Aspx代码：
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<%@ Register Assembly="DevExpress.Web.ASPxEditors.v11.1, Version=11.1.6.0, Culture=neutral, PublicKeyToken=b88d1754d700e49a"
Namespace="DevExpress.Web.ASPxEditors" TagPrefix="dx" %>
<%@ Register Assembly="DevExpress.Web.ASPxHtmlEditor.v11.1, Version=11.1.6.0, Culture=neutral, PublicKeyToken=b88d1754d700e49a"
Namespace="DevExpress.Web.ASPxHtmlEditor" TagPrefix="dx" %>
<%@ Register Assembly="DevExpress.Web.ASPxSpellChecker.v11.1, Version=11.1.6.0, Culture=neutral, PublicKeyToken=b88d1754d700e49a"
Namespace="DevExpress.Web.ASPxSpellChecker" TagPrefix="dx" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<script type="text/javascript">
// <![CDATA[
var MailMessageTemplate = '<p>Hi,</p><p>Thanks, <br/>Serge<br/><br/>R&D, ASP.Net Team<br/>Developer Express Inc.<br/><br/>PS. If you wish to receive direct assistance from our Support Team, use Support Center at <a target="_blank" href="http://www.devexpress.com/Support/Center">http://www.devexpress.com/Support/Center</a></p>';
function PasteEmailTemplate(commandName) {
switch (commandName) {
case ('deleteall'):
HtmlEditor.ExecuteCommand(ASPxClientCommandConsts.SELECT_ALL, null);
HtmlEditor.ExecuteCommand(ASPxClientCommandConsts.PASTEHTML_COMMAND, ' ');
alert('fuck');
break;
case ('pastetemplate'):
HtmlEditor.ExecuteCommand(ASPxClientCommandConsts.SELECT_ALL, null);
HtmlEditor.ExecuteCommand(ASPxClientCommandConsts.PASTEHTML_COMMAND, MailMessageTemplate);
break;
}
}
</script>
<body>
<form id="form1" runat="server">
<div>
</br>
</br>
<dx:ASPxHtmlEditor ID="DemoHtmlEditor" runat="server" ClientInstanceName="HtmlEditor">
<Toolbars>
<dx:HtmlEditorToolbar Caption="DemoToolbar" Name="DemoToolbar">
<Items>
<dx:ToolbarUndoButton>
</dx:ToolbarUndoButton>
<dx:ToolbarRedoButton>
</dx:ToolbarRedoButton>
<dx:ToolbarJustifyLeftButton BeginGroup="True">
</dx:ToolbarJustifyLeftButton>
<dx:ToolbarJustifyCenterButton>
</dx:ToolbarJustifyCenterButton>
<dx:ToolbarJustifyRightButton>
</dx:ToolbarJustifyRightButton>
<dx:ToolbarJustifyFullButton>
</dx:ToolbarJustifyFullButton>
<dx:CustomToolbarButton CommandName="pastetemplate" ToolTip="Paste mail message template"
BeginGroup="true">
<Image Url="easyicon_cn_48.ico"></Image>
</dx:CustomToolbarButton>
<dx:CustomToolbarButton CommandName="deleteall" Text="Delete All" ToolTip="Delete all">
</dx:CustomToolbarButton>
</Items>
</dx:HtmlEditorToolbar>
</Toolbars>
<ClientSideEvents CustomCommand="function(s, e) { PasteEmailTemplate(e.commandName); }">
</ClientSideEvents>
</dx:ASPxHtmlEditor>
<br />
<br />
</div>
</form>
</body>
</html>
- 在EditorToolBar中添加<dx:CustomToolbarButton CommandName="deleteall" Text="Delete All" ToolTip="Delete all"></dx:CustomToolbarButton> 其中CommandName指定按钮的事件名称（客户端事件，预处理服务器端事件，可以借助ajax思想），Text指定按钮上的文字
- 注册事件：在ToolBar后面添加如下代码注册事件
<ClientSideEvents CustomCommand="function(s, e) { PasteEmailTemplate(e.commandName); }"></ClientSideEvents>
- 定义事件：是Javascript的脚本事件
function PasteEmailTemplate(commandName) {
switch (commandName) {
case ('deleteall'):
HtmlEditor.ExecuteCommand(ASPxClientCommandConsts.SELECT_ALL, null);//先全选
HtmlEditor.ExecuteCommand(ASPxClientCommandConsts.PASTEHTML_COMMAND, ' ');//替换成 
break;
case ('pastetemplate'):
HtmlEditor.ExecuteCommand(ASPxClientCommandConsts.SELECT_ALL, null);//全选
HtmlEditor.ExecuteCommand(ASPxClientCommandConsts.PASTEHTML_COMMAND, MailMessageTemplate);//替换为想要的字。 定义方式：var MailMessageTemplate=”………”(js)
break;
}
}