大概半年前，由于某个网站项目需要整合Discuz!NT，就粗略的用了一下。觉得里面的会员上传头像功能方便好用，而且支持摄像头，就把它的代码分离出来，以后用在需要的地方。

　　

　　用过Discuz!NT的朋友会知道，这个上传头像功能有两个版本，一个是 Flash版，另一个是 Silverlight版，这次主要是关于 Flash版。

　　要使用这个功能十分简单（最难地方才是那个Flash的代码）。

　　使用页面 Default.aspx 代码

            <% @ Page Language = " C# " AutoEventWireup = " true " CodeFile = " Default.aspx.cs " Inherits = " Avatar.Default " %>  <! 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 >  < script type ="text/javascript" >  function $(id) { return document.getElementById(id);

            } var userAgent = navigator.userAgent.toLowerCase(); var is_opera = userAgent.indexOf( ' opera ' ) != - 1 && opera.version(); var is_moz = (navigator.product == ' Gecko ' ) && userAgent.substr(userAgent.indexOf( ' firefox ' ) + 8 , 3 ); var is_ie = (userAgent.indexOf( ' msie ' ) != - 1 && ! is_opera) && userAgent.substr(userAgent.indexOf( ' msie ' ) + 5 , 3 ); var is_mac = userAgent.indexOf( ' mac ' ) != - 1 ; function AC_GetArgs(args, classid, mimeType) { var ret = new Object();

            ret.embedAttrs = new Object();

            ret.params = new Object();

            ret.objAttrs = new Object(); for ( var i = 0 ; i < args.length; i = i + 2 ) { var currArg = args[i].toLowerCase(); switch (currArg) { case " classid " : break ; case " pluginspage " : ret.embedAttrs[args[i]] = ' http://www.macromedia.com/go/getflashplayer ' ; break ; case " src " : ret.embedAttrs[args[i]] = args[i + 1 ]; ret.params[ " movie " ] = args[i + 1 ]; break ; case " codebase " : ret.objAttrs[args[i]] = ' http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=9,0,0,0 ' ; break ; case " onafterupdate " : case " onbeforeupdate " : case " onblur " : case " oncellchange " : case " onclick " : case " ondblclick " : case " ondrag " : case " ondragend " : case " ondragenter " : case " ondragleave " : case " ondragover " : case " ondrop " : case " onfinish " : case " onfocus " : case " onhelp " : case " onmousedown " : case " onmouseup " : case " onmouseover " : case " onmousemove " : case " onmouseout " : case " onkeypress " : case " onkeydown " : case " onkeyup " : case " onload " : case " onlosecapture " : case " onpropertychange " : case " onreadystatechange " : case " onrowsdelete " : case " onrowenter " : case " onrowexit " : case " onrowsinserted " : case " onstart " : case " onscroll " : case " onbeforeeditfocus " : case " onactivate " : case " onbeforedeactivate " : case " ondeactivate " : case " type " : case " id " : ret.objAttrs[args[i]] = args[i + 1 ]; break ; case " width " : case " height " : case " align " : case " vspace " : case " hspace " : case " class " : case " title " : case " accesskey " : case " name " : case " tabindex " : ret.embedAttrs[args[i]] = ret.objAttrs[args[i]] = args[i + 1 ]; break ; default : ret.embedAttrs[args[i]] = ret.params[args[i]] = args[i + 1 ];

            }

            }

            ret.objAttrs[ " classid " ] = classid; if (mimeType) {

            ret.embedAttrs[ " type " ] = mimeType;

            } return ret;

            } function AC_FL_RunContent() { var ret = AC_GetArgs(arguments, " clsid:d27cdb6e-ae6d-11cf-96b8-444553540000 " , " application/x-shockwave-flash " ); var str = '' ; if (is_ie && ! is_opera) {

            str += ' <object ' ; for ( var i in ret.objAttrs) {

            str += i + ' =" ' + ret.objAttrs[i] + ' " ' ;

            }

            str += ' > ' ; for ( var i in ret.params) {

            str += ' <param name=" ' + i + ' " value=" ' + ret.params[i] + ' " /> ' ;

            }

            str += ' </object> ' ;

            } else {

            str += ' <embed ' ; for ( var i in ret.embedAttrs) {

            str += i + ' =" ' + ret.embedAttrs[i] + ' " ' ;

