s == null) ? String Empty : s); set ViewState[ Text ] = value; /// <summary> /// 设置或获取图片路径 /// </summary> [Bindable(true)] [Category( Appearance )] [DefaultValue( NoPic gif )] [Localizable(true)] [Description( 显示图像的文件名 )] public string ImageName get String s = (String)ViewState[ ImageName ]; return ((s == null) ? String Empty : s); set ViewState[ ImageName ] = value; /// <summary> /// 设置或获取图片文件夹目录 /// </summary> [Bindable(true)] [Category( 客户端路径 )] [DefaultValue( )] [Localizable(true)] [Description( 资源(image/css/js)的客户端根目录 )] public string ClientPath get String s = (String)ViewState[ ClientPath ]; return ((s == null) ? String Empty : s); set ViewState[ ClientPath ] = value; /// <summary> /// 设置或获取点击按钮执行的命令(点击大按钮执行的命令) /// </summary> [Bindable(true)] [Category( 行为 )] [DefaultValue( )] [Localizable(true)] [Description( 点击控件执行的命令字串 )] public string Command get string s = (string)ViewState[ Command ]; return ((s == null) ? String Empty : s); set ViewState[ Command ] = value; private PopupMenu _Items = new PopupMenu(); /// <summary> /// 获取子菜单集合 /// </summary> [PersistenceMode(PersistenceMode InnerDefaultProperty)] [DesignerSerializationVisibility(DesignerSerializationVisibility Content)] [Description( 获取或设置下拉子菜单项集合 )] [Category( 杂项 )] [NotifyParentProperty(true)] [TypeConverter(typeof(CollectionConverter))] [DesignOnly(false)] public PopupMenu Items get if (_Items == null) _Items = new PopupMenu(); return _Items; /// <summary> /// 设置或获取子菜单集合句柄 /// </summary> [Browsable(false)] [Description( 获取或设置菜单 )] public PopupMenu Menu get return _Items; set this _Items Clear(); foreach (PopupMenuItem item in value) this _Items Add(item); [Browsable(true)] [Category( CSS样式 )] [Description( 获取或设置主控件的OnMouseOver样式 )] public string CSS_MAIN_ONMOUSEOVER_CLASSNAME get string s = (string)ViewState[ CSS_MAIN_ONMOUSEOVER ]; return ((s == null) ? String Empty : s); set ViewState[ CSS_MAIN_ONMOUSEOVER ] = value; [Browsable(true)] [Category( CSS样式 )] [Description( 获取或设置主控件的OnMouseOut样式 )] public string CSS_MAIN_ONMOUSEOUT_CLASSNAME get string s = (string)ViewState[ CSS_MAIN_ONMOUSEOUT ]; return ((s == null) ? String Empty : s); set ViewState[ CSS_MAIN_ONMOUSEOUT ] = value; [Browsable(true)] [Category( CSS样式 )] [Description( 获取或设置下拉款项的OnMouseOver样式 )] public string CSS_SUBITEM_ONMOUSEOVER_CLASSNAME get string s = (string)ViewState[ CSS_SUBITEM_ONMOUSEOVER ]; return ((s == null) ? String Empty : s); set ViewState[ CSS_SUBITEM_ONMOUSEOVER ] = value; [Browsable(true)] [Category( CSS样式 )] [Description( 获取或设置下拉款项的OnMouseOut样式 )] public string CSS_SUBITEM_ONMOUSEOUT_CLASSNAME get string s = (string)ViewState[ CSS_SUBITEM_ONMOUSEOUT ]; return ((s == null) ? String Empty : s); set ViewState[ CSS_SUBITEM_ONMOUSEOUT ] = value; #endregion #region 构造函数 /// <summary> /// 构造函数 /// </summary> public ToolButton() //设置一套默认风格 this BackColor = Color FromName( MenuBar );//ViewState[ BackColor ] = Color FromName( MenuBar ); ViewState[ Text ] = [按钮文本] ; //ViewState[ ClientPath ] = ToolButtonImages ; ViewState[ ImageName ] = NoPic gif ; this BorderStyle = BorderStyle NotSet;//ViewState[ BorderStyle ] = BorderStyle NotSet; this BorderWidth = Unit Pixel( );//ViewState[ BorderWidth ] = Unit Pixel( ); this BorderColor = Color FromName( ControlDark );//ViewState[ BorderColor ] = Color FromName( ControlDark ); this Height = Unit Pixel( );//ViewState[ Height ] = Unit Pixel( ); //this Width = Unit Pixel( );] #endregion #region 方法 protected override