HTMLEditor类常用事件说明

1、HtmlEvent 事件：Html元素事件，HtmlEditor将容器内HTML中的所有事件统一冒泡到此事件中进行处理。在此事件的处理函数中可根据不同的事件类型进行不同的业务处理。

eg：

  /// <summary>
        /// 编辑器Html事件处理函数
        /// </summary>
        /// <param name="s"></param>
        /// <param name="e"></param>
        private void HtmlDesignEditorHtmlEvent(object s, HtmlEventArgs e)
        {

            if (e.Event == null)
            {
                return;
            }
            var sEventType = e.Event.EventType.ToLower();

            var isNeedToDealEvent = IsNeedToDealEvent(e);
            if (isNeedToDealEvent)
            {
                switch (sEventType)
                {
                    case "controlselect":
                        //_udfSelectedControl = e.Event.SrcElement;
                        break;

                    case "beforeeditfocus":
                        if (e.Event.SrcElement.tagName.ToLower() != "body")
                        {
                            e.Event.ReturnValue = false;
                            e.Event.CancelBubble = true;
                        }
                        break;
                    case "click":
                        {
                            e.Event.ReturnValue = false;
                            e.Event.CancelBubble = true;
                        }
                        break;
                    case "drop":
                        //DoDropEvent
                        DoDropEvent(e);

                        break;
                    case "dragover":
                        //DoDragOverEvent
                        break;
                    case "dragend":
                        //DoDragEndEvent
                        DoDragEndEvent(e);
                        break;
                    case "dragenter":
                        //DoDragEnter
                        DoDragEnterEvent(e);
                        break;
                    case "mouseover":
                        //DoMouseOverEvent
                        DoMouseOverEvent(e);
                        break;
                    case "mousemove":
                        //DoMouseMove
                        DoMouseMoveEvent(e);
                        break;
                    case "mousedown":
                        //DoMouseDown
                        MultiMouseDownEvent(e);
                        DoMouseDownEvent(e);
                        break;
                    case "mouseout":
                        //DoMouseOut
                        DoMouseOutEvent(e);
                        break;

                    case "mouseup":
                        //DoMouseUp

                        DoMouseUpEvent(e);
                        break;

                    case "mousewheel":
                        //DoMouseWheel
                        DoMouseWheelEvent(e);
                        break;

                    case "resizeend":
                        DoResizeEndEvent(e);
                        break;
                    case "resizestart":
                        DoResizeStartEvent(e);
                        break;
                    case "keydown":
                        break;
                    case "dblclick":
                        DoDblClickEvent(e);
                        break;
                    default:
                        DoFinish(e);
                        break;

                }

            }

        }

2、ContentChanged  事件：容器内容改变事件，此事件将会在容器内容更改后触发

 /// <summary>
        /// HTML编辑器内容改变事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void HtmlDesignEditorContentChanged(object sender, EventArgs e)
        {
            if (_isDoDragEnd || _isChangeHtml)
            {
                _behaviorManage.Clear();
                _behaviorManage.AddTableBehavior(htmlDesignEditor.DocumentHTML);
                _behaviorManage.AddToolTipBehavior(htmlDesignEditor.DocumentHTML);
                _behaviorManage.AddDateTimeBehavior(htmlDesignEditor.DocumentHTML);
                _isChangeHtml = false;
                _isDoDragEnd = false;
            }
            FindViewControls();
        }

3、BeforePaste 事件：内容粘贴前事件，此事件将在用户进行粘贴操作前触发，在此事件中可对粘贴的内容进行过滤整理，如处理从Word过来的数据，Excel过来的数据，清除吊不必要的内容等。

   /// <summary>
        /// HTML编辑器进行粘贴操作前处理函数，此事件可对需要粘贴的数据进行预处理
        /// </summary>
        /// <param name="s"></param>
        /// <param name="e"></param>
        private void HtmlDesignEditorBeforePaste(object s, BeforePasteArgs e)
        {
            if (Clipboard.ContainsText(TextDataFormat.Html))
            {
                e.Cancel = true;
                MemoryStream memoryStream = Clipboard.GetData("Html Format") as MemoryStream;
                if (memoryStream == null)
                {
                    return;
                }
                memoryStream.Position = 0;
                var vBytes = new byte[memoryStream.Length];
                memoryStream.Read(vBytes, 0, (int) memoryStream.Length);
                var sText = Encoding.UTF8.GetString(vBytes);
                IHTMLDocument2 doc = this.htmlDesignEditor.HtmlDocument2;
                IHTMLTxtRange sel = doc.GetSelection().createRange() as IHTMLTxtRange;
                var controlSel = doc.GetSelection().createRange() as IHTMLControlRange;
                var length = controlSel.GetLength();
                for (int i = 0; i < length;i++ )
                {
                    var control = controlSel.Item(i);

                }
                    if (sel == null)
                    {
                        return;
                    }



                var html = _coolPf.CreateHtml(sText);
                sel.pasteHTML(html);

                //idManager.AdjustmentElementID(Me.contentEditor.HtmlDocument2)
                //  behaviorManage.AddTableBehavior(contentEditor.DocumentHTML);

                IHTMLElementCollection elList = this.htmlDesignEditor.DocumentHTML.GetElementsByTagName("TABLE");
                foreach (IHTMLElement el in elList)
                {
                    el.SetAttribute("height", el.offsetHeight, 0);
                }
                elList = this.htmlDesignEditor.DocumentHTML.GetElementsByTagName("TR");
                foreach (IHTMLElement el in elList)
                {
                    el.SetAttribute("height", el.offsetHeight, 0);
                }
            }
        }

3、BeforeNavigate 事件，页面导航前事件，此事件将在页面进行导航跳转前触发，可在此事件中进行阻止跳转。