            }

            str += ' ></embed> ' ;

            } return str;

            } </ script >  </ head >  < body >  < form id ="form1" runat ="server" >  < table cellspacing ="0" cellpadding ="0" >  < tbody >  < tr >  < th ></ th >  < td >  < div class ="avatararea" >  < p >< img id ="avatar" onerror ="this.οnerrοr=null;this.src='/images/upload/avatars/noavatar_medium.gif';" /></ p >  < p >< a href ="javascript:;" onclick ="$('avatarctrl').style.display = ''" > Flash头像 </ a >  </ p >  </ div >  < div id ="avatarctrl" style ="display: none" >  < script type ="text/javascript" > document.write(AC_FL_RunContent( ' width ' , ' 540 ' , ' height ' , ' 253 ' , ' scale ' , ' exactfit ' , ' src ' , ' <% =avatarFlashParam %> ' , ' id ' , ' mycamera ' , ' name ' , ' mycamera ' , ' quality ' , ' high ' , ' bgcolor ' , ' #ffffff ' , ' wmode ' , ' transparent ' , ' menu ' , ' false ' , ' swLiveConnect ' , ' true ' , ' allowScriptAccess ' , ' always ' )); </ script >  </ div >  < script type ="text/javascript" >  function updateavatar(sender, args) {

            $( ' avatar ' ).src = ' <%=Localhost %>/images/upload/avatars/<%=uid %>/medium.jpg?random=1 ' + Math.random();

            $( ' avatarctrl ' ).style.display = ' none ' ;

            }

            updateavatar(); </ script >  </ td >  </ tr >  </ tbody >  </ table >  </ form >  </ body >  </ html >
        

　　

　　.cs代码

            using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; namespace Avatar

            { public partial class Default : System.Web.UI.Page

            { protected string avatarFlashParam; protected string EncodeLocalhost; protected string Localhost; protected string uid; protected void Page_Load( object sender, EventArgs e)

            { int port = HttpContext.Current.Request.Url.Port; string ApplicationPath = HttpContext.Current.Request.ApplicationPath != " / " ? HttpContext.Current.Request.ApplicationPath : string .Empty;

            uid = " 1 " ;

            Localhost = string .Format( " {0}://{1}{2}{3} " ,

            HttpContext.Current.Request.Url.Scheme,

            HttpContext.Current.Request.Url.Host,

            (port == 80 || port == 0 ) ? "" : " : " + port,

            ApplicationPath);

            EncodeLocalhost = HttpUtility.UrlEncode(Localhost);

            avatarFlashParam = string .Format( " {0}/images/common/camera.swf?nt=1&inajax=1&appid=1&input={1}&ucapi={2}/Ajax.ashx " , Localhost, uid, EncodeLocalhost);

            }

            }

            }
        

　　关键的部分是各个文件的路径，uid是会员的ID，存放会员头像的文件夹名。

Ajax.ashx的代码

            <% @ WebHandler Language = " C# " Class = " Ajax " %>  using System; using System.Web; using System.IO; public class Ajax : IHttpHandler { public void ProcessRequest (HttpContext context) { string uid = context.Request.QueryString[ " input " ]; if ( ! string .IsNullOrEmpty(context.Request[ " Filename " ]) && ! string .IsNullOrEmpty(context.Request[ " Upload " ]))

            {

            ResponseText(UploadTempAvatar(uid));

            } if ( ! string .IsNullOrEmpty(context.Request[ " avatar1 " ]) && ! string .IsNullOrEmpty(context.Request[ " avatar2 " ]) && ! string .IsNullOrEmpty(context.Request[ " avatar3 " ]))

            {
CreateDir(uid); if ( ! (SaveAvatar( " avatar1 " , uid) && SaveAvatar( " avatar2 " , uid) && SaveAvatar( " avatar3 " , uid)))

            {

            File.Delete(GetMapPath( " images\\upload\\avatars\\ " + uid + " .jpg " ));

            ResponseText( " <?xml version=\ " 1.0 \ " ?><root><face success=\ " 0 \ " /></root> " ); return ;

            }

            File.Delete(GetMapPath( " images\\upload\\avatars\\ " + uid + " .jpg " ));

