asp.net文件上传带进度条实现案例（多种风格）

%@ Page Language="C#" %> 
%@ Register Assembly="MattBerseth.WebControls.AJAX" Namespace="MattBerseth.WebControls.AJAX.Progress" TagPrefix="mb" %> 
 
!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>Untitled Page/title> 
 link rel="Stylesheet" href="_assets/css/progress.css" mce_href="_assets/css/progress.css" /> 
 link rel="Stylesheet" href="_assets/css/upload.css" mce_href="_assets/css/upload.css" /> 
 mce:style type="text/css">!-- 
 BODY{ font-family:Arial, Sans-Serif; font-size:12px;} 
 
-->/mce:style>style type="text/css" mce_bogus="1"> BODY{ font-family:Arial, Sans-Serif; font-size:12px;} 
 /style> 
 mce:script type="text/C#" runat="server">!-- 
 
 protected void Page_Load(object sender, EventArgs args) 
 { 
 if (!this.IsPostBack) 
 { 
 this.Session["UploadInfo"] = new UploadInfo { IsReady = false }; 
 } 
 } 
 
 /// summary> 
 /// 
 /// /summary> 
 [System.Web.Services.WebMethod] 
 [System.Web.Script.Services.ScriptMethod] 
 public static object GetUploadStatus() 
 { 
 //获取文件长度 
 UploadInfo info = HttpContext.Current.Session["UploadInfo"] as UploadInfo; 
 
 if (info != null  info.IsReady) 
 { 
 int soFar = info.UploadedLength; 
 int total = info.ContentLength; 
 
 int percentComplete = (int)Math.Ceiling((double)soFar / (double)total * 100); 
 string message = string.Format("上传 {0} ... {1} of {2} 字节", info.FileName, soFar, total); 
 
 // 返回百分比 
 return new { percentComplete = percentComplete, message = message }; 
 } 
 
 // 还没有准备好... 
 return null; 
 } 
 
 
// -->/mce:script> 
/head> 
body> 
 form id="form1" runat="server"> 
 asp:ScriptManager ID="scriptManager" runat="server" EnablePageMethods="true" /> 
 
 mce:script type="text/javascript">!-- 
 var intervalID = 0; 
 var progressBar; 
 var fileUpload; 
 var form; 
 // 进度条 
 function pageLoad(){ 
 $addHandler($get('upload'), 'click', onUploadClick); 
 progressBar = $find('progress'); 
 } 
 // 注册表单 
 function register(form, fileUpload){ 
 this.form = form; 
 this.fileUpload = fileUpload; 
 } 
 //上传验证 
 function onUploadClick() { 
 var vaild = fileUpload.value.length > 0; 
 if(vaild){ 
 $get('upload').disabled = 'disabled'; 
 updateMessage('info', '初始化上传...'); 
 //提交上传 
 form.submit(); 
 // 隐藏frame 
 Sys.UI.DomElement.addCssClass($get('uploadFrame'), 'hidden'); 
 // 0开始显示进度条 
 progressBar.set_percentage(0); 
 progressBar.show(); 
 // 上传过程 
 intervalID = window.setInterval(function(){ 
 PageMethods.GetUploadStatus(function(result){ 
 if(result){ 
 // 更新进度条为新值 
 progressBar.set_percentage(result.percentComplete); 
 //更新信息 
 updateMessage('info', result.message); 
 
 if(result == 100){ 
 // 自动消失 
 window.clearInterval(intervalID); 
 } 
 } 
 }); 
 }, 500); 
 } 
 else{ 
 onComplete('error', '您必需选择一个文件'); 
 } 
 } 
 
 function onComplete(type, msg){ 
 // 自动消失 
 window.clearInterval(intervalID); 
 // 显示消息 
 updateMessage(type, msg); 
 // 隐藏进度条 
 progressBar.hide(); 
 progressBar.set_percentage(0); 
 // 重新启用按钮 
 $get('upload').disabled = ''; 
 // 显示frame 
 Sys.UI.DomElement.removeCssClass($get('uploadFrame'), 'hidden'); 
 } 
 function updateMessage(type, value){ 
 var status = $get('status'); 
 status.innerHTML = value; 
 // 移除样式 
 status.className = ''; 
 Sys.UI.DomElement.addCssClass(status, type); 
 } 
 
 
// -->/mce:script> 
 
 div> 
 div class="upload"> 
 h3>文件上传/h3> 
 div> 
 iframe id="uploadFrame" frameborder="0" scrolling="no" src="Upload.aspx" mce_src="Upload.aspx">/iframe> 
 mb:ProgressControl ID="progress" runat="server" CssClass="lightblue" style="display:none" mce_style="display:none" Value="0" Mode="Manual" Speed=".4" Width="100%" /> 
 div> 
 div id="status" class="info">请选择要上传的文件/div> 
 div class="commands"> 
 input id="upload" type="button" value="上传" /> 
 /div> 
 /div> 
 /div> 
 /div> 
 