void Render(HtmlTextWriter writer) //base Render(writer); PrepareControlForRendering(); base RenderContents(writer); /// <summary> /// 设置控件树的样式和客户端事件 /// </summary> private void PrepareControlForRendering() if (this Controls Count < ) return; bool IsCustomStyle = CSS_MAIN_ONMOUSEOVER_CLASSNAME != String Empty && CSS_MAIN_ONMOUSEOUT_CLASSNAME != String Empty; Table t = (Table)this Controls[ ]; t CellPadding = ; t CellSpacing = ; t Style Add( Cursor default ); t CopyBaseAttributes(this); t Height = this Height; t Width = this Width; t BorderStyle = this BorderStyle; t BorderWidth = Unit Pixel( ); t Attributes Add( onselectstart return false; ); //t Style Add( aligh left ); //t Style Add( table layout fixed ); //t Style Add( word wrap break word ); //***display:inline block ); //if (CSS_MAIN_ONMOUSEOVER_CLASSNAME != String Empty && CSS_MAIN_ONMOUSEOUT_CLASSNAME != String Empty) // // t CssClass = this CSS_MAIN_ONMOUSEOUT_CLASSNAME; // t Attributes Add( onmouseenter ChangeClassName(this + CSS_MAIN_ONMOUSEOVER_CLASSNAME + ) ); // t Attributes Add( onmouseleave ChangeClassName(this + CSS_MAIN_ONMOUSEOUT_CLASSNAME + ) ); // if (t Rows Count > ) TableRow tr = t Rows[ ]; //if (IsCustomStyle == false) // tr BorderWidth = Unit Pixel( ); // ////应用用户定义样式 //if (IsCustomStyle) // // tr CssClass = this CSS_MAIN_ONMOUSEOUT_CLASSNAME; // tr Attributes Add( onmouseenter ChangeClassName(this + CSS_MAIN_ONMOUSEOVER_CLASSNAME + ) ); // tr Attributes Add( onmouseleave ChangeClassName(this + CSS_MAIN_ONMOUSEOUT_CLASSNAME + ) ); // for (int i = ; i < tr Cells Count; i++) TableCell tc = tr Cells[i]; //tc Style Add( align left ); if (IsCustomStyle == false) tc BorderColor = this BorderColor; tc BorderStyle = this BorderStyle; string strBorderWidth = int Parse(this BorderWidth Value ToString()) ToString(); //应用用户定义样式 if (IsCustomStyle) tc CssClass = this CSS_MAIN_ONMOUSEOUT_CLASSNAME; else tc CssClass = this CssClass; if (i == ) if (IsCustomStyle == false) tc BorderWidth = this BorderWidth; tc Style Add( border Width strBorderWidth + px px + strBorderWidth + px + strBorderWidth + px ); else tc Style Add( border Right Width px ); //固定Border width //tc Style Add( border Width px px px px ); if (this Command != null && this Command Length > ) string strCommand = this Command Trim() Replace( \\ ) Replace(   ); tc Attributes Add( onclick strCommand); if (IsCustomStyle == false) string str = Color FromName( LightGray ) ToString(); tc Attributes Add( onmouseenter this style borderStyle= inset ; this parentElement children( ) style borderStyle= inset ; ); tc Attributes Add( onmouseleave this style borderStyle= outset ;this parentElement children( ) style borderStyle= outset ; ); else tc Attributes Add( onmouseenter ChangeClassName(this + CSS_MAIN_ONMOUSEOVER_CLASSNAME + ); + ChangeClassName(this parentElement children( ) + CSS_MAIN_ONMOUSEOVER_CLASSNAME + ); ); tc Attributes Add( onmouseleave ChangeClassName(this + CSS_MAIN_ONMOUSEOUT_CLASSNAME + ); + ChangeClassName(this parentElement children( ) + CSS_MAIN_ONMOUSEOUT_CLASSNAME + ); ); //tc Style Add( border color red ); //tc Style Add( width ((System Web UI WebControls Image)tc Controls[ ]) Width ToString()); else if (i == ) if (IsCustomStyle == false) tc BorderWidth = this BorderWidth; tc Style Add( border Width strBorderWidth + px px + strBorderWidth + px px ); else tc Style Add( border Left Width px ); //固定Border width //tc Style Add( border Width px px px px ); if (this