            ResponseText( " <?xml version=\ " 1.0 \ " ?><root><face success=\ " 1 \ " /></root> " ); return ;

            }

            } public bool IsReusable { get { return false ;

            }

            } private void CreateDir( string uid)

            { string avatarDir = string .Format( " images/upload/avatars/{0} " ,

            uid); if ( ! Directory.Exists(GetMapPath(avatarDir)))

            Directory.CreateDirectory(GetMapPath(avatarDir));

            } private void ResponseText( string text)

            {

            HttpContext.Current.Response.Clear();

            HttpContext.Current.Response.Write(text);

            HttpContext.Current.Response.End();

            } private string UploadTempAvatar( string uid)

            { string filename = uid + " .jpg " ; string uploadUrl = GetRootUrl( " images/ " ) + " upload/avatars " ; string uploadDir = GetMapPath( " images\\upload\\avatars " ); if ( ! Directory.Exists(uploadDir + " temp\\ " ))

            Directory.CreateDirectory(uploadDir + " temp\\ " );
filename = " temp/ " + filename; if (HttpContext.Current.Request.Files.Count > 0 )

            {

            HttpContext.Current.Request.Files[ 0 ].SaveAs(uploadDir + filename);

            } return uploadUrl + filename;

            } private byte [] FlashDataDecode( string s)

            { byte [] r = new byte [s.Length / 2 ]; int l = s.Length; for ( int i = 0 ; i < l; i = i + 2 )

            { int k1 = (( int )s[i]) - 48 ;

            k1 -= k1 > 9 ? 7 : 0 ; int k2 = (( int )s[i + 1 ]) - 48 ;

            k2 -= k2 > 9 ? 7 : 0 ;

            r[i / 2 ] = ( byte )(k1 << 4 | k2);

            } return r;

            } private bool SaveAvatar( string avatar, string uid)

            { byte [] b = FlashDataDecode(HttpContext.Current.Request[avatar]); if (b.Length == 0 ) return false ; string size = "" ; if (avatar == " avatar1 " )

            size = " large " ; else if (avatar == " avatar2 " )

            size = " medium " ; else size = " small " ; string avatarFileName = string .Format( " images/upload/avatars/{0}/{1}.jpg " ,

            uid, size);

            FileStream fs = new FileStream(GetMapPath(avatarFileName), FileMode.Create);

            fs.Write(b, 0 , b.Length);

            fs.Close(); return true ;

            } public static string GetRootUrl( string forumPath)

            { string ApplicationPath = HttpContext.Current.Request.ApplicationPath != " / " ? HttpContext.Current.Request.ApplicationPath : string .Empty; int port = HttpContext.Current.Request.Url.Port; return string .Format( " {0}://{1}{2}{3}/{4} " ,

            HttpContext.Current.Request.Url.Scheme,

            HttpContext.Current.Request.Url.Host,

            (port == 80 || port == 0 ) ? "" : " : " + port,

            ApplicationPath,

            forumPath);

            } public static string GetMapPath( string strPath)

            { if (HttpContext.Current != null )

            { return HttpContext.Current.Server.MapPath(strPath);

            } else // 非web程序引用  {

            strPath = strPath.Replace( " / " , " \\ " ); if (strPath.StartsWith( " \\ " ))

            {

            strPath = strPath.Substring(strPath.IndexOf( ' \\ ' , 1 )).TrimStart( ' \\ ' );

            } return System.IO.Path.Combine(AppDomain.CurrentDomain.BaseDirectory, strPath);

            }

            }

            }
        

　　关键的部分是存放头像的路径。这个flash最终会生成 3个大，中，小的头像，如果只需要保存其中一个

if ( ! string .IsNullOrEmpty(context.Request[ " avatar1 " ]) && ! string .IsNullOrEmpty(context.Request[ " avatar2 " ]) && ! string .IsNullOrEmpty(context.Request[ " avatar3 " ]))

　　可以修改这里的代码。

　　如果flash 提示 I/0 错误，都是路径的问题。

　　总结：flash版的使用相对于silverlight版要简单得多，改动较小，只需修改cs代码，但功能也少（有能力的朋友可以扩展那个 swf的功能）。

　　 代码下载 http://files.cnblogs.com/geass/Avatar.rar   项目是用 2010，没有的朋友可以单独复制里面的文件。