 /div> 
 /form> 
/body> 
/html> 

//限制大小 1M 
 protected void Page_Load2(object sender, EventArgs e) 
 { 
 if (this.IsPostBack) 
 { 
 UploadInfo uploadInfo = this.Session["UploadInfo"] as UploadInfo; 
 if (uploadInfo == null) 
 { 
 // 让父页面知道无法处理上传 
 const string js = "window.parent.onComplete('error', '无法上传文件。请刷新页面，然后再试一次);"; 
 ScriptManager.RegisterStartupScript(this, typeof(upload_aspx), "progress", js, true); 
 } 
 else 
 { 
 // 让服务端知道我们还没有准备好.. 
 uploadInfo.IsReady = false; 
 
 // 上传验证 
 if (this.fileUpload.PostedFile != null  this.fileUpload.PostedFile.ContentLength > 0 
 
  this.fileUpload.PostedFile.ContentLength  1048576)// 限制1M 
 { 
 // 设置路径 
 string path = this.Server.MapPath(@"Uploads"); 
 string fileName = Path.GetFileName(this.fileUpload.PostedFile.FileName); 
 
 // 上传信息 
 uploadInfo.ContentLength = this.fileUpload.PostedFile.ContentLength; 
 uploadInfo.FileName = fileName; 
 uploadInfo.UploadedLength = 0; 
 
 //文件存在 初始化... 
 uploadInfo.IsReady = true; 
 
 //缓存 
 int bufferSize = 1; 
 byte[] buffer = new byte[bufferSize]; 
 
 // 保存字节 
 using (FileStream fs = new FileStream(Path.Combine(path, fileName), FileMode.Create)) 
 { 
 while (uploadInfo.UploadedLength  uploadInfo.ContentLength) 
 { 
 //从输入流放进缓冲区 
 int bytes = this.fileUpload.PostedFile.InputStream.Read(buffer, 0, bufferSize); 
 // 字节写入文件流 
 fs.Write(buffer, 0, bytes); 
 // 更新大小 
 uploadInfo.UploadedLength += bytes; 
 
 // 线程睡眠 上传就更慢 这样就可以看到进度条了 
 System.Threading.Thread.Sleep(100); 
 } 
 } 
 
 // 删除. 
 File.Delete(Path.Combine(path, fileName)); 
 
 // 让父页面知道已经处理上传完毕 
 const string js = "window.parent.onComplete('success', '{0} 已成功上传');"; 
 ScriptManager.RegisterStartupScript(this, typeof(upload_aspx), "progress", string.Format(js, fileName), true); 
 } 
 else 
 { 
 if (this.fileUpload.PostedFile.ContentLength >= 1048576)//1M 
 { 
 const string js = "window.parent.onComplete('error', '超出上传文件限制大小，请重新选择');"; 
 ScriptManager.RegisterStartupScript(this, typeof(upload_aspx), "progress", js, true); 
 } 
 else 
 { 
 const string js = "window.parent.onComplete('error', '上传文件出错');"; 
 ScriptManager.RegisterStartupScript(this, typeof(upload_aspx), "progress", js, true); 
 } 
 } 
 uploadInfo.IsReady = false; 
 } 
 } 
 } 
 
 // 不限制大小 
 protected void Page_Load(object sender, EventArgs e) 
 { 
 if (this.IsPostBack) 
 { 
 UploadInfo uploadInfo = this.Session["UploadInfo"] as UploadInfo; 
 uploadInfo.IsReady = false; 
 if (this.fileUpload.PostedFile != null  this.fileUpload.PostedFile.ContentLength > 0) 
 { 
 string path = this.Server.MapPath(@"Uploads"); 
 string fileName = Path.GetFileName(this.fileUpload.PostedFile.FileName); 
 
 uploadInfo.ContentLength = this.fileUpload.PostedFile.ContentLength; 
 uploadInfo.FileName = fileName; 
 uploadInfo.UploadedLength = 0; 
 
 uploadInfo.IsReady = true; 
 
 int bufferSize = 1; 
 byte[] buffer = new byte[bufferSize]; 
 
 using (FileStream fs = new FileStream(Path.Combine(path, fileName), FileMode.Create)) 
 { 
 while (uploadInfo.UploadedLength  uploadInfo.ContentLength) 
 { 
 int bytes = this.fileUpload.PostedFile.InputStream.Read(buffer, 0, bufferSize); 
 fs.Write(buffer, 0, bytes); 
 uploadInfo.UploadedLength += bytes; 
 } 
 } 
 const string js = "window.parent.onComplete('success', '{0} 已成功上传');"; 
 ScriptManager.RegisterStartupScript(this, typeof(upload_aspx), "progress", string.Format(js, fileName), true); 
 } 
 else 
 { 
 const string js = "window.parent.onComplete('error', '上传文件出错');"; 
 ScriptManager.RegisterStartupScript(this, typeof(upload_aspx), "progress", js, true); 
 } 
 uploadInfo.IsReady = false; 
 } 
 }