Command != null && this Command Length > ) string strCommand = this Command Trim() Replace( \\ ) Replace(   ); tc Attributes Add( onclick strCommand); if (IsCustomStyle == false) tc Attributes Add( onmouseenter this style borderStyle= inset ; this parentElement children( ) style borderStyle= inset ; ); tc Attributes Add( onmouseleave this style borderStyle= outset ;this parentElement children( ) style borderStyle= outset ; ); // tc CssClass = mainexit ; // tc Attributes Add( onmouseenter ChangeClassName(this mainfocus );ChangeClassName(this parentElement children( ) mainfocus ); ); // tc Attributes Add( onmouseleave ChangeClassName(this mainexit );ChangeClassName(this parentElement children( ) mainexit ); ); else tc Attributes Add( onmouseenter ChangeClassName(this + CSS_MAIN_ONMOUSEOVER_CLASSNAME + ); + ChangeClassName(this parentElement children( ) + CSS_MAIN_ONMOUSEOVER_CLASSNAME + ); ); tc Attributes Add( onmouseleave ChangeClassName(this + CSS_MAIN_ONMOUSEOUT_CLASSNAME + ); + ChangeClassName(this parentElement children( ) + CSS_MAIN_ONMOUSEOUT_CLASSNAME + ); ); if (IsCustomStyle == false) tc Font MergeWith(this Font); else if (i == ) if (IsCustomStyle == false) tc BorderWidth = this BorderWidth; else //固定Border width //tc Style Add( border Width px px px px ); if (IsCustomStyle == true) tc Attributes Add( onmouseenter ChangeClassName(this + CSS_MAIN_ONMOUSEOVER_CLASSNAME + ); ); tc Attributes Add( onmouseleave ChangeClassName(this + CSS_MAIN_ONMOUSEOUT_CLASSNAME + ); ); else tc Attributes Add( onmouseenter this style borderStyle= inset ; ); tc Attributes Add( onmouseleave this style borderStyle= outset ; ); //tc Style Add( border color red ); if (IsCustomStyle == false) tc ForeColor = this ForeColor; tc BackColor = this BackColor; if (tc ID == tcDownID) if (this Items Count > ) tc Attributes Add( onclick activeMenu( + this UniqueID + ); ); else tc Enabled = false; //tc Style Add( display none ); if (tc Parent Controls Count >= ) ((TableCell)tc Parent Controls[ ]) Style Add( border Right Width px ); /// <summary> /// 创建子控件的层次结构 /// </summary> protected override void CreateChildControls() Table t = new Table(); tbID = this UniqueID + _table ; t ID = tbID; TableRow tr = new TableRow(); t Rows Add(tr); TableCell tc_img = new TableCell(); if (this ClientPath != String Empty || this ImageName != String Empty) string strImageUrl = Path Combine(this ClientPath ToolButtonImages\\\\ + this ImageName); System Web UI WebControls Image image = new System Web UI WebControls Image(); image BorderWidth = Unit Pixel( ); image ImageUrl = strImageUrl; tc_img Controls Add(image); tr Cells Add(tc_img); TableCell tc_text = new TableCell(); tc_text Controls Add(new LiteralControl(   + this Text +   )); tr Cells Add(tc_text); TableCell tc_downmenu = new TableCell(); tcDownID = this UniqueID + tcDown ; tc_downmenu ID = tcDownID; tc_downmenu Controls Add(new LiteralControl( <font size= >▼</font> )); tr Cells Add(tc_downmenu); this Controls Add(t); base CreateChildControls(); //protected override void RenderContents(HtmlTextWriter writer) // // base RenderContents(writer); // /// <summary> /// 注册客户端脚本 /// </summary> /// <param name= e ></param> protected override void OnPreRender(EventArgs e) //引用JS文件 if (!Page ClientScript IsClientScriptBlockRegistered(this GetType() BuildMenu )) //string jsPath = clientPath + /Js/ + jsscript js ; Page ClientScript RegisterClientScriptBlock(this GetType() BuildMenu